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Palo Alto Investors LP

Q3 2025 · 13F-HR

Palo Alto Investors LPholdings as filed

Filed 2025-11-14 · accession 0001306923-25-000019

$540.4M
Reported value
44
Positions
2025-09-30
Period end
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The Brief · Palo Alto Investors LP · Q3 2025

AI · grounded in 13F

Palo Alto Investors LP established a new position in INSM valued at $70.8M. The fund also initiated new stakes in PTCT for $52.9M and ACAD for $52.6M. Additional new positions include AM6 at $42.3M and BMRN at $40.8M. The fund ended the period with 44 positions and total AUM of $540.4M.

Holdings as filed

CUSIPTickerIssuerValue% port.SharesClassVoting
457669307INSMINSMED INC$70.8M13.1%491,805CommonSOLE
69366J200PTCTPTC THERAPEUTICS INC$52.9M9.80%862,613CommonSOLE
004225108ACADACADIA PHARMACEUTICALS INC$52.6M9.74%2,466,684CommonSOLE
03152W109AM6AMICUS THERAPEUTICS INC$42.3M7.83%5,367,798CommonSOLE
09061G101BMRNBIOMARIN PHARMACEUTICAL INC$40.8M7.56%754,007CommonSOLE
09062X103BIIBBIOGEN INC$26.0M4.81%185,661CommonSOLE
91307C102UTHRUNITED THERAPEUTICS CORP$24.4M4.51%58,186CommonSOLE
032724106ANABANAPTYSBIO INC$20.6M3.82%673,520CommonSOLE
462260100IOVAIOVANCE BIOTHERAPEUTICS INC$16.5M3.06%7,618,132CommonSOLE
G6674U108NVCRNOVOCURE LTD$16.2M3.00%1,256,159CommonSOLE
26818M108DYNDYNE THERAPEUTICS INC$16.0M2.96%1,262,674CommonSOLE
254604101IRONDISC MEDICINE INC$14.8M2.74%224,300CommonSOLE
02043Q107ALNYALNYLAM PHARMACEUTICALS INC$14.7M2.73%32,320CommonSOLE
38341P102GOSSGOSSAMER BIO INC$14.4M2.66%5,464,349CommonSOLE
G72800108PRTAPROTHENA CORP PLC$12.9M2.39%1,324,028CommonSOLE
90400D108RAREULTRAGENYX PHARMACEUTICAL IN$11.1M2.06%369,531CommonSOLE
00847X104AGIOAGIOS PHARMACEUTICALS INC$10.7M1.97%265,497CommonSOLE
87164F105SNDXSYNDAX PHARMACEUTICALS INC$10.1M1.86%654,930CommonSOLE
28238P109EHTHEHEALTH INC$6.7M1.23%1,544,619CommonSOLE
24823R105DNLIDENALI THERAPEUTICS INC$5.9M1.10%408,006CommonSOLE
016255101ALGNALIGN TECHNOLOGY INC$5.7M1.06%45,735CommonSOLE
G01767105ALKSALKERMES PLC$5.5M1.02%183,938CommonSOLE
05370A108RNAGBPAVIDITY BIOSCIENCES INC$4.8M0.89%109,831CommonSOLE
604749101MIRMMIRUM PHARMACEUTICALS INC$4.7M0.88%64,700CommonSOLE
14167L103CDNACAREDX INC$4.6M0.85%316,204CommonSOLE
877619106TSHATAYSHA GENE THERAPIES INC$4.1M0.75%1,246,033CommonSOLE
67080N101NUVBNUVATION BIO INC$3.8M0.70%1,020,547CommonSOLE
00461U105ACRSACLARIS THERAPEUTICS INC$3.0M0.55%1,566,840CommonSOLE
H17182108CRSPCRISPR THERAPEUTICS AG$2.7M0.49%41,226CommonSOLE
89422G107TVTXTRAVERE THERAPEUTICS INC$2.6M0.49%110,719CommonSOLE
28176E108EWEDWARDS LIFESCIENCES CORP$2.6M0.48%33,640CommonSOLE
64125C109NBIXNEUROCRINE BIOSCIENCES INC$2.5M0.47%18,117CommonSOLE
86150R107STOKSTOKE THERAPEUTICS INC$2.5M0.46%105,427CommonSOLE
747324101PYXSPYXIS ONCOLOGY INC$2.3M0.43%1,037,421CommonSOLE
09075V102BNTXBIONTECH SE-ADR$1.9M0.36%19,614CommonSOLE
088786108BCYCBICYCLE THERAPEUTICS PLC-ADR$1.7M0.32%221,071CommonSOLE
01438T106ALDXALDEYRA THERAPEUTICS INC$1.2M0.22%225,465CommonSOLE
444859102HUMHUMANA INC$1.0M0.19%3,985CommonSOLE
687604108ORKAORUKA THERAPEUTICS INC$791,3100.15%59,985CommonSOLE
00289Y206ABEOABEONA THERAPEUTICS INC$574,8070.11%108,865CommonSOLE
M96088105URGNUROGEN PHARMA LTD$488,7750.09%24,500CommonSOLE
N71542109PRQRPROQR THERAPEUTICS NV$402,1590.07%188,807CommonSOLE
00972G207AKTXAKARI THERAPEUTICS PLC-ADR$147,4840.03%146,024CommonSOLE
37148K100GBIOGBXGENERATION BIO CO$92,0880.02%15,047CommonSOLE

Source: SEC EDGAR · raw 13F holdings as filed. The Class column shows the option type when reported (Put/Call) or Common when the issuer's equity is held directly. 13F discloses long positions only.