Butterfly Network officer plans $1.0M stock sale

Officer Steven Cashman filed a Rule 144 notice to sell 140,112 Class A shares of Butterfly Network, Inc., including shares sold to cover tax obligations on vested equity.

Rhea-AI Filing Summary

Butterfly Network, Inc. (BFLY) had a notice filed for a proposed sale of Class A common stock under Rule 144 on behalf of officer Steven Cashman. The notice covers 140,112 Class A shares, acquired on September 3, 2026 through restricted stock vesting as compensation from the issuer.

The shares are to be sold through Fidelity Brokerage Services LLC, and the filing notes that the sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution. The notice also lists prior Rule 144 sales of Class A shares by Steven Cashman during the prior three months.

Key Figures

Shares to be sold: 140,112 Class A shares Aggregate market value of proposed sale: $1,023,055.79 Shares outstanding (context): 244,858,246 shares +4 more

7 metrics

Shares to be sold 140,112 Class A shares Proposed Rule 144 sale for officer Steven Cashman

Aggregate market value of proposed sale $1,023,055.79 Approximate market value of 140,112 Class A shares covered by the notice

Shares outstanding (context) 244,858,246 shares Class A shares outstanding referenced in the Form 144

Prior sale June 5, 2026 104,781 shares for $520,173.67 Class A shares sold by Steven Cashman in the last three months

Prior sale June 8, 2026 184,680 shares for $865,447.77 Class A shares sold by Steven Cashman in the last three months

Date of notice September 4, 2026 Filing date of the Rule 144 notice

Acquisition date of shares September 3, 2026 Date the 140,112 shares were acquired via restricted stock vesting

Key Terms

Rule 144, Restricted Stock Vesting, vested equity award distribution, attorney-in-fact

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Vesting financial

"Class A | 09/03/2026 | Restricted Stock Vesting | Issuer"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

vested equity award distribution financial

"resulting from the settlement of a vested equity award distribution."

attorney-in-fact regulatory

"as attorney-in-fact for Steven Cashman"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

What does the Form 144 filing disclose for Butterfly Network, Inc. (BFLY)?

The Form 144 discloses a proposed Rule 144 sale of 140,112 Class A shares of Butterfly Network, Inc. common stock for officer Steven Cashman, acquired on September 3, 2026 via restricted stock vesting as compensation from the issuer.

How many Butterfly Network (BFLY) shares are proposed to be sold under this Form 144?

The notice covers a proposed sale of 140,112 Class A shares of Butterfly Network, Inc. common stock. These shares were acquired as compensation through restricted stock vesting on September 3, 2026.

What is the approximate aggregate market value of the Butterfly Network (BFLY) shares in this Form 144?

The Form 144 lists an approximate aggregate market value of $1,023,055.79 for the 140,112 Class A shares of Butterfly Network, Inc. proposed for sale under Rule 144.

What prior sales by Steven Cashman in Butterfly Network (BFLY) stock are reported in the last three months?

The filing reports sales of 104,781 Class A shares for $520,173.67 on June 5, 2026, and 184,680 Class A shares for $865,447.77 on June 8, 2026, by Steven Cashman.

Why does the Form 144 mention taxes related to Butterfly Network (BFLY) shares?

The remarks state the sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution, indicating part of the sale relates to taxes on recently vested compensation shares.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/04/2026 - 03:47 PM Accepted by SEC EDGAR 09/04/2026 - 03:46 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0002035576
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Butterfly Network, Inc.
SEC File Number	001-39292
Address of Issuer	1600 DISTRICT AVENUE BURLINGTON MASSACHUSETTS 01803
Phone	781-557-4800
Name of Person for Whose Account the Securities are To Be Sold	Cashman Steve
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Class A	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	140112	1023055.79	244858246	09/04/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Class A	09/03/2026	Restricted Stock Vesting	Issuer			140112	09/03/2026	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Steven Cashman 1600 District Avenue Burlington MA 01803	Class A	06/05/2026	104781	520173.67
Steven Cashman 1600 District Avenue Burlington MA 01803	Class A	06/08/2026	184680	865447.77

144: Remarks and Signature

Remarks	Sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution.
Date of Notice	09/04/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Steven Cashman
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)