Birchler Brian 4

What Happened

• Brian Birchler, EVP of Corporate and Development Operations at Ionis Pharmaceuticals, had 1,875 restricted stock units vest on 2026-04-15 (converted to 1,875 shares at $0). He then sold 973 of those shares in an automatic sale on 2026-04-16 for a weighted average price of $75.04, generating approximately $73,016. The Form 4 also reports a derivative conversion/disposition entry for 1,875 shares on 2026-04-15 (reported at $0).

Key Details

• Transaction dates: RSU vest/conversion 2026-04-15; open-market sale (tax withholding) 2026-04-16. Filing date: 2026-04-17 (appears timely).
• Sale price: weighted average $75.04; reported range $75.01–$75.06 across multiple trades.
• Cash proceeds: ~ $73,016 from sale of 973 shares.
• Shares owned after transaction: not specified in the provided filing excerpt.
• Notable footnotes: (F1) shares acquired via RSU vesting; (F2) sale was automatic to cover required tax withholding under the 2011 Equity Incentive Plan; (F3) weighted-average pricing details and offer to provide per-trade prices on request; (F4/F5) each RSU equals one share and RSUs vest in four equal annual installments and may be paid in shares or cash.

Context

• These entries reflect RSU vesting and an automatic sell-to-cover for tax withholding—not an open-market purchase or directional trade by the insider. RSU vesting (derivative conversion) is a non-cash event; the subsequent sale is routine to satisfy tax obligations. If you want the exact per-trade prices within the reported range, the filer offers to provide that detail on request.