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Third Rock Ventures V, L.p.

SEPN
10% OWNER · SEPTERNA, INC. · CIK 0001778071
FILING MIX · LIFETIME44%/56%
BUYS
11
SELLS
14
TOTAL VALUE
$52.37M
COMPANIES
3
ACTIVE SINCE
Jun 2024
HOLDINGS NOW
14,966,142
AVG SELL PX
$40.24
TRADE KIND
SHOWING 25 / 25
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
6 backtested trades · 8 horizons · 10 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Third Rock Ventures V, 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
7d6+66.67%+7.51%-1.75%+9.26%+10.26%
14d6+100.00%+10.53%-2.03%+15.36%+14.87%
30d6+100.00%+8.54%-1.61%+10.15%+12.75%
60d6(1 pending)+80.00%+11.89%-5.87%+17.77%+19.29%
90d6(1 pending)+60.00%+26.68%-0.48%+27.16%+58.04%
180d6(1 pending)+60.00%+29.66%+2.20%+27.45%+80.43%
1y6(1 pending)+100.00%+237.44%+16.42%+221.02%+349.87%
2y6(6 pending)
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
SEPN · 4,211,659 shares · as of Feb 24, 2025
01,553,8983,107,7964,661,6936,215,5912025SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 11 buys / 14 sellsCOVERAGE · 9 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
RAPP
RAPPORT THERAPEUTICS, INC.
SALE10b5-1
10b5-1 plan
18,572$40.05$743.8K6,280,525May 26, 2026May 28, 2026View →
RAPP
RAPPORT THERAPEUTICS, INC.
SALE10b5-1
10b5-1 plan
133,618$40.24$5.38M6,299,097May 11, 2026May 13, 2026View →
RAPP
RAPPORT THERAPEUTICS, INC.
SALE10b5-1
10b5-1 plan
5,018$40.31$202.3K6,432,715May 8, 2026May 11, 2026View →
RAPP
RAPPORT THERAPEUTICS, INC.
SALE10b5-1
10b5-1 plan
271,495$40.12$10.89M6,437,733May 7, 2026May 11, 2026View →
RAPP
RAPPORT THERAPEUTICS, INC.
SALE10b5-1
10b5-1 plan
426,005$40.32$17.18M6,709,228Apr 17, 2026Apr 21, 2026View →
MAZE
MAZE THERAPEUTICS, INC.
SALE
1,600,0004,473,958Nov 4, 2025Nov 5, 2025View →
SEPN
SEPTERNA, INC.
PURCHASE
18,861$6.00$113.1K4,211,659Feb 24, 2025Feb 26, 2025View →
SEPN
SEPTERNA, INC.
PURCHASE
427,668$5.94$2.54M4,192,798Feb 21, 2025Feb 24, 2025View →
SEPN
SEPTERNA, INC.
PURCHASE
612,674$5.92$3.63M3,765,130Feb 20, 2025Feb 24, 2025View →
MAZE
MAZE THERAPEUTICS, INC.
PURCHASE
950,800950,800Feb 3, 2025Feb 4, 2025View →
MAZE
MAZE THERAPEUTICS, INC.
SALE
45,833,3340Feb 3, 2025Feb 4, 2025View →
MAZE
MAZE THERAPEUTICS, INC.
SALE
9,725,7090Feb 3, 2025Feb 4, 2025View →
MAZE
MAZE THERAPEUTICS, INC.
SALE
9,166,6660Feb 3, 2025Feb 4, 2025View →
MAZE
MAZE THERAPEUTICS, INC.
PURCHASE
5,762,7886,073,958Feb 3, 2025Feb 4, 2025View →
SEPN
SEPTERNA, INC.
PURCHASE
4,790,7735,845,091Oct 28, 2024Oct 28, 2024View →
SEPN
SEPTERNA, INC.
SALE
24,737,0170Oct 28, 2024Oct 28, 2024View →
SEPN
SEPTERNA, INC.
SALE
41,250,0000Oct 28, 2024Oct 28, 2024View →
SEPN
SEPTERNA, INC.
PURCHASE
370,500$18.00$6.67M6,215,591Oct 28, 2024Oct 28, 2024View →
SEPN
SEPTERNA, INC.
PURCHASE
279,500$18.00$5.03M3,152,456Oct 28, 2024Oct 28, 2024View →
SEPN
SEPTERNA, INC.
PURCHASE
2,872,9562,872,956Oct 28, 2024Oct 28, 2024View →
RAPP
RAPPORT THERAPEUTICS, INC.
PURCHASE
6,551,4497,135,233Jun 10, 2024Jun 10, 2024View →
RAPP
RAPPORT THERAPEUTICS, INC.
SALE
298,1030Jun 10, 2024Jun 10, 2024View →
RAPP
RAPPORT THERAPEUTICS, INC.
SALE
8,000,0000Jun 10, 2024Jun 10, 2024View →
RAPP
RAPPORT THERAPEUTICS, INC.
SALE
56,091,1770Jun 10, 2024Jun 10, 2024View →
RAPP
RAPPORT THERAPEUTICS, INC.
PURCHASE
969,218969,218Jun 10, 2024Jun 10, 2024View →
Other insiders · SEPN
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About this filer
CIK 0001778071
ROLE
10% Owner
PRIMARY
SEPN
COMPANIES
3
ACTIVE SINCE
Jun 2024
MARKETPEEL · /INSIDER/0001778071DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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