Butterfly Network (NYSE: BFLY) holder files to sell 452,729 shares under Rule 144

Rhea-AI Filing Summary

A holder of Butterfly Network Inc. common stock has filed a notice of intent to sell 452,729 shares through broker Jefferies on the NYSE, with an aggregate market value of $1,874,252.78. The filing states that 226,200,000 common shares are outstanding; this is a baseline figure, not the amount being sold. The seller acquired these 452,729 shares in a private purchase from Butterfly Network Inc. on 08/31/2014, paid in cash. The notice also lists multiple prior sales of Butterfly Network common stock over the past three months by the same seller, each with specified share amounts, dates, and gross proceeds.

Insights

Insider transactions and ownership analyst

Large Rule 144 sale notice, but limited direct implications for Butterfly Network’s business.

The filing shows a holder of Butterfly Network Inc. common stock intends to sell 452,729 shares through Jefferies on the NYSE, with an aggregate market value of $1,874,252.78. The shares come from a cash, private purchase from Butterfly Network Inc. dated 08/31/2014, which indicates they have been held for a long period before this planned sale.

The document also lists a series of recent sales of Butterfly Network common stock over roughly three months, including transactions such as 1,110,579 shares sold on 11/24/2025 for gross proceeds of $3,503,032.70 and 769,327 shares sold on 12/08/2025 for $2,517,776.00. These are sales by an existing holder rather than new issuance by the company, so they do not directly change the company’s capital raised. The impact on investors depends mainly on how the market absorbs these shares, while the company’s operations and financial results are not addressed in this notice.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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
Common	Jefferies 520 Madison Ave New York NY 10022	452729	1874252.78	226200000	01/07/2026	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 *
Common	08/31/2014	Private purchase from the company	Butterfly Network Inc			452729	08/31/2014	Cash

* 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
Dr. Jonathan Rothberg 530 Old Whitefield St Guilford CT 06437	Common	11/03/2025	100502	309361.24
Dr. Jonathan Rothberg 530 Old Whitefield St Guilford CT 06437	Common	11/24/2025	1110579	3503032.70
Dr. Jonathan Rothberg 530 Old Whitefield St Guilford CT 06437	Common	11/25/2025	674758	2206728.56
Dr. Jonathan Rothberg 530 Old Whitefield St Guilford CT 06437	Common	11/26/2025	442539	1383598.00
Dr. Jonathan Rothberg 530 Old Whitefield St Guilford CT 06437	Common	11/28/2025	132570	408196.00
Dr. Jonathan Rothberg 530 Old Whitefield St Guilford CT 06437	Common	12/04/2025	64198	197473.00
Dr. Jonathan Rothberg 530 Old Whitefield St Guilford CT 06437	Common	12/05/2025	37598	115591.00
Dr. Jonathan Rothberg 530 Old Whitefield St Guilford CT 06437	Common	12/08/2025	769327	2517776.00
Dr. Jonathan Rothberg 530 Old Whitefield St Guilford CT 06437	Common	12/09/2025	176070	546767.00
Dr. Jonathan Rothberg 530 Old Whitefield St Guilford CT 06437	Common	12/10/2025	288918	905237.00
Dr. Jonathan Rothberg 530 Old Whitefield St Guilford CT 06437	Common	12/11/2025	123354	380127.00
Dr. Jonathan Rothberg 530 Old Whitefield St Guilford CT 06437	Common	12/12/2025	193293	596270.00
Dr. Jonathan Rothberg 530 Old Whitefield St Guilford CT 06437	Common	12/15/2025	601308	1902658.00
Dr. Jonathan Rothberg 530 Old Whitefield St Guilford CT 06437	Common	12/16/2025	284986	893830.00
Dr. Jonathan Rothberg 530 Old Whitefield St Guilford CT 06437	Common	12/23/2025	44781	179424.00
Dr. Jonathan Rothberg 530 Old Whitefield St Guilford CT 06437	Common	12/24/2025	2673	10692.00
Dr. Jonathan Rothberg 530 Old Whitefield St Guilford CT 06437	Common	12/26/2025	14911	59790.00
Dr. Jonathan Rothberg 530 Old Whitefield St Guilford CT 06437	Common	01/06/2026	351617	1416805.00

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the latest Form 144 for BFLY disclose?

The notice discloses that a holder of Butterfly Network Inc. (BFLY) common stock plans to sell 452,729 shares through Jefferies on the NYSE, with an aggregate market value of $1,874,252.78.

How many Butterfly Network (BFLY) shares are being proposed for sale under this Form 144?

The filing states that 452,729 shares of Butterfly Network Inc. common stock are proposed to be sold.

What is the reported aggregate market value of the BFLY shares to be sold?

The aggregate market value of the 452,729 Butterfly Network common shares to be sold is listed as $1,874,252.78.

On which exchange and through which broker will the BFLY shares be sold?

The filing identifies Jefferies as the broker and names the NYSE as the securities exchange for the planned sale of Butterfly Network common stock.

How and when were the Butterfly Network (BFLY) shares being sold originally acquired?

The 452,729 Butterfly Network common shares were acquired on 08/31/2014 in a private purchase from the company, with the consideration paid in cash.

Does the Form 144 show other recent sales of Butterfly Network (BFLY) stock by the same seller?

Yes. The notice lists multiple sales of Butterfly Network common stock over the past three months by the same seller, each with specific dates, share amounts, and gross proceeds, such as 1,110,579 shares sold on 11/24/2025 and 769,327 shares sold on 12/08/2025.

How many Butterfly Network (BFLY) shares are reported as outstanding in the Form 144?

The document reports that there are 226,200,000 shares of Butterfly Network common stock outstanding.