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EdgarHawk

ROTHBERG JONATHAN M

Director

Director 10% Owner
6 filings analyzed · 2 companies · Latest 2026-01-08

Companies

Company Buys Sells Direction
Butterfly Network, Inc. BFLY 0 21 Net selling
Quantum-Si Inc QSI 0 8 Net selling

Activity

January 2026
high
Sell
1,140,180 shares
$4,695,583
Significance 7/10

Director Jonathan Rothberg sells entire 1,140,180-share stake (100% of holdings) at $4.12–$4.18 in 3 transactions, raising $4.7M

Director Jonathan M Rothberg executed 3 separate open-market sales totaling 1,140,180 shares for $4,695,583.28 at a blended average price of $4.12 over January 6–8, 2026, liquidating his entire position (100.0% net change). The complete exit follows 5 recent sales at BFLY within the prior two weeks (December 12–16, 2025), signaling sustained divestment pressure. Against a backdrop of significant unprofitability—net income of $-33,971,000.00 on quarterly revenue of $21,489,000.00—this total liquidation by a director warrants scrutiny of the company's financial trajectory and insider conviction, even as the stock has appreciated 33.9% over the prior 30 days and 82.0% over 90 days, narrowing the gap from the 52-week high of $4.82.

December 2025
high
Sell
886,294 shares
$2,796,489
Significance 7/10

Director Rothberg sold 886,294 shares (42.4% of holdings) at $3.16 blended average over 4 transactions on 2025-12-15/16

Jonathan M Rothberg, a Director at Butterfly Network, executed 4 separate sales totaling 886,294 shares for $2,796,488.86 at an average price of $3.16, reducing his holdings by 42.4% from 2,088,839 to 1,202,545 shares. The company is unprofitable with net income of $-33,971,000.00 on quarterly revenue of $21,489,000.00, though it shows annual revenue growth of +24.5%. The sales occurred over two consecutive trading days (2025-12-15 and 2025-12-16) at a price (-34.2% from 52-week high of $4.82) following a sharp 60.9% rally over the prior 30 days. Notably, Rothberg executed 5 prior sales at BFLY between 2025-12-09 and 2025-12-12, indicating a sustained reduction of his equity stake over a one-week window.

high
Sell
605,565 shares
$1,880,785
Significance 7/10

Director Jonathan M Rothberg sold entire 605.6K share position in BFLY for $1.9M across 4 sales (Dec 10-12), exiting 100% of holdings.

Jonathan M Rothberg, a director at Butterfly Network, executed 4 separate sales totaling 605,565 shares for $1,880,785.32 between December 10–12, 2025, at an average price of $3.11 per share, completely eliminating his position. This total liquidation is significant given his board status and the magnitude of the divestiture. The company remains unprofitable with a net income of $-34.0M in the latest quarter, though annual revenue growth of +24.5% shows top-line momentum. The stock's 90-day change of +91.7% and 30-day change of +33.2% preceded this exit, though the current price of $3.01 remains -37.6% from the 52-week high of $4.82, suggesting elevated recent volatility. Across his cross-ticker track record, Rothberg's 18 prior sells have demonstrated a 100.00% well-timed rate at the 90-day mark, but his 5 prior same-ticker sales at BFLY have not yet reached measurable outcomes, leaving this director's exit timing relative to company fundamentals unclear.

high
Sell
945,397 shares
$3,064,544
Significance 7/10

Director Rothberg sells 945,397 shares (89.5% of holdings) in 3 transactions for $3.1M at $3.24 blended average; stock now -36.7% from 52-week high.

Jonathan Rothberg, a Director at Butterfly Network, executed 3 separate sales totaling 945,397 shares for $3,064,544.25, reducing his holdings by 89.5% from 1,056,428 to 111,031 shares. The sales occurred on 2025-12-08 and 2025-12-09 at a blended average price of $3.24, while the stock now trades at $3.05 (down 36.7% from its 52-week high of $4.82). His cross-ticker track record shows a 90-day well-timed sell rate of 100% with an average 90-day return after sells of -26.2%, though his 5 prior same-ticker trades at BFLY have no yet-measurable outcomes. The company reported quarterly revenue of $21,489,000.00 and a net loss of $-33,971,000.00, with an annual revenue growth rate of 24.5% but unprofitable operations over the most recent full fiscal year. The substantial liquidation of a Director's position warrants attention to any divergence between recent insider confidence and underlying business performance.

November 2025
high
Sell
2,227,876 shares
$7,089,930
Significance 7/10

Director Jonathan M Rothberg sold 2,227,876 shares (73.6% of holdings) across 7 transactions for $7,089,929.58 at BFLY

Jonathan M Rothberg, a director of Butterfly Network, executed 7 separate sales totaling 2,227,876 shares for $7,089,929.58 between November 24–26, 2025, reducing his holdings from 3,025,846 shares to 797,970 shares. The scale of the divestiture (73.6% of pre-transaction holdings) is substantial and concentrated within a 3-day window. Notably, Rothberg's cross-ticker track record shows 8 prior open-market sells with a 90-day well-timed rate of 100.00%, meaning his past sales have consistently preceded stock declines. The underlying company fundamentals show ongoing unprofitability (net income of $-34.0M against $21.5M quarterly revenue) despite 24.5% annual revenue growth, and the current price of $3.08 is 36.1% below the 52-week high of $4.82, indicating significant valuation compression from recent peaks.

December 2024
2024-12-31 Quantum-Si Inc QSI
high
Sell
3,506,267 shares
$11,716,735
Significance 8/10

Director Jonathan M Rothberg sells 3,506,267 shares (73.7% of holdings) for $11.7M at blended avg $3.34

Jonathan M Rothberg executed 8 separate sales on 2024-12-27 totaling 3,506,267 shares for $11,716,734.62, reducing his holdings from 4,756,267 to 1,250,000 shares. The transaction occurred at a blended average price of $3.34, notably above the current price of $2.70 (19% higher) and near the company's 52-week high of $3.60. This is a substantial reduction in direct ownership stake by a director at a company that posted quarterly revenue of $787,000 and full-year net income of $-25,313,000, indicating the business is unprofitable and losing significant cash. The magnitude of the reduction (73.7% of pre-transaction holdings) combined with the company's deteriorating financial condition and the stock's recent decline to $2.70 suggests a material shift in the director's exposure to QSI at an inflection point in the company's market performance.

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