Ra Capital Management, L.P.

Director

Ra Capital Management, L.P. (Director) filed 31 Form 4 reports as a reporting entity in the trailing twelve months (23 purchases, 8 sales, 1 filed past the two-business-day deadline), most often in Artiva Biotherapeutics, Inc. (ARTV). Across 22 priced purchase filings, the average 21-session return was +16.2% from execution and +14.2% from disclosure (delay-adjusted; derived). The largest single filing was $423.8M of PBLS (21,188,750 sh across 2 lots, as filed), executed Jun 11. Data as of Nov 7 2026.

Add to watchlist

Return, ttmiAverage return per filing, trailing twelve months

+16.2%

avg across 22 priced filings

Delay-adjustediThe same average, entered at disclosure dates

+14.2%

same 22 filings, from disclosure

Filings, ttm

23 buys · 8 sells · 1 late

Median delay

execution → disclosure

Volume, ttmiDollar value disclosed in the trailing twelve months

$871.5M

shares × price, as filed

Last traded

Nov 2

Filed Nov 3

Median ADV $10.0M across their filed names

Impact on $10,000 · 12M

$25,798 (+158.0%)

S&P 500 $10,907 (+9.1%) · 148.9 pts ahead

Ra Capital Management, L.P. S&P 500

Derived: compounded across filings from disclosure dates · past 12 months

Open performance→

Volume by month

Buys $856.6M Sells $128.1M

Shares × price, as filed · by filing month · past 24 months

Sectors filed on

Healthcare 25 filings Not on file 5 filings

Sector per market data · by filing · past 12 months

Most traded names

ARTV

Artiva Biotherapeutics, Inc. ARTV · 9 buys · 0 sells 9 filings COAG

Hemab Therapeutics Holdings, Inc. COAG · 4 buys · 0 sells 4 filings SION

Sionna Therapeutics, Inc. SION · 1 buy · 2 sells 3 filings VOR VOR 0 buys · 3 sells 3 filings HOWL

Werewolf Therapeutics, Inc. HOWL · 0 buys · 2 sells 2 filings

Recent filings

ARTVPURCHASE Artiva Biotherapeutics, Inc. View filing → $1.4M
152,472 sh × $8.93
Exec Jul 16
Filed Jul 20 · 6:08 PM ET ARTVPURCHASE Artiva Biotherapeutics, Inc. View filing → $135K
15,102 sh × $8.97
Exec Jul 10
Filed Jul 14 · 7:00 PM ET ARTVPURCHASE Artiva Biotherapeutics, Inc. View filing → $275K
31,000 sh × $8.88
Exec Jun 25
Filed Jun 29 · 4:20 PM ET HOWLSALE Werewolf Therapeutics, Inc. View filing → $136K
389,216 sh × $0.35
Exec Jun 17
Filed Jun 22 · 5:30 PM ET COAGPURCHASE Hemab Therapeutics Holdings, Inc. View filing → $1.7M
67,669 sh across 2 lots
Exec Jun 15
Filed Jun 17 · 6:24 PM ET ARTVPURCHASE Artiva Biotherapeutics, Inc. View filing → $4.6M
531,326 sh across 3 lots
Exec Jun 12
Filed Jun 16 · 6:08 PM ET PBLSPURCHASE Parabilis Medicines, Inc. View filing → $423.8M
21,188,750 sh across 2 lots
Exec Jun 11
Filed Jun 15 · 6:57 PM ET ARTVPURCHASE Artiva Biotherapeutics, Inc. View filing → $7.6M
1,027,619 sh across 2 lots
Exec Jun 9
Filed Jun 11 · 7:36 PM ET More filings →