144: Filer Information

Filer CIK

0001727640

Filer CCC

XXXXXXXX

Is this a LIVE or TEST Filing?

LIVE

TEST

Submission Contact Information

Name

Phone

E-Mail Address

144: Issuer Information

Name of Issuer

UNITY BIOTECHNOLOGY, INC.

SEC File Number

001-38470

Address of Issuer

285 East Grand Ave.
South San Francisco
CALIFORNIA
94080

Phone

(650)-416-1192

Name of Person for Whose Account the Securities are To Be Sold

Sullivan Lynne Marie

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

Officer

144: Securities Information

Title of the Class of Securities To Be Sold

Name and Address of the Broker

Number of Shares or Other Units To Be Sold

Aggregate Market Value

Number of Shares or Other Units Outstanding

Approximate Date of Sale

Name the Securities Exchange

Common Stock

Muriel Siebert & Co., LLC
18045 Oak Street
Omaha � NE � 68130

21867

22422.42

98905

04/02/2025

NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class

Date you Acquired

Nature of Acquisition Transaction

Name of Person from Whom Acquired

Is this a Gift?

Date Donor Acquired

Amount of Securities Acquired

Date of Payment

Nature of Payment *

Common Stock

03/28/2025

Restricted Stock Units granted in 2025 under the Issuer's 2018 Incentive Award Plan

UNITY Biotechnology, Inc.

21867

03/28/2025

N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller

Title of Securities Sold

Date of Sale

Amount of Securities Sold

Gross Proceeds

Lynne Marie Sullivan
C/O UNITY BIOTECHNOLOGY, INC.
285 East Grand Avenue
South San Francisco � CA � 94080

Restricted Stock Units granted in 2022 under the Issuer's 2018 Incentive Award Plan

02/04/2025

153

341.19

144: Remarks and Signature

Remarks

1. Share number reflects post-split units after 1-for-10 reverse stock split as of 10/19/22.

Date of Notice

04/03/2025

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

/s/ Alexander Nguyen as attorney-in-fact for Lynne Sullivan pursuant to Power of Attorney

SEC Form 144 filed by Unity Biotechnology Inc.