William C Martin
CIK 1205885 · Chief Strategy Officer · last filed 2026-10-08
"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.
VTSS 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
TEN PRINCETON AVENUE, PO BOX 228
ROCKY HILL, NJ 08553
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| IMMR | Chief Strategy Officer | 3,833,369 | $7.09 | $27.18M | -$8.41M | 45 | 2026-10-08 |
| BNED | Director | 199,391 | $12.52 | $2.50M | $7.85M | 7 | 2026-09-29 |
| UEIC | 10%+ Owner | 1,301,051 | $4.98 | $6.48M | -$1.37M | 1 | 2026-08-19 |
| 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 | $22.01 | $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 | $79.80 | $69.05M | -$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 6 of 12
112 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 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 |
| 2016-12-19 | INTERMOLECULAR INC (IMI) Delisted | Buy (P) | +428,588 | $438.5K | EDGAR |
| 2016-11-22 | INTERMOLECULAR INC (IMI) Delisted | Buy (P) | +800 | $800 | EDGAR |
| 2016-11-17 | INTERMOLECULAR INC (IMI) Delisted | Buy (P) | +1,980,904 | $1.69M | EDGAR |
| 2016-11-07 | CAS | Sell (S) | −9,261,590 | -$926.2K | EDGAR |
| 2016-08-16 | INTERMOLECULAR INC (IMI) Delisted | Buy (P) | +21,888 | $27.4K | 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.