Ph.D. Jonathan M. Rothberg - 06 Jan 2026 Form 4 Insider Report for Butterfly Network, Inc. (BFLY)

Reporting relationship
Director, 10%+ Owner
Issuer ticker
BFLY
Reported as of
06 Jan 2026
Net transaction value
-$4,695,583
Source evidence Original filing metadata and source links for verification. 5 source fields
SEC form
4
Accepted by SEC
08 Jan 2026, 18:14:45 UTC
Prior SEC filing
29 Dec 2025
Next SEC filing
20 May 2026
Source filing
View source filing
Reporting owner 1 detail
Reporting owner signature
/s/ Jonathan M. Rothberg, Ph.D.

Key filing fact

Ph.D. Jonathan M. Rothberg filed Form 4 for Butterfly Network, Inc. (BFLY) on 08 Jan 2026.

Key facts

  • This page summarizes Ph.D. Jonathan M. Rothberg's Form 4 filing for Butterfly Network, Inc. (BFLY).
  • 3 reported transactions and 0 derivative rows are listed below.
  • Accepted by SEC: 08 Jan 2026, 18:14.

Change

  • Previous filing in this sequence was filed on 29 Dec 2025.
  • Current net transaction value: -$4,695,583.

Research use

  • This tells you what this filing adds before you inspect full transaction and derivative tables.
  • You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001076352 Primary reporting owner

ROTHBERG JONATHAN M

Relationship
Director, 10%+ Owner
Address
C/O BUTTERFLY NETWORK, INC., 1600 DISTRICT AVENUE, BURLINGTON
Signature
/s/ Jonathan M. Rothberg, Ph.D.
Signature date
08 Jan 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

BFLY transaction

Class A Common Stock

Sale

Transaction value
$1,416,806
Shares
-351,617
Change %
-31%
Price
$4.03
Shares after
788,563
Date
06 Jan 2026
Ownership
By JAR TR, LLC
Footnotes
F1, F2, F3
BFLY transaction

Class A Common Stock

Sale

Transaction value
$1,874,253
Shares
-452,729
Change %
-57%
Price
$4.14
Shares after
335,834
Date
07 Jan 2026
Ownership
By JAR TR, LLC
Footnotes
F1, F3, F4
BFLY transaction

Class A Common Stock

Sale

Transaction value
$1,404,525
Shares
-335,834
Change %
-100%
Price
$4.18
Shares after
0
Date
08 Jan 2026
Ownership
By JAR TR, LLC
Footnotes
F1, F3, F5
BFLY holding

Class A Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
2,880,252
Date
06 Jan 2026
Ownership
Direct
BFLY holding

Class A Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
726,696
Date
06 Jan 2026
Ownership
By Bonnie E Gould Rothberg MD
Footnotes
F3
BFLY holding

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
4,716,596
Date
06 Jan 2026
Ownership
By 4C Holdings I, LLC
Footnotes
F3
BFLY holding

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
2,621,701
Date
06 Jan 2026
Ownership
By 4C Holdings II, LLC
Footnotes
F3
BFLY holding

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
2,621,701
Date
06 Jan 2026
Ownership
By 4C Holdings III, LLC
Footnotes
F3
BFLY holding

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
2,621,701
Date
06 Jan 2026
Ownership
By 4C Holdings IV, LLC
Footnotes
F3
BFLY holding

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
8,845,238
Date
06 Jan 2026
Ownership
By 4C Holdings V, LLC
Footnotes
F3
BFLY holding

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
1,250,000
Date
06 Jan 2026
Ownership
By NVR TR, LLC
Footnotes
F3
BFLY holding

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
1,250,000
Date
06 Jan 2026
Ownership
By JNR TR, LLC
Footnotes
F3
BFLY holding

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
1,250,000
Date
06 Jan 2026
Ownership
By GBR TR, LLC
Footnotes
F3
BFLY holding

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
1,250,000
Date
06 Jan 2026
Ownership
By EJR TR, LLC
Footnotes
F3
* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 5 footnotes

Footnote F1

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.

Footnote F2

Represents the weighted average sales price per share. The shares sold at prices ranging from $4.00 to $4.0897 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.

Footnote F3

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.

Footnote F4

Represents the weighted average sales price per share. The shares sold at prices ranging from $4.00 to $4.2758 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.

Footnote F5

Represents the weighted average sales price per share. The shares sold at prices ranging from $4.04 to $4.2828 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.

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