WILLIAM C MARTIN
CIK 1205885 · Chief Strategy Officer · last filed 2026-08-19
WILLIAM C MARTIN is a Chief Strategy Officer who has filed 110 SEC Form 4 insider transactions across 14 companies since 2007. The most recent filing shows the insider sold $1.4M of UEIC on Aug 19, 2026. Across all open-market trades the lifetime net is +$101.7M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $109.8M 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.
$109.85M
14
110
$101.67M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| UEIC | 10%+ Owner | 1,301,051 | $4.49 | $5.84M | -$1.37M | 1 | 2026-08-19 |
| IMMR | Chief Strategy Officer | 3,816,152 | $7.69 | $29.35M | -$8.41M | 44 | 2026-08-04 |
| BNED | Director | 181,738 | $12.51 | $2.27M | $7.85M | 6 | 2026-07-08 |
| 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 | $25.45 | $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 | $83.66 | $72.39M | -$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
110 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-08-19 | UEIC | Sell (S) | −267,584 | -$1.37M | EDGAR |
| 2026-08-04 | IMMR | Grant (A) | +5,640 | $0 | EDGAR |
| 2026-07-08 | BNED | Sell (S) | — | $0 | EDGAR |
| 2026-05-01 | IMMR | Grant (A) | +25,297 | $0 | EDGAR |
| 2026-03-13 | BNED | Grant (A) | +23,867 | $0 | EDGAR |
| 2026-02-02 | IMMR | Grant (A) | +6,588 | $0 | EDGAR |
| 2025-11-18 | IMMR | Grant (A) | +17,647 | $0 | EDGAR |
| 2025-11-04 | IMMR | Grant (A) | +7,952 | $0 | EDGAR |
| 2025-08-05 | IMMR | Grant (A) | +7,140 | $0 | EDGAR |
| 2025-07-03 | IMMR | Tax (F) | −68,400 | -$541.0K | 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.