Starboard Value R LP
CIK 1575972 · last filed 2025-05-16
Starboard Value R LP is a corporate insider who has filed 2 SEC Form 4 insider transactions across 2 companies since 2015. The most recent filing, for ACTG, was dated May 16, 2025. Across all open-market trades the lifetime net is −$218.4M, making them a net seller over the disclosed history. The firm reports its address in New York, NY. 24 SEC filings were submitted jointly with STARBOARD VALUE & OPPORTUNITY MASTER FUND LTD.
"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.
MCRL 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
NEW YORK, NY 10017
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| ACTG | 10%+ Owner | 0 | $4.17 | $0 | $0 | 1 | 2025-05-16 |
| MICREL INC (MCRL) Delisted | 10%+ Owner | 2,991,477 | — | — | -$218.36M | 1 | 2015-06-08 |
Recent Filings
2 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2025-05-16 | ACTG | Other (J) | — | $0 | EDGAR |
| 2015-06-08 | MICREL INC (MCRL) Delisted | Sell (S) | −15,708,861 | -$218.36M | 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.