O'Sullivan Anthony

Chief Development Officer · SEC CIK 1874198
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Buy track record

How this insider's open-market purchases have performed
This insider has no open-market purchases in the records we parsed, so there's no buy track record to score. Their full filing history is below.
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Open-market buys
$0
0 trades
Open-market sells
$5.58M
21 trades
Net flow
−$5.58M
Net selling
Total filings
29
transactions shown

Full transaction history

All Form 4 activity across every company, newest first
View on SEC EDGAR ↗
TMC
Sell O'Sullivan Anthony · Chief Development Officer · Open-market sale · filed Dec 2, 2025 ΔOwn −2.4%

O'sullivan Anthony sold $338.5K of TMC, trimming their stake 2%.

−$338.5K
50,000 sh @ $7
TMC
Sell O'Sullivan Anthony · Chief Development Officer · Open-market sale · filed Dec 2, 2025 ΔOwn −2.4%

O'sullivan Anthony sold $325.5K of TMC, trimming their stake 2%.

−$325.5K
50,000 sh @ $7
TMC
Sell O'Sullivan Anthony · Chief Development Officer · Open-market sale · filed Aug 28, 2025 ΔOwn −18%

O'sullivan Anthony sold $1.31M of TMC, trimming their stake 18%.

−$1.31M
250,000 sh @ $5
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TMC
Sell O'Sullivan Anthony · Chief Development Officer · Open-market sale · filed Aug 28, 2025 ΔOwn −100%

O'sullivan Anthony sold $1.31M of TMC, trimming their stake 100%.

−$1.31M
185,110 sh @ $7
TMC
Sell O'Sullivan Anthony · Chief Development Officer · Open-market sale · filed Aug 28, 2025 ΔOwn −21%

O'sullivan Anthony sold $210K of TMC, trimming their stake 21%.

−$210K
50,000 sh @ $4
TMC
Sell O'Sullivan Anthony · Chief Development Officer · Open-market sale · filed Aug 28, 2025 ΔOwn −30%

O'sullivan Anthony sold $478K of TMC, trimming their stake 30%.

−$478K
100,000 sh @ $5
TMC
Sell O'Sullivan Anthony · Chief Development Officer · Open-market sale · filed May 21, 2025 ΔOwn −13%

O'sullivan Anthony sold $738.3K of TMC, trimming their stake 13%.

−$738.3K
164,317 sh @ $4
TMC
Sell O'Sullivan Anthony · Chief Development Officer · Open-market sale · filed May 31, 2024 ΔOwn −6.3%

O'sullivan Anthony sold $74.1K of TMC, trimming their stake 6%.

−$74.1K
50,000 sh @ $1
TMC
Sell O'Sullivan Anthony · Chief Development Officer · Open-market sale · filed May 31, 2024 ΔOwn −3.0%

O'sullivan Anthony sold $37.3K of TMC, trimming their stake 3%.

−$37.3K
25,000 sh @ $1
TMC
Sell O'Sullivan Anthony · Chief Development Officer · Open-market sale · filed May 31, 2024 ΔOwn −3.0%

O'sullivan Anthony sold $38.4K of TMC, trimming their stake 3%.

−$38.4K
25,000 sh @ $2
TMC
Sell O'Sullivan Anthony · Chief Development Officer · Open-market sale · filed May 23, 2024 ΔOwn −2.9%

O'sullivan Anthony sold $37K of TMC, trimming their stake 3%.

−$37K
25,000 sh @ $1
TMC
Sell O'Sullivan Anthony · Chief Development Officer · Open-market sale · filed May 23, 2024 ΔOwn −2.8%

O'sullivan Anthony sold $35.1K of TMC, trimming their stake 3%.

−$35.1K
25,000 sh @ $1
TMC
Sell O'Sullivan Anthony · Chief Development Officer · Open-market sale · filed May 23, 2024 ΔOwn −5.3%

O'sullivan Anthony sold $69.7K of TMC, trimming their stake 5%.

−$69.7K
50,000 sh @ $1
TMC
Sell O'Sullivan Anthony · Chief Development Officer · Open-market sale · filed Apr 1, 2024 ΔOwn −5.0%

O'sullivan Anthony sold $66.7K of TMC, trimming their stake 5%.

−$66.7K
50,000 sh @ $1
TMC
Sell O'Sullivan Anthony · Chief Development Officer · Open-market sale · filed Nov 29, 2023 ΔOwn −11%

O'sullivan Anthony sold $69K of TMC, trimming their stake 11%.

−$69K
50,000 sh @ $1
TMC
Sell O'Sullivan Anthony · Chief Development Officer · Open-market sale · filed Sep 28, 2023 ΔOwn −24%

O'sullivan Anthony sold $142.1K of TMC, trimming their stake 24%.

−$142.1K
140,000 sh @ $1
TMC
Sell O'Sullivan Anthony · Chief Development Officer · Open-market sale · filed Apr 5, 2023 ΔOwn −11%

O'sullivan Anthony sold $47.5K of TMC, trimming their stake 11%.

−$47.5K
60,660 sh @ $1
TMC
Sell O'Sullivan Anthony · Chief Development Officer · Open-market sale · filed Apr 5, 2023 ΔOwn −13%

O'sullivan Anthony sold $61.4K of TMC, trimming their stake 13%.

−$61.4K
85,170 sh @ $1
TMC
Sell O'Sullivan Anthony · Chief Development Officer · Open-market sale · filed Apr 5, 2023 ΔOwn −13%

O'sullivan Anthony sold $70K of TMC, trimming their stake 13%.

−$70K
97,393 sh @ $1
TMC
Sell O'Sullivan Anthony · Chief Development Officer · Open-market sale · filed Oct 3, 2022 ΔOwn −14%

O'sullivan Anthony sold $52.9K of TMC, trimming their stake 14%.

−$52.9K
50,686 sh @ $1
TMC
Sell O'Sullivan Anthony · Chief Development Officer · Open-market sale · filed Sep 21, 2022 ΔOwn −12%

O'sullivan Anthony sold $60.9K of TMC, trimming their stake 12%.

−$60.9K
50,686 sh @ $1

Frequently asked questions

How is O'Sullivan Anthony'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 O'Sullivan Anthony'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.