Butterfly Network (BFLY) CTO granted 287,326 RSUs vesting from 2027

Rhea-AI Filing Summary

Ku Victor reported acquisition or exercise transactions in this Form 4 filing.

Butterfly Network, Inc. reported that Chief Technology Officer Victor Ku received a grant of 287,326 shares of Class A common stock in the form of restricted stock units. Each RSU equals one share and will vest in three equal annual installments starting on March 1, 2027, contingent on his continued service. Following this equity award, his directly held Class A common stock totaled 1,099,288 shares.

SEC 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^*

Ku Victor

(Last) (First) (Middle)

C/O BUTTERFLY NETWORK, INC.

1600 DISTRICT AVENUE

(Street)

BURLINGTON MA 01803

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Butterfly Network, Inc. [ BFLY ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
03/02/2026

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

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

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

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)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	03/02/2026		A		287,326(1)	A	$0	1,099,288	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Consists of restricted stock units ("RSUs"). Each RSU represents the right to receive one share of Class A Common Stock upon vesting. The RSUs vest in three equal annual installments beginning on March 1, 2027, subject to the Reporting Person's continued service on each such vesting date.

	/s/ Nick Caezza, Attorney-in-Fact	03/04/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider transaction did Butterfly Network (BFLY) report for Victor Ku?

Butterfly Network reported that Chief Technology Officer Victor Ku received a grant of 287,326 restricted stock units. Each RSU represents one share of Class A common stock, awarded at no cash cost as equity-based compensation.

How many Butterfly Network (BFLY) shares did the CTO hold after this Form 4 grant?

After the reported grant, Chief Technology Officer Victor Ku held 1,099,288 shares of Class A common stock. This total reflects his direct ownership following the 287,326-share restricted stock unit award disclosed in the Form 4 filing.

How do the Butterfly Network (BFLY) RSUs granted to the CTO vest?

The 287,326 restricted stock units granted to Butterfly Network’s CTO vest in three equal annual installments. Vesting begins on March 1, 2027, and each installment requires his continued service through the applicable vesting date to receive the shares.

What does the zero price per share mean in Victor Ku’s Butterfly Network Form 4?

The reported transaction price of $0.0000 per share indicates an equity award, not an open-market purchase. The 287,326 restricted stock units were granted as compensation, with no cash paid per share by the Chief Technology Officer.

What type of security was granted to Butterfly Network (BFLY) CTO Victor Ku?

Victor Ku received restricted stock units tied to Butterfly Network’s Class A common stock. Each RSU converts into one share upon vesting, aligning his compensation with future company performance and his continued service over the three-year vesting period.