Thomas Michael Nevens
CIK 1251445 · last filed 2026-09-25
Thomas Michael Nevens is a corporate insider who has filed 82 SEC Form 4 insider transactions across 5 companies since 2007. The most recent filing, for CIEN, was dated Sep 25, 2026. Across all open-market trades the lifetime net is −$18.1M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $4.0M 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.
NTAP 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
20450 STEVENS CREEK BLVD, SUITE 800
CUPERTINO, CA 95014
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| CIEN | Director | 6,289 | $361.34 | $2.27M | -$1.34M | 1 | 2026-09-25 |
| NTAP | Director | 7,747 | $217.21 | $1.68M | -$10.54M | 30 | 2026-09-14 |
| CIEND | Director | 10,027 | — | — | -$4.42M | 26 | 2026-03-30 |
| ALTERA CORP (ALTR) Delisted | Director | 12,938 | $111.85 | $1.45M | -$1.75M | 14 | 2015-05-14 |
| BORLAND SOFTWARE CORP (BORL) Delisted | Director | — | — | — | $0 | 2 | 2007-07-27 |
Recent Filings
82 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-09-25 | CIEN | Mixed | −6,535 | -$1.34M | EDGAR |
| 2026-09-23 | CIEN | Notice (144) | −3,738 | -$1.34M | EDGAR |
| 2026-09-14 | NTAP | Sell (S) | −5,940 | -$1.16M | EDGAR |
| 2026-09-11 | NTAP | Notice (144) | −5,940 | -$1.11M | EDGAR |
| 2026-09-10 | NTAP | Mixed | +2,914 | $0 | EDGAR |
| 2026-03-30 | CIEND | Grant (A) | +605 | $0 | EDGAR |
| 2025-12-17 | CIEND | Sell (S) | −8,554 | -$1.92M | EDGAR |
| 2025-12-15 | CIEN | Notice (144) | −8,554 | -$1.92M | EDGAR |
| 2025-10-02 | CIEND | Gift (G) | −5,770 | $0 | EDGAR |
| 2025-09-11 | NTAP | Mixed | +3,026 | $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.