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Insider · CIK 0001692359

Richard Brudnick

officerdirector

Files at SRRK (Scholar Rock Holding Corp), PRME (Prime Medicine, Inc.). First filing May 22, 2025, latest May 30, 2025.

Track record
Not enough history
Fewer than three past buys with six months of prices.
Median 6-month excess
-
after past buys, n = 0
Hit rate
-
past buys that beat the index over 6 months
Open-market trades
1 / 1
$24k bought, $181k sold

Where the trades landed

Last year at the company this insider has traded most, with each buy and sell on the bar it happened.

SRRK: Scholar Rock Holding Corp

SRRKOct 9, 2026 · close 42.19

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™

Signals

This insider’s open-market buys and sells, scored.

ScoreCompanyValueHoldingsPrice contextFiled
32Weak
SRRKsell 610b5-1
Scholar Rock Holding Corp
$181k
6,075 shares
-29%+322% from low-36% from high
38Weak
PRMEbuy 3
Prime Medicine, Inc.
$24k
20,000 shares
--

Transactions

Every row this insider has filed, newest first.

DateCompanyTransactionSharesPriceValueHoldings afterFiled
May 29, 2025SRRK
Scholar Rock Holding Corp
SOpen-market sale
Common Stock10b5-1
-4,675$29.63$139k16,457May 30, 2025
May 29, 2025SRRK
Scholar Rock Holding Corp
SOpen-market sale
Common Stock10b5-1
-1,400$30.00$42k15,057May 30, 2025
May 22, 2025SRRK
Scholar Rock Holding Corp
AGrant or award
Common Stock
+7,632$0.00$021,132May 23, 2025
May 22, 2025SRRK
Scholar Rock Holding Corp
AGrant or award
Stock Option (Right to Buy)derivative
+9,206$0.00$09,206May 23, 2025
May 20, 2025PRME
Prime Medicine, Inc.
POpen-market purchase
Common Stock
+20,000$1.19$24k20,000May 22, 2025
Feb 27, 2025PRME
Prime Medicine, Inc.
AGrant or award
Stock Option (right to buy)derivative
+225,000$0.00$0225,000Mar 3, 2025
Dec 5, 2024PRME
Prime Medicine, Inc.
AGrant or award
Stock Option (right to buy)derivative
+19,300$0.00$057,900Dec 9, 2024

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

Richard Brudnick: insider trades and track record | InsiderTell