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 $118.4M across reported positions. The firm reports its address in New York, NY. 47 SEC filings were submitted jointly with ORBIMED ADVISORS LLC.
"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.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
IRON price and trades
Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.
Shares held
Shares owned after each reported transaction on this company (direct holdings as reported).
Open-market buying and selling
by monthDollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.
Exposure by company
latestMost recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.
Filer Profile
54TH FLOOR
NEW YORK, NY 10022-4629
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| SION | Director | 2,671,721 | $3.69 | $9.86M | -$12.56M | 4 | 2026-05-29 |
| TRAW | 10%+ Owner | 1,203,250 | $0.34 | $410.4K | $2.00M | 2 | 2026-04-28 |
| IRON | Director | 899,349 | $77.66 | $69.84M | -$32.02M | 2 | 2023-12-20 |
| JANX | Director | 2,295,266 | $16.69 | $38.31M | -$6.81M | 1 | 2021-12-23 |
Recent Filings
9 filings| 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 |
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.