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Ra Capital Management, L.P.

Form 13F · CIK 1346824. Holdings on 30 Jun 2026, as filed with the SEC on 14 Aug 2026, each set beside the March 2026 quarter. The 13F on the SEC's site.

Ra Capital Management, L.P. reported 84 positions worth $11.5B for the June 2026 quarter, on a Form 13F filed 14 Aug 2026; the largest holding was Ascendis Pharma A/s, at 23.8% of the fund.

What it bought and sold

The largest moves since the March 2026 quarter, by the dollars that moved: 16 opened, 9 added, 10 trimmed, 17 sold out.

New position: 16

CompanyValueChange in shares
Parabilis Medicines Inc. Com (PBLS)$791.9M+28,933,371
Hemab Therapeutics Hldgs Inc. (COAG)$286.8M+7,808,627
Abivax SA (ABVX)$150.9M+1,132,557
Oruka Therapeutics Inc. (ORKA)$148.0M+1,554,597
Intellia Therapeutics, Inc. (NTLA)$76.6M+4,526,926
Definium Therapeutics Inc. (DFTX)$70.6M+1,500,000
Sana Biotechnology Inc. (SANA)$65.4M+18,750,000
Prelude Therapeutics Inc. (PRLD)$34.5M+6,475,882
Q32 Bio Inc. (QTTB)$29.7M+2,332,457
Editas Medicine, Inc. (EDIT)$28.8M+8,889,000

Added: 9

CompanyValueChange in shares
Artiva Biotherapeutics Inc. (ARTV)$174.2M+8,102,340
Solid Biosciences Inc. (SLDB)$120.2M+2,696,148
Aclaris Therapeutics, Inc. (ACRS)$67.3M+5,918,954
Xencor Inc. (XNCR)$84.9M+377,037
Rezolute Inc. (RZLT)$49.1M+265,039
Bioage Labs Inc. (BIOA)$41.0M+21,000
Acrivon Therapeutics Inc. (ACRV)$21.8M+3,888,888
Avalo Therapeutics Inc. (AVTX)$18.5M+337,032
Zai Lab Limited (ZLAB)$109.1M+36,271

Trimmed: 10

CompanyValueChange in shares
Nuvalent Inc. (NUVL)$153.9M-1,287,689
GH Research PLC (GHRS)$205.3M-39,884
Vor Biopharma Inc. (VOR)$44.2M-3,002,903
Geron Corp. (GERN)$54.8M-20,961,615
Aktis Oncology, Inc. (AKTS)$42.4M-188,679
Edgewise Therapeutics Inc. (EWTX)$341.0M-2,035,707
Werewolf Therapeutics Inc. (HOWL)$859.3K-4,293,563
Ovid Therapeutics Inc. (OVID)$28.2M-213,032
Palatin Technologies Inc. (PTN)$670.3K-7,876
Adicet Bio Inc. (ACET)$8.1M-250,000

Sold out: 17

CompanyValue a quarter beforeChange in shares
Dianthus Therapeutics Inc. (DNTH)$219.2M-2,611,733
Praxis Precision Medicines I (PRAX)$120.4M-373,787
Sarepta Therapeutics, Inc. (SRPT)$84.9M-3,902,596
Spyre Therapeutics Inc. (SYRE)$81.8M-1,621,620
Fulcrum Therapeutics Inc. (FULC)$46.4M-6,053,960
Olema Pharmaceuticals Inc. (OLMA)$38.8M-2,600,000
Design Therapeutics, Inc. (DSGN)$31.6M-2,972,973
Travere Therapeutics, Inc. (TVTX)$22.2M-746,841
Grail, Inc. (GRAL)$22.1M-428,266
Relmada Therapeutics Inc. (RLMD)$20.5M-2,947,369

Largest holdings

Every holding, by value.

CompanyValueOf the fundSharesChange in sharesMove
Ascendis Pharma A/s (ASND)$2.7B23.83%10,281,4960Held
Parabilis Medicines Inc. Com (PBLS)$791.9M6.88%28,933,371+28,933,371New position
Rhythm Pharmaceuticals, Inc. (RYTM)$740.2M6.43%6,666,8370Held
Vaxcyte Inc. (PCVX)$667.0M5.80%11,474,5990Held
Sionna Therapeutics Inc (SION)$435.7M3.79%9,905,0450Held
Tyra Biosciences Inc. (TYRA)$389.6M3.39%12,198,6250Held
Edgewise Therapeutics Inc. (EWTX)$341.0M2.96%8,392,730-2,035,707Trimmed
NewAmsterdam Pharma Co. N.V. (NAMS)$323.7M2.81%9,550,1910Held
Hemab Therapeutics Hldgs Inc. (COAG)$286.8M2.49%7,808,627+7,808,627New position
Septerna, Inc. (SEPN)$234.3M2.04%6,995,8580Held
Bicara Therapeutics Inc. (BCAX)$215.4M1.87%7,255,9930Held
Mineralys Therapeutics Inc. (MLYS)$207.6M1.80%7,692,7500Held
GH Research PLC (GHRS)$205.3M1.78%7,636,813-39,884Trimmed
Disc Medicine Inc. (IRON)$179.2M1.56%2,450,2210Held
Spyglass Pharma Inc. (SGP)$178.6M1.55%8,021,1170Held
Artiva Biotherapeutics Inc. (ARTV)$174.2M1.51%17,955,642+8,102,340Added
Janux Therapeutics, Inc. (JANX)$171.9M1.49%11,189,6930Held
Taysha Gene Therapies, Inc. (TSHA)$160.4M1.39%23,555,6480Held
Biocryst Pharmaceuticals Inc. (BCRX)$158.3M1.38%15,827,1860Held
Wave Life Sciences, Inc. (WVE)$156.7M1.36%26,975,5050Held
Nuvalent Inc. (NUVL)$153.9M1.34%1,246,456-1,287,689Trimmed
Abivax SA (ABVX)$150.9M1.31%1,132,557+1,132,557New position
Oruka Therapeutics Inc. (ORKA)$148.0M1.29%1,554,597+1,554,597New position
Eliem Therapeutics Inc. (CLYM)$147.4M1.28%11,300,9390Held
Solid Biosciences Inc. (SLDB)$120.2M1.04%12,036,126+2,696,148Added
Zai Lab Limited (ZLAB)$109.1M0.95%5,743,533+36,271Added
Ars Pharmaceuticals Inc. (SPRY)$87.0M0.76%10,860,9770Held
Xencor Inc. (XNCR)$84.9M0.74%5,274,274+377,037Added
Jade Biosciences Inc. (JBIO)$81.6M0.71%3,671,0830Held
Intellia Therapeutics, Inc. (NTLA)$76.6M0.67%4,526,926+4,526,926New position
LB Pharmaceuticals Inc. (LBRX)$71.7M0.62%2,208,6040Held
Definium Therapeutics Inc. (DFTX)$70.6M0.61%1,500,000+1,500,000New position
Aclaris Therapeutics, Inc. (ACRS)$67.3M0.58%12,723,026+5,918,954Added
4D Molecular Therapeutics in (FDMT)$67.2M0.58%5,049,7790Held
Sana Biotechnology Inc. (SANA)$65.4M0.57%18,750,000+18,750,000New position
Galecto Inc. (DMRA)$62.4M0.54%2,399,702+392Held
Monopar Therapeutics (MNPR)$61.8M0.54%667,2070Held
Acumen Pharmaceuticals Inc. (ABOS)$56.1M0.49%20,992,6690Held
Geron Corp. (GERN)$54.8M0.48%42,809,751-20,961,615Trimmed
Rezolute Inc. (RZLT)$49.1M0.43%9,445,039+265,039Added
Evommune Inc. (EVMN)$46.4M0.40%3,494,6380Held
Vor Biopharma Inc. (VOR)$44.2M0.38%2,402,095-3,002,903Trimmed
Century Therapeutics Inc. (IPSC)$43.5M0.38%17,754,4300Held
Aktis Oncology, Inc. (AKTS)$42.4M0.37%1,314,405-188,679Trimmed
Bioage Labs Inc. (BIOA)$41.0M0.36%1,671,648+21,000Added
C4 Therapeutics Inc. (CCCC)$37.4M0.33%8,000,0000Held
Mirum Pharmaceuticals, Inc. (MIRM)$37.3M0.32%318,5540Held
Capricor Therapeutics Inc. (CAPR)$36.3M0.32%1,507,8440Held
Pepgen Inc. (PEPG)$36.1M0.31%20,064,5450Held
Prelude Therapeutics Inc. (PRLD)$34.5M0.30%6,475,882+6,475,882New position
Nkarta Inc. (NKTX)$30.6M0.27%10,805,1290Held
Q32 Bio Inc. (QTTB)$29.7M0.26%2,332,457+2,332,457New position
Anteris Technologies Global Corp. (AVR)$29.6M0.26%3,000,0000Held
Editas Medicine, Inc. (EDIT)$28.8M0.25%8,889,000+8,889,000New position
Ovid Therapeutics Inc. (OVID)$28.2M0.24%10,500,968-213,032Trimmed
Assembly Biosciences Inc. (ASMB)$28.0M0.24%1,020,4100Held
Alx Oncology Holdings Inc. (ALXO)$26.9M0.23%13,011,8490Held
Benitec Biopharma Inc. (BNTC)$24.8M0.21%1,850,0000Held
Lenz Therapeutics Inc. (LENZ)$23.7M0.21%4,178,8230Held
Lexeo Therapeutics Inc. (LXEO)$23.3M0.20%5,000,0000Held
Acrivon Therapeutics Inc. (ACRV)$21.8M0.19%12,229,396+3,888,888Added
Altimmune, Inc. (alt) (ALT)$19.8M0.17%6,500,000+6,500,000New position
Karyopharm Therapeutics Inc. (KPTI)$18.7M0.16%1,917,3540Held
Bright Minds Biosciences Inc. (DRUG)$18.6M0.16%265,0000Held
Avalo Therapeutics Inc. (AVTX)$18.5M0.16%1,000,000+337,032Added
Onkure Therapeutics Inc (OKUR)$18.2M0.16%3,998,3330Held
Sensei Biotherapeutics Inc. (FTH)$18.1M0.16%722,020+722,020New position
Aura Biosciences Inc. (AURA)$17.8M0.15%2,500,000+2,500,000New position
Sab Biotherapeutics Inc. (SABS)$17.2M0.15%4,401,5000Held
Seaport Therapeutics Inc. (SPTX)$15.2M0.13%700,000+700,000New position
Palisade Bio Inc. (PALI)$14.9M0.13%7,124,1160Held
Helix Acquisition Corp. III (HLXC)$13.3M0.12%1,250,0000Held
Waystar Holding Corp. (WAY)$10.9M0.09%529,4000Held
Equillium Inc. (EQ)$9.9M0.09%3,096,3360Held
Macrogenics Inc. (MGNX)$8.6M0.07%1,864,1760Held
Perceptive Cap Solutions Cor (PCSC)$8.2M0.07%750,0000Held
Adicet Bio Inc. (ACET)$8.1M0.07%932,624-250,000Trimmed
Newamsterdam Pharma Company$7.1M0.06%333,3330Held
Corvus Pharmaceuticals Inc. (CRVS)$6.7M0.06%450,0000Held
Rani Therapeutics Holdings-A (RANI)$6.5M0.06%8,500,0000Held
Jatt II Acquisition Corp. (JATT)$5.7M0.05%500,000+500,000New position
Amanat Acquisition Corp. (AMAN)$3.8M0.03%375,000+375,000New position
Werewolf Therapeutics Inc. (HOWL)$859.3K0.01%2,387,744-4,293,563Trimmed
Palatin Technologies Inc. (PTN)$670.3K0.01%62,124-7,876Trimmed

Every quarter it filed

What the fund reported and how many positions it held, each quarter since September 2024.

QuarterReported valuePositions
June 2026 quarter$11.5B84
March 2026 quarter$9.4B85
December 2025 quarter$9.8B71
September 2025 quarter$8.1B67
June 2025 quarter$5.9B63
March 2025 quarter$6.0B85
December 2024 quarter$7.5B89
September 2024 quarter$8.7B81
Every 13F fund · Fund holdings data