WILLIAM C MARTIN
CIK 1205885 · Chief Strategy Officer · last filed 2026-08-19
"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
$109.85M
Companies
14
Total Filings
110
Lifetime Open-Market Net
$101.67M
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 |
|---|---|---|---|---|---|---|---|
| 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 | $25.46 | $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 · Page 5 of 11
110 filingsInsider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2022-09-01 | IMMR | Buy (P) | +1,573 | $9.0K | EDGAR |
| 2022-08-29 | IMMR | Buy (P) | +45,141 | $256.6K | EDGAR |
| 2022-08-22 | IMMR | Buy (P) | +117,285 | $623.9K | EDGAR |
| 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 |
Form 4 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.
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.
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.