WhaleCreep
HomeFunds › Catalio Capital Management, LP

Catalio Capital Management, LP: 13F holdings, Q2 2026

Hedge fund · SEC EDGAR filings (CIK 1958125) · Explore on the interactive board

Catalio Capital Management, LP disclosed 39 US equity positions worth $532.1m in its Q2 2026 13F filing (holdings as of June 30, 2026, filed August 14, 2026). Its largest position is AVALYN PHARMACEUTICALS INC at 10.4% of the reported book, followed by JNJ, GILD. The top ten holdings are 56.7% of the book, and the portfolio behaves like about 22 equal-weight positions. Versus the prior filing it opened 11 new positions, added to 15, reduced 8 and exited 13. Note: this manager's most recent filing is 3934 quarters behind the newest quarter on file, so these figures are history rather than current positioning.

This manager's most recent filing is 3934 quarter(s) behind the newest quarter on file. Treat these figures as history, not current positioning.
$532.1mreported US equity book
39positions
10.4%largest position
56.7%top 10 weight
22.27effective positions (1/HHI)
2quarters on file since Q1 2026

What does Catalio Capital Management, LP own? Top holdings as of June 30, 2026

Change is measured in shares against the previous filing (Q1 2026), so price moves do not read as decisions. This quarter: 11 new, 15 added, 8 reduced, 13 exited.

#StockSectorWeightValueSharesΔ sharesAction
1 AVALYN PHARMACEUTICALS INC 10.4%$55.2m1,675,830 new
2 JNJ JOHNSON & JOHNSON Healthcare 6.6%$35.3m138,946 new
3 GILD GILEAD SCIENCES INC Healthcare 6.4%$34.0m269,309 64% added
4 BBIO BRIDGEBIO PHARMA INC Healthcare 6.4%$33.9m455,041 5% added
5 SNDX SYNDAX PHARMACEUTICALS INC Healthcare 5.0%$26.6m1,215,698 16% added
6 DFTX DEFINIUM THERAPEUTICS INC Healthcare 5.0%$26.5m562,672 -46% reduced
7 BMY BRISTOL-MYERS SQUIBB CO Healthcare 4.5%$23.8m412,961 -2% reduced
8 PARABILIS MEDICINES INC 4.2%$22.6m824,043 new
9 NTRA NATERA INC Healthcare 4.2%$22.3m82,181 16% added
10 INCY INCYTE CORP Healthcare 4.1%$21.7m191,627 5% added
11 SEPN SEPTERNA INC Healthcare 3.4%$18.0m536,152 82% added
12 MLYS MINERALYS THERAPEUTICS INC Healthcare 3.3%$17.5m648,722 48% added
13 HTFL HEARTFLOW INC Healthcare 3.2%$17.1m583,055 44% added
14 CRVS CORVUS PHARMACEUTICALS INC Healthcare 3.0%$16.1m1,080,888 21% added
15 GPCR STRUCTURE THERAPEUTICS INC Healthcare 2.8%$14.8m276,550 8% added
16 PTGX PROTAGONIST THERAPEUTICS INC Healthcare 2.5%$13.1m106,799 new
17 IRON DISC MEDICINE INC Healthcare 2.2%$11.7m159,384 30% added
18 EW EDWARDS LIFESCIENCES CORP Healthcare 2.1%$11.3m124,778 -14% reduced
19 AXSM AXSOME THERAPEUTICS INC. Healthcare 2.0%$10.6m43,182 new
20 RARE ULTRAGENYX PHARMACEUTICAL IN Healthcare 2.0%$10.6m316,252 -63% reduced
21 KAILERA THERAPEUTICS INC 1.9%$10.3m468,750 new
22 KPTI KARYOPHARM THERAPEUTICS INC 1.7%$9.2m940,855 5% added
23 ODYSSEY THERAPEUTICS INC 1.6%$8.6m457,839 new
24 ASND ASCENDIS PHARMA A/S Healthcare 1.6%$8.5m31,759 new
25 KARD KARDIGAN INC 1.4%$7.5m312,500 new
26 ELDN ELEDON PHARMACEUTICALS INC 1.3%$6.7m1,695,071 3% added
27 FDMT 4D MOLECULAR THERAPEUTICS IN Healthcare 1.2%$6.3m471,254 new
28 MANE VERADERMICS INC Healthcare 1.1%$5.6m45,856 -74% reduced
29 DYN DYNE THERAPEUTICS INC Healthcare 1.0%$5.4m244,929 -13% reduced
30 GUTS FRACTYL HEALTH INC 0.9%$4.9m6,168,749 12% added
31 IMCR IMMUNOCORE HLDGS PLC Healthcare 0.9%$4.7m148,045 76% added
32 DNTH DIANTHUS THERAPEUTICS INC Healthcare 0.6%$3.2m32,941 -94% reduced
33 BBOT BRIDGEBIO ONCOLOGY THERAPEUT 0.5%$2.4m318,407 new
34 TARA PROTARA THERAPEUTICS INC 0.4%$2.0m520,148 -10% reduced
35 HYPR HYPERFINE INC 0.3%$1.8m1,320,041 0% held
36 ATAI ATAIBECKLEY INC 0.2%$1.0m196,858 0% held
37 MGX METAGENOMI THERAPEUTICS INC 0.1%$629.5k528,993 0% held
38 OM OUTSET MED INC 0.1%$511.0k118,279 0% held
39 FTH FAETH THERAPEUTICS INC 0.1%$367.9k14,718 0% held

What did Catalio Capital Management, LP sell? Positions exited since the previous filing

StockPrior weightPrior value
ASND ASCENDIS PHARMA A/S20.2%$29.5m
430 TERNS PHARMACEUTICALS INC14.7%$21.6m
SLNOEUR SOLENO THERAPEUTICS INC13.2%$19.3m
BSX BOSTON SCIENTIFIC CORP12.8%$18.8m
CYTK CYTOKINETICS INC9.7%$14.2m
ADPT ADAPTIVE BIOTECHNOLOGIES COR6.8%$10.0m
4XC1 KALVISTA PHARMACEUTICALS INC5.9%$8.6m
UNIQURE NV5.5%$8.0m
ABVX ABIVAX SA3.6%$5.3m
SUPN SUPERNUS PHARMACEUTICALS2.2%$3.2m
PHAT PHATHOM PHARMACEUTICALS INC1.9%$2.8m
NEWAMSTERDAM PHARMA COMPANY1.8%$2.7m
TYRA TYRA BIOSCIENCES INC1.8%$2.6m

Sector mix

SectorWeight
Healthcare74.9%

Sectors cover positions whose ticker resolved to a sector; the remainder is unclassified, not cash.

Filing history

QuarterPositionsEquity value
Q2 202639$532.1m
Q1 202641$478.7m

How concentrated is Catalio Capital Management, LP's portfolio?

Across every quarter Catalio Capital Management, LP has filed, its median largest position is 10.1% of the book and its median top-ten weight is 55.6%, which WhaleCreep classifies as concentrated (the gate is a median largest position of 5%). Of 12.0 completed holding spells, the median lasted 1.0 quarters; 39.0 positions are still open and their final length is unknown.