Matrix Capital Management Company, LP 4

What Happened
Matrix Capital Management Company, LP (reported as a 10% owner) sold 6,922,870 shares of Aura Biosciences, Inc. (AURA) on May 7, 2026 at $5.64 per share, for total proceeds of $39,044,987. The filing lists the transaction as an S (sale) via "open market or private sale." This is a disposition of shares (a sale), not a purchase.

Key Details

• Transaction date and price: 2026-05-07 — 6,922,870 shares at $5.64 each; proceeds $39,044,987.
• Transaction code: S = Sale (open market or private sale as reported).
• Shares owned after transaction: Not specified in the provided filing excerpt.
• Filing date: 2026-05-11 (filed four days after the trade); appears late relative to the typical two-business-day Form 4 deadline.
• Footnotes: Securities are held by Matrix Capital Management Master Fund, LP; Matrix Capital Management Company, LP is the investment manager and David E. Goel is the Managing General Partner. The reporting persons disclaim beneficial ownership except to the extent of pecuniary interest.

Context
This is institutional 10%‑owner activity (fund-level), not an executive/director purchase or sale — institutional sales can reflect portfolio management rather than a view on company fundamentals. The filing’s footnotes clarify the fund/manager relationship and include a disclaimer of beneficial ownership beyond pecuniary interest. The late filing may warrant monitoring for any amendment or additional disclosure.