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Brian Birchler

CIK 1970151 · EVP, Corp and Development Ops · last filed 2026-09-02

Brian Birchler is an EVP, Corp and Development Ops who has filed 30 SEC Form 4 insider transactions across 1 company since 2023. The most recent filing, for IONS, was dated Sep 2, 2026. Across all open-market trades the lifetime net is −$4.0M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $4.9M across reported positions. 31 SEC filings were submitted jointly with IONIS PHARMACEUTICALS INC.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$4.86M

Companies

1

Total Filings

30

Lifetime Open-Market Net

-$4.04M

Filer Profile

Reported Address
C/O IONIS PHARMACEUTICALS, INC.
2855 GAZELLE COURT
CARLSBAD, CA 92010
Related Filers
IONIS PHARMACEUTICALS INC — 31 joint filings, latest 2026-09-02
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
IONS EVP, Corp and Development Ops 102,883 $47.25 $4.86M -$4.04M 21 2026-09-02

Recent Filings

30 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-09-02 IONS Other (J) +58 $3.0K EDGAR
2026-04-17 IONS Mixed +902 -$73.0K EDGAR
2026-04-16 IONS Notice (144) −973 -$73.4K EDGAR
2026-03-03 IONS Other (J) +351 $17.2K EDGAR
2026-02-02 IONS Mixed +5,812 -$513.0K EDGAR
2026-01-30 IONS Notice (144) −6,179 -$512.3K EDGAR
2026-01-20 IONS Mixed +11,609 -$636.9K EDGAR
2026-01-16 IONS Notice (144) −8,480 -$646.4K EDGAR
2026-01-06 IONS Grant (A) — $0 EDGAR
2025-11-07 IONS Sell (S) −8,000 -$609.4K EDGAR
Showing 1–10 of 30
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Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.