Ph.D. Jonathan M. Rothberg - 13 Mar 2026 SCHEDULE 13D/A Report for Butterfly Network, Inc. Class A common stock, par value $0.0001 per share, Class B common stock, par value $0.0001 per share (BFLY)

Filing Manager
Ph.D. Jonathan M. Rothberg
Reporting Manager
Rothberg Jonathan M.
Security
Butterfly Network, Inc. Class A common stock, par value $0.0001 per share, Class B common stock, par value $0.0001 per share
Symbol
BFLY
Shares outstanding
26,426,937 shares
Disclosed Ownership
26,426,937 shares
Ownership
100%
Form type
SCHEDULE 13D/A
Filing time
17 Mar 2026, 16:20:28 UTC
Date of event
13 Mar 2026
Previous filing
17 Dec 2025
SEC
View on sec.gov

Quoteable Key Fact

"Ph.D. Jonathan M. Rothberg disclosed 100% ownership in Butterfly Network, Inc. Class A common stock, par value $0.0001 per share, Class B common stock, par value $0.0001 per share (BFLY) on 13 Mar 2026."

Quick Takeaways

  • Ph.D. Jonathan M. Rothberg filed SCHEDULE 13D/A for Butterfly Network, Inc. Class A common stock, par value $0.0001 per share, Class B common stock, par value $0.0001 per share (BFLY).
  • Disclosed ownership: 100%.
  • Date of event: 13 Mar 2026.

What Changed

  • Previous schedule filing date: 17 Dec 2025.
  • Current filing was accepted on 17 Mar 2026, 16:20.

Why This Matters

  • This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
  • You can verify ownership claims directly against the original SEC filing.

Source Evidence

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

See Original Filing

Reporting Managers (7)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Rothberg Jonathan M. 1.6% 3,548,159 2,821,463 726,696 /s/ Jonathan M. Rothberg Jonathan M. Rothberg, Ph.D. 0001076352
Rothberg Jonathan M. 100% 26,426,937 26,426,937 0 /s/ Jonathan M. Rothberg Jonathan M. Rothberg, Ph.D.
4C Holdings I, LLC 18% 4,716,596 0 4,716,596 /s/ Jonathan M. Rothberg Jonathan M. Rothberg, Ph.D., Manager
4C Holdings II, LLC 9.9% 2,621,701 0 2,621,701 /s/ Jonathan M. Rothberg Jonathan M. Rothberg, Ph.D., Manager
4C Holdings III, LLC 9.9% 2,621,701 0 2,621,701 /s/ Jonathan M. Rothberg Jonathan M. Rothberg, Ph.D., Manager
4C Holdings IV, LLC 9.9% 2,621,701 0 2,621,701 /s/ Jonathan M. Rothberg Jonathan M. Rothberg, Ph.D., Manager
4C Holdings V, LLC 34% 8,845,238 0 8,845,238 /s/ Jonathan M. Rothberg Jonathan M. Rothberg, Ph.D., Manager
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