Q2 2026 13F · SEC CIK 2081629

O'Connor Alternative Investments LLC

Hedge fundFiled 2026-08-14 for Q2 2026. Open the filing ↗ · All SEC filings ↗

Reported 13F value: $1.1B
Reported positions: 140
Holdings vs S&P 500, 3 yrs: —
Assets under management: $16.4B

O'Connor Alternative Investments LLC is a hedge fund that reported 140 positions worth $1.1B in its Q2 2026 13F, filed 2026-08-14. Its largest holdings were Chart Inds Inc (GTLS, 52.3%), Topbuild Cor (BLD, 14.9%), Alphabet Inc (GOOG, 2.5%).

O'Connor Alternative Investments LLC holdings largest 50 of 140 positions.

Weights are shares of the filer's total reported 13F value, compared with Q1 2026. Share changes may reflect splits; weight changes also reflect price moves. A 13F shows long US-listed positions only, up to 135 days after the fact.

O'Connor Alternative Investments LLC 13F holdings
Stock	% of 13F value	Q1 2026	Shares	Share change	Reported value
GTLSChart Inds Inc	52.3%	—	2,865,147	—	$598.6M
BLDTopbuild Cor	14.9%	—	480,292	—	$170.3M
GOOGAlphabet Inc	2.5%	1.4%	80,020	+59.2%	$28.3M
SMCIPSuper Micro Computer Inc	2.5%	—	550,000	—	$28.2M
KLARKlarna Group PLC	2.0%	1.4%	1,127,170	+0.0%	$22.8M
GOOGNAlphabet Inc	2.0%	—	450,000	—	$22.6M
ZZillow Group Inc	0.9%	0.4%	330,595	+206.3%	$10.4M
68389X204Oracle Corp	0.8%	—	200,000	—	$9.0M
NWSANews Corp New	0.8%	—	348,019	—	$8.6M
JENAJena Acquisition Corp II	0.6%	0.7%	700,000	+0.0%	$7.3M
FOXFox Corporation	0.6%	0.7%	150,908	+9.5%	$7.1M
HEI-AHeico Corp New	0.5%	—	23,615	—	$6.1M
EGHAEgh Acquis	0.5%	0.5%	500,000	+0.0%	$5.2M
IRENIren Limited	0.4%	—	111,300	—	$5.1M
GHXIUGores Holdings Xi Inc	0.4%	—	500,000	—	$5.1M
OIMOneim Acqu	0.4%	0.5%	500,000	+0.0%	$5.0M
GTENGores Hldgs X Inc	0.4%	0.5%	474,796	-0.0%	$5.0M
RIVNRivian Automotive Inc	0.4%	—	279,000	—	$4.8M
CEPVCantor Equity Partners V Inc	0.4%	0.4%	450,000	+0.0%	$4.6M
AEISAdvanced Energy Inds	0.4%	—	11,850	—	$4.4M
LBTYKLiberty Global Ltd	0.4%	0.2%	401,616	+115.8%	$4.4M
ANSCAgriculture & Nat Sol Acq Co	0.4%	0.4%	384,160	+0.0%	$4.4M
BLZRTrailblazer Acquisition Corp	0.4%	0.4%	400,000	+0.0%	$4.0M
ICLNIshares Tr	0.3%	—	193,000	—	$4.0M
RBRKRubrik, Inc.	0.3%	—	43,600	—	$3.5M
NRGNrg Energy Inc	0.3%	—	22,000	—	$3.2M
OACCOaktree Acquisition Corp III	0.3%	0.3%	300,000	+0.0%	$3.2M
ACELAccel Entertainment Inc	0.3%	0.3%	246,728	+0.0%	$3.1M
NCLHNorwegian Cruise Line Hldg L	0.3%	0.3%	145,200	+0.0%	$3.1M
GCGRGeneral Ca	0.3%	—	300,000	—	$3.0M
UAAUnder Armour Inc	0.2%	0.2%	438,543	+9.6%	$2.8M
SVCCStellar V Cap Corp	0.2%	0.3%	250,000	+0.0%	$2.6M
CCAQCollective Acquisition Corp	0.2%	0.3%	250,000	+0.0%	$2.6M
NPACNew Providence Acquisition Cor	0.2%	0.3%	250,000	+0.0%	$2.6M
TVAIThayer Ventures Acq Corp II	0.2%	0.3%	250,000	+0.0%	$2.6M
BLUWBlue Wtr Acquisition Corp. I	0.2%	0.3%	250,000	+0.0%	$2.6M
TLNCTalon Cap Corp	0.2%	0.2%	250,000	+0.0%	$2.6M
SOCASolarius Capital Acqu Corp	0.2%	0.2%	250,000	+0.0%	$2.6M
OBAOxley Bridge Acq Ltd	0.2%	0.2%	250,000	+0.0%	$2.6M
XOPSpdr Series Trust	0.2%	—	16,570	—	$2.6M
ARKKArk Innovation ETF	0.2%	—	31,600	—	$2.6M
PACHPioneer Acquisition I Corp	0.2%	0.2%	250,000	+0.0%	$2.6M
HVMCHighview Merger Corp	0.2%	0.2%	250,000	+0.0%	$2.5M
KOYNCSLM Digital Asset Acquisition	0.2%	0.2%	250,000	+0.0%	$2.5M
MBVIM3-Brigade Acquisition Vi Co	0.2%	0.2%	250,000	+0.0%	$2.5M
ARKXArk ETF Tr	0.2%	—	73,600	—	$2.5M
EWJIshares Inc	0.2%	—	26,700	—	$2.5M
WLCOUWilco 63 Corp	0.2%	—	250,000	—	$2.5M
QADRQdro Acqui	0.2%	—	250,000	—	$2.5M
IHIIshares Tr	0.2%	—	50,000	—	$2.5M

What O'Connor Alternative Investments LLC bought and sold in Q2 2026, against Q1 2026.

New positions

Q1 2026's filing was too long to tell new positions apart.

Added to

Z Zillow Group Inc+206.3% shares
LBTYK Liberty Global Ltd+115.8% shares
GOOG Alphabet Inc+59.2% shares
UAA Under Armour Inc+9.6% shares
FOX Fox Corporation+9.5% shares

Reduced

No position shrank by more than 5%.

Left the top 50

HOLX Hologic Incwas 23.1%
AL Air Lease Corpwas 18.2%
FOLD Amicus Therapeuticwas 11.9%
SEE Sealed Air Corp Newwas 9.1%
OS Onestream Incwas 7.5%
DAWN Day One Biopharmaceuticals Incwas 3.9%
CUK Carnival PLCwas 2.5%
SMH Vaneck Semiconductor ETFwas 1.0%

Share counts compared with the Q1 2026 13F; a split also changes share counts. The latest filing lists more than 50 positions, so a position that left the top 50 may still be held.

How the holdings did against the S&P 500.

1 year: —
3 years: —
5 years: —

A portfolio of the filer's 20 largest 13F positions, weighted by value and rebuilt each quarter on the day the filing became public. 13Fs show long US-listed positions only, so this is an estimate of the stock picks, not the fund's reported returns.

Reported 13F value by quarter.

13F value by quarter
Quarter	13F value	Positions
Q2 2026	$1.1B	140
Q1 2026	$1.0B	115

Questions about O'Connor Alternative Investments LLC's portfolio

What stocks does O'Connor Alternative Investments LLC own?

O'Connor Alternative Investments LLC's latest 13F, for Q2 2026 and filed Aug 14, 2026, lists 140 positions worth $1.1B. The largest are Chart Inds Inc (GTLS) at 52.3%, Topbuild Cor (BLD) at 14.9%, Alphabet Inc (GOOG) at 2.5%, Super Micro Computer Inc (SMCIP) at 2.5% and Klarna Group PLC (KLAR) at 2.0%.

What did O'Connor Alternative Investments LLC buy last quarter?

In Q2 2026, O'Connor Alternative Investments LLC added Zillow Group Inc (Z) (+206.3% shares), Liberty Global Ltd (LBTYK) (+115.8% shares) and Alphabet Inc (GOOG) (+59.2% shares), compared with its Q1 2026 filing.

What did O'Connor Alternative Investments LLC sell last quarter?

In Q2 2026, O'Connor Alternative Investments LLC cut from its top 50 Hologic Inc (HOLX), cut from its top 50 Air Lease Corp (AL), cut from its top 50 Amicus Therapeutic (FOLD), cut from its top 50 Sealed Air Corp New (SEE) and cut from its top 50 Onestream Inc (OS), compared with its Q1 2026 filing.

When is O'Connor Alternative Investments LLC's next 13F filing due?

13F filings are due 45 days after each quarter ends. O'Connor Alternative Investments LLC's filing for the quarter ending Sep 30, 2026 is due by Nov 14, 2026; this page updates the day after it is published.

How much money does O'Connor Alternative Investments LLC manage?

O'Connor Alternative Investments LLC reported $16.4B of regulatory assets under management on its latest SEC Form ADV. Its 13F, which covers only US-listed stocks and options, totals $1.1B.