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RAPP
NASDAQ Life Sciences

10% Shareholder Third Rock Ventures Files Intent to Sell Over $17M in Rapport Therapeutics Stock

Arie Shkolnikov · Analysis by Wiseek AI
More coverage: Biotech Stocks · Healthcare
Sentiment info
Negative
Importance info
7
Price
$39.71
Mkt Cap
$1.898B
52W Low
$7.73
52W High
$42.269
52W Position info
414% above low
Off High info
6.1% below high
Rel. Volume info
4.8× avg
Market data snapshot near publication time

RAPP has more than doubled off its 52-week low of $7.73 on elevated volume (4.8× avg).

Summary

A major 10% institutional shareholder, Third Rock Ventures, has filed a Form 144 to sell approximately $17.18 million worth of Rapport Therapeutics shares, indicating a potential significant reduction in their holdings.


Key Events · Ownership and Investor Activity · RAPP

  • Major Shareholder Intent to Sell

    Third Rock Ventures V, L.P., a 10% stockholder, filed a Form 144 to sell 426,005 shares of common stock.

  • Significant Value

    The proposed sale has an approximate market value of $17.18 million.

  • Potential Market Overhang

    This filing indicates a substantial block of shares may be sold, potentially adding selling pressure to the stock.


Analysis · RAPP · Life Sciences

Third Rock Ventures V, L.P., a 10% stockholder, has filed a Form 144 indicating its intent to sell 426,005 shares of Rapport Therapeutics common stock, valued at approximately $17.18 million. This proposed sale represents a significant disposition by a major institutional investor, potentially signaling a rebalancing of their portfolio or a strategic reduction in their stake. While not an immediate sale, the filing creates an overhang on the stock as it indicates a substantial block of shares may enter the market. This follows a pattern of insider distribution observed over the last 90 days.

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.

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RAPP - Latest Insights

RAPP
May 27, 2026, 9:16 AM EDT
Filing Type: 144
Importance Score:
7
Price at Filing: $39.71
Real-time Price: $42.13 info
Change: +$2.41 (+6%) info
Market Cap: $2.015B info
RAPP
May 07, 2026, 4:44 PM EDT
Filing Type: 144
Importance Score:
7
Price at Filing: $39.93
Real-time Price: $42.13 info
Change: +$2.20 (+5%) info
Market Cap: $2.015B info
RAPP
May 07, 2026, 7:30 AM EDT
Filing Type: 10-Q
Importance Score:
8
Price at Filing: $37.06
Real-time Price: $42.13 info
Change: +$5.06 (+14%) info
Market Cap: $2.015B info
RAPP
May 07, 2026, 7:15 AM EDT
Filing Type: 8-K
Importance Score:
9
Price at Filing: $37.06
Real-time Price: $42.13 info
Change: +$5.06 (+14%) info
Market Cap: $2.015B info
RAPP
Apr 21, 2026, 4:50 PM EDT
Filing Type: 8-K
Importance Score:
8
Price at Filing: $36.95
Real-time Price: $42.13 info
Change: +$5.17 (+14%) info
Market Cap: $2.015B info