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    SEC Form SC 13D/A filed

    2/10/21 5:15:56 PM ET
    $KLDO
    Biotechnology: Biological Products (No Diagnostic Substances)
    Health Care
    Get the next $KLDO alert in real time by email
    SC 13D/A 1 d13195dsc13da.htm SCHEDULE 13D/A Schedule 13D/A

     

     

    SECURITIES AND EXCHANGE COMMISSION

    Washington, D.C. 20549

     

     

    SCHEDULE 13D

    Under the Securities Exchange Act of 1934

    (Amendment No. 2)*

     

     

    Kaleido Biosciences, Inc.

    (Name of Issuer)

    Common Stock, par value $0.001 per share

    (Title of Class of Securities)

    483347100

    (CUSIP Number)

    Noubar B. Afeyan, Ph.D.

    Flagship Ventures

    55 Cambridge Parkway, Suite 800E

    Cambridge, MA 02142

    (617) 868-1888

    (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

    February 8, 2021

    (Date of Event Which Requires Filing of this Statement)

     

     

    If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. ☐

     

    *

    The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

    The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934, as amended (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

     

     

     


    CUSIP No. 483347100      

     

      1.    

      Names of Reporting Persons.

     

      Flagship VentureLabs IV, LLC

      2.  

      Check the Appropriate Box if a Member of a Group (See Instructions)

      (a)  ☐        (b)  ☐

     

      3.  

      SEC Use Only

     

      4.  

      Source of Funds (See Instructions)

     

      WC

      5.  

      Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)

     

      ☐

      6.  

      Citizenship or Place of Organization

     

      Delaware

    Number of

    Shares

     Beneficially 

    Owned by

    Each

    Reporting

    Person

    With

     

         7.     

      Sole Voting Power

     

      0

         8.   

      Shared Voting Power

     

      42,865

         9.   

      Sole Dispositive Power

     

      0

       10.   

      Shared Dispositive Power

     

      42,865

    11.    

      Aggregate Amount Beneficially Owned by Each Reporting Person

     

      42,865

    12.  

      Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)

     

      ☐

    13.  

      Percent of Class Represented by Amount in Row (11)

     

      0.1%

    14.  

      Type of Reporting Person (See Instructions)

     

      OO

     


    CUSIP No. 483347100      

     

      1.    

      Names of Reporting Persons.

     

      Flagship Ventures Fund IV, L.P.

      2.  

      Check the Appropriate Box if a Member of a Group (See Instructions)

      (a)  ☐        (b)  ☐

     

      3.  

      SEC Use Only

     

      4.  

      Source of Funds (See Instructions)

     

      WC

      5.  

      Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)

     

      ☐

      6.  

      Citizenship or Place of Organization

     

      Delaware

    Number of

    Shares

     Beneficially 

    Owned by

    Each

    Reporting

    Person

    With

     

         7.     

      Sole Voting Power

     

      0

         8.   

      Shared Voting Power

     

      1,728,309

         9.   

      Sole Dispositive Power

     

      0

       10.   

      Shared Dispositive Power

     

      1,728,309

    11.    

      Aggregate Amount Beneficially Owned by Each Reporting Person

     

      1,728,309

    12.  

      Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)

     

      ☐

    13.  

      Percent of Class Represented by Amount in Row (11)

     

      4.2%

    14.  

      Type of Reporting Person (See Instructions)

     

      PN

     


    CUSIP No. 483347100      

     

      1.    

      Names of Reporting Persons.

     

      Flagship Ventures Fund IV General Partner LLC

      2.  

      Check the Appropriate Box if a Member of a Group (See Instructions)

      (a)  ☐        (b)  ☐

     

      3.  

      SEC Use Only

     

      4.  

      Source of Funds (See Instructions)

     

      AF

      5.  

      Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)

     

      ☐

      6.  

      Citizenship or Place of Organization

     

      Delaware

    Number of

    Shares

     Beneficially 

    Owned by

    Each

    Reporting

    Person

    With

     

         7.     

      Sole Voting Power

     

      0

         8.   

      Shared Voting Power

     

      1,728,309

         9.   

      Sole Dispositive Power

     

      0

       10.   

      Shared Dispositive Power

     

      1,728,309

    11.    

      Aggregate Amount Beneficially Owned by Each Reporting Person

     

      1,728,309

    12.  

      Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)

     

      ☐

    13.  

      Percent of Class Represented by Amount in Row (11)

     

      4.2%

    14.  

      Type of Reporting Person (See Instructions)

     

      OO

     


    CUSIP No. 483347100      

     

      1.    

      Names of Reporting Persons.

     

      Flagship VentureLabs V, LLC

      2.  

      Check the Appropriate Box if a Member of a Group (See Instructions)

      (a)  ☐        (b)  ☐

     

      3.  

      SEC Use Only

     

      4.  

      Source of Funds (See Instructions)

     

      WC

      5.  

      Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)

     

      ☐

      6.  

      Citizenship or Place of Organization

     

      Delaware

    Number of

    Shares

     Beneficially 

    Owned by

    Each

    Reporting

    Person

    With

     

         7.     

      Sole Voting Power

     

      0

         8.   

      Shared Voting Power

     

      2,500,000

         9.   

      Sole Dispositive Power

     

      0

       10.   

      Shared Dispositive Power

     

      2,500,000

    11.    

      Aggregate Amount Beneficially Owned by Each Reporting Person

     

      2,500,000

    12.  

      Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)

     

      ☐

    13.  

      Percent of Class Represented by Amount in Row (11)

     

      6.1%

    14.  

      Type of Reporting Person (See Instructions)

     

      OO

     


    CUSIP No. 483347100      

     

      1.    

      Names of Reporting Persons.

     

      Flagship VentureLabs V Manager LLC

      2.  

      Check the Appropriate Box if a Member of a Group (See Instructions)

      (a)  ☐        (b)  ☐

     

      3.  

      SEC Use Only

     

      4.  

      Source of Funds (See Instructions)

     

      WC

      5.  

      Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)

     

      ☐

      6.  

      Citizenship or Place of Organization

     

      Delaware

    Number of

    Shares

     Beneficially 

    Owned by

    Each

    Reporting

    Person

    With

     

         7.     

      Sole Voting Power

     

      0

         8.   

      Shared Voting Power

     

      2,500,000

         9.   

      Sole Dispositive Power

     

      0

       10.   

      Shared Dispositive Power

     

      2,500,000

    11.    

      Aggregate Amount Beneficially Owned by Each Reporting Person

     

      2,500,000

    12.  

      Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)

     

      ☐

    13.  

      Percent of Class Represented by Amount in Row (11)

     

      6.1%

    14.  

      Type of Reporting Person (See Instructions)

     

      OO

     


    CUSIP No. 483347100      

     

      1.    

      Names of Reporting Persons.

     

      Flagship Pioneering, Inc.

      2.  

      Check the Appropriate Box if a Member of a Group (See Instructions)

      (a)  ☐        (b)  ☐

     

      3.  

      SEC Use Only

     

      4.  

      Source of Funds (See Instructions)

     

      WC

      5.  

      Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)

     

      ☐

      6.  

      Citizenship or Place of Organization

     

      Delaware

    Number of

    Shares

     Beneficially 

    Owned by

    Each

    Reporting

    Person

    With

     

         7.     

      Sole Voting Power

     

      0

         8.   

      Shared Voting Power

     

      2,500,000

         9.   

      Sole Dispositive Power

     

      0

       10.   

      Shared Dispositive Power

     

      2,500,000

    11.    

      Aggregate Amount Beneficially Owned by Each Reporting Person

     

      2,500,000

    12.  

      Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)

     

      ☐

    13.  

      Percent of Class Represented by Amount in Row (11)

     

      6.1%

    14.  

      Type of Reporting Person (See Instructions)

     

      CO

     


    CUSIP No. 483347100      

     

      1.    

      Names of Reporting Persons.

     

      Flagship Ventures Fund V, L.P.

      2.  

      Check the Appropriate Box if a Member of a Group (See Instructions)

      (a)  ☐        (b)  ☐

     

      3.  

      SEC Use Only

     

      4.  

      Source of Funds (See Instructions)

     

      WC

      5.  

      Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)

     

      ☐

      6.  

      Citizenship or Place of Organization

     

      Delaware

    Number of

    Shares

     Beneficially 

    Owned by

    Each

    Reporting

    Person

    With

     

         7.     

      Sole Voting Power

     

      0

         8.   

      Shared Voting Power

     

      2,560,096

         9.   

      Sole Dispositive Power

     

      0

       10.   

      Shared Dispositive Power

     

      2,560,096

    11.    

      Aggregate Amount Beneficially Owned by Each Reporting Person

     

      2,560,096

    12.  

      Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)

     

      ☐

    13.  

      Percent of Class Represented by Amount in Row (11)

     

      6.2%

    14.  

      Type of Reporting Person (See Instructions)

     

      PN

     


    CUSIP No. 483347100      

     

      1.    

      Names of Reporting Persons.

     

      Nutritional Health Side Fund, L.P.

      2.  

      Check the Appropriate Box if a Member of a Group (See Instructions)

      (a)  ☐        (b)  ☐

     

      3.  

      SEC Use Only

     

      4.  

      Source of Funds (See Instructions)

     

      WC

      5.  

      Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)

     

      ☐

      6.  

      Citizenship or Place of Organization

     

      Delaware

    Number of

    Shares

     Beneficially 

    Owned by

    Each

    Reporting

    Person

    With

     

         7.     

      Sole Voting Power

     

      0

         8.   

      Shared Voting Power

     

      639,360

         9.   

      Sole Dispositive Power

     

      0

       10.   

      Shared Dispositive Power

     

      639,360

    11.    

      Aggregate Amount Beneficially Owned by Each Reporting Person

     

      639,360

    12.  

      Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)

     

      ☐

    13.  

      Percent of Class Represented by Amount in Row (11)

     

      1.6%

    14.  

      Type of Reporting Person (See Instructions)

     

      PN

     


    CUSIP No. 483347100      

     

      1.    

      Names of Reporting Persons.

     

      Nutritional Health Disruptive Innovation Fund, L.P.

      2.  

      Check the Appropriate Box if a Member of a Group (See Instructions)

      (a)  ☐        (b)  ☐

     

      3.  

      SEC Use Only

     

      4.  

      Source of Funds (See Instructions)

     

      WC

      5.  

      Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)

     

      ☐

      6.  

      Citizenship or Place of Organization

     

      Delaware

    Number of

    Shares

     Beneficially 

    Owned by

    Each

    Reporting

    Person

    With

     

         7.     

      Sole Voting Power

     

      0

         8.   

      Shared Voting Power

     

      6,560,523

         9.   

      Sole Dispositive Power

     

      0

       10.   

      Shared Dispositive Power

     

      6,560,523

    11.    

      Aggregate Amount Beneficially Owned by Each Reporting Person

     

      6,560,523

    12.  

      Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)

     

      ☐

    13.  

      Percent of Class Represented by Amount in Row (11)

     

      16.0%

    14.  

      Type of Reporting Person (See Instructions)

     

      PN

     


    CUSIP No. 483347100      

     

      1.    

      Names of Reporting Persons.

     

      Flagship Ventures Fund V General Partner LLC

      2.  

      Check the Appropriate Box if a Member of a Group (See Instructions)

      (a)  ☐        (b)  ☐

     

      3.  

      SEC Use Only

     

      4.  

      Source of Funds (See Instructions)

     

      AF

      5.  

      Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)

     

      ☐

      6.  

      Citizenship or Place of Organization

     

      Delaware

    Number of

    Shares

     Beneficially 

    Owned by

    Each

    Reporting

    Person

    With

     

         7.     

      Sole Voting Power

     

      0

         8.   

      Shared Voting Power

     

      9,759,979

         9.   

      Sole Dispositive Power

     

      0

       10.   

      Shared Dispositive Power

     

      9,759,979

    11.    

      Aggregate Amount Beneficially Owned by Each Reporting Person

     

      9,759,979

    12.  

      Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)

     

      ☐

    13.  

      Percent of Class Represented by Amount in Row (11)

     

      23.8%

    14.  

      Type of Reporting Person (See Instructions)

     

      OO

     


    CUSIP No. 483347100      

     

      1.    

      Names of Reporting Persons.

     

      Nutritional Health LTP Fund, L.P.

      2.  

      Check the Appropriate Box if a Member of a Group (See Instructions)

      (a)  ☐        (b)  ☐

     

      3.  

      SEC Use Only

     

      4.  

      Source of Funds (See Instructions)

     

      WC

      5.  

      Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)

     

      ☐

      6.  

      Citizenship or Place of Organization

     

      Delaware

    Number of

    Shares

     Beneficially 

    Owned by

    Each

    Reporting

    Person

    With

     

         7.     

      Sole Voting Power

     

      0

         8.   

      Shared Voting Power

     

      738,333

         9.   

      Sole Dispositive Power

     

      0

       10.   

      Shared Dispositive Power

     

      738,333

    11.    

      Aggregate Amount Beneficially Owned by Each Reporting Person

     

      738,333

    12.  

      Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)

     

      ☐

    13.  

      Percent of Class Represented by Amount in Row (11)

     

      1.8%

    14.  

      Type of Reporting Person (See Instructions)

     

      PN

     


    CUSIP No. 483347100      

     

      1.    

      Names of Reporting Persons.

     

      Nutritional Health LTP General Partner LLC

      2.  

      Check the Appropriate Box if a Member of a Group (See Instructions)

      (a)  ☐        (b)  ☐

     

      3.  

      SEC Use Only

     

      4.  

      Source of Funds (See Instructions)

     

      AF

      5.  

      Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)

     

      ☐

      6.  

      Citizenship or Place of Organization

     

      Delaware

    Number of

    Shares

     Beneficially 

    Owned by

    Each

    Reporting

    Person

    With

     

         7.     

      Sole Voting Power

     

      0

         8.   

      Shared Voting Power

     

      738,333

         9.   

      Sole Dispositive Power

     

      0

       10.   

      Shared Dispositive Power

     

      738,333

    11.    

      Aggregate Amount Beneficially Owned by Each Reporting Person

     

      738,333

    12.  

      Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)

     

      ☐

    13.  

      Percent of Class Represented by Amount in Row (11)

     

      1.8%

    14.  

      Type of Reporting Person (See Instructions)

     

      OO

     


    CUSIP No. 483347100      

     

      1.    

      Names of Reporting Persons.

     

      Flagship Ventures Opportunities Fund I, L.P.

      2.  

      Check the Appropriate Box if a Member of a Group (See Instructions)

      (a)  ☐        (b)  ☐

     

      3.  

      SEC Use Only

     

      4.  

      Source of Funds (See Instructions)

     

      WC

      5.  

      Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)

     

      ☐

      6.  

      Citizenship or Place of Organization

     

      Delaware

    Number of

    Shares

     Beneficially 

    Owned by

    Each

    Reporting

    Person

    With

     

         7.     

      Sole Voting Power

     

      0

         8.   

      Shared Voting Power

     

      2,982,639

         9.   

      Sole Dispositive Power

     

      0

       10.   

      Shared Dispositive Power

     

      2,982,639

    11.    

      Aggregate Amount Beneficially Owned by Each Reporting Person

     

      2,982,639

    12.  

      Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)

     

      ☐

    13.  

      Percent of Class Represented by Amount in Row (11)

     

      7.3%

    14.  

      Type of Reporting Person (See Instructions)

     

      PN

     


    CUSIP No. 483347100      

     

      1.    

      Names of Reporting Persons.

     

      Flagship Ventures Opportunities Fund I General Partner LLC

      2.  

      Check the Appropriate Box if a Member of a Group (See Instructions)

      (a)  ☐        (b)  ☐

     

      3.  

      SEC Use Only

     

      4.  

      Source of Funds (See Instructions)

     

      AF

      5.  

      Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)

     

      ☐

      6.  

      Citizenship or Place of Organization

     

      Delaware

    Number of

    Shares

     Beneficially 

    Owned by

    Each

    Reporting

    Person

    With

     

         7.     

      Sole Voting Power

     

      0

         8.   

      Shared Voting Power

     

      2,982,639

         9.   

      Sole Dispositive Power

     

      0

       10.   

      Shared Dispositive Power

     

      2,982,639

    11.    

      Aggregate Amount Beneficially Owned by Each Reporting Person

     

      2,982,639

    12.  

      Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)

     

      ☐

    13.  

      Percent of Class Represented by Amount in Row (11)

     

      7.3%

    14.  

      Type of Reporting Person (See Instructions)

     

      OO

     


    CUSIP No. 483347100      

     

      1.    

      Names of Reporting Persons.

     

      Flagship Ventures Fund 2007, L.P.

      2.  

      Check the Appropriate Box if a Member of a Group (See Instructions)

      (a)  ☐        (b)  ☐

     

      3.  

      SEC Use Only

     

      4.  

      Source of Funds (See Instructions)

     

      WC

      5.  

      Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)

     

      ☐

      6.  

      Citizenship or Place of Organization

     

      Delaware

    Number of

    Shares

     Beneficially 

    Owned by

    Each

    Reporting

    Person

    With

     

         7.     

      Sole Voting Power

     

      0

         8.   

      Shared Voting Power

     

      216,451

         9.   

      Sole Dispositive Power

     

      0

       10.   

      Shared Dispositive Power

     

      216,451

    11.    

      Aggregate Amount Beneficially Owned by Each Reporting Person

     

      216,451

    12.  

      Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)

     

      ☐

    13.  

      Percent of Class Represented by Amount in Row (11)

     

      0.5%

    14.  

      Type of Reporting Person (See Instructions)

     

      PN

     


    CUSIP No. 483347100      

     

      1.    

      Names of Reporting Persons.

     

      Flagship Ventures 2007 General Partner LLC

      2.  

      Check the Appropriate Box if a Member of a Group (See Instructions)

      (a)  ☐        (b)  ☐

     

      3.  

      SEC Use Only

     

      4.  

      Source of Funds (See Instructions)

     

      AF

      5.  

      Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)

     

      ☐

      6.  

      Citizenship or Place of Organization

     

      Delaware

    Number of

    Shares

     Beneficially 

    Owned by

    Each

    Reporting

    Person

    With

     

         7.     

      Sole Voting Power

     

      0

         8.   

      Shared Voting Power

     

      216,451

         9.   

      Sole Dispositive Power

     

      0

       10.   

      Shared Dispositive Power

     

      216,451

    11.    

      Aggregate Amount Beneficially Owned by Each Reporting Person

     

      216,451

    12.  

      Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)

     

      ☐

    13.  

      Percent of Class Represented by Amount in Row (11)

     

      0.5%

    14.  

      Type of Reporting Person (See Instructions)

     

      OO

     


    CUSIP No. 483347100      

     

      1.    

      Names of Reporting Persons.

     

      Cadena LLC

      2.  

      Check the Appropriate Box if a Member of a Group (See Instructions)

      (a)  ☐        (b)  ☐

     

      3.  

      SEC Use Only

     

      4.  

      Source of Funds (See Instructions)

     

      WC

      5.  

      Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)

     

      ☐

      6.  

      Citizenship or Place of Organization

     

      Delaware

    Number of

    Shares

     Beneficially 

    Owned by

    Each

    Reporting

    Person

    With

     

         7.     

      Sole Voting Power

     

      0

         8.   

      Shared Voting Power

     

      1,649,999

         9.   

      Sole Dispositive Power

     

      0

       10.   

      Shared Dispositive Power

     

      1,649,999

    11.    

      Aggregate Amount Beneficially Owned by Each Reporting Person

     

      1,649,999

    12.  

      Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)

     

      ☐

    13.  

      Percent of Class Represented by Amount in Row (11)

     

      4.0%

    14.  

      Type of Reporting Person (See Instructions)

     

      OO

     


    CUSIP No. 483347100      

     

      1.    

      Names of Reporting Persons.

     

      Noubar B. Afeyan, Ph.D.

      2.  

      Check the Appropriate Box if a Member of a Group (See Instructions)

      (a)  ☐        (b)  ☐

     

      3.  

      SEC Use Only

     

      4.  

      Source of Funds (See Instructions)

     

      AF

      5.  

      Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)

     

      ☐

      6.  

      Citizenship or Place of Organization

     

      United States of America

    Number of

    Shares

     Beneficially 

    Owned by

    Each

    Reporting

    Person

    With

     

         7.     

      Sole Voting Power

     

      0

         8.   

      Shared Voting Power

     

      19,575,710

         9.   

      Sole Dispositive Power

     

      0

       10.   

      Shared Dispositive Power

     

      19,575,710

    11.    

      Aggregate Amount Beneficially Owned by Each Reporting Person

     

      19,575,710

    12.  

      Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)

     

      ☐

    13.  

      Percent of Class Represented by Amount in Row (11)

     

      47.7%

    14.  

      Type of Reporting Person (See Instructions)

     

      IN

     


    Item 1.

    Security and Issuer

    This Amendment No. 2 (this “Amendment”) amends and supplements the Schedule 13D (the “Schedule 13D”) filed by the Reporting Persons (as defined below) on March 6, 2019, as amended, with respect to the common stock, $0.001 par value per share (“Common Stock”), of Kaleido Biosciences, Inc. (the “Issuer”). Except as specifically provided herein, this Amendment does not modify any of the information previously reported in the Schedule 13D.

     

    Item 2.

    Identity and Background

    Item 2 of the Schedule 13D is hereby amended and restated as follows:

    This Schedule 13D is being filed by the following persons (each a “Reporting Person”):

     

      i.

    Flagship VentureLabs IV, LLC, a Delaware limited liability company (“VentureLabs IV”). The manager of VentureLabs IV is Flagship Ventures Fund IV, L.P., a Delaware limited partnership (“Flagship Fund IV” and together with VentureLabs IV, the “Flagship Fund IV Funds”).

     

      ii.

    Flagship Fund IV. The general partner of Flagship Fund IV is Flagship Ventures Fund IV General Partner LLC (“Flagship Fund IV GP”).

     

      iii.

    Flagship Fund IV GP. Noubar B. Afeyan, Ph.D. (“Dr. Afeyan”) is the sole manager of Flagship IV GP.

     

      iv.

    Flagship VentureLabs V, LLC, a Delaware limited liability company (“VentureLabs V”). The manager of VentureLabs V is Flagship VentureLabs V Manager LLC, a Delaware limited liability company. (“VentureLabs V Manager”).

     

      v.

    VentureLabs V Manager. The manager of VentureLabs V Manager is Flagship Pioneering, Inc. (“Flagship Pioneering”), a Delaware company.

     

      vi.

    Flagship Pioneering Dr. Afeyan is the sole director of Flagship Pioneering

     

      vii.

    Flagship Ventures Fund V, L.P., a Delaware limited partnership (“Flagship Fund V”). The general partner of Flagship Fund V is Flagship Ventures Fund V General Partner LLC, a Delaware limited liability company (“Flagship Fund V GP”).

     

      viii.

    Nutritional Health Side Fund, L.P., a Delaware limited partnership (“Nutritional Health Side Fund”). Flagship Fund V GP is the general partner of Nutritional Health Side Fund.

     

      ix.

    Nutritional Health Disruptive Innovation Fund, L.P., a Delaware limited partnership (“Nutritional Innovation Fund” and together with Flagship Fund V and Nutritional Health Side Fund, the “Flagship Fund V Funds”). Flagship Fund V GP is the general partner of Nutritional Innovation Fund.

     

      x.

    Flagship Fund V GP. Dr. Afeyan is the sole manager of Flagship Fund V GP.

     

      xi.

    Nutritional Health LTP Fund, L.P., a Delaware limited partnership (“Nutritional LTP”). The general partner of Nutritional LTP is Nutritional Health LTP General Partner LLC, a Delaware limited liability company (“Nutritional LTP GP”).

     

      xii.

    Nutritional LTP GP. Dr. Afeyan is the sole member and manager of Nutritional LTP GP.

     

      xiii.

    Flagship Ventures Opportunities Fund I, L.P., a Delaware limited partnership (“Flagship Opportunities I).The general partner of Flagship Opportunities I is Flagship Ventures Opportunities Fund I General Partner LLC, a Delaware limited liability company (“Flagship Opportunities GP”).

     

      xiv.

    Flagship Opportunities GP. Dr. Afeyan is the sole manager of Flagship Opportunities GP.

     

      xv.

    Flagship Ventures Fund 2007, L.P., a Delaware limited partnership (“Flagship Fund 2007”). The general partner of Flagship Fund 2007 is Flagship Ventures 2007 General Partner LLC (“Flagship Fund 2007 GP”).

     

      xvi.

    Flagship Fund 2007 GP. Dr. Afeyan is the sole manager of Flagship Fund 2007 GP.


      xvii.

    Cadena LLC, a Delaware limited liability company (“Cadena” and together with the Flagship IV Funds, VentureLabs V, the Flagship V Funds, Nutritional LTP, Flagship Opportunities I and Flagship Fund 2007, the “Flagship Funds”). Dr. Afeyan is the sole manager of Cadena LLC.

     

      xviii.

    Dr. Afeyan, a citizen of the United States of America.

    The principal business of each Reporting Person is the venture capital investment business. The principal business address of each Reporting Person is 55 Cambridge Parkway, Suite 800E, Cambridge, Massachusetts 02142.

    During the last five years, none of the Reporting Persons has been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).

    During the last five years, none of the Reporting Persons has been party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding were or are subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

     

    Item 4.

    Purpose of Transaction

    Item 4 is hereby amended to include the following:

    On February 8, 2021, Flagship Fund IV, Flagship Opportunities I, and Nutritional LTP purchased an additional 71,666 shares, 71,667 shares, and 71,667 shares, respectively, of the Issuer’s Common Stock in an underwritten public offering (the “February 2021 Public Offering”) at a price per share of $11.50.

     

    Item 5.

    Interest in Securities of the Issuer

    Item 5(a)-(c) is hereby amended and restated as follows:

    (a)-(b) The information set forth in rows 7 through 13 of the cover pages to this Schedule 13D is incorporated by reference. The percentage set forth in row 13 is based on 41,079,506 outstanding shares of Common Stock immediately following the February 2021 Public Offering, as reported in the Issuer’s prospectus supplement filed on February 5, 2021, which does not include shares of Common Stock that may be issued if the underwriters exercise their option to purchase additional shares in the offering.

    VentureLabs IV and Flagship Fund IV directly hold 42,865 shares and 1,685,444 shares of Common Stock, respectively. Flagship Fund IV, as the manager of VentureLabs IV, may be deemed to beneficially own the shares directly held by VentureLabs IV. Flagship Fund IV GP, as the general partner of the Flagship Fund IV Funds, may be deemed to beneficially own the shares directly held by the Flagship Fund IV Funds.

    VentureLabs V, Flagship Fund V, Nutritional Health Side Fund and Nutritional Innovation Fund directly hold 2,500,000 shares, 2,560,096 shares, 639,360 shares and 6,560,523 shares of Common Stock, respectively. VentureLabs V Manager, as the manager of VentureLabs V, and Flagship Pioneering as the manager of VentureLabs V Manager, may be deemed to beneficially own the shares directly held by VentureLabs V. Flagship Fund V GP, as the general partner of the Flagship Fund V Funds, may be deemed to beneficially own the shares directly held by the Flagship Fund V Funds.

    Nutritional LTP directly holds 738,333 shares of Common Stock. Nutritional LTP GP, as the general partner of Nutritional LTP, may be deemed to beneficially own the shares directly held by Nutritional LTP.

    Flagship Opportunities I directly holds 2,982,639 shares of Common Stock. Flagship Opportunities GP, as the general partner of Flagship Opportunities I, may be deemed to beneficially own the shares directly held by Flagship Opportunities I.

    Flagship Fund 2007 directly holds 216,451 shares of Common Stock. Flagship Fund 2007 GP, as the general partner of Flagship Fund 2007, may be deemed to beneficially own the shares directly held by Flagship Fund 2007.

    Cadena LLC directly holds 1,649,999 shares of Common Stock.


    Dr. Afeyan, as the sole manager of Flagship Fund IV GP, Flagship Fund 2007 GP, Flagship Fund V GP, Nutritional LTP GP, Flagship Opportunities GP and Cadena LLC and as the sole director of Flagship Pioneering, Inc., may be deemed to beneficially own the shares directly held by the Flagship Fund IV Funds, Flagship Fund 2007, Flagship Fund V Funds, Nutritional LTP, VentureLabs V, Flagship Opportunities I and Cadena LLC.

    (c) On February 8, 2021, Flagship Fund IV, Flagship Opportunities I, and Nutritional LTP purchased an additional 71,666 shares, 71,667 shares, and 71,667 shares, respectively, of the Issuer’s Common Stock in connection with the June 2020 Public Offering. The purchase price was $11.50 per share.

     

    Item 6.

    Contracts, Arrangements, Understandings or Relationships with Respect to Securities of the Issuer

    Item 6 is hereby amended to include the following:

    In connection with the February 2021 Public Offering, the Flagship funds entered into a lock-up agreement (the “Lock-Up Agreement”) with Morgan Stanley & Co., LLC and Piper Sandler & Co. Pursuant to the terms of the Lock-Up Agreement, the Flagship Funds have agreed, with certain exceptions, during the period ending 90 days after February 3, 2021, not to

     

      •  

    offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase, or otherwise transfer or dispose of, directly or indirectly, any shares of the Issuer’s common stock or any securities convertible into or exercisable or exchangeable for our common stock (including without limitation, common stock or such other securities which may be deemed to be beneficially owned by the undersigned in accordance with the rules and regulations of the Securities and Exchange Commission and securities which may be issued upon exercise of a stock option or warrant), or publicly disclose the intention to make any offer, sale, pledge or disposition, or

     

      •  

    enter into any swap or other agreement that transfers, in whole or in part, any of the economic consequences of ownership of our common stock or such other securities, or publicly disclose the intention to enter into any such swap or other agreement.

    The foregoing description of the Lock-Up Agreement is qualified in its entirety by reference to the full text of the Form of Lock-Up Agreement, a copy of which is filed as Exhibit 2 hereto, and is incorporated by reference into this Item 6.

     

    Item 7.

    Material to be Filed as Exhibits

     

    Exhibit 1

       Joint Filing Agreement (filed herewith).

    Exhibit 2

       Lock-Up Agreement (incorporated by reference to ExhibitA-1 to Exhibit 1.1 to the Issuer’s Form 8-K filed on February 8, 2021).


    SIGNATURES

    After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

     

    Dated: February 10, 2021     FLAGSHIP VENTURELABS IV, LLC
        By:   Flagship Ventures Fund IV, L.P.
        By:  

    Flagship Ventures Fund IV General Partner LLC

          By:  

    /s/ Noubar B. Afeyan, Ph.D.

          Name:   Noubar B. Afeyan, Ph.D.
          Title:   Manager
        FLAGSHIP VENTURES FUND IV, L.P.
        By:  

    Flagship Ventures Fund IV General Partner LLC

          By:  

    /s/ Noubar B. Afeyan, Ph.D.

          Name:   Noubar B. Afeyan, Ph.D.
          Title:   Manager
        FLAGSHIP VENTURES FUND IV GENERAL PARTNER LLC
          By:  

    /s/ Noubar B. Afeyan, Ph.D.

          Name:   Noubar B. Afeyan, Ph.D.
          Title:   Manager
        FLAGSHIP VENTURELABS V, LLC
        By:   Flagship VentureLabs V Manager LLC
        By:   Flagship Pioneering, Inc.
          By:  

    /s/ Noubar B. Afeyan, Ph.D.

          Name:   Noubar B. Afeyan, Ph.D.
          Title:   Director
        FLAGSHIP VENTURELABS V MANAGER LLC
        By:   Flagship Pioneering, Inc.
          By:  

    /s/ Noubar B. Afeyan, Ph.D.

          Name:   Noubar B. Afeyan, Ph.D.
          Title:   Director


        FLAGSHIP PIONEERING, INC.
          By:  

    /s/ Noubar B. Afeyan, Ph.D.

          Name:   Noubar B. Afeyan, Ph.D.
          Title:   Director
        FLAGSHIP VENTURES FUND V, L.P.
        By:   Flagship Ventures Fund V General Partner LLC
          By:  

    /s/ Noubar B. Afeyan, Ph.D.

          Name:   Noubar B. Afeyan, Ph.D.
          Title:   Manager
        NUTRITIONAL HEALTH SIDE FUND, L.P.
        By:   Flagship Ventures Fund V General Partner LLC
          By:  

    /s/ Noubar B. Afeyan, Ph.D.

          Name:   Noubar B. Afeyan, Ph.D.
          Title:   Manager
        NUTRITIONAL HEALTH DISRUPTIVE INNOVATION FUND, L.P.
        By:   Flagship Ventures Fund V General Partner LLC
          By:  

    /s/ Noubar B. Afeyan, Ph.D.

          Name:   Noubar B. Afeyan, Ph.D.
          Title:   Manager
        FLAGSHIP VENTURES FUND V GENERAL PARTNER LLC
          By:  

    /s/ Noubar B. Afeyan, Ph.D.

          Name:   Noubar B. Afeyan, Ph.D.
          Title:   Manager
        NUTRITIONAL HEALTH LTP FUND, L.P.
        By:   Nutritional Health LTP Fund General Partner LLC
          By:  

    /s/ Noubar B. Afeyan, Ph.D.

          Name:   Noubar B. Afeyan, Ph.D.
          Title:   Manager


        NUTRITIONAL HEALTH LTP FUND GENERAL PARTNER LLC
          By:  

    /s/ Noubar B. Afeyan, Ph.D.

          Name:   Noubar B. Afeyan, Ph.D.
          Title:   Manager
        FLAGSHIP VENTURES OPPORTUNITIES FUND I, L.P.
        By:   Flagship Ventures Opportunities Fund I General Partner LLC
          By:  

    /s/ Noubar B. Afeyan, Ph.D.

          Name:   Noubar B. Afeyan, Ph.D.
          Title:   Manager
        FLAGSHIP VENTURES OPPORTUNITIES FUND I GENERAL PARTNER LLC
          By:  

    /s/ Noubar B. Afeyan, Ph.D.

          Name:   Noubar B. Afeyan, Ph.D.
          Title:   Manager
        FLAGSHIP VENTURES FUND 2007, L.P.
        By:   Flagship Ventures 2007 General Partner LLC
          By:  

    /s/ Noubar B. Afeyan, Ph.D.

          Name:   Noubar B. Afeyan, Ph.D.
          Title:   Manager
        FLAGSHIP VENTURES 2007 GENERAL PARTNER LLC
          By:  

    /s/ Noubar B. Afeyan, Ph.D.

          Name:   Noubar B. Afeyan, Ph.D.
          Title:   Manager
        CADENA LLC
          By:  

    /s/ Noubar B. Afeyan, Ph.D.

          Name:   Noubar B. Afeyan, Ph.D.
          Title:   Manager
       

    /s/ Noubar B. Afeyan, Ph.D.

        NOUBAR B. AFEYAN, PH.D.
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      Biotechnology: Biological Products (No Diagnostic Substances)
      Health Care
    • SEC Form EFFECT filed by Kaleido Biosciences Inc.

      EFFECT - Kaleido Biosciences, Inc. (0001751299) (Filer)

      5/2/22 12:15:14 AM ET
      $KLDO
      Biotechnology: Biological Products (No Diagnostic Substances)
      Health Care
    • SEC Form S-8 POS filed by Kaleido Biosciences Inc.

      S-8 POS - Kaleido Biosciences, Inc. (0001751299) (Filer)

      4/25/22 4:42:53 PM ET
      $KLDO
      Biotechnology: Biological Products (No Diagnostic Substances)
      Health Care

    $KLDO
    Press Releases

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    • Radius Health Announces Leadership Appointments

      BOSTON, March 16, 2022 (GLOBE NEWSWIRE) -- Radius Health, Inc. ("Radius" or the "Company") (NASDAQ:RDUS), today announced appointments to new roles on its executive leadership team, effective immediately. Mark Conley has joined Radius as the Company's Chief Financial Officer. In addition, Kim Clarke has been promoted to the General Counsel position. Both will report to Kelly Martin, the Chief Executive Officer. Mark Conley is a Certified Public Accountant with over 30 years of experience in publicly listed companies. His experience includes all aspects of finance including business unit accounting, regulatory, corporate books and records, budget processes, internal & external audit a

      3/16/22 8:30:00 AM ET
      $KLDO
      $RDUS
      Biotechnology: Biological Products (No Diagnostic Substances)
      Health Care
      Industrial Specialties
      Consumer Discretionary
    • Alltrna Appoints Rare Disease Clinical Research Expert, Dr. Anne Pariser, as Vice President, Medical and Regulatory Affairs

      CAMBRIDGE, Mass., Feb. 28, 2022 /PRNewswire/ -- Alltrna, a Flagship Pioneering company unlocking transfer RNA (tRNA) biology and pioneering tRNA therapeutics to regulate the protein universe and resolve disease, today announced the appointment of Anne Pariser, M.D., as Vice President, Medical and Regulatory Affairs. Prior to joining Alltrna, Dr. Pariser was the Director of the Office of Rare Diseases Research (ORDR) at the National Center for Advancing Translational Sciences (NCATS), National Institutes of Health (NIH), whose mission is to advance rare diseases research through a variety of research programs. Prior to ORDR, she worked at the U.S. Food and Drug Administration (FDA) Center for

      2/28/22 9:00:00 AM ET
      $AXLA
      $CDAK
      $DNLI
      $EVLO
      Biotechnology: Biological Products (No Diagnostic Substances)
      Health Care
      Medicinal Chemicals and Botanical Products
      Biotechnology: Pharmaceutical Preparations
    • INVAIO SCIENCES STRENGTHENS ITS BOARD OF DIRECTORS WITH THE APPOINTMENT OF HUGH GRANT

      CAMBRIDGE, Mass., Feb. 15, 2022 /PRNewswire/ -- Invaio Sciences, Inc., a Flagship Pioneering company focused on unlocking the potential of the planet's interdependent natural systems to solve pressing agricultural, sustainability, and environmental challenges, today announced the appointment of Hugh Grant to its Board of Directors. Grant brings nearly 40 years of agricultural and corporate leadership, including as Chairman, President, and Chief Executive Officer of the former Monsanto Company, a global provider of technology-based solutions and agricultural products. During h

      2/15/22 10:05:00 AM ET
      $AXLA
      $CDAK
      $DNLI
      $EVLO
      Biotechnology: Biological Products (No Diagnostic Substances)
      Health Care
      Medicinal Chemicals and Botanical Products
      Biotechnology: Pharmaceutical Preparations

    $KLDO
    FDA approvals

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    • September 7, 2021 - Coronavirus (COVID-19) Update: September 7, 2021

      For Immediate Release: September 07, 2021 The U.S. Food and Drug Administration today announced the following actions taken in its ongoing response effort to the COVID-19 pandemic: As part of the FDA’s effort to protect consumers, the agency issued a warning letter to Kaleido Biosciences, Inc. for not complying with federal laws and regulations, including laws and regulations to protect individuals participatin

      9/7/21 4:11:11 PM ET
      $KLDO
      Biotechnology: Biological Products (No Diagnostic Substances)
      Health Care

    $KLDO
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    • Chardan Capital reiterated coverage on Kaleido Biosciences with a new price target

      Chardan Capital reiterated coverage of Kaleido Biosciences with a rating of Buy and set a new price target of $3.00 from $11.00 previously

      1/31/22 9:22:16 AM ET
      $KLDO
      Biotechnology: Biological Products (No Diagnostic Substances)
      Health Care
    • Chardan Capital reiterated coverage on Kaleido Biosciences with a new price target

      Chardan Capital reiterated coverage of Kaleido Biosciences with a rating of Buy and set a new price target of $11.00 from $15.00 previously

      11/12/21 7:22:49 AM ET
      $KLDO
      Biotechnology: Biological Products (No Diagnostic Substances)
      Health Care
    • JMP Securities reiterated coverage on Kaleido Biosciences with a new price target

      JMP Securities reiterated coverage of Kaleido Biosciences with a rating of Market Outperform and set a new price target of $22.00 from $25.00 previously

      11/3/21 7:54:29 AM ET
      $KLDO
      Biotechnology: Biological Products (No Diagnostic Substances)
      Health Care

    $KLDO
    Leadership Updates

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    • Alltrna Appoints Rare Disease Clinical Research Expert, Dr. Anne Pariser, as Vice President, Medical and Regulatory Affairs

      CAMBRIDGE, Mass., Feb. 28, 2022 /PRNewswire/ -- Alltrna, a Flagship Pioneering company unlocking transfer RNA (tRNA) biology and pioneering tRNA therapeutics to regulate the protein universe and resolve disease, today announced the appointment of Anne Pariser, M.D., as Vice President, Medical and Regulatory Affairs. Prior to joining Alltrna, Dr. Pariser was the Director of the Office of Rare Diseases Research (ORDR) at the National Center for Advancing Translational Sciences (NCATS), National Institutes of Health (NIH), whose mission is to advance rare diseases research through a variety of research programs. Prior to ORDR, she worked at the U.S. Food and Drug Administration (FDA) Center for

      2/28/22 9:00:00 AM ET
      $AXLA
      $CDAK
      $DNLI
      $EVLO
      Biotechnology: Biological Products (No Diagnostic Substances)
      Health Care
      Medicinal Chemicals and Botanical Products
      Biotechnology: Pharmaceutical Preparations
    • INVAIO SCIENCES STRENGTHENS ITS BOARD OF DIRECTORS WITH THE APPOINTMENT OF HUGH GRANT

      CAMBRIDGE, Mass., Feb. 15, 2022 /PRNewswire/ -- Invaio Sciences, Inc., a Flagship Pioneering company focused on unlocking the potential of the planet's interdependent natural systems to solve pressing agricultural, sustainability, and environmental challenges, today announced the appointment of Hugh Grant to its Board of Directors. Grant brings nearly 40 years of agricultural and corporate leadership, including as Chairman, President, and Chief Executive Officer of the former Monsanto Company, a global provider of technology-based solutions and agricultural products. During h

      2/15/22 10:05:00 AM ET
      $AXLA
      $CDAK
      $DNLI
      $EVLO
      Biotechnology: Biological Products (No Diagnostic Substances)
      Health Care
      Medicinal Chemicals and Botanical Products
      Biotechnology: Pharmaceutical Preparations
    • Senda Biosciences Appoints Stuart Milstein, Ph.D., as SVP and Head of Platform Biology

      CAMBRIDGE, Mass., Jan. 26, 2022 /PRNewswire/ -- Senda Biosciences, Inc., a company that is harnessing nature to program targeted, potent and tunable medicines, has appointed Stuart Milstein, Ph.D., to the newly created position of Senior Vice President and Head of Platform Biology. Dr. Milstein most recently served as the Vice President of platform biology at Korro Bio, Inc., and previously led the RNAi Lead Development group at Alnylam Pharmaceuticals, Inc. Dr. Milstein will be responsible for advancing Senda's platform and scaling the Company's efforts to unlock a new class of fully programmable medicines.

      1/26/22 9:31:00 AM ET
      $AXLA
      $CDAK
      $DNLI
      $EVLO
      Biotechnology: Biological Products (No Diagnostic Substances)
      Health Care
      Medicinal Chemicals and Botanical Products
      Biotechnology: Pharmaceutical Preparations