WILLIAM C MARTIN
CIK 1205885 · Chief Strategy Officer · last filed 2026-05-01
"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
$95.38M
Companies
13
Total Filings
107
Lifetime Open-Market Net
$103.04M
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 |
|---|---|---|---|---|---|---|---|
| IMMR | Chief Strategy Officer | 3,810,512 | $6.54 | $24.92M | -$8.41M | 43 | 2026-05-01 |
| BNED | Director | 181,738 | $11.12 | $2.02M | $7.85M | 5 | 2026-03-13 |
| GULFMARK OFFSHORE INC (GLF.WS) Delisted | Director | 54 | — | — | -$316.7K | 2 | 2017-12-26 |
| INTERMOLECULAR INC (IMI) Delisted | 10%+ Owner | 14,527,257 | — | — | $8.05M | 6 | 2016-12-19 |
| CAS | 10%+ Owner | 0 | $27.01 | $0 | $16.44M | 4 | 2016-11-07 |
| GULFMARK OFFSHORE INC (GLF) Delisted | Director | 3,550,306 | — | — | $387.1K | 1 | 2016-01-04 |
| MRV COMMUNICATIONS INC (MRVC) Delisted | 10%+ Owner | 2,136,864 | — | — | $25.59M | 3 | 2015-06-25 |
| SR | 10%+ Owner | 865,231 | $79.10 | $68.44M | -$1.91M | 4 | 2015-02-03 |
| VITESSE SEMICONDUCTOR CORP (VTSS) Delisted | Director | 14,321,127 | — | — | $47.30M | 5 | 2014-11-07 |
| COMVERGE, INC. (COMV) Delisted | 10%+ Owner | 1,274,867 | — | — | $2.98M | 1 | 2012-04-13 |
| DERMA SCIENCES, INC. (DSCI) Delisted | 10%+ Owner | 825,436 | — | — | $5.90M | 5 | 2012-03-29 |
| SALARY. COM, INC. (SLRY) Delisted | Director | 67,519 | — | — | $595.2K | 6 | 2010-05-05 |
| BANKRATE INC (RATE) Delisted | Director | 0 | $17.32 | $0 | -$1.43M | 8 | 2009-09-01 |
Recent Filings · Page 5 of 11
107 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2022-07-06 | IMMR | Tax (F) | −7,680 | -$41.2K | EDGAR |
| 2022-06-09 | IMMR | Grant (A) | +16,517 | $0 | EDGAR |
| 2022-06-01 | IMMR | Buy (P) | +60,000 | $342.0K | EDGAR |
| 2022-05-25 | IMMR | Grant (A) | +22,851 | $0 | EDGAR |
| 2022-04-05 | IMMR | Tax (F) | −8,201 | -$45.1K | EDGAR |
| 2022-01-28 | IMMR | Grant (A) | +326,151 | $0 | EDGAR |
| 2021-02-19 | IMMR | Sell (S) | −816,798 | -$10.53M | EDGAR |
| 2020-06-16 | IMMR | Grant (A) | +37,086 | $0 | EDGAR |
| 2017-12-26 | GULFMARK OFFSHORE INC (GLF.WS) Delisted | Sell (S) | −16,668 | -$316.7K | EDGAR |
| 2017-11-16 | GULFMARK OFFSHORE INC (GLF.WS) Delisted | Mixed | −5,850,506 | $58.36M | EDGAR |
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.