O'Connor Alternative Investments LLC
Long book
$1.02B
Q1 2026
Positions
115
Top-10 weight
80%
concentration
Last quarter
-8.3%
SPY +14.8%
Turnover
—
of book per quarter
Strategy in plain words
auto-generated from filingsO'Connor Alternative Investments LLC is a diversified fundamental manager, running a $1.02B US long book across 115 positions.
The portfolio is extremely concentrated — the top 10 positions are almost the whole book. Current anchor positions: HOLOGIC INC, AIR LEASE CORP, AMICUS THERAPEUTICS INC, SEALED AIR CORP, ONESTREAM INC.
We rate its filings as signal-bearing: position changes reflect genuine views.
Sector allocation
Other 69%
Financials 15%
Services media 10%
Technology 2%
Communications 1%
Healthcare 1%
Consumer discretionary 0%
Industrials 0%
Long book by quarter
What does O'Connor Alternative own?
Q1 2026 13F| Company | Sector | Shares | Value | % of book | Change |
|---|---|---|---|---|---|
| HO1 HOLOGIC INC | — | 3.1M | $235.7M | 23.1% | Held |
| AL AIR LEASE CORP | — | 2.9M | $185.7M | 18.2% | Held |
| AM6 AMICUS THERAPEUTICS INC | — | 8.4M | $122.1M | 11.9% | Held |
| SDA SEALED AIR CORP | Services media | 2.2M | $93.1M | 9.1% | Held |
| K4F ONESTREAM INC | — | 3.2M | $76.5M | 7.5% | Held |
| DAWNGBX DAY ONE BIOPHARMACEUTICALS I | — | 1.9M | $40.0M | 3.9% | Held |
| KLAR KLARNA GROUP PLC | Financials | 1.1M | $14.8M | 1.4% | Held |
| GOOG ALPHABET INC-CL C | Technology | 50.3K | $14.4M | 1.4% | Held |
| RNA ATRIUM THERAPEUTICS INC | Healthcare | 578.0K | $7.7M | 0.8% | Held |
| FOX FOX CORP - CLASS B | Communications | 137.8K | $7.3M | 0.7% | Held |
| JENA JENA ACQUISITION CORP II - A | Financials | 700.0K | $7.2M | 0.7% | Held |
| EGHA EGH ACQUISITION CO-A | Financials | 500.0K | $5.1M | 0.5% | Held |
| OIM ONEIM ACQUISITION CL-A | Financials | 500.0K | $5.0M | 0.5% | Held |
| GTEN GORES HOLDINGS X INC-CL A | Financials | 474.9K | $4.9M | 0.5% | Held |
| CEPV CANTOR EQUITY PARTNERS-CL A | Financials | 450.0K | $4.5M | 0.4% | Held |
| Z ZILLOW GROUP INC - C | Services media | 107.9K | $4.5M | 0.4% | Held |
| ANSC AGRICULTURE & NATURAL SOLUTI | Financials | 384.2K | $4.3M | 0.4% | Held |
| BLZR TRAILBLAZER ACQUISITION-CL A | Financials | 400.0K | $4.0M | 0.4% | Held |
| TMS TEAMSHARES INC | Consumer discretionary | 324.9K | $3.4M | 0.3% | Held |
| NHIC NEWHOLD INVESTMENT COR III-A | Financials | 324.6K | $3.4M | 0.3% | Held |
| WDC WESTERN DIGITAL CORP | Technology | 12.0K | $3.2M | 0.3% | Held |
| OACC OAKTREE ACQUISITION CORP I-A | Financials | 300.0K | $3.2M | 0.3% | Held |
| NY4B CLEARWAY ENERGY INC-A | — | 75.0K | $2.9M | 0.3% | Held |
| NCLH NORWEGIAN CRUISE LINE HOLDIN | Industrials | 145.2K | $2.7M | 0.3% | Held |
| GPAT GP-ACT III ACQUISITION-A | Financials | 250.0K | $2.7M | 0.3% | Held |
| ACEL ACCEL ENTERTAINMENT INC | Services media | 246.7K | $2.7M | 0.3% | Held |
| SVCC STELLAR V CAPITAL CORP-CL A | Financials | 250.0K | $2.6M | 0.3% | Held |
| CCAQ COLLECTIVE ACQUISITION CORP | Financials | 250.0K | $2.6M | 0.3% | Held |
| BLUW BLUE WATER ACQUISITION C-A | Financials | 250.0K | $2.6M | 0.3% | Held |
| NPAC NEW PROVIDENCE ACQUISITION-A | Financials | 250.0K | $2.6M | 0.3% | Held |
| FAC FACTORIAL ENERGY INC | Technology | 250.0K | $2.6M | 0.3% | Held |
| TVAI THAYER VENTURES ACQUIS CL A | Financials | 250.0K | $2.6M | 0.3% | Held |
| TLNC TALON CAPITAL CORP-CL A | Financials | 250.0K | $2.5M | 0.2% | Held |
| SOCA SOLARIUS CAPITAL ACQUIS-CL A | Financials | 250.0K | $2.5M | 0.2% | Held |
| PACH PIONEER ACQUISITION I-CL A | Financials | 250.0K | $2.5M | 0.2% | Held |
| OBA OXLEY BRIDGE ACQUISITIO-CL A | Financials | 250.0K | $2.5M | 0.2% | Held |
| MBVI M3-BRIGADE ACQUISITION-CL A | Financials | 250.0K | $2.5M | 0.2% | Held |
| HVMC HIGHVIEW MERGER CORP-CL A | Financials | 250.0K | $2.5M | 0.2% | Held |
| KOYN CSLM DIGITAL ASSET ACQU - A | Financials | 250.0K | $2.5M | 0.2% | Held |
| ORCL ORACLE CORP | Technology | 16.4K | $2.4M | 0.2% | Held |
| UAA UNDER ARMOUR INC-CLASS A | Other | 400.0K | $2.4M | 0.2% | Held |
| BEAG BOLD EAGLE ACQUISITION COR-A | Financials | 219.2K | $2.3M | 0.2% | Held |
| RNGT RANGE CAPITAL ACQUISIT CL A | Financials | 225.0K | $2.3M | 0.2% | Held |
| LBTYK LIBERTY GLOBAL LTD-C | Communications | 186.1K | $2.2M | 0.2% | Held |
| ATII ARCHIMEDES TECH SPAC PARTNER | Financials | 200.0K | $2.1M | 0.2% | Held |
| GSHR GESHER ACQUISITION CORP II-A | Financials | 200.0K | $2.1M | 0.2% | Held |
| CCII COHEN CIRCLE ACQUISIT II - A | Financials | 200.0K | $2.0M | 0.2% | Held |
| BACC BLUE ACQUISITION CORP-CL A | Financials | 200.0K | $2.0M | 0.2% | Held |
| CRAQ CAL REDWOOD ACQUISIT-CL A | Financials | 200.0K | $2.0M | 0.2% | Held |
| FVAV FORTRESS VALUE ACQUIS V-CL A | Financials | 200.0K | $2.0M | 0.2% | Held |
13F filing history
| Period | Form | Filed | Entries | Reported value | Flags | Source |
|---|---|---|---|---|---|---|
| Q1 2026 | 13F-HR | May 15, 2026 | 128 | $1.17B | confidential canonical | SEC ↗ |
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