ACET
Ra Capital Management, L.p., ACET's 10% owner, spent $535.5K of their own money on 74,268 shares at $7, growing their stake 7%. Their tracked buys have a 17% win rate.
+$535.5K
74,268 sh @ $7
RA CAPITAL MANAGEMENT, L.P.
10% Owner, Director · SEC CIK 1346824
Insider at
HOWL Werewolf Therapeutics, Inc.
ARTV Artiva Biotherapeutics, Inc.
PBLS Parabilis Medicines, Inc.
NKTX Nkarta, Inc.
BCAX Bicara Therapeutics Inc.
CLYM Climb Bio, Inc.
ABOS Acumen Pharmaceuticals, Inc.
TYRA Tyra Biosciences, Inc.
COAG Hemab Therapeutics Holdings, Inc.
ACRV Acrivon Therapeutics, Inc.
ACET Adicet Bio, Inc.
PRLD Prelude Therapeutics Inc
VOR Vor Biopharma Inc.
MLYS Mineralys Therapeutics, Inc.
WVE Wave Life Sciences Ltd.
EVMN Evommune, Inc.
SGP SpyGlass Pharma, Inc.
CDTX Cidara Therapeutics, Inc.
FULC Fulcrum Therapeutics, Inc.
SION Sionna Therapeutics, Inc.
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Buy track record
How this insider's open-market purchases have performed36%
of buys now in profit
12 up · 21 down
Avg return since buy+27.5%
Median return−0.1%
Best trade+401.7%
Worst trade−26.9%
Buys scored33
Average return by holding period — separates good entry timing from riding one long winner
After 1 month
+9.4%
75% won · 28 trades
After 3 months
+52.9%
67% won · 9 trades
After 6 months
+327.8%
100% won · 2 trades
After 12 months
—
not elapsed yet
| Date | Company | 90d trend | Buy price | Value | ΔOwn | 1M | 3M | 6M | 12M | To date |
|---|---|---|---|---|---|---|---|---|---|---|
| Jun 11, 2026 | ARTV | $8 | $4.34M | +3.5% | — | — | — | — | +6.7% | |
| Jun 10, 2026 | ARTV | $7 | $721 | — | — | — | — | — | +15.1% | |
| Jun 9, 2026 | ARTV | $7 | $3.31M | +3.2% | — | — | — | — | +17.5% | |
| May 20, 2026 | COAG | $25 | $24.8K | — | — | — | — | — | −5.6% | |
| May 19, 2026 | COAG | $25 | $94.9K | +0.1% | — | — | — | — | −1.8% | |
| May 12, 2026 | COAG | $25 | $159K | +0.1% | −3.6% | — | — | — | −3.6% | |
| May 11, 2026 | ARTV | $12 | $75M | +75% | −24.5% | — | — | — | −19.4% | |
| May 11, 2026 | COAG | $24 | $346.2K | +0.2% | +7.8% | — | — | — | −0.1% | |
| May 11, 2026 | COAG | $25 | $643K | +0.4% | +7.8% | — | — | — | −0.1% | |
| May 8, 2026 | COAG | $25 | $37K | — | +1.7% | — | — | — | −0.6% | |
| May 7, 2026 | COAG | $24 | $192.8K | +0.1% | −0.7% | — | — | — | −3.0% | |
| May 7, 2026 | COAG | $25 | $49.5K | — | −0.7% | — | — | — | −3.0% | |
| May 6, 2026 | COAG | $24 | $347.3K | +0.2% | +2.2% | — | — | — | −0.1% | |
| May 6, 2026 | COAG | $25 | $1.33M | +0.9% | +2.2% | — | — | — | −0.1% | |
| May 5, 2026 | COAG | $25 | $2.14M | +1.4% | +1.2% | — | — | — | −0.1% | |
| May 5, 2026 | COAG | $25 | $256.7K | +0.2% | +1.2% | — | — | — | −0.1% | |
| May 4, 2026 | COAG | $18 | $45.74M | +70% | +0.3% | — | — | — | −1.4% | |
| May 4, 2026 | COAG | $18 | $2.41M | +60% | +0.3% | — | — | — | −1.4% | |
| Mar 30, 2026 | MLYS | $24 | $1.41M | +1.0% | +13.4% | — | — | — | +2.2% | |
| Mar 30, 2026 | WVE | $7 | $6.31M | +3.7% | +6.6% | — | — | — | −10.7% | |
| Mar 27, 2026 | MLYS | $24 | $7.35M | +5.7% | +14.0% | — | — | — | +1.5% | |
| Mar 27, 2026 | WVE | $6 | $16.05M | +11% | +8.9% | — | — | — | −7.2% | |
| Mar 26, 2026 | WVE | $6 | $30.02M | +27% | +11.9% | — | — | — | −4.7% | |
| Mar 26, 2026 | WVE | $6 | $2.24M | +1.5% | +11.9% | — | — | — | −4.7% | |
| Feb 26, 2026 | BCAX | $16 | $4.8M | +7.0% | +12.6% | +30.8% | — | — | +29.1% | |
| Feb 20, 2026 | ACET | $7 | $543.4K | +6.7% | −3.1% | +8.7% | — | — | +16.0% | |
| Feb 19, 2026 | ACET | $7 | $535.5K | +7.2% | −5.0% | −2.6% | — | — | +11.3% | |
| Feb 18, 2026 | ACET | $7 | $525K | +7.8% | −1.8% | +6.2% | — | — | +17.3% | |
| Feb 9, 2026 | SGP | $16 | $55.07M | +136% | +3.6% | −9.2% | — | — | −26.9% | |
| Feb 9, 2026 | SGP | $16 | $3.97M | +14% | +3.6% | −9.2% | — | — | −26.9% | |
| Jan 5, 2026 | CLYM | $4 | $24.9K | +0.2% | +31.4% | +90.4% | — | — | +226.0% | |
| Dec 12, 2025 | CLYM | $3 | $290.2K | +3.1% | +56.7% | +142.0% | +281.3% | — | +284.7% | |
| Dec 11, 2025 | CLYM | $2 | $464.6K | +6.9% | +104.3% | +218.7% | +374.3% | — | +401.7% |
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 33 scored trades, treat this as a small sample, not a verdict.
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Open-market buys
$266.03M
33 trades
Open-market sells
$115.14M
66 trades
Net flow
+$150.89M
Net buying
Total filings
113
transactions shown
Full transaction history
All Form 4 activity across every company, newest firstMLYS
+$0
6,200 sh
ACET
Ra Capital Management, L.p., ACET's 10% owner, spent $525K of their own money on 74,577 shares at $7, growing their stake 8%. Their tracked buys have a 17% win rate.
+$525K
74,577 sh @ $7
EVMN
+$1,000K
35,868 sh @ $28
SGP
+$0
1.81M sh
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SGP
Ra Capital Management, L.p., SGP's 10% owner, spent $55.07M of their own money on 3.44M shares at $16, growing their stake 136%. Their tracked buys have a 17% win rate.
+$55.07M
3.44M sh @ $16
SGP
Ra Capital Management, L.p., SGP's 10% owner, spent $3.97M of their own money on 248,034 shares at $16, growing their stake 14%. Their tracked buys have a 17% win rate.
+$3.97M
248,034 sh @ $16
CDTX
+$129
1.29M sh @ $0
CDTX
−$1.03B
4.65M sh @ $222
CLYM
Ra Capital Management, L.p., CLYM's 10% owner, spent $24.9K of their own money on 7,111 shares at $4. Their tracked buys have a 17% win rate.
+$24.9K
7,111 sh @ $4
VOR
−$50M
4.63M sh @ $11
CLYM
Ra Capital Management, L.p., CLYM's 10% owner, spent $290.2K of their own money on 101,462 shares at $3, growing their stake 3%. Their tracked buys have a 17% win rate.
+$290.2K
101,462 sh @ $3
CLYM
−$0
20.44M sh
CLYM
Ra Capital Management, L.p., CLYM's 10% owner, spent $464.6K of their own money on 213,099 shares at $2, growing their stake 7%. Their tracked buys have a 17% win rate.
+$464.6K
213,099 sh @ $2
FULC
Ra Capital Management, L.p. sold $18.36M of FULC, trimming their stake 13%.
−$18.36M
1.38M sh @ $13
FULC
Ra Capital Management, L.p. sold $38.65M of FULC, trimming their stake 31%.
−$38.65M
2.71M sh @ $14
FULC
Ra Capital Management, L.p. sold $1.37M of FULC, trimming their stake 1%.
−$1.37M
91,722 sh @ $15
SION
−$47.8K
1,210 sh @ $40
SION
−$392K
9,924 sh @ $40
SION
−$254.4K
6,440 sh @ $40
SION
Ra Capital Management, L.p. sold $300.6K of SION, trimming their stake 5%.
−$300.6K
7,609 sh @ $40
SION
−$6K
150 sh @ $40
SION
−$49.3K
1,235 sh @ $40
SION
−$32K
801 sh @ $40
SION
−$37.8K
947 sh @ $40
SION
−$3.9K
96 sh @ $41
SION
−$31.9K
788 sh @ $41
SION
−$20.7K
512 sh @ $41
SION
−$24.5K
604 sh @ $41
SION
−$91.1K
2,276 sh @ $40
Frequently asked questions
How is RA CAPITAL MANAGEMENT, L.P.'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 RA CAPITAL MANAGEMENT, L.P.'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.