Butterfly Network (BFLY) director details estate-planning stock sales

Rhea-AI Filing Summary

Butterfly Network director and 10% owner Jonathan M. Rothberg, Ph.D. reported sales of Class A common stock executed under a Rule 10b5‑1 trading plan. The plan was adopted on March 5, 2025 for estate planning purposes. Reported transactions included a sale of 601,308 Class A shares on December 15, 2025 at a weighted average price of $3.1642 per share, followed on December 16, 2025 by sales of 50,360, 196,662 and 37,964 Class A shares at a weighted average price of $3.1364 per share. The prices reflected ranges from $3.07 to $3.2373 and from $3.07 to $3.265 per share. After these trades, the report shows continued holdings of Butterfly Network stock directly and indirectly through family trusts and holding entities, including 1,202,545 Class A shares through JAR TR, LLC, 2,880,252 Class A shares held directly, 726,696 Class A shares held by his spouse, and multiple blocks of Class B common stock held via several 4C Holdings and trust entities.

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).

X

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^*

ROTHBERG JONATHAN M

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
12/15/2025

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	12/15/2025		S(1)		601,308	D	$3.1642(2)	196,662	I	By NVR TR, LLC(3)
Class A Common Stock	12/16/2025		S(1)		50,360	D	$3.1364(4)	0	I	By EJR TR, LLC(3)
Class A Common Stock	12/16/2025		S(1)		196,662	D	$3.1364(4)	0	I	By NVR TR, LLC(3)
Class A Common Stock	12/16/2025		S(1)		37,964	D	$3.1364(4)	1,202,545	I	By JAR TR, LLC(3)
Class A Common Stock								2,880,252	D
Class A Common Stock								726,696	I	By Bonnie E Gould Rothberg MD(3)
Class B Common Stock								4,716,596	I	By 4C Holdings I, LLC(3)
Class B Common Stock								2,621,701	I	By 4C Holdings II, LLC(3)
Class B Common Stock								2,621,701	I	By 4C Holdings III, LLC(3)
Class B Common Stock								2,621,701	I	By 4C Holdings IV, LLC(3)
Class B Common Stock								8,845,238	I	By 4C Holdings V, LLC(3)
Class B Common Stock								1,250,000	I	By NVR TR, LLC(3)
Class B Common Stock								1,250,000	I	By JNR TR, LLC(3)
Class B Common Stock								1,250,000	I	By GBR TR, LLC(3)
Class B Common Stock								1,250,000	I	By EJR TR, LLC(3)

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. The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 5, 2025 for estate planning purposes.

2. Represents the weighted average sales price per share. The shares sold at prices ranging from $3.07 to $3.2373 per share. Full information regarding the number of shares sold at each price shall be provided upon request to the staff of the U.S. Securities and Exchange Commission, the Issuer, or a security holder of the Issuer.

3. Dr. Rothberg is the Manager of 4C Holdings I, LLC, 4C Holdings II, LLC, 4C Holdings III, LLC, 4C Holdings IV, LLC, 4C Holdings V, LLC, NVR TR, LLC, JNR TR, LLC, JAR TR, LLC, GBR TR, LLC and EJR TR, LLC, and is the spouse of Bonnie E Gould Rothberg MD. Dr. Rothberg disclaims beneficial ownership of the securities held by these persons and entities except to the extent of his pecuniary interest therein.

4. Represents the weighted average sales price per share. The shares sold at prices ranging from $3.07 to $3.265 per share. Full information regarding the number of shares sold at each price shall be provided upon request to the staff of the U.S. Securities and Exchange Commission, the Issuer, or a security holder of the Issuer.

	/s/ Jonathan M. Rothberg, Ph.D.	12/17/2025
	** 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 stock sales did Jonathan M. Rothberg report for Butterfly Network (BFLY)?

The report shows that Jonathan M. Rothberg, Ph.D. sold Class A common stock, including 601,308 shares on December 15, 2025 at a weighted average price of $3.1642 per share, and on December 16, 2025 sold blocks of 50,360, 196,662 and 37,964 shares at a weighted average price of $3.1364 per share.

On what dates did the Butterfly Network (BFLY) insider transactions occur?

The earliest reported transaction date is December 15, 2025, when 601,308 Class A shares were sold, followed by additional Class A share sales on December 16, 2025.

At what prices were the Butterfly Network (BFLY) shares sold by Jonathan Rothberg?

One sale had a weighted average price of $3.1642 per share, with shares sold between $3.07 and $3.2373. The December 16, 2025 sales had a weighted average price of $3.1364 per share, with shares sold between $3.07 and $3.265 per share.

Were the Butterfly Network (BFLY) insider sales made under a Rule 10b5-1 trading plan?

Yes. The transactions were effected pursuant to a Rule 10b5‑1 trading plan adopted by the reporting person on March 5, 2025 for estate planning purposes.

What is Jonathan Rothberg’s relationship to Butterfly Network (BFLY)?

The report identifies Jonathan M. Rothberg, Ph.D. as both a Director and a 10% Owner of Butterfly Network, Inc.

How many Butterfly Network (BFLY) shares are reported as held after the transactions?

Following the reported sales, the filing lists holdings including 1,202,545 Class A shares indirectly through JAR TR, LLC, 2,880,252 Class A shares held directly, 726,696 Class A shares indirectly by Bonnie E Gould Rothberg MD, and multiple blocks of Class B common stock held indirectly through various 4C Holdings and trust entities.

Does Jonathan Rothberg disclaim beneficial ownership of some Butterfly Network (BFLY) shares?

Yes. The notes state that Dr. Rothberg is the manager of several 4C Holdings entities and trusts and is the spouse of Bonnie E Gould Rothberg MD, and that he disclaims beneficial ownership of the securities held by these persons and entities except to the extent of his pecuniary interest.