Major Shareholder Third Rock Ventures Files Intent to Sell Additional Shares Amidst Ongoing Distribution
RAPP has more than doubled off its 52-week low of $7.73.
Summary
Third Rock Ventures, a 10% owner, filed a Form 144 to sell an additional $742,880 in shares, continuing a pattern of significant institutional selling that has exceeded $70 million in the last three months.
Key Events · Ownership and Investor Activity · RAPP
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Intent to Sell Additional Shares
Third Rock Ventures V, L.P., a 10% shareholder, filed a Form 144 indicating intent to sell 18,572 common shares, valued at approximately $742,880.
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Ongoing Institutional Distribution
This filing also reports that Third Rock Ventures has sold 836,136 shares for gross proceeds of over $70.5 million in the past three months, signaling a continued pattern of significant selling by a major institutional investor.
Analysis · RAPP · Life Sciences
This Form 144 filing indicates Third Rock Ventures V, L.P., a 10% shareholder, intends to sell an additional $742,880 worth of common stock. This follows significant sales by the same entity totaling over $70 million in the past three months, representing a continued pattern of distribution by a major institutional investor.
How filings like this one have moved
In the 30 days to Oct 5, 2026, 29.2% of the 1496 measured filings Wiseek scored 7 moved their stock by 5% or more by the next session's close. The median move was -0.63%. 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, RAPP was trading at $39.71 on NASDAQ in the Life Sciences sector, with a market capitalization of approximately $1.9B. The 52-week trading range was $7.73 to $42.27. This filing was assessed with negative market sentiment and an importance score of 7 out of 10.