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OrbiMed Capital GP VIII LLC

CIK 1845804 · last filed 2026-05-29

OrbiMed Capital GP VIII LLC is a corporate insider who has filed 9 SEC Form 4 insider transactions across 4 companies since 2021. The most recent filing shows the insider sold $9.0K of SION on May 29, 2026. Across all open-market trades the lifetime net is −$49.4M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $226.6M 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.

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Disclosed Exposure

$226.55M

Companies

4

Total Filings

9

Lifetime Open-Market Net

-$49.39M

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
SION Director 2,671,721 $46.55 $124.37M -$12.56M 4 2026-05-29
TRAW 10%+ Owner 1,203,250 $0.51 $617.3K $2.00M 2 2026-04-28
IRON Director 899,349 $74.65 $67.14M -$32.02M 2 2023-12-20
JANX Director 2,295,266 $15.00 $34.43M -$6.81M 1 2021-12-23

Recent Filings

9 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
2026-05-29 SION Sell (S) −202 -$9.0K EDGAR
2026-04-28 TRAW Buy (P) +1,195,458 $2.00M EDGAR
2026-02-04 SION Sell (S) −61,906 -$2.76M EDGAR
2025-12-19 SION Sell (S) −3,750 -$166.9K EDGAR
2025-11-26 SION Sell (S) −216,146 -$9.63M EDGAR
2025-01-27 TRAW Buy (P) — $0 EDGAR
2023-12-20 IRON Mixed — -$146.5K EDGAR
2023-12-14 IRON Sell (S) −536,800 -$31.61M EDGAR
2021-12-23 JANX Sell (S) −358,200 -$6.81M EDGAR
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.