Brian Birchler

CIK 1970151 · EVP, Corp and Development Ops · last filed 2026-04-17

Brian Birchler is an EVP, Corp and Development Ops who has filed 29 SEC Form 4 insider transactions across 1 company since 2023. The most recent filing, for IONS, was dated Apr 17, 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 $3.6M across reported positions.

"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.

Disclosed Exposure

$3.65M

Companies

1

Total Filings

29

Lifetime Open-Market Net

-$4.04M

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	68,473	$53.26	$3.65M	-$4.04M	20	2026-04-17

Recent Filings

29 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
2026-04-17	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
2025-10-16	IONS	Mixed	—	-$438.9K	EDGAR

Showing 1–10 of 29

Page 1 of 3 Next

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.