Robert S Epstein
CIK 1252004 · Pres, United BioSource Corp. · last filed 2026-06-15
Robert S Epstein is a Pres, United BioSource Corp. who has filed 102 SEC Form 4 insider transactions across 5 companies since 2007. The most recent filing, for VCYT, was dated Jun 15, 2026. Across all open-market trades the lifetime net is −$26.8M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $6.1M across reported positions. 47 SEC filings were submitted jointly with ILLUMINA, 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.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
MHS 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
6000 SHORELINE COURT, SUITE 300
SOUTH SAN FRANCISCO, CA 94080
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| FATE | Director | 36,331 | $1.89 | $68.7K | $0 | 14 | 2026-06-15 |
| VCYT | Director | 57,718 | $23.88 | $1.38M | -$2.07M | 17 | 2026-06-15 |
| ILMN | Director | 22,139 | $212.08 | $4.70M | -$9.58M | 45 | 2025-05-23 |
| AVEO PHARMACEUTICALS, INC. (AVEO) Delisted | Director | — | $15.00 | — | $0 | 1 | 2012-12-20 |
| MEDCO HEALTH SOLUTIONS INC (MHS) Delisted | Pres, United BioSource Corp. | 0 | — | — | -$15.20M | 22 | 2012-04-03 |
Recent Filings
102 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-06-15 | VCYT | Grant (A) | +5,272 | $0 | EDGAR |
| 2026-06-15 | FATE | Grant (A) | — | $0 | EDGAR |
| 2026-05-22 | VCYT | Sell (S) | −10,000 | -$440.1K | EDGAR |
| 2026-05-20 | VCYT | Notice (144) | −10,000 | -$416.9K | EDGAR |
| 2026-05-06 | FATE | Exer (M) | +25,000 | $42.2K | EDGAR |
| 2025-10-03 | VCYT | Mixed | −11,473 | -$673.8K | EDGAR |
| 2025-10-01 | VCYT | Notice (144) | −21,473 | -$737.2K | EDGAR |
| 2025-06-23 | VCYT | Grant (A) | +9,321 | $0 | EDGAR |
| 2025-05-30 | FATE | Grant (A) | — | $0 | EDGAR |
| 2025-05-23 | ILMN | Grant (A) | +3,780 | $0 | 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.