Ruddy Marcella K. 4

What Happened

• Marcella K. Ruddy, Chief Medical Officer of Tectonic Therapeutic, sold 10,000 shares on 2026-03-06 at $30.00 per share, for total proceeds of $300,000. The Form 4 reports the disposition as an open-market or private sale (code S).

Key Details

• Transaction date and price: 2026-03-06 — 10,000 shares at $30.00 each.
• Total value: $300,000.
• Shares owned after transaction: Not specified in the provided summary — check the full Form 4 on the SEC EDGAR site for current holdings.
• Footnote: Sale was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on April 8, 2025.
• Filing/timeliness: Form filed 2026-03-09 for a 2026-03-06 transaction; this filing appears timely (within standard Form 4 reporting window).

Context

• This was a sale under a pre-established 10b5-1 plan, which typically indicates the transaction was preplanned and may be routine rather than a reaction to company-specific news. Sales are common and less informative than purchases for gauging insider sentiment; retail investors should review the full Form 4 and the insider’s remaining holdings for fuller context.