HolderBook

BAKER BROS. ADVISORS LP

Reported holdings as of Q2 2026, from 31 quarterly filings.

CIK
1263508
Reported value
$20.0B
Positions
84
Top 10 weight
72.8%
Filed
2026-08-14
Days after quarter end
45

Holdings

SecurityTickerValue SharesWeightWeight change Held Change
INCYTE CORPINCY$3.5B30,762,33017.48%+0.86pp31qHELD
BEONE MEDICINES LTDONC$2.5B8,801,56712.57%-2.43pp31qHELD
REVOLUTION MEDICINES INCRVMD$2.1B11,443,35710.74%+5.40pp22q+19.8%+$353.6M
MADRIGAL PHARMACEUTICALS INCMDGL$1.2B2,143,1315.77%-0.67pp31qHELD
ACADIA PHARMACEUTICALS INCACAD$1.1B42,912,9045.44%-0.04pp31qHELD
KYMERA THERAPEUTICS INCKYMR$992.7M8,657,2424.97%+0.83pp24qHELD
INSMED INCINSM$937.8M8,796,1114.70%-2.27pp31q+18.5%+$146.6M
CELCUITY INCCELC$828.2M7,915,7924.15%-1.04pp12qHELD
KODIAK SCIENCES INCKOD$776.1M19,919,1863.89%-0.47pp31qHELD
RHYTHM PHARMACEUTICALS INCRYTM$622.3M5,604,4833.12%+0.32pp31qHELD
PRAXIS PRECISION MEDICINES IPRAX$587.0M1,753,1982.94%-0.30pp10qHELD
ALKERMES PLCALKS$524.6M10,012,2672.63%+0.60pp9qHELD
SUMMIT THERAPEUTICS INCSMMT$477.7M32,786,3482.39%-1.57pp9q-9.9%-$52.5M
GRAIL INCGRAL$275.0M4,028,6141.38%+0.18pp7qHELD
ABCELLERA BIOLOGICS INCABCL$259.1M33,012,1381.30%+0.69pp23q+9.0%+$21.5M
IMMUNOVANT INCIMVT$209.4M5,435,2201.05%+0.27pp12qHELD
IDEAYA BIOSCIENCES INCIDYA$186.7M5,010,0300.94%+0.18pp16q+26.9%+$39.6M
KINIKSA PHARMACEUTICALS INTLKNSA$181.3M2,834,6430.91%+0.13pp9qHELD
ROIVANT SCIENCES LTDROIV$166.9M4,716,8310.84%+0.06pp15q-3.1%-$5.3M
ARROWHEAD PHARMACEUTICALS INARWR$162.4M1,992,7830.81%+0.10pp5qHELD
IONIS PHARMACEUTICALS INCIONS$162.4M2,047,7270.81%-0.07pp4qHELD
EDGEWISE THERAPEUTICS INCEWTX$150.4M3,701,7190.75%-0.44pp22q-43.7%-$116.8M
REPLIMUNE GROUP INCREPL$122.3M11,045,3360.61%+0.13pp25qHELD
NURIX THERAPEUTICS INCNRIX$113.0M4,658,5560.57%+0.15pp24qHELD
STOKE THERAPEUTICS INCSTOK$109.2M3,336,6970.55%-0.08pp16qHELD
MONTE ROSA THERAPEUTICS INCGLUE$105.2M4,345,7360.53%+0.12pp14qHELD
IMMATICS N.VIMTX$96.3M9,508,5650.48%-0.13pp24q-12.9%-$14.3M
DENALI THERAPEUTICS INCDNLI$96.0M3,734,3360.48%+0.07pp26qHELD
CRINETICS PHARMACEUTICALS INCRNX$88.0M2,351,4650.44%-0.05pp5qHELD
DIANTHUS THERAPEUTICS INCDNTH$83.1M852,1640.42%+0.01pp5qHELD
STRUCTURE THERAPEUTICS INCGPCR$76.9M1,432,5290.39%-0.01pp8qHELD
CELCUITY INC$69.2M30,750,0000.35%-0.08pp4qDEBT
RAPPORT THERAPEUTICS INCRAPP$64.5M1,547,0900.32%+0.05pp5qHELD
ALUMIS INCALMS$56.6M2,012,5000.28%+0.03pp9qHELD
PRELUDE THERAPEUTICS INCPRLD$54.0M10,123,8240.27%+0.07pp24qHELD
RELAY THERAPEUTICS INCRLAY$52.9M2,826,7830.27%+0.20pp14q+143.7%+$31.2M
MIRUM PHARMACEUTICALS INCMIRM$52.2M445,9750.26%+0.03pp2qHELD
BICYCLE THERAPEUTICS PLCBCYC$46.2M10,885,3570.23%-0.06pp16qHELD
ENLIVEN THERAPEUTICS INCELVN$45.9M905,1910.23%+0.03pp10qHELD
CELLDEX THERAPEUTICS INC NEWCLDX$44.0M1,182,6110.22%+0.10pp11q+77.7%+$19.2M
VIRIDIAN THERAPEUTICS INCVRDN$43.8M2,383,0250.22%flat5q+20.9%+$7.6M
DESIGN THERAPEUTICS INCDSGN$38.8M2,678,4300.19%+0.04pp22q+3.6%+$1.3M
ENTRADA THERAPEUTICS INCTRDA$37.3M5,072,7300.19%-0.18pp19qHELD
FAETH THERAPEUTICS INCFTH$32.2M1,286,4110.16%-newNEW
AKTIS ONCOLOGY INCAKTS$32.1M996,3510.16%+0.06pp2qHELD
NEUROGENE INCNGNE$31.2M991,6910.16%+0.04pp11qHELD
JADE BIOSCIENCES INCJBIO$27.3M1,230,4260.14%flat3q-25.0%-$9.1M
TAYSHA GENE THERAPIES INCTSHA$27.3M4,004,7560.14%+0.03pp12qHELD
ARCUS BIOSCIENCES INCRCUS$26.0M844,8160.13%+0.08pp3q+103.3%+$13.2M
DISC MEDICINE INCIRON$25.6M349,6570.13%flat7qHELD
ABSCI CORPORATIONABSI$24.7M2,134,8030.12%+0.09pp3qHELD
GENERATE BIOMEDICINES INCGENB$24.0M1,423,6020.12%+0.02pp2qHELD
DBV TECHNOLOGIES S ADBVT$24.0M1,461,4250.12%-0.06pp7qHELD
XENON PHARMACEUTICALS INCXENE$22.3M370,2080.11%-0.01pp25qHELD
TECTONIC THERAPEUTIC INCTECX$20.9M607,7880.10%flat6qHELD
CERUS CORPCERS$18.7M6,395,4310.09%-0.01pp31q-36.1%-$10.5M
CYTOMX THERAPEUTICS INCCTMX$18.7M4,975,8260.09%-0.04pp5qHELD
DYNE THERAPEUTICS INCDYN$18.1M813,4490.09%+0.01pp3qHELD
CYTOKINETICS INCCYTK$18.0M211,2670.09%-newNEW
XENCOR INCXNCR$17.7M1,102,1060.09%+0.01pp15qHELD
SIONNA THERAPEUTICS INCSION$17.6M400,0000.09%flat6qHELD
INTELLIA THERAPEUTICS INCNTLA$15.7M930,2320.08%-newNEW
PARABILIS MEDICINES INCPBLS$13.7M500,0000.07%-newNEW
MAPLIGHT THERAPEUTICS INCMPLT$13.1M364,7050.07%+0.02pp3qHELD
AVALYN PHARMACEUTICALS INCAVLN$11.5M350,0000.06%-newNEW
EVOMMUNE INCEVMN$11.3M847,3900.06%-0.06pp2qHELD
BIONTECH SEBNTX$11.1M119,7430.06%-0.01pp7qHELD
TANGO THERAPEUTICS INCTNGX$10.4M333,3330.05%-newNEW
AVALO THERAPEUTICS INCAVTX$10.2M550,0000.05%-newNEW
SERA PROGNOSTICS INCSERA$10.0M5,498,1700.05%-0.01pp20qHELD
VERASTEM INCVSTM$9.5M2,499,3380.05%+0.03pp2q+327.4%+$7.3M
SAGIMET BIOSCIENCES INCSGMT$7.4M952,9960.04%+0.01pp12qHELD
EIKON THERAPEUTICS INCEIKN$7.2M555,5550.04%flat2qHELD
LB PHARMACEUTICALS INCLBRX$6.5M200,0000.03%flat4qHELD
VTV THERAPEUTICS INCVTVT$5.6M148,3140.03%-0.01pp10qHELD
WAVE LIFE SCIENCES LTDWVE$4.8M822,6380.02%-0.01pp8qHELD
PROTARA THERAPEUTICS INCTARA$3.7M971,6140.02%-0.01pp25qHELD
TSCAN THERAPEUTICS INCTCRX$2.7M2,784,7920.01%flat20qHELD
IMMUNOME INCIMNM$1.2M55,3060.01%-newNEW
SKYE BIOSCIENCE INCSKYE$1.1M1,575,2430.01%flat9qHELD
SANA BIOTECHNOLOGY INCSANA$1.1M310,4830.01%flat14qHELD
ALIGOS THERAPEUTICS INCALGS$479.2K83,0550.00%flat8qHELD
TYRA BIOSCIENCES INCTYRA$338.8K10,6070.00%flat11qHELD
SURROZEN INCSRZNW$13.8K833,3330.00%flat20qHELD

By sector

Industry comes from the SIC code on each company's own SEC filings, which is self-reported and sometimes out of date. Derivative exposure is counted with the shares. Securities the SEC assigns no industry - funds, trusts, foreign issues - are shown as not classified rather than dropped.

Biotech & Pharma 93.9%Healthcare Services 5.6%Other sectors 0.1%Not classified 0.5%
 
SectorValueShare
Biotech & Pharma$18.7B93.9%
Healthcare Services$1.1B5.6%
Other sectors$18.7M0.1%
Not classified$94.4M0.5%

Quarter by quarter

QuarterValuePositions NewAddedTrimmed ExitedTop 10 Days to file
Q2 2026$20.0B848106872.8%45
Q1 2026$17.4B847176973.5%45
Q4 2025$17.1B8692171374.4%48
Q3 2025$13.8B90121351079.1%45
Q2 2025$10.3B88121881281.6%45
Q1 2025$9.0B8849151181.8%45
Q4 2024$9.4B9510184876.5%45
Q3 2024$9.6B936121877.9%45
Q2 2024$7.8B95161310876.3%45
Q1 2024$8.0B87131471077.1%45
Q4 2023$8.8B84522122281.0%45
Q3 2023$17.4B101914111590.2%45
Q2 2023$17.3B107101711887.6%45
Q1 2023$18.4B10571871590.4%45
Q4 2022$16.7B113141681687.0%45
Q3 2022$15.3B115124161484.7%45
Q2 2022$17.6B1175227687.5%46
Q1 2022$17.4B1182134585.0%46
Q4 2021$20.6B1215179683.5%45
Q3 2021$22.8B122121971082.7%46
Q2 2021$22.8B120914101581.6%47
Q1 2021$23.1B1261217151280.5%47
Q4 2020$26.5B126151460984.2%47
Q3 2020$25.0B120141261885.7%47
Q2 2020$22.7B1141518161185.2%45
Q1 2020$16.2B110182218786.3%45
Q4 2019$18.8B99820101885.0%45
Q3 2019$14.7B1099115385.9%45
Q2 2019$14.7B103111517484.4%45
Q1 2019$15.6B967116485.5%45
Q4 2018$12.2B93000086.1%44

Rows marked UNVERIFIED ID, PLACEHOLDER ID, TICKER AS ID or NON-CUSIP ID carry an identifier that is not a valid CUSIP. They are shown because the filer reported that money, but treat the security named with caution - hover the chip for what is wrong with it, and see the methodology.

Held counts consecutive filings in which this manager reported the position, and can reach further back than the quarters listed above: the tabs begin at Q4 2018 because earlier coverage is too sparse to describe a market, but tenure is counted over every filing we hold, some reaching to 2007. A position sold and later rebought starts again from one.

Weight change is the shift in this position's share of the whole book, in percentage points. It is the more useful column: when money flows into or out of a broad fund, almost every holding is bought or sold at once, so added and trimmed largely track flows. A weight that rose while the book shrank is a decision. Both compare with the previous quarter this filer reported, not the previous calendar quarter.