Starboard Principal Co LP
CIK 1517139 · last filed 2025-05-16
Starboard Principal Co LP is a corporate insider who has filed 9 SEC Form 4 insider transactions across 7 companies since 2012. The most recent filing, for ACTG, was dated May 16, 2025. Across all open-market trades the lifetime net is +$43.4M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $32.9M 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.
$32.92M
7
9
$43.40M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| ACTG | 10%+ Owner | 0 | $4.68 | $0 | $0 | 2 | 2025-05-16 |
| GDOT | 853,129 | $13.09 | $11.17M | -$6.89M | 1 | 2024-03-08 | |
| Mellanox Technologies, Ltd. (MLNX) Delisted | 10%+ Owner | 3,758,713 | — | — | $0 | 1 | 2018-03-02 |
| QUANTUM CORP /DE/ (QTM) Delisted | 10%+ Owner | 4,277,294 | — | — | -$61.30M | 2 | 2016-12-07 |
| WPP | 10%+ Owner | 1,140,650 | $19.07 | $21.75M | $5.61M | 1 | 2012-11-02 |
| ODP Corp (ODP) Delisted | 10%+ Owner | 12,117,929 | $28.00 | $339.30M | $142.53M | 1 | 2012-09-17 |
| SURMODICS INC (SRDX) Delisted | 10%+ Owner | 1,406,667 | $42.98 | $60.46M | -$36.55M | 1 | 2012-08-10 |
Recent Filings
9 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2025-05-16 | ACTG | Other (J) | — | $0 | EDGAR |
| 2024-03-08 | GDOT | Sell (S) | −827,187 | -$6.89M | EDGAR |
| 2023-07-17 | ACTG | Exer (M) | +164,494,380 | $600.40M | EDGAR |
| 2018-03-02 | Mellanox Technologies, Ltd. (MLNX) Delisted | Exer (X) | +4,600,000 | $115.00M | EDGAR |
| 2016-12-07 | QUANTUM CORP /DE/ (QTM) Delisted | Sell (S) | −70,650,000 | -$64.38M | EDGAR |
| 2013-04-08 | QUANTUM CORP /DE/ (QTM) Delisted | Buy (P) | +2,500,000 | $3.08M | EDGAR |
| 2012-11-02 | WPP | Buy (P) | +675,000 | $5.61M | EDGAR |
| 2012-09-17 | ODP Corp (ODP) Delisted | Buy (P) | +62,252,829 | $142.53M | EDGAR |
| 2012-08-10 | SURMODICS INC (SRDX) Delisted | Sell (S) | −2,060,480 | -$36.55M | EDGAR |