Founder Rothberg unloads another $5.1M in Butterfly Network stock, pushing four-day disposals to $20.6M
BFLY has more than doubled off its 52-week low of $1.32.
Summary
Founder Jonathan Rothberg sold $5.1 million in Butterfly Network shares on July 21, capping a four-day, $20.6 million disposal spree that adds to a wave of insider selling.
Key Events · Ownership and Investor Activity · BFLY
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Founder Sells $5.1M on July 21
On July 21, 2026, Jonathan Rothberg sold 753,320 shares at a weighted average price of $6.7359, totaling approximately $5.1 million.
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Four-Day Selling Spree Totals $20.6M
Combined with sales on July 17 and July 20, Rothberg has sold 3,126,453 shares for $20.6 million over four days, all under a 10b5-1 plan adopted March 13, 2026.
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Insider Selling Wave Continues
This sale adds to a pattern of heavy insider selling: five insiders have sold $7.88 million in open-market transactions over the past 90 days, including $1.39 million by the CEO on July 20.
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10b5-1 Plan Execution
All sales were executed pursuant to a pre-arranged 10b5-1 trading plan, which provides an affirmative defense against insider trading allegations but does not negate the negative signal of large-scale founder disposals.
Analysis · BFLY · Industrial Applications And Services
Butterfly Network founder Jonathan Rothberg sold an additional 753,320 shares on July 21 at $6.74, bringing his four-day selling spree to 3.1 million shares worth $20.6 million. This extends a pattern of heavy insider selling that has seen over $7.8 million in open-market sales by five insiders in the past 90 days, including the CEO. The sales were executed under a 10b5-1 plan adopted in March 2026, but the sheer volume and concentration in a short window raise questions about founder conviction even as the company reported strong Q1 results.
How filings like this one have moved
In the 30 days to Sep 18, 2026, 35.4% of the 1144 measured filings Wiseek scored 8 moved their stock by 5% or more by the next session's close. The median move was -0.40%. These are measured outcomes after filings of this importance, not a forecast for this one.
Measured one observation per ticker per day, after exclusions. Current figures: Filing Impact Tracker · open dataset
At the time of this filing, BFLY was trading at $6.80 on NYSE in the Industrial Applications And Services sector, with a market capitalization of approximately $1.8B. The 52-week trading range was $1.32 to $9.69. This filing was assessed with negative market sentiment and an importance score of 8 out of 10.