BFLY insider plans sale of 48,540 Class A shares

BFLY insider Victor Ku filed to sell 48,540 Class A shares on or after 07/20/2026 through Fidelity Brokerage Services on the NYSE, with an indicated value of $318,412.69.

Rhea-AI Filing Summary

BFLY insider Victor Ku filed to sell 48,540 Class A shares on or after 07/20/2026 through Fidelity Brokerage Services on the NYSE, with an indicated value of $318,412.69. These shares were acquired via restricted stock vesting on 07/17/2026 as compensation from the issuer, following an earlier sale of 35,649 Class A shares for $280,668.14 on 07/07/2026.

Key Figures

Planned shares to be sold: 48,540 Class A shares Planned sale value: $318,412.69 Shares sold in past 3 months: 35,649 Class A shares +2 more

5 metrics

Planned shares to be sold 48,540 Class A shares Securities to be sold on or after 07/20/2026

Planned sale value $318,412.69 Indicated value for 48,540 Class A shares

Shares sold in past 3 months 35,649 Class A shares Sale on 07/07/2026 reported in past 3 months section

Proceeds from prior sale $280,668.14 Total consideration for 35,649 shares sold on 07/07/2026

Vesting date 07/17/2026 Restricted stock vesting date for 48,540 Class A shares

Key Terms

Restricted Stock Vesting, Compensation, Securities To Be Sold, Securities Sold During The Past 3 Months

4 terms

Restricted Stock Vesting financial

"Class A | 07/17/2026 | 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.

Compensation financial

"48540 | 07/17/2026 | Compensation"

Securities To Be Sold regulatory

"144: Securities To Be Sold"

Securities Sold During The Past 3 Months regulatory

"144: Securities Sold During The Past 3 Months"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider share sale is disclosed for BFLY in this Form 144?

Victor Ku plans to sell 48,540 Class A shares of BFLY. The planned sale is routed through Fidelity Brokerage Services on or after 07/20/2026, with an indicated value of $318,412.69.

How were the BFLY shares to be sold by Victor Ku acquired?

The 48,540 Class A shares were acquired through restricted stock vesting on 07/17/2026. The vesting is listed as compensation from the issuer, indicating an equity-based compensation award converting into freely tradable shares.

What prior BFLY share sales by Victor Ku are reported in the past 3 months?

The filing reports a prior sale of 35,649 Class A shares of BFLY on 07/07/2026 for total proceeds of $280,668.14. This transaction is listed under securities sold during the past three months.

Through which broker and market are the BFLY shares expected to be sold?

The planned sale of 48,540 Class A shares is indicated through Fidelity Brokerage Services LLC. The filing notes trading on the NYSE, specifying the market venue for the contemplated transactions.

What does restricted stock vesting mean in the BFLY insider’s context?

Restricted stock vesting means previously granted restricted BFLY shares became fully owned on 07/17/2026. After vesting, Victor Ku can sell the 48,540 Class A shares, subject to applicable securities rules such as Form 144 requirements.

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Accepted by SEC EDGAR 07/20/2026 - 03:10 PM EDT 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	0002087062
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	Ku Victor
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	48540	318412.69	234842768	07/20/2026	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	07/17/2026	Restricted Stock Vesting	Issuer			48540	07/17/2026	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
Victor Ku 1600 District Avenue Burlington MA 01803	Class A	07/07/2026	35649	280668.14

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	07/20/2026
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/Wade Moss, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Victor Ku
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)