Butterfly Network holder details July 2026 share sales

Jonathan M. Rothberg, Ph.D., together with related entities, reports beneficial ownership of 828,775 shares of Butterfly Network, Inc. Class A common stock, representing 0.4% of that class based on 234,842,768 Class A shares outstanding as of April 20, 2026.

Rhea-AI Filing Summary

Jonathan M. Rothberg, Ph.D., together with related entities, reports beneficial ownership of 828,775 shares of Butterfly Network, Inc. Class A common stock, representing 0.4% of that class based on 234,842,768 Class A shares outstanding as of April 20, 2026. He also reports beneficial ownership of 25,213,303 shares of Class B common stock, representing 100% of that class based on Class B shares outstanding as of July 17, 2026.

The disclosure lists share sales made for estate-planning purposes under a Rule 10b5-1 trading plan entered into on March 13, 2026. On July 14, 2026, 815,632 Class A shares were sold at a weighted average price of $7.7178 per share; on July 15, 1,730,319 Class A shares at $7.3228; and on July 16, 253,867 Class A shares at $7.0889. On July 16, 1,213,634 Class B shares were sold at a weighted average price of $7.0889 per share, and the Class B stock automatically converted into Class A stock on a one-to-one basis upon sale.

Key Figures

Class A shares beneficially owned: 828,775 shares Class B shares beneficially owned: 25,213,303 shares Class A shares outstanding: 234,842,768 shares +5 more

8 metrics

Class A shares beneficially owned 828,775 shares Beneficial ownership of Butterfly Network Class A common stock; 0.4% of the class

Class B shares beneficially owned 25,213,303 shares Beneficial ownership of Butterfly Network Class B common stock; 100% of the class

Class A shares outstanding 234,842,768 shares Class A common stock outstanding as of April 20, 2026, used to calculate 0.4% ownership

Class A sale July 14, 2026 815,632 shares at $7.7178 Weighted average price per share for Class A shares sold on July 14, 2026

Class A sale July 15, 2026 1,730,319 shares at $7.3228 Weighted average price per share for Class A shares sold on July 15, 2026

Class A sale July 16, 2026 253,867 shares at $7.0889 Weighted average price per share for Class A shares sold on July 16, 2026

Class B sale July 16, 2026 1,213,634 shares at $7.0889 Class B shares sold at a weighted average price; converted to Class A upon sale

4C Holdings V, LLC Class B stake 8,845,238 shares (35.1%) Beneficial ownership of Class B common stock by 4C Holdings V, LLC

Key Terms

beneficially owned, Class B common stock, Rule 10b5-1 trading plan, estate planning

4 terms

beneficially owned financial

"Aggregate amount beneficially owned by each reporting person 828,775.00"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

Class B common stock financial

"This Reporting Person's table is for Class B common stock."

A class B common stock is one of multiple types of a company’s ordinary shares that carries specific rights—often different voting power or dividend priority—compared with other classes. For investors it matters because those differences affect how much influence you have over company decisions, the income you might receive, and how freely the shares trade; think of it like owning a car with different keys: some keys let you start the engine and open the trunk, others only unlock the door.

Rule 10b5-1 trading plan regulatory

"pursuant to a Rule 10b5-1 trading plan entered into on March 13, 2026."

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

estate planning financial

"All transactions below were effected ... in connection with estate planning"

A set of instructions and legal steps that decide who gets your money, property and other assets, and who will manage them if you become unable to do so. For investors it matters because thoughtful planning can reduce taxes and delays, protect heirs, and keep investments from being tied up in court—think of it as a clear map and emergency kit that preserves value and directs where assets go when you can’t.

FAQ

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

What ownership in Butterfly Network (BFLY) does Jonathan M. Rothberg report?

He reports beneficial ownership of 828,775 Class A shares, or 0.4% of that class, and 25,213,303 Class B shares, or 100% of that class, based on stated shares outstanding as of April 20 and July 17, 2026, respectively.

What Butterfly Network (BFLY) share sales were reported for July 2026?

Reported sales include 815,632 Class A shares at $7.7178 on July 14, 1,730,319 at $7.3228 on July 15, and 253,867 at $7.0889 on July 16, plus 1,213,634 Class B shares at $7.0889 on July 16, converted to Class A upon sale.

Were the July 2026 BFLY share sales made under a Rule 10b5-1 plan?

Yes. All the reported July 2026 Butterfly Network share transactions were carried out "in connection with estate planning" and "pursuant to a Rule 10b5-1 trading plan" that was entered into on March 13, 2026.

How many Butterfly Network (BFLY) Class A shares are outstanding in this report?

The reported Class A percentage is based on 234,842,768 Butterfly Network Class A common shares outstanding as of April 20, 2026; this figure is used solely to calculate the 0.4% ownership percentage disclosed for Jonathan M. Rothberg.

How is Jonathan M. Rothberg’s Class B ownership in BFLY structured?

The 25,213,303 Class B shares are held through entities including 4C Holdings I–V, LLC and shares distributed from 4C Holdings I, LLC to entities owned by trusts created for the benefit of Dr. Rothberg’s children, representing 100% of the Class B class.

What role do 4C Holdings entities play in Butterfly Network (BFLY) ownership?

Entities 4C Holdings I–V, LLC each report Class B holdings, such as 4,716,596 shares (18.7%) for 4C Holdings I, LLC and 8,845,238 shares (35.1%) for 4C Holdings V, LLC, contributing to the overall 25,213,303 Class B shares beneficially owned.

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

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Accepted by SEC EDGAR 07/17/2026 - 04:20 PM EDT Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 10)

Butterfly Network, Inc.

(Name of Issuer)

Class A common stock, par value $0.0001 per share, Class B common stock, par value $0.0001 per share

(Title of Class of Securities)

124155102

(CUSIP Number)

Jonathan M. Rothberg, Ph.D.
c/o Butterfly Network, Inc., 1600 District Avenue
Burlington, MA, 01803
(781) 557-4800

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

07/15/2026

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

schemaVersion:

SCHEDULE 13D

CUSIP Number(s): 124155102

1

Name of reporting person

Rothberg Jonathan M.

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

PF

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 102,079.00
8	Shared Voting Power 726,696.00
9	Sole Dispositive Power 102,079.00
10	Shared Dispositive Power 726,696.00

11

Aggregate amount beneficially owned by each reporting person

828,775.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

0.4 %

14

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person:

This Reporting Person's table is for Class A common stock. Rows 7, 9 and 11 consists of (i) 80,434 shares of Class A common stock of Butterfly Network, Inc. (f/k/a Longview Acquisition Corp.) (the "Issuer") held by Jonathan M. Rothberg, Ph.D. and (ii) stock options to purchase 21,645 shares of Class A common stock of the Issuer which are exercisable within 60 days of July 17, 2026, held by Dr. Jonathan M. Rothberg. Rows 8, 10 and 11 consists of 726,696 shares of Class A common stock of the Issuer held by Dr. Rothberg's spouse. Row 13 is calculated based on 234,842,768 shares of Class A common stock of the Issuer outstanding as of April 20, 2026.

SCHEDULE 13D

CUSIP Number(s): 124155102

1

Name of reporting person

Rothberg Jonathan M.

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

PF

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 25,213,303.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 25,213,303.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

25,213,303.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

100 %

14

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person:

This Reporting Person's table is for Class B common stock. Rows 7, 9 and 11 consists of 25,213,303 shares of Class B common stock of the Issuer held by 4C Holdings I, LLC, 4C Holdings II, LLC, 4C Holdings III, LLC, 4C Holdings IV, LLC and 4C Holdings V, LLC and shares distributed from 4C Holdings I, LLC and held by entities owned by trusts created for the benefit of Dr. Jonathan Rothberg's children. Row 13 is calculated based on 25,213,303 shares of Class B common stock of the Issuer outstanding as of July 17, 2026.

SCHEDULE 13D

CUSIP Number(s): 124155102

1

Name of reporting person

4C Holdings I, LLC

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

PF

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 4,716,596.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 4,716,596.00

11

Aggregate amount beneficially owned by each reporting person

4,716,596.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

18.7 %

14

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person:

This Reporting Person's table is for Class B common stock. Row 13 is calculated based on 25,213,303 shares of Class B common stock of the Issuer outstanding as of July 17, 2026.

SCHEDULE 13D

CUSIP Number(s): 124155102

1

Name of reporting person

4C Holdings II, LLC

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

PF

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 2,621,701.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 2,621,701.00

11

Aggregate amount beneficially owned by each reporting person

2,621,701.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

10.4 %

14

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person:

This Reporting Person's table is for Class B common stock. Row 13 is calculated based on 25,213,303 shares of Class B common stock of the Issuer outstanding as of July 17, 2026.

SCHEDULE 13D

CUSIP Number(s): 124155102

1

Name of reporting person

4C Holdings III, LLC

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

PF

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 2,621,701.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 2,621,701.00

11

Aggregate amount beneficially owned by each reporting person

2,621,701.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

10.4 %

14

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person:

This Reporting Person's table is for Class B common stock. Row 13 is calculated based on 25,213,303 shares of Class B common stock of the Issuer outstanding as of July 17, 2026.

SCHEDULE 13D

CUSIP Number(s): 124155102

1

Name of reporting person

4C Holdings IV, LLC

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

PF

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 2,621,701.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 2,621,701.00

11

Aggregate amount beneficially owned by each reporting person

2,621,701.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

10.4 %

14

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person:

This Reporting Person's table is for Class B common stock. Row 13 is calculated based on 25,213,303 shares of Class B common stock of the Issuer outstanding as of July 17, 2026.

SCHEDULE 13D

CUSIP Number(s): 124155102

1

Name of reporting person

4C Holdings V, LLC

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

PF

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 8,845,238.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 8,845,238.00

11

Aggregate amount beneficially owned by each reporting person

8,845,238.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

35.1 %

14

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person:

This Reporting Person's table is for Class B common stock. Row 13 is calculated based on 25,213,303 shares of Class B common stock of the Issuer outstanding as of July 17, 2026.

SCHEDULE 13D

Item 1.	Security and Issuer
(a)	Title of Class of Securities: Class A common stock, par value $0.0001 per share, Class B common stock, par value $0.0001 per share
(b)	Name of Issuer: Butterfly Network, Inc.
(c)	Address of Issuer's Principal Executive Offices: 1600 District Avenue, Burlington, MASSACHUSETTS , 01803.
Item 1 Comment: Explanatory Note This Amendment No. 10 to Schedule 13D ("Amendment No. 10") amends and supplements the Schedule 13D filed on February 22, 2021, as amended by Amendment No. 1 filed on March 26, 2021, Amendment No. 2 filed on March 28, 2022, Amendment No. 3 filed on September 16, 2022, Amendment No. 4 filed on September 13, 2023, Amendment No. 5 filed on August 30, 2024, Amendment No. 6 filed on March 7, 2025, Amendment No. 7 filed on December 1, 2025, Amendment No. 8 filed on December 17, 2025 and Amendment No. 9 filed on March 17, 2026 (as amended, the "Schedule 13D") relating to the Class A common stock, par value $0.0001 per share, and Class B common stock, par value $0.0001 per share, of Butterfly Network, Inc. (f/k/a Longview Acquisition Corp.), a Delaware corporation (the "Issuer"). Information reported in the Schedule 13D remains in effect except to the extent that it is amended, restated or superseded by information contained in this Amendment No. 10. Capitalized terms used but not defined herein have the meanings ascribed to them in the Schedule 13D.
Item 4.	Purpose of Transaction
	Item 4 of the Schedule 13D is hereby amended and supplemented by adding the following:
Item 5.	Interest in Securities of the Issuer
(c)	Item 5 of the Schedule 13D is hereby amended and supplemented by adding the following: The following transactions were effected by the Reporting Persons since the most recent filing of the Reporting Persons on Schedule 13D. All transactions below were effected by the Reporting Persons in connection with estate planning and pursuant to a Rule 10b5-1 trading plan entered into on March 13, 2026. On July 14, 2026, 815,632 shares of Class A common stock were sold at a weighted average price per share of $7.7178. On July 15, 2026, 1,730,319 shares of Class A common stock were sold at a weighted average price per share of $7.3228. On July 16, 2026, 253,867 shares of Class A common stock were sold at a weighted average price per share of $7.0889. On July 16, 2026, 1,213,634 shares of Class B common stock were sold at a weighted average price per share of $7.0889. In accordance with its terms, the Class B common stock automatically converted into Class A common stock, on a one-to-one basis, upon sale.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Rothberg Jonathan M.

Signature:	/s/ Jonathan M. Rothberg
Name/Title:	Jonathan M. Rothberg, Ph.D.
Date:	07/17/2026

Rothberg Jonathan M.

Signature:	/s/ Jonathan M. Rothberg
Name/Title:	Jonathan M. Rothberg, Ph.D.
Date:	07/17/2026

4C Holdings I, LLC

Signature:	/s/ Jonathan M. Rothberg
Name/Title:	Jonathan M. Rothberg, Ph.D., Manager
Date:	07/17/2026

4C Holdings II, LLC

Signature:	/s/ Jonathan M. Rothberg
Name/Title:	Jonathan M. Rothberg, Ph.D., Manager
Date:	07/17/2026

4C Holdings III, LLC

Signature:	/s/ Jonathan M. Rothberg
Name/Title:	Jonathan M. Rothberg, Ph.D., Manager
Date:	07/17/2026

4C Holdings IV, LLC

Signature:	/s/ Jonathan M. Rothberg
Name/Title:	Jonathan M. Rothberg, Ph.D., Manager
Date:	07/17/2026

4C Holdings V, LLC

Signature:	/s/ Jonathan M. Rothberg
Name/Title:	Jonathan M. Rothberg, Ph.D., Manager
Date:	07/17/2026