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  • RA CAPITAL MANAGEMENT, L.P. (Data extracted from 13F, 13D, 13G and Form 4)

RA CAPITAL MANAGEMENT, L.P.

AUM: $11.32 B
13-F Portfolio Value: $9.44 B
Last 13-F Filed: Q1 2026
Concentration in top 10: 61.29%
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Stock Company % Portfolio Shares Held Market Value Change in Shares % Change Quarter End Price Source
PBLSParabilis Medicines, Inc.4.34%26,285,093$525,701,86026,285,093NewForm 4
SGPSPYGLASS PHARMA INC1.73%8,021,117$207,827,1418,021,117New$25.9113F
COAGHemab Therapeutics Holdings, Inc.1.68%7,808,628$195,059,5277,808,628NewForm 4
ZLABZAI LAB LTD-ADR0.89%5,707,262$107,353,5985,707,262New$18.8113F
SRPTSAREPTA THERAPEUTICS INC0.70%3,902,596$84,920,4893,902,596New$21.7613F
IKTInhibikase Therapeutics, Inc.0.54%25,000,000$51,000,00025,000,000New13G
SANASana Biotechnology, Inc.0.54%18,750,000$58,875,00018,750,000New13G
DMRADAMORA THERAPEUTICS INC0.52%2,399,310$62,142,1292,399,310New$25.913F
XNCRXENCOR INC0.49%4,897,237$59,060,6784,897,237New$12.0613F
ALTAltimmune, Inc.0.33%13,000,000$37,050,00013,000,000New13G
IPSCCENTURY THERAPEUTICS INC0.33%17,754,430$40,125,01217,754,430New$2.2613F
EDITEditas Medicine, Inc.0.29%8,889,000$31,733,7308,889,000New13G
AGENAgenus Inc.0.28%4,344,772$26,590,0054,344,772New13G
PRLDPrelude Therapeutics Incorporated0.27%6,477,309$29,925,1686,477,309New13G
BIOABIOAGE LABS INC0.24%1,650,648$28,869,8341,650,648New$17.4913F
MIRMMIRUM PHARMACEUTICALS INC0.24%318,554$29,428,019318,554New$92.3813F
ALXOALX ONCOLOGY HOLDINGS INC0.22%13,011,849$26,088,75713,011,849New$213F
AKTSAKTIS ONCOLOGY INC0.22%1,503,084$26,890,1731,503,084New$17.8913F
QTTBQ32 Bio Inc.0.22%2,332,457$24,047,6322,332,457New13G
ACRSACLARIS THERAPEUTICS INC0.21%6,804,072$25,515,2706,804,072New$3.7513F
TVTXTRAVERE THERAPEUTICS INC0.18%746,841$22,188,646746,841New$29.7113F
RLMDRELMADA THERAPEUTICS INC0.17%2,947,369$20,513,6882,947,369New$6.9613F
DRUGBRIGHT MINDS BIOSCIENCES INC0.16%265,000$19,337,050265,000New$72.9713F
STROSUTRO BIOPHARMA INC0.15%715,307$17,818,297715,307New$24.9113F
AVRANTERIS TECHNOLOGIES GLOBAL0.14%3,000,000$16,650,0003,000,000New$5.5513F
OKURONKURE THERAPEUTICS INC-A0.14%3,998,333$16,553,0993,998,333New$4.1413F
HLXCHELIX ACQUISITION CORP-CL A0.11%1,250,000$12,700,0001,250,000New$10.1613F
RNAATRIUM THERAPEUTICS INC0.10%864,102$11,553,044864,102New$13.3713F
KPTIKARYOPHARM THERAPEUTICS INC0.09%1,917,354$10,679,6621,917,354New$5.5713F
CRVSCORVUS PHARMACEUTICALS INC0.05%450,000$6,583,500450,000New$14.6313F
EQEQUILLIUM INC0.05%3,096,336$6,192,6723,096,336New$213F
MGNXMACROGENICS INC0.04%1,864,176$5,387,4691,864,176New$2.8913F
MPLTMAPLIGHT THERAPEUTICS INC0.04%248,294$5,047,817248,294New$20.3313F
JATTJATT II Acquisition Corp0.04%500,000$4,080,000500,000New13G