David Sidransky
CIK 1277161 · Chairman of the Board · last filed 2025-11-07
David Sidransky is a Chairman of the Board who has filed 67 SEC Form 4 insider transactions across 10 companies since 2007. The most recent filing, for CSBR, was dated Nov 7, 2025. Across all open-market trades the lifetime net is −$311.6K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $3.7M 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.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
ADXS.W 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
720 RUTLAND AVENUE
BALTIMORE, MD 21205
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| CSBR | Director | 770,605 | $4.86 | $3.75M | $0 | 13 | 2025-11-07 |
| Orgenesis Inc. (ORGS) Delisted | Director | 18 | $0.49 | $9 | $1.1K | 9 | 2023-12-21 |
| Old Ayala, Inc (AYLA) Delisted | Director | 230 | $0.50 | $116 | $3.7K | 3 | 2022-06-15 |
| Ayala Pharmaceuticals, Inc. (ADXS) Delisted | Director | — | $0.60 | — | $0 | 3 | 2020-05-05 |
| Ayala Pharmaceuticals, Inc. (ADXSW) Delisted | Director | 110,355 | — | — | $0 | 5 | 2018-06-27 |
| Ayala Pharmaceuticals, Inc. (ADXS.W) Delisted | Director | 80,355 | — | — | -$342.3K | 6 | 2016-08-10 |
| IMMUNE PHARMACEUTICALS INC (IMNP) Delisted | Director | 1,085 | — | — | $26.0K | 2 | 2015-01-12 |
| K-V Pharmaceutical Co (KV.B) Delisted | Director | 1,000 | — | — | $0 | 5 | 2012-05-16 |
| ACEL | Director | — | $11.28 | — | $0 | 4 | 2009-01-05 |
| ZILA INC (ZILA) Delisted | Director | — | — | — | $0 | 1 | 2007-01-10 |
Recent Filings
67 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2025-11-07 | CSBR | Grant (A) | — | $0 | EDGAR |
| 2024-11-18 | CSBR | Grant (A) | — | $0 | EDGAR |
| 2023-12-21 | Orgenesis Inc. (ORGS) Delisted | Grant (A) | — | $0 | EDGAR |
| 2023-11-07 | CSBR | Grant (A) | — | $0 | EDGAR |
| 2023-08-17 | CSBR | Grant (A) | — | $0 | EDGAR |
| 2023-01-23 | — | Grant (A) | +46 | $0 | |
| 2023-01-23 | — | Disp (D) | −250 | $0 | |
| 2022-12-29 | Orgenesis Inc. (ORGS) Delisted | Grant (A) | — | $0 | EDGAR |
| 2022-10-14 | CSBR | Mixed | +4,771 | -$2 | EDGAR |
| 2022-06-15 | Old Ayala, Inc (AYLA) Delisted | Grant (A) | — | $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.