SC 13G/A

Names of Reporting Persons

Nathan D. Hukill

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

(a) ☒ (1) (b) ☐

SEC Use Only

Citizenship or Place of Organization

United States

SC 13G/A 1 d408738dsc13ga.htm SC 13G/A SC 13G/A

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

(Amendment No. 1)*

Avinger, Inc.

(Name of Issuer)

Common Stock, par value $0.001 per share

(Title of Class of Securities)

053734885

(CUSIP Number)

August 4, 2023

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

☐ Rule 13d-1(b)

☒ Rule 13d-1(c)

☐ Rule 13d-1(d)

*	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 the disclosures provided in a prior cover page.

The information required in 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 (“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. 053734885				Page 2 of 15

(1)	Nathan D. Hukill, CR Group L.P., CRG Partners III L.P., CRG Partners III Parallel Fund “A” L.P., CRG Partners III (Cayman) Unlev AIV I L.P., CRG Partners III (Cayman) Lev AIV I L.P., and CRG Partners III Parallel Fund “B” (Cayman) L.P. are members of a group for the purposes of this Schedule 13G.

(2)

This percentage is calculated based on 10,821,380 shares of Common Stock issued and outstanding as of July 21, 2023, as reported by the Issuer in its Quarterly Report on Form 10-Q for the quarter ended June 30, 2023, plus 2,684,160 shares of Common Stock issuable upon conversion of shares of Series E Convertible Preferred Stock of the Issuer that are beneficially owned by the Reporting Person.


CUSIP No. 053734885				Page 3 of 15

(1)	Nathan D. Hukill, CR Group L.P., CRG Partners III L.P., CRG Partners III Parallel Fund “A” L.P., CRG Partners III (Cayman) Unlev AIV I L.P., CRG Partners III (Cayman) Lev AIV I L.P., and CRG Partners III Parallel Fund “B” (Cayman) L.P. are members of a group for the purposes of this Schedule 13G.

(2)

This percentage is calculated based on 10,821,380 shares of Common Stock issued and outstanding as of July 21, 2023, as reported by the Issuer in its Quarterly Report on Form 10-Q for the quarter ended June 30, 2023, plus 2,684,160 shares of Common Stock issuable upon conversion of shares of Series E convertible preferred stock of the Issuer that are beneficially owned by the Reporting Person.


CUSIP No. 053734885				Page 4 of 15

(1)	Nathan D. Hukill, CR Group L.P., CRG Partners III L.P., CRG Partners III Parallel Fund “A” L.P., CRG Partners III (Cayman) Unlev AIV I L.P., CRG Partners III (Cayman) Lev AIV I L.P., and CRG Partners III Parallel Fund “B” (Cayman) L.P. are members of a group for the purposes of this Schedule 13G.

(2)

This percentage is calculated based on 10,821,380 shares of Common Stock issued and outstanding as of July 21, 2023, as reported by the Issuer in its Quarterly Report on Form 10-Q for the quarter ended June 30, 2023, plus 432,955 shares of Common Stock issuable upon conversion of shares of Series E convertible preferred stock of the Issuer that are beneficially owned by the Reporting Person.


CUSIP No. 053734885				Page 5 of 15

(1)	Nathan D. Hukill, CR Group L.P., CRG Partners III L.P., CRG Partners III Parallel Fund “A” L.P., CRG Partners III (Cayman) Unlev AIV I L.P., CRG Partners III (Cayman) Lev AIV I L.P., and CRG Partners III Parallel Fund “B” (Cayman) L.P. are members of a group for the purposes of this Schedule 13G.

(2)

This percentage is calculated based on 10,821,380 shares of Common Stock issued and outstanding as of July 21, 2023, as reported by the Issuer in its Quarterly Report on Form 10-Q for the quarter ended June 30, 2023, plus 232,179 shares of Common Stock issuable upon conversion of shares of Series E convertible preferred stock of the Issuer that are beneficially owned by the Reporting Person.


CUSIP No. 053734885				Page 6 of 15

(1)	Nathan D. Hukill, CR Group L.P., CRG Partners III L.P., CRG Partners III Parallel Fund “A” L.P., CRG Partners III (Cayman) Unlev AIV I L.P., CRG Partners III (Cayman) Lev AIV I L.P., and CRG Partners III Parallel Fund “B” (Cayman) L.P. are members of a group for the purposes of this Schedule 13G.

(2)

This percentage is calculated based on 10,821,380 shares of Common Stock issued and outstanding as of July 21, 2023, as reported by the Issuer in its Quarterly Report on Form 10-Q for the quarter ended June 30, 2023, plus 74,619 shares of Common Stock issuable upon conversion of shares of Series E convertible preferred stock of the Issuer that are beneficially owned by the Reporting Person.


CUSIP No. 053734885				Page 7 of 15

(1)	Nathan D. Hukill, CR Group L.P., CRG Partners III L.P., CRG Partners III Parallel Fund “A” L.P., CRG Partners III (Cayman) Unlev AIV I L.P., CRG Partners III (Cayman) Lev AIV I L.P., and CRG Partners III Parallel Fund “B” (Cayman) L.P. are members of a group for the purposes of this Schedule 13G.

(2)

This percentage is calculated based on 10,821,380 shares of Common Stock issued and outstanding as of July 21, 2023, as reported by the Issuer in its Quarterly Report on Form 10-Q for the quarter ended June 30, 2023, plus 920,130 shares of Common Stock issuable upon conversion of shares of Series E convertible preferred stock of the Issuer that are beneficially owned by the Reporting Person.


CUSIP No. 053734885				Page 8 of 15

(1)	Nathan D. Hukill, CR Group L.P., CRG Partners III L.P., CRG Partners III Parallel Fund “A” L.P., CRG Partners III (Cayman) Unlev AIV I L.P., CRG Partners III (Cayman) Lev AIV I L.P., and CRG Partners III Parallel Fund “B” (Cayman) L.P. are members of a group for the purposes of this Schedule 13G.

(2)

This percentage is calculated based on 10,821,380 shares of Common Stock issued and outstanding as of July 21, 2023, as reported by the Issuer in its Quarterly Report on Form 10-Q for the quarter ended June 30, 2023, plus 1,024,275 shares of Common Stock issuable upon conversion of shares of Series E convertible preferred stock of the Issuer that are beneficially owned by the Reporting Person.


CUSIP No. 053734885				Page 9 of 15


Item 1.

	(a)	Name of Issuer Avinger, Inc.

	(b)	Address of Issuer ’s Principal Executive Offices 400 Chesapeake Drive, Redwood City, CA 94063

Item 2.

	(a)	Name of Person Filing This Schedule 13G is filed jointly by the following persons (each a “Reporting Person” and collectively, the “Reporting Persons”): Nathan D. Hukill CR Group L.P. CRG Partners III L.P. CRG Partners III Parallel Fund “A” L.P. CRG Partners III (Cayman) Unlev AIV I L.P. CRG Partners III (Cayman) Lev AIV I L.P. CRG Partners III Parallel Fund “B” (Cayman) L.P.

		CR Group L.P. may be deemed to beneficially own the shares by virtue of its position as the investment manager for CRG Partners III L.P., CRG Partners III Parallel Fund “A” L.P., CRG Partners III (Cayman) Unlev AIV I L.P., CRG Partners III (Cayman) Lev AIV I L.P. and CRG Partners III Parallel Fund “B” (Cayman) L.P. Mr. Hukill may be deemed to have beneficial ownership over the securities by virtue of his indirect control of CR Group L.P.

	(b)	Address of Principal Business Office or, if none, Residence The address of the principal business office of each of the Reporting Persons is 1000 Main Street, Suite 2500, Houston, TX 77002.

	(c)	Citizenship See Row 4 of the cover page for each Reporting Person.

	(d)	Title of Class of Securities Common Stock, par value $0.001 per share

	(e)	CUSIP Number 053734885

Item 3.	If this statement is filed pursuant to §§240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:

	Not applicable


CUSIP No. 053734885				Page 10 of 15


Item 4.	Ownership

	(a)	Amount beneficially owned:

		Nathan D. Hukill	2,684,160 (1)

		CR Group L.P.	2,684,160 (1)

		CRG Partners III L.P.	432,955.008 (1)

		CRG Partners III Parallel Fund “A” L.P.	232,179.84 (1)

		CRG Partners III (Cayman) Unlev AIV I L.P.	74,619.648 (1)

		CRG Partners III (Cayman) Lev AIV I L.P.	920,130.048 (1)

		CRG Partners III Parallel Fund “B” (Cayman) L.P.	1,024,275.456 (1)

	(b)	Percent of class:

		Nathan D. Hukill	19.9% (2)

		CR Group L.P.	19.9% (2)

		CRG Partners III L.P.	3.8% (2)

		CRG Partners III Parallel Fund “A” L.P.	2.1% (2)

		CRG Partners III (Cayman) Unlev AIV I L.P.	0.7% (2)

		CRG Partners III (Cayman) Lev AIV I L.P.	7.8% (2)

		CRG Partners III Parallel Fund “B” (Cayman) L.P.	8.6% (2)

	(c)	Number of shares as to which the person has:

		(i) Sole power to vote or to direct the vote:

		Nathan D. Hukill	0

		CR Group L.P.	0

		CRG Partners III L.P.	0

		CRG Partners III Parallel Fund “A” L.P.	0

		CRG Partners III (Cayman) Unlev AIV I L.P. CRG Partners III (Cayman) Lev AIV I L.P.	0 0

		CRG Partners III Parallel Fund “B” (Cayman) L.P.	0

		(ii) Shared power to vote or to direct the vote:

		Nathan D. Hukill	2,684,160 (1)

		CR Group L.P.	2,684,160 (1)

		CRG Partners III L.P.	432,955.008 (1)

		CRG Partners III Parallel Fund “A” L.P.	232,179.84 (1)

		CRG Partners III (Cayman) Unlev AIV I L.P.	74,619.648 (1)

		CRG Partners III (Cayman) Lev AIV I L.P.	920,130.048 (1)

		CRG Partners III Parallel Fund “B” (Cayman) L.P.	1,024,275.456 (1)


CUSIP No. 053734885				Page 11 of 15



		(iii) Sole power to dispose or to direct the disposition of:

		Nathan D. Hukill	0

		CR Group L.P.	0

		CRG Partners III L.P.	0

		CRG Partners III Parallel Fund “A” L.P.	0

		CRG Partners III (Cayman) Unlev AIV I L.P. CRG Partners III (Cayman) Lev AIV I L.P.	0 0

		CRG Partners III Parallel Fund “B” (Cayman) L.P.	0

		(iv) Shared power to dispose or to direct the disposition of:

		Nathan D. Hukill	2,684,160 (1)

		CR Group L.P.	2,684,160 (1)

		CRG Partners III L.P.	432,955.008 (1)

		CRG Partners III Parallel Fund “A” L.P.	232,179.84 (1)

		CRG Partners III (Cayman) Unlev AIV I L.P.	74,619.648 (1)

		CRG Partners III (Cayman) Lev AIV I L.P.	920,130.048 (1)

		CRG Partners III Parallel Fund “B” (Cayman) L.P.	1,024,275.456 (1)

	(1)	Consists of shares of Common Stock issuable upon conversion of shares of Series E Convertible Preferred Stock.

	(2)	This percentage is calculated based on 10,821,380 shares of Common Stock issued and outstanding as of July 21, 2023, as reported by the Issuer in its Quarterly Report on Form 10-Q for the quarter ended June 30, 2023, plus shares of Common Stock issuable upon conversion of shares of Series E Convertible Preferred Stock of the Issuer that are beneficially owned by the Reporting Person.

Item 5.	Ownership of Five Percent or Less of a Class

	If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following ☐

Item 6.	Ownership of More than Five Percent on Behalf of Another Person

	Not applicable

Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person

	Not applicable


CUSIP No. 053734885				Page 12 of 15


Item 8.		Identification and Classification of Members of the Group

		Not applicable

Item 9.		Notice of Dissolution of Group

		Not applicable

Item 10.		Certification

		By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having such purpose or effect.


CUSIP No. 053734885				Page 13 of 15

SIGNATURE

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: August 14, 2023

Nathan D. Hukill

/s/ Nathan D. Hukill

An individual

CR Group L.P.

CRG Partners III L.P.

CRG Partners III Parallel Fund “A” L.P.

CRG Partners III (Cayman) Unlev AIV I L.P.

CRG Partners III (Cayman) Lev AIV I L.P.

CRG Partners III Parallel Fund “B” (Cayman) L.P.


By:		/s/ Nathan D. Hukill
		Nathan D. Hukill, authorized signatory


CUSIP No. 053734885				Page 14 of 15

EXHIBITS


A:		Joint Filing Agreement

SEC Form SC 13G/A filed by Avinger Inc. (Amendment)