MarketPeel
Insider Trading Intelligence
SL

Samsara Biocapital, L.p.

MLYS
10% OWNER · MINERALYS THERAPEUTICS, INC. · CIK 0001699737
FILING MIX · LIFETIME81%/19%
BUYS
17
SELLS
4
TOTAL VALUE
$53.04M
COMPANIES
5
ACTIVE SINCE
Feb 2023
HOLDINGS NOW
14,402,373
AVG SELL PX
TRADE KIND
SHOWING 21 / 21
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
8 backtested trades · 8 horizons · 6 pending
Forward-return performance of every backtestable P/S trade by Samsara Biocapital, L.p., measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d8+25.00%-10.02%-0.43%-9.59%-13.76%
14d8+25.00%-2.28%-0.68%-1.60%-12.15%
30d8+12.50%-4.13%+0.77%-4.90%-10.76%
60d8+12.50%-13.13%+2.23%-15.36%-36.28%
90d8+12.50%-13.15%+1.42%-14.57%-31.75%
180d8+12.50%-23.89%+4.27%-28.16%-32.72%
1y8(1 pending)+14.29%+14.91%+19.33%-4.42%-35.76%
2y8(5 pending)+66.67%+117.07%+49.28%+67.78%+62.00%
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
MLYS · 5,674,916 shares · as of Mar 13, 2025
01,418,7292,837,4584,256,1875,674,91620242025SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 17 buys / 4 sellsCOVERAGE · 14 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
KLRS
KALARIS THERAPEUTICS, INC.
PURCHASE
14,93714,937May 20, 2026May 22, 2026View →
KLRS
KALARIS THERAPEUTICS, INC.
PURCHASE
4,47119,408May 20, 2026May 22, 2026View →
KLRS
KALARIS THERAPEUTICS, INC.
PURCHASE
244,300$4.83$1.18M2,224,147May 20, 2026May 22, 2026View →
KLRS
KALARIS THERAPEUTICS, INC.
SALE
66,90610,657,028May 20, 2026May 22, 2026View →
KLRS
KALARIS THERAPEUTICS, INC.
PURCHASE
479,847$10.42$5.00M1,979,847Dec 18, 2025Feb 17, 2026View →
MLYS
MINERALYS THERAPEUTICS, INC.
PURCHASE
600,000$13.50$8.10M5,674,916Mar 13, 2025Mar 17, 2025View →
MLYS
MINERALYS THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
32,90032,900Feb 13, 2025Feb 24, 2025View →
NGNE
NEUROGENE INC.
PURCHASE
20,748$24.91$516.8K1,689,105Nov 26, 2024Nov 27, 2024View →
NGNE
NEUROGENE INC.
PURCHASE
15,219$26.73$406.8K1,715,127Nov 26, 2024Nov 27, 2024View →
NGNE
NEUROGENE INC.
PURCHASE
10,803$26.01$281.0K1,699,908Nov 26, 2024Nov 27, 2024View →
NGNE
NEUROGENE INC.
PURCHASE
2,000$27.50$55.0K1,717,127Nov 26, 2024Nov 27, 2024View →
MLYS
MINERALYS THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
22,00022,000May 22, 2024May 23, 2024View →
VTVT
VTV THERAPEUTICS INC.
PURCHASEGRANT
Stock grant
58,885892,578Mar 5, 2024Dec 6, 2024View →
VTVT
VTV THERAPEUTICS INC.
SALE
58,836206,784Mar 5, 2024Dec 6, 2024View →
MLYS
MINERALYS THERAPEUTICS, INC.
PURCHASE
555,555$13.50$7.50M5,074,916Feb 12, 2024Feb 14, 2024View →
SRRK
SCHOLAR ROCK HOLDING CORP
PURCHASE
2,189,781$6.85$15.00M6,788,609Oct 16, 2023Oct 18, 2023View →
MLYS
MINERALYS THERAPEUTICS, INC.
PURCHASE
3,581,8613,581,861Feb 14, 2023Feb 16, 2023View →
MLYS
MINERALYS THERAPEUTICS, INC.
SALE
1,446,3570Feb 14, 2023Feb 16, 2023View →
MLYS
MINERALYS THERAPEUTICS, INC.
PURCHASE
937,500$16.00$15.00M4,519,361Feb 14, 2023Feb 16, 2023View →
MLYS
MINERALYS THERAPEUTICS, INC.
SALE
2,135,5040Feb 14, 2023Feb 16, 2023View →
MLYS
MINERALYS THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
44,00044,000Feb 9, 2023Feb 13, 2023View →
Other insiders · MLYS
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About this filer
CIK 0001699737
ROLE
10% Owner
PRIMARY
MLYS
COMPANIES
5
ACTIVE SINCE
Feb 2023
MARKETPEEL · /INSIDER/0001699737DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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