Richard Brudnick

Executive

Scholar Rock Holding Corp Prime Medicine, Inc.

Insider activity · 24 months1 buy1 saleCumulative net flow

Nov 24 · 0 buys · 0 salesDec 24 · 0 buys · 0 salesJan 25 · 0 buys · 0 salesFeb 25 · 0 buys · 0 salesMar 25 · 0 buys · 0 salesApr 25 · 0 buys · 0 salesMay 25 · 1 buy · 1 saleJun 25 · 0 buys · 0 salesJul 25 · 0 buys · 0 salesAug 25 · 0 buys · 0 salesSept 25 · 0 buys · 0 salesOct 25 · 0 buys · 0 salesNov 25 · 0 buys · 0 salesDec 25 · 0 buys · 0 salesJan 26 · 0 buys · 0 salesFeb 26 · 0 buys · 0 salesMar 26 · 0 buys · 0 salesApr 26 · 0 buys · 0 salesMay 26 · 0 buys · 0 salesJun 26 · 0 buys · 0 salesJul 26 · 0 buys · 0 salesAug 26 · 0 buys · 0 salesSept 26 · 0 buys · 0 salesOct 26 · 0 buys · 0 sales

Total declarations

Companies

▲ Purchases (1 ops.)

€21k

▼ Sales (1 ops.)

€122k

Latest filing published 08 Jun 2026 for Scholar Rock Holding Corp. Read the official filing

Filing timeline

BuySale

Richard Brudnick

Insider track record

Disclosed buys

Disclosed sells

Signal history

Closed purchases

Market purchases

Not enough history yet: 1 closed purchase, at least 2 are needed.

Purchases by company

Prime Medicine, Inc. 1 purchase · last 22 May 2025

Since each purchase

Prime Medicine, Inc.
Filed 22 May 2025 · 514 days ago · €21k
+130.2%
Entry US$1.29 · Close at T+365 US$2.97

Entry is the close on the day after publication, the first price a reader could act on. Prices in the listing currency. Past moves are not a forecast.

Richard Brudnick: trading record in brief

This profile gathers the share dealings of Richard Brudnick across 2 companies, led by Scholar Rock Holding Corp and Prime Medicine, Inc. Over a trading history stretching from 27 June 2024 to 4 June 2026, the count stands at 5 filings.

Market trades split into 1 purchase (€21k) and 1 sale (€122k). The net balance comes to €101k on the selling side. Buying on the open market means paying the going price with one's own funds, a different act from receiving shares as pay. Other entries cover 3 share grants.

The latest filing, published on 8 June 2026, reports a share grant in Scholar Rock Holding Corp. The latest purchase dates back some time: it was published 514 days ago, on 22 May 2025. Between a trade and the moment it shows up on SEC (Form 4), the median delay is 2 days. For comparison, the SEC allows two business days to file a Form 4. Source: insider filings from SEC (Form 4). Past trades are no guide to future returns.