Starboard Value & Opportunity C LP

CIK 1571704 · last filed 2023-07-17

Starboard Value & Opportunity C LP is a corporate insider who has filed 3 SEC Form 4 insider transactions across 3 companies since 2016. The most recent filing shows the insider exercised options covering $1.50B of ACTG on Jul 17, 2023. Across all open-market trades the lifetime net is −$32.0M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $21.2M 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.

Disclosed Exposure

$21.18M

Companies

3

Total Filings

3

Lifetime Open-Market Net

-$31.95M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.

Symbol	Role	Shares	Price	Disclosed Exposure	Lifetime OM Net	Filings	Latest Filed
ACTG	10%+ Owner	4,664,889	$4.54	$21.18M	$0	1	2023-07-17
Cyxtera Technologies, Inc. (CYXT) Delisted	Director	1,237,931	$0.07	$80.5K	$0	1	2022-01-19
QUANTUM CORP /DE/ (QTM) Delisted	10%+ Owner	269,309	—	—	-$31.95M	1	2016-01-26

Recent Filings

3 filings

Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.

Filed	Symbol	Action	Net Shares	Net $	Link
2023-07-17	ACTG	Exer (M)	+411,235,950	$1.50B	EDGAR
2022-01-19	Cyxtera Technologies, Inc. (CYXT) Delisted	Exer (M)	+4,421,304	$0	EDGAR
2016-01-26	QUANTUM CORP /DE/ (QTM) Delisted	Sell (S)	−45,000,000	-$31.95M	EDGAR

Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
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.