Stocks/Funds/CIK 1263508

BAKER BROS. ADVISORS LP

long-term holder
Quarterly 13F filings · Latest period 2026-03-31 · CIK 1263508
Assets
$16.13B
+89.2% YoY
Holdings
82
Lifetime alpha vs market
-1.79% annual
Average hold time
3.6 yr
median 2.8 yr

Quarterly history

Cum return +42% vs S&P +52% · α -11% lifetimeAUM $16.1B · peak $26.4BFlow $298M (+2%)2016-062017-122019-062020-122022-062023-122025-062026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
+0.11%
adds when stocks drop
when a holding falls −10%+
Middle response
-1.78%
baseline attrition
Rally response
-0.32%
trims into rallies
when a holding rises +10%+

Top positions · 30

Ticker$ value% portYoYHold time
INCYIncyte Corporation$2.89B17.9%+55.4%10.5 yr
ONCBeOne Medicines Ltd.$2.61B16.2%+9.1%10.3 yr
MDGLMadrigal Pharmaceuticals$1.12B7.0%+58.0%9.8 yr
ACADACADIA Pharmaceuticals I$955M5.9%+34.0%10.5 yr
RVMDRevolution Medicines, In$929M5.8%+175.0%5.3 yr
CELCCelcuity Inc.$904M5.6%+1029.0%2.8 yr
KODKodiak Sciences Inc.$759M4.7%+1256.6%7.5 yr
KYMRKymera Therapeutics, Inc$721M4.5%+204.3%5.8 yr
SMMTSummit Therapeutics Inc.$690M4.3%-1.7%3.0 yr
$565M3.5%2.3 yr
RYTMRhythm Pharmaceuticals, $487M3.0%+64.2%8.5 yr
ALKSAlkermes plc$354M2.2%+7.1%9.0 yr
GRALGRAIL, Inc.$208M1.3%+102.3%1.5 yr
EWTXEdgewise Therapeutics, I$207M1.3%+43.2%5.3 yr
IONSIonis Pharmaceuticals, I$154M1.0%+148.9%2.8 yr

Portfolio composition (YoY)

Industry mix
Biotechnology77.6%+7.8pp$12.51B
Medical - Pharmaceuticals16.2%-11.9pp$2.61B
Unknown4.6%+3.4pp$739M
Medical - Diagnostics & Research1.4%+0.6pp$219M
Medical - Devices0.1%-0.2pp$18M
Asset Management0.1%$18M
Medical - Care Facilities0.1%$13M
Country
US89.3%-2.8pp
Unknown4.6%+3.4pp
IE2.2%+0.5pp
GB1.5%-1.2pp
CA0.8%-0.1pp
DE0.7%+0.3pp
FR0.6%
NL0.2%-0.5pp
Top 5: 52.8% · Top 10: 75.3% · Top 25: 91.3%

Winners

TickerPrev $PnLYoY %
INCY$1.86B+1.03B55.4%
KOD$49M+0.61B1256.6%
RVMD$281M+0.49B175.0%
CELC$43M+0.44B1029.0%
MDGL$654M+0.38B58.0%

Losers

TickerPrev $PnLYoY %
REPL$108M-0.02B-21.5%
SMMT$471M-0.01B-1.7%

Top buys this quarter · 15

GRAL GRAIL, Inc.+$100M
CRNX Crinetics Pharmaceuticals, Inc+$26M
ELVN Enliven Therapeutics, Inc.+$25M
MIRM Mirum Pharmaceuticals, Inc.+$24M
EVMN Evommune, Inc.new+$19M
IONS Ionis Pharmaceuticals, Inc.+$19M
AKTS Aktis Oncology, Inc.new+$18M
GENB Generate Biomedicines, Inc.new+$18M
CMPS COMPASS Pathways plcnew+$13M
IDYA IDEAYA Biosciences, Inc.+$11M

Top sells this quarter · 15

RARE Ultragenyx Pharmaceutical Inc.exit$58M
IMCR Immunocore Holdings plc$48M
VTYX Ventyx Biosciences, Inc.exit$33M
BCRX BioCryst Pharmaceuticals, Inc.exit$27M
BNTX BioNTech SE$22M
ROIV Roivant Sciences Ltd.$121M
NUVL Nuvalent, Inc.exit$15M
IMTX Immatics N.V.$12M
ARWR Arrowhead Pharmaceuticals, Inc$11M
TECX Tectonic Therapeutic, Inc.$9M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$16.13B82+60.09%+17.59%+42.49%+0.30B
2025-12-31$15.86B84+57.74%+17.72%+40.02%+0.76B
2025-09-30$12.83B88+30.18%+17.52%+12.67%+0.39B
2025-06-30$9.53B87+21.49%+14.94%+6.55%+0.63B
2025-03-31$8.52B86+10.93%+8.30%+2.62%-0.22B
2024-12-31$8.89B92+2.87%+24.89%-22.01%-0.07B
2024-09-30$9.23B91+20.37%+36.04%-15.67%+0.17B
2024-06-30$7.44B92-9.87%+24.49%-34.36%-0.15B
2024-03-31$7.96B86-10.66%+29.62%-40.28%+0.08B
2023-12-31$8.64B81-8.49%+26.18%-34.67%-10.93B
2023-09-30$17.21B99-5.92%+21.57%-27.49%+1.58B
2023-06-30$17.14B105-5.01%+19.42%-24.43%-0.22B
2023-03-31$18.37B104-10.78%-7.82%-2.97%+2.85B
2022-12-31$16.62B110+16.89%+7.56%+9.32%-1.17B
2022-09-30$15.22B112-7.90%-4.93%-2.97%-0.90B
2022-06-30$17.51B113-11.26%-16.11%+4.85%+2.18B