MATTHEW E MASSENGILL
CIK 1232826 · last filed 2026-03-19
MATTHEW E MASSENGILL is a corporate insider who has filed 112 SEC Form 4 insider transactions across 6 companies since 2007. The most recent filing, for WDC, was dated Mar 19, 2026. Across all open-market trades the lifetime net is −$45.8M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $22.5M 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.
$22.49M
6
112
-$45.77M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| WDC | Director | 35,013 | $562.92 | $19.71M | -$43.10M | 78 | 2026-03-19 |
| Sandisk Corp (SNDKV) Delisted | Director | 5,006 | — | — | $0 | 1 | 2025-03-04 |
| MICROSEMI CORP (MSCC) Delisted | Director | 0 | — | — | -$2.67M | 15 | 2018-05-30 |
| GT Advanced Technologies Inc. (GTAT) Delisted | Director | 84,964 | — | — | $0 | 4 | 2013-06-06 |
| SOLR | Director | 26,231 | $35.20 | $923.3K | $0 | 6 | 2010-09-13 |
| CNXT | Director | 34,000 | $54.48 | $1.85M | $0 | 6 | 2010-05-14 |
Recent Filings
112 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-03-19 | WDC | Grant (A) | — | $0 | EDGAR |
| 2026-02-06 | WDC | Sell (S) | −36,926 | -$9.62M | EDGAR |
| 2025-12-22 | WDC | Grant (A) | — | $0 | EDGAR |
| 2025-11-21 | WDC | Grant (A) | +1,585 | $0 | EDGAR |
| 2025-09-22 | WDC | Grant (A) | — | $0 | EDGAR |
| 2025-06-23 | WDC | Grant (A) | — | $0 | EDGAR |
| 2025-03-04 | Sandisk Corp (SNDKV) Delisted | Grant (A) | +4,840 | $0 | EDGAR |
| 2024-11-22 | WDC | Grant (A) | +4,542 | $0 | EDGAR |
| 2023-11-16 | WDC | Grant (A) | +6,300 | $0 | EDGAR |
| 2022-11-17 | WDC | Grant (A) | +7,962 | $0 | EDGAR |