Starboard Principal Co LP

Q: How is Starboard Principal Co LP's win rate calculated?

We take every open-market purchase (SEC code P) we can match to a stock price, then compare the split- and dividend-adjusted price on the purchase date to the most recent close. The win rate is the share of those buys currently trading above the purchase price. Sales and share grants are not scored.

10% Owner, Director · SEC CIK 1517139

Insider at ACTG ACACIA RESEARCH CORP GDOT GREEN DOT CORP CYXT Cyxtera Technologies, Inc. MLNX Mellanox Technologies, Ltd. QTM QUANTUM CORP /DE/ ISSI INTEGRATED SILICON SOLUTION INC MCRL MICREL INC DSPG DSP GROUP INC /DE/ WPP WAUSAU PAPER CORP. EXTR EXTREME NETWORKS INC ODP OFFICE DEPOT INC SRDX SURMODICS INC

Buy track record

How this insider's open-market purchases have performed

of buys now in profit

0 up · 36 down

Avg return since buy−71.0%

Median return−71.0%

Best trade−71.0%

Worst trade−71.0%

Buys scored36 (+24 n/a)

Average return by holding period — separates good entry timing from riding one long winner

After 1 month +0.0% 0% won · 36 trades

After 3 months +0.0% 0% won · 36 trades

After 6 months +0.0% 0% won · 36 trades

After 12 months +0.0% 0% won · 36 trades

Date	Company	Buy price	Value	ΔOwn	1M	3M	6M	12M	To date
May 6, 2013	WPP	$10	$496.1K	+33%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
May 3, 2013	WPP	$10	$618.9K	+71%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
May 2, 2013	WPP	$10	$607.8K	NEW	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
May 2, 2013	WPP	$10	$242.8K	+40%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Nov 9, 2012	WPP	$8	$129.6K	+0.3%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Nov 9, 2012	WPP	$8	$28.6K	+0.3%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Nov 9, 2012	WPP	$8	$45.9K	+0.4%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Nov 8, 2012	WPP	$8	$78K	+0.2%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Nov 8, 2012	WPP	$8	$17.2K	+0.2%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Nov 8, 2012	WPP	$8	$27.6K	+0.2%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Nov 7, 2012	WPP	$8	$183.8K	+0.5%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Nov 7, 2012	WPP	$8	$40.5K	+0.4%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Nov 7, 2012	WPP	$8	$65.1K	+0.6%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Nov 1, 2012	WPP	$8	$125.6K	+0.3%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Nov 1, 2012	WPP	$8	$27.7K	+0.3%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Nov 1, 2012	WPP	$8	$44.5K	+0.4%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Oct 31, 2012	WPP	$8	$31.4K	+0.1%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Oct 31, 2012	WPP	$8	$237.2K	+0.6%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Oct 31, 2012	WPP	$8	$7.1K	+0.1%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Oct 31, 2012	WPP	$8	$53.3K	+0.6%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Oct 31, 2012	WPP	$8	$11.2K	+0.1%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Oct 31, 2012	WPP	$8	$84.8K	+0.7%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Oct 26, 2012	WPP	$9	$108.9K	+0.3%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Oct 26, 2012	WPP	$9	$38.9K	+0.3%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Oct 25, 2012	WPP	$9	$96.8K	+0.2%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Oct 25, 2012	WPP	$9	$21.8K	+0.2%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Oct 25, 2012	WPP	$9	$34.6K	+0.3%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Oct 24, 2012	WPP	$9	$79.4K	+0.2%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Oct 24, 2012	WPP	$9	$17.8K	+0.2%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Oct 24, 2012	WPP	$9	$28.4K	+0.2%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Oct 12, 2012	WPP	$9	$19K	—	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Oct 12, 2012	WPP	$9	$6.8K	+0.1%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Oct 12, 2012	WPP	$9	$94.9K	+0.2%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Oct 12, 2012	WPP	$9	$33.9K	+0.3%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Oct 11, 2012	WPP	$9	$1.48M	+3.9%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%
Oct 11, 2012	WPP	$9	$528.6K	+4.6%	+0.0%	+0.0%	+0.0%	+0.0%	−71.0%

How this is calculated. We score only open-market purchases (SEC code P) — the buys that carry real signal. Each trade's return is measured from the adjusted closing price on the purchase date to the latest close, accounting for stock splits and dividends. The 1M/3M/6M/12M columns show the same trade's return after each fixed holding period; a dash means that horizon hasn't elapsed yet or isn't priceable. Sales are excluded because insiders sell for many routine reasons. With only 36 scored trades, treat this as a small sample, not a verdict.

Open-market buys

$47.26M

123 trades

Open-market sells

$110.67M

129 trades

Net flow

−$63.41M

Net selling

Total filings

280

transactions shown

Full transaction history

All Form 4 activity across every company, newest first

View on SEC EDGAR ↗

ACTG

ACACIA RESEARCH CORP

J Starboard Principal Co LP · 10% Owner · Other · filed May 16, 2025 ΔOwn +6.2%

+$1.08M

290,000 sh @ $4

ACTG

ACACIA RESEARCH CORP

J Starboard Principal Co LP · 10% Owner · Other · filed May 16, 2025 ΔOwn +66%

+$12.08M

3.26M sh @ $4

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −1.5%

Starboard Principal Co Lp sold $338.3K of GDOT, trimming their stake 1%.

−$338.3K

39,427 sh @ $9

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −1.5%

Starboard Principal Co Lp sold $62.5K of GDOT, trimming their stake 1%.

−$62.5K

7,281 sh @ $9

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −1.4%

Starboard Principal Co Lp sold $101.6K of GDOT, trimming their stake 1%.

−$101.6K

11,837 sh @ $9

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −1.5%

Starboard Principal Co Lp sold $36.6K of GDOT, trimming their stake 1%.

−$36.6K

4,266 sh @ $9

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −1.4%

Starboard Principal Co Lp sold $33K of GDOT, trimming their stake 1%.

−$33K

3,848 sh @ $9

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −1.9%

Starboard Principal Co Lp sold $77.8K of GDOT, trimming their stake 2%.

−$77.8K

9,070 sh @ $9

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −1.0%

Starboard Principal Co Lp sold $219.7K of GDOT, trimming their stake 1%.

−$219.7K

26,031 sh @ $8

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −0.9%

Starboard Principal Co Lp sold $40.6K of GDOT, trimming their stake 1%.

−$40.6K

4,808 sh @ $8

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −0.9%

Starboard Principal Co Lp sold $66K of GDOT, trimming their stake 1%.

−$66K

7,815 sh @ $8

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −1.0%

Starboard Principal Co Lp sold $23.8K of GDOT, trimming their stake 1%.

−$23.8K

2,817 sh @ $8

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −0.9%

Starboard Principal Co Lp sold $21.4K of GDOT, trimming their stake 1%.

−$21.4K

2,540 sh @ $8

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −1.2%

Starboard Principal Co Lp sold $50.5K of GDOT, trimming their stake 1%.

−$50.5K

5,989 sh @ $8

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −1.9%

Starboard Principal Co Lp sold $424.4K of GDOT, trimming their stake 2%.

−$424.4K

52,063 sh @ $8

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −0.9%

Starboard Principal Co Lp sold $213.9K of GDOT, trimming their stake 1%.

−$213.9K

26,031 sh @ $8

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −1.8%

Starboard Principal Co Lp sold $78.4K of GDOT, trimming their stake 2%.

−$78.4K

9,615 sh @ $8

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −0.9%

Starboard Principal Co Lp sold $39.5K of GDOT, trimming their stake 1%.

−$39.5K

4,808 sh @ $8

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −1.8%

Starboard Principal Co Lp sold $127.4K of GDOT, trimming their stake 2%.

−$127.4K

15,631 sh @ $8

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −0.9%

Starboard Principal Co Lp sold $64.2K of GDOT, trimming their stake 1%.

−$64.2K

7,815 sh @ $8

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −1.9%

Starboard Principal Co Lp sold $45.9K of GDOT, trimming their stake 2%.

−$45.9K

5,633 sh @ $8

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −0.9%

Starboard Principal Co Lp sold $23.2K of GDOT, trimming their stake 1%.

−$23.2K

2,817 sh @ $8

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −1.8%

Starboard Principal Co Lp sold $41.4K of GDOT, trimming their stake 2%.

−$41.4K

5,081 sh @ $8

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −0.9%

Starboard Principal Co Lp sold $20.9K of GDOT, trimming their stake 1%.

−$20.9K

2,541 sh @ $8

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −2.4%

Starboard Principal Co Lp sold $97.6K of GDOT, trimming their stake 2%.

−$97.6K

11,977 sh @ $8

GDOT

GREEN DOT CORP

Sell Starboard Principal Co LP · Insider · Open-market sale · filed Mar 8, 2024 ΔOwn −1.2%

Starboard Principal Co Lp sold $49.2K of GDOT, trimming their stake 1%.

−$49.2K

5,988 sh @ $8

ACTG

ACACIA RESEARCH CORP

Option exercise Starboard Principal Co LP · 10% Owner · Option exercise · filed Jul 17, 2023 ΔOwn +48%

+$18.98M

5.2M sh @ $4

ACTG

ACACIA RESEARCH CORP

Option exercise Starboard Principal Co LP · 10% Owner · Option exercise · filed Jul 17, 2023 ΔOwn +48%

+$3.51M

961,675 sh @ $4

ACTG

ACACIA RESEARCH CORP

Option exercise Starboard Principal Co LP · 10% Owner · Option exercise · filed Jul 17, 2023 ΔOwn +48%

+$5.97M

1.63M sh @ $4

ACTG

ACACIA RESEARCH CORP

Option exercise Starboard Principal Co LP · 10% Owner · Option exercise · filed Jul 17, 2023 ΔOwn +48%

+$2.04M

557,772 sh @ $4

Frequently asked questions

How is Starboard Principal Co LP's win rate calculated?

We take every open-market purchase (SEC code P) we can match to a stock price, then compare the split- and dividend-adjusted price on the purchase date to the most recent close. The win rate is the share of those buys currently trading above the purchase price. Sales and share grants are not scored.

Why are some buys not included in the score?

A purchase is excluded if we can't price it — for example if the ticker is missing from the filing, the company has been delisted, or the security isn't a common stock we can match to market data. Excluded counts are shown next to the scored total.

What do the 1M / 3M / 6M / 12M columns mean?

They show each purchase's return after a fixed holding period — one, three, six, and twelve months from the buy date — using split- and dividend-adjusted prices. This separates good entry timing from simply holding a long-running winner. A dash means that horizon hasn't elapsed yet for that trade, or the stock couldn't be priced at that date.

Does a high win rate mean I should copy this insider?

No. Past performance does not predict future results, sample sizes are often small, and an insider's edge in their own company doesn't transfer to yours. This is context, not a recommendation. InsiderSource is not investment advice.

Where does this data come from?

Trades come from Starboard Principal Co LP's SEC Form 4 filings on EDGAR. Prices come from public market data and are split/dividend-adjusted. Always verify against the original filings before acting.