SION
−$4.21M
94,583 sh @ $45
Thompson Peter A.
Director, 10% Owner · SEC CIK 1357522Advertisement
Buy track record
How this insider's open-market purchases have performed100%
of buys now in profit
7 up · 0 down
Avg return since buy+168.7%
Median return+156.5%
Best trade+379.8%
Worst trade+37.7%
Buys scored7
Average return by holding period — separates good entry timing from riding one long winner
After 1 month
−2.7%
71% won · 7 trades
After 3 months
−7.2%
29% won · 7 trades
After 6 months
+13.7%
71% won · 7 trades
After 12 months
+72.4%
86% won · 7 trades
| Date | Company | 90d trend | Buy price | Value | ΔOwn | 1M | 3M | 6M | 12M | To date |
|---|---|---|---|---|---|---|---|---|---|---|
| Apr 3, 2025 | EWTX | $20 | $7.5M | +2.6% | +21.8% | −4.1% | +15.2% | +141.8% | +156.5% | |
| Apr 3, 2025 | EWTX | $20 | $2.5M | +39% | +21.8% | −4.1% | +15.2% | +141.8% | +156.5% | |
| Feb 10, 2025 | SION | $18 | $9.9M | +17% | −33.0% | −42.0% | −9.9% | +70.9% | +61.5% | |
| Jan 23, 2024 | EWTX | $11 | $5M | +3.3% | +11.8% | +1.2% | +40.9% | +74.6% | +125.3% | |
| Aug 29, 2023 | SPRY | $6 | $3.1M | +6.6% | −46.7% | −32.3% | +18.1% | +83.1% | +37.7% | |
| Sep 16, 2022 | EWTX | $10 | $5M | +3.6% | +3.2% | −17.1% | −21.4% | −33.9% | +263.6% | |
| May 18, 2022 | EWTX | $7 | $995K | +1.0% | +1.9% | +48.1% | +37.7% | +28.2% | +379.8% |
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 7 scored trades, treat this as a small sample, not a verdict.
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Open-market buys
$33.99M
7 trades
Open-market sells
$92.7M
30 trades
Net flow
−$58.7M
Net selling
Total filings
53
transactions shown
Full transaction history
All Form 4 activity across every company, newest firstCRVS
−$4.89M
1.18M sh @ $4
EWTX
Thompson Peter A., EWTX's 10% owner, spent $7.5M of their own money on 372,578 shares at $20, growing their stake 3%.
+$7.5M
372,578 sh @ $20
EWTX
Thompson Peter A., EWTX's 10% owner, spent $2.5M of their own money on 124,193 shares at $20, growing their stake 39%.
+$2.5M
124,193 sh @ $20
SION
+$0
3.15M sh
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SION
Thompson Peter A., SION's Director, spent $9.9M of their own money on 550,000 shares at $18, growing their stake 17%.
+$9.9M
550,000 sh @ $18
SPRY
−$1.09M
83,695 sh @ $13
SPRY
−$905.6K
69,500 sh @ $13
SPRY
−$5.07M
391,482 sh @ $13
SPRY
−$5.33M
394,400 sh @ $14
SPRY
−$194.3K
13,300 sh @ $15
ALPN
−$0
264,315 sh
EWTX
Thompson Peter A., EWTX's 10% owner, spent $5M of their own money on 454,545 shares at $11, growing their stake 3%.
+$5M
454,545 sh @ $11
ALPN
+$1.85M
145,251 sh @ $13
ALPN
−$532.6K
26,872 sh @ $20
ALPN
−$62K
3,128 sh @ $20
ALPN
−$21.9M
1.2M sh @ $18
ALPN
−$2.55M
139,166 sh @ $18
ALPN
−$3.25M
162,576 sh @ $20
ALPN
−$377.7K
18,922 sh @ $20
SPRY
Thompson Peter A., SPRY's Director, spent $3.1M of their own money on 500,000 shares at $6, growing their stake 7%.
+$3.1M
500,000 sh @ $6
EWTX
Thompson Peter A., EWTX's 10% owner, spent $5M of their own money on 484,496 shares at $10, growing their stake 4%.
+$5M
484,496 sh @ $10
EWTX
Thompson Peter A., EWTX's 10% owner, spent $995K of their own money on 138,000 shares at $7, growing their stake 1%.
+$995K
138,000 sh @ $7
Frequently asked questions
How is Thompson Peter A.'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 Thompson Peter A.'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.