Brian Birchler
CIK 1970151 · EVP, Corp and Development Ops · last filed 2026-04-17
"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
$3.66M
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 | $53.41 | $3.66M | -$4.04M | 20 | 2026-04-17 |
Recent Filings · Page 3 of 3
29 filingsInsider 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 |
|---|---|---|---|---|---|
| 2024-04-16 | IONS | Notice (144) | −905 | -$38.0K | EDGAR |
| 2024-03-04 | IONS | Other (J) | +604 | $20.8K | EDGAR |
| 2024-01-18 | IONS | Mixed | +7,583 | -$226.7K | EDGAR |
| 2024-01-17 | IONS | Notice (144) | −4,497 | -$227.3K | EDGAR |
| 2024-01-17 | IONS | Grant (A) | — | $0 | EDGAR |
| 2024-01-04 | IONS | Grant (A) | — | $0 | EDGAR |
| 2024-01-02 | IONS | Mixed | +471 | -$12.6K | EDGAR |
| 2023-04-19 | IONS | Mixed | +1,203 | -$24.5K | EDGAR |
| 2023-04-17 | IONS | Notice (144) | −713 | -$26.9K | EDGAR |
Showing 21–29 of 29
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Page 3 of 3
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.
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.