SEC FORM 4

SEC FORM 4SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Dinu Raluca

(Last)

(First)

(Middle)

C/O QT IMAGING HOLDINGS, INC.

3 HAMILTON LANDING SUITE 160

(Street)

NOVATO

CALIFORNIA

94949

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
QT IMAGING HOLDINGS, INC. [ QTI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	Chief Executive Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/20/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock								389,345⁽¹⁾	D
Common Stock	03/20/2026		A		3,500⁽²⁾	A	$0.00	392,845	D
Common Stock	03/20/2026		A		500,000⁽³⁾	A	$0.00	892,845	D
Common Stock	03/20/2026		A		16,000⁽⁴⁾	A	$0.00	908,845	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. The number of shares beneficially owned reflects the 3-for-1 reverse stock split effected October 23, 2025.

2. Subject to the Reporting Person's continued service to QT Imaging Holdings, Inc. (the "Company"), twenty-five percent of this Restricted Stock Unit will vest on each of May 15, 2026, August 15, 2026, November 15, 2026, and February 15, 2027; all shares under this Restricted Stock Unit shall immediately vest in the event of a Change of Control (as defined in the QT Imaging Holdings, Inc. 2024 Equity Incentive Plan) of the Company.

3. Subject to the Reporting Person's continued service to the Company, the Restricted Stock Unit shall vest quarterly over sixteen equal quarterly installments beginning on May 15, 2026 and on each subsequent August 15, November 15, February 15, and May 15, such that the grant will be fully vested on February 15, 2030; all shares under this Restricted Stock Unit shall immediately vest in the event of a Change of Control (as defined in the QT Imaging Holdings, Inc. 2024 Equity Incentive Plan) of the Company.

4. Subject to the Reporting Person's continued service to the Company, one-third of this Restricted Stock Unit will vest on May 15, 2027, and the remaining two-thirds will vest in eight equal quarterly installments on each subsequent August 15, November 15, February 15, and May 15, such that the grant will be fully vested on May 15, 2029; all shares under this Restricted Stock Unit shall immediately vest in the event of a Change of Control (as defined in the QT Imaging Holdings, Inc. 2024 Equity Incentive Plan) of the Company.

	/s/ Dr. Raluca Dinu	03/24/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)