Butterfly Network (BFLY) director receives 25,447-share RSU board grant

Rhea-AI Filing Summary

Phanstiel S. Louise reported acquisition or exercise transactions in this Form 4 filing.

Butterfly Network, Inc. director S. Louise Phanstiel reported an equity compensation grant in the form of restricted stock units (RSUs). She received 25,447 RSUs of Class A common stock at no cash cost, characterized as a grant or award rather than an open-market purchase.

The RSUs constitute her annual grant to nonemployee directors under the company’s Amended and Restated Nonemployee Director Compensation Policy and vest in full on the date of the issuer’s 2027 Annual Stockholders Meeting, subject to her continued Board service. Following this grant, she holds 390,952 Class A shares directly, while a separate trust, The Phanstiel Trust u/a/d 2/5/02, holds 185,261 shares indirectly.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Phanstiel S. Louise

Role null

Type	Security	Shares	Price	Value
Grant/Award	Class A Common Stock	25,447	$0.00	--
holding	Class A Common Stock	--	--	--

Holdings After Transaction: Class A Common Stock — 390,952 shares (Direct, null); Class A Common Stock — 185,261 shares (Indirect, By The Phanstiel Trust u/a/d 2/5/02)

Footnotes (1)

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Key Figures

RSU grant size: 25,447 shares Grant price: $0.00 per share Direct holdings after grant: 390,952 shares +2 more

5 metrics

RSU grant size 25,447 shares Annual nonemployee director RSU award

Grant price $0.00 per share Equity compensation, not a cash purchase

Direct holdings after grant 390,952 shares Class A common stock directly held post-transaction

Indirect trust holdings 185,261 shares Held by The Phanstiel Trust u/a/d 2/5/02

Vesting event 2027 Annual Stockholders Meeting RSUs vest in full on this meeting date

Key Terms

restricted stock units ("RSUs"), Nonemployee Director Compensation Policy, Annual Stockholders Meeting, Class A common stock

4 terms

restricted stock units ("RSUs") financial

"Consists of restricted stock units ("RSUs"). Each RSU represents the right to receive one share..."

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

Nonemployee Director Compensation Policy financial

"annual grant to nonemployee directors pursuant to the Issuer's Amended and Restated Nonemployee Director Compensation Policy..."

Annual Stockholders Meeting financial

"The RSUs vest in full on the date of the Issuer's 2027 Annual Stockholders Meeting..."

Class A common stock financial

"Each RSU represents the right to receive one share of Class A common stock upon vesting."

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

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Form 4 Insider Transactions: What Each Field Means →

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Phanstiel S. Louise

(Last) (First) (Middle)

C/O BUTTERFLY NETWORK, INC.

1600 DISTRICT AVENUE

(Street)

BURLINGTON MASSACHUSETTS 01803

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/22/2026

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)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	06/22/2026		A		25,447(1)	A	$0.00	390,952	D
Class A Common Stock								185,261	I	By The Phanstiel Trust u/a/d 2/5/02

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 were issued to the Reporting Person as the annual grant to nonemployee directors pursuant to the Issuer's Amended and Restated Nonemployee Director Compensation Policy for services to be rendered to the Issuer as a member of its Board of Directors. The RSUs vest in full on the date of the Issuer's 2027 Annual Stockholders Meeting, subject to the Reporting Person's continued service on the Board of Directors on such date.

	/s/ Nick Caezza, Attorney-in-Fact	06/22/2026
	** 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)

FAQ

What did Butterfly Network (BFLY) director S. Louise Phanstiel report on this Form 4?

She reported receiving a grant of restricted stock units representing 25,447 shares of Class A common stock. The award is equity compensation for her role as a nonemployee director on Butterfly Network’s Board of Directors, not an open-market stock purchase or sale.

How many Butterfly Network (BFLY) shares does S. Louise Phanstiel hold after this RSU grant?

After the grant, she directly holds 390,952 shares of Class A common stock. In addition, 185,261 shares are held indirectly through The Phanstiel Trust u/a/d 2/5/02, giving investors a clearer picture of her reported equity exposure.

What are the terms of the 25,447 RSUs granted to Butterfly Network (BFLY) director Phanstiel?

The 25,447 RSUs each represent the right to receive one Class A share upon vesting. They were issued as her annual nonemployee director grant and will vest in full at the company’s 2027 Annual Stockholders Meeting, assuming she remains on the Board until that date.

Did S. Louise Phanstiel buy or sell Butterfly Network (BFLY) shares on the market?

No market buy or sell is reported. The Form 4 shows an award of 25,447 RSUs at a per-share price of $0.00, reflecting equity compensation rather than a cash transaction, plus a separate entry showing existing indirect holdings in a trust.

Why did Butterfly Network (BFLY) grant RSUs to S. Louise Phanstiel?

The RSUs were granted under Butterfly Network’s Amended and Restated Nonemployee Director Compensation Policy. They represent her annual equity compensation for services as a Board member, aligning director interests with shareholders through stock-based awards instead of only cash fees.

When will S. Louise Phanstiel’s Butterfly Network (BFLY) RSUs vest?

The 25,447 RSUs are scheduled to vest in full on the date of Butterfly Network’s 2027 Annual Stockholders Meeting. Vesting is conditioned on her continued service on the company’s Board of Directors through that meeting date, according to the disclosed terms.