# EDGAR Filing Document

**Accession Number:** 0002081629
**File Stem:** 0002081629-26-000003
**Filing Date:** 2026-5
**Character Count:** 15315
**Document Hash:** 32dcaae4d3a507efbb6d1b1b538e4787
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0002081629-26-000003.hdr.sgml**: 20260515

**ACCESSION NUMBER**: 0002081629-26-000003

**CONFORMED SUBMISSION TYPE**: 13F-HR

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20260331

**FILED AS OF DATE**: 20260515

**DATE AS OF CHANGE**: 20260515

**EFFECTIVENESS DATE**: 20260515

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** O'Connor Alternative Investments LLC
- **CENTRAL INDEX KEY:** 0002081629

**ORGANIZATION NAME:**
- **EIN:** 133680189
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 13F-HR
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 028-26950
- **FILM NUMBER:** 26984078

**BUSINESS ADDRESS:**
- **STREET 1:** 110 E. 59TH ST.
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10022
- **BUSINESS PHONE:** 212-558-4568

**MAIL ADDRESS:**
- **STREET 1:** 110 E. 59TH ST.
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10022

### FORM 13F COVER PAGE

**Report for the Calendar Year or Quarter Ended:** 03-31-2026

**Check here if Amendment** [ ] **Amendment Number:** 

**This Amendment (Check only one.):** [ ] is a restatement.

[ ] adds new holdings entries.

**Institutional Investment Manager Filing this Report:**

**Name:** O'Connor Alternative Investments LLC<br>**Address:** 110 E. 59TH ST.<br>NEW YORK, NY 10022

**Form 13F File Number:** 028-26950

The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form.

**Person Signing this Report on Behalf of Reporting Manager:**

**Name:** Charles Mathys<br>**Title:** CCO<br>**Phone:** 312-469-7510

**Signature, Place, and Date of Signing:**

Charles Mathys  CHICAGO, IL  05-15-2026<br>[Signature]  [City, State]  [Date]

**Report Type (Check only one.):**

[x] **13F HOLDINGS REPORT.** (Check here if all holdings of this reporting manager are reported in this report.)

[ ] **13F NOTICE.** (Check here if no holdings are reported in this report, and all holdings are reported by other reporting manager(s).)

[ ] **13F COMBINATION REPORT.** (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other reporting manager(s).)

### Form 13F Summary Page

**Report Summary:**

**Number of Other Included Managers:** 0

**Form 13F Information Table Entry Total:** 128

**Form 13F Information Table Value Total:** $1167160563

      (round to nearest dollar)

**List of Other Included Managers:**

Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional investment managers with respect to which this report is filed, other than the manager filing this report.

[If there are no entries in this list, state “NONE” and omit the column headings and list entries.]

**NONE**

### FORM 13F INFORMATION TABLE

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| NAME OF ISSUER | TITLE OF CLASS | CUSIP | FIGI | VALUE (x$1000) | SHRS OR PRN AMT | SH/PRN | PUT/CALL | INVESTMENT DISCRETION | OTHER MANAGER | VOTING AUTHORITY | VOTING AUTHORITY | VOTING AUTHORITY |
| NAME OF ISSUER | TITLE OF CLASS | CUSIP | FIGI | VALUE (x$1000) | SHRS OR PRN AMT | SH/PRN | PUT/CALL | INVESTMENT DISCRETION | OTHER MANAGER | SOLE | SHARED | NONE |
| ACCEL ENTE | COMCL | 00436Q106 |  | 2691802 | 246728 | SH |  | DFND |  | 246728 | 0 | 0 |
| AIR LEASE | CLA | 00912X302 |  | 185733530 | 2860079 | SH |  | DFND |  | 2860079 | 0 | 0 |
| AKAMAI TEC | NOTE1 | 00971TAN1 |  | 17151000 | 15000000 | PRN |  | DFND |  | 15000000 | 0 | 0 |
| ALPHABET I | CAPST | 02079K107 |  | 14414715 | 50250 | SH |  | DFND |  | 50250 | 0 | 0 |
| NEW AMER A | UNIT9 | 023634207 |  | 1038000 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| ROYALTY MG | *WEXP | 02369M110 |  | 53936 | 221686 | SH |  | DFND |  | 221686 | 0 | 0 |
| AMERICAN A | COM | 02376R102 |  | 461328 | 2133300 | SH | Put | DFND |  | 2133300 | 0 | 0 |
| AMICUS THE | COM | 03152W109 |  | 122114584 | 8444992 | SH |  | DFND |  | 8444992 | 0 | 0 |
| ATRIUM THE | COM | 04965N104 |  | 7728007 | 578011 | SH |  | DFND |  | 578011 | 0 | 0 |
| BLOOM ENER | COM | 093712107 |  | 245250 | 15000 | SH | Call | DFND |  | 15000 | 0 | 0 |
| BOREALIS F | *WEXP | 09973D113 |  | 4671 | 70030 | SH |  | DFND |  | 70030 | 0 | 0 |
| CARNIVAL P | ADS | 14365C103 |  | 25322710 | 982643 | SH |  | DFND |  | 982643 | 0 | 0 |
| CID HOLDCO | *WEXP | 171756117 |  | 7490 | 282640 | SH |  | DFND |  | 282640 | 0 | 0 |
| CLEARWAY E | CLA | 18539C105 |  | 2937750 | 75000 | SH |  | DFND |  | 75000 | 0 | 0 |
| CLOUDFLARE | NOTE8 | 18915MAC1 |  | 25245300 | 21500000 | PRN |  | DFND |  | 21500000 | 0 | 0 |
| DAY ONE BI | COM | 23954D109 |  | 40040336 | 1867553 | SH |  | DFND |  | 1867553 | 0 | 0 |
| DUKE ENERG | NOTE4 | 26441CBY0 |  | 27665000 | 25000000 | PRN |  | DFND |  | 25000000 | 0 | 0 |
| FOX CORP | CLBCO | 35137L204 |  | 7316118 | 137780 | SH |  | DFND |  | 137780 | 0 | 0 |
| HOLOGIC IN | COM | 436440101 |  | 235703075 | 3118178 | SH |  | DFND |  | 3118178 | 0 | 0 |
| MULTISENSO | *WEXP | 456948116 |  | 5589 | 142585 | SH |  | DFND |  | 142585 | 0 | 0 |
| INVESCO QQ | COM | 46090E103 |  | 1560 | 26000 | SH | Put | DFND |  | 26000 | 0 | 0 |
| IRON HORSE | UNIT0 | 46283H202 |  | 996000 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| LIVE NATIO | NOTE3 | 538034BA6 |  | 22885500 | 15000000 | PRN |  | DFND |  | 15000000 | 0 | 0 |
| LUCID GROU | COM | 549498202 |  | 69618 | 12700 | SH | Put | DFND |  | 12700 | 0 | 0 |
| GEN DIGITA | RIGHT | 668771116 |  | 120248 | 250516 | SH |  | DFND |  | 250516 | 0 | 0 |
| ON SEMICON | NOTE0 | 682189AU9 |  | 19684000 | 20000000 | PRN |  | DFND |  | 20000000 | 0 | 0 |
| ONESTREAM | CLA | 68278B107 |  | 76483296 | 3186804 | SH |  | DFND |  | 3186804 | 0 | 0 |
| ORACLE COR | COM | 68389X105 |  | 2416282 | 16425 | SH |  | DFND |  | 16425 | 0 | 0 |
| PALO ALTO | COM | 697435105 |  | 25800 | 10000 | SH | Call | DFND |  | 10000 | 0 | 0 |
| STATE STR | COM | 78462F103 |  | 257325 | 115000 | SH | Put | DFND |  | 115000 | 0 | 0 |
| SEALED AIR | COM | 81211K100 |  | 93123173 | 2214582 | SH |  | DFND |  | 2214582 | 0 | 0 |
| SKILLSOFT | CLA | 83066P309 |  | 178859 | 41692 | SH |  | DFND |  | 41692 | 0 | 0 |
| SNOWFLAKE | COM | 833445109 |  | 122000 | 20000 | SH | Call | DFND |  | 20000 | 0 | 0 |
| SNOWFLAKE | NOTE1 | 833445AD1 |  | 30787500 | 25000000 | PRN |  | DFND |  | 25000000 | 0 | 0 |
| TEVOGEN BI | *WEXP | 88165K119 |  | 6149 | 181387 | SH |  | DFND |  | 181387 | 0 | 0 |
| UNDER ARMO | CLA | 904311107 |  | 2364000 | 400000 | SH |  | DFND |  | 400000 | 0 | 0 |
| VANECK ETF | SEMIC | 92189F676 |  | 10543500 | 27500 | SH |  | DFND |  | 27500 | 0 | 0 |
| WESTERN DI | COM | 958102105 |  | 3245880 | 12000 | SH |  | DFND |  | 12000 | 0 | 0 |
| ZILLOW GRO | CLCCA | 98954M200 |  | 4466143 | 107930 | SH |  | DFND |  | 107930 | 0 | 0 |
| AGRICULTUR | SHSCL | G0131Y100 |  | 4333325 | 384160 | SH |  | DFND |  | 384160 | 0 | 0 |
| ALDEL FINL | CLA | G01558108 |  | 1057000 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| AMERICAN E | ORDCL | G0273J101 |  | 541500 | 50000 | SH |  | DFND |  | 50000 | 0 | 0 |
| APEX TREAS | ORDSH | G04104108 |  | 999000 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| ARCHIMEDES | ORDSH | G04537109 |  | 2087000 | 200000 | SH |  | DFND |  | 200000 | 0 | 0 |
| ARTIUS II | SHSCL | G0509J115 |  | 1652800 | 160000 | SH |  | DFND |  | 160000 | 0 | 0 |
| BTC DEV CO | ORDSH | G0701G109 |  | 999000 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| AXIOM INTE | ORDSH | G0750N104 |  | 1772750 | 175000 | SH |  | DFND |  | 175000 | 0 | 0 |
| ARMADA ACQ | COMCL | G0R38G104 |  | 1546500 | 150000 | SH |  | DFND |  | 150000 | 0 | 0 |
| ARMADA ACQ | UNIT0 | G0R38G120 |  | 2997000 | 300000 | SH |  | DFND |  | 300000 | 0 | 0 |
| BAIN CAP G | ORDCL | G0R78B106 |  | 505600 | 50000 | SH |  | DFND |  | 50000 | 0 | 0 |
| AA MISSION | ORDSH | G1000S109 |  | 1507500 | 150000 | SH |  | DFND |  | 150000 | 0 | 0 |
| BERTO ACQU | ORDSH | G1051H101 |  | 1025000 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| BITCOIN IN | USDCL | G1143H101 |  | 990000 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| BLUE ACQUI | ORDSH | G1331A108 |  | 2042000 | 200000 | SH |  | DFND |  | 200000 | 0 | 0 |
| BLUE ACQUI | RIGHT | G1331A116 |  | 64740 | 200000 | SH |  | DFND |  | 200000 | 0 | 0 |
| BLUE WTR A | ORDSH | G1368E106 |  | 2572500 | 250000 | SH |  | DFND |  | 250000 | 0 | 0 |
| CAL REDWOO | COMCL | G17564108 |  | 2037000 | 200000 | SH |  | DFND |  | 200000 | 0 | 0 |
| CANTOR EQU | SHSCL | G1828A108 |  | 1031000 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| CANTOR EQU | SHSCL | G1828E100 |  | 1778868 | 174570 | SH |  | DFND |  | 174570 | 0 | 0 |
| CANTOR EQU | SHSCL | G1828S109 |  | 4545000 | 450000 | SH |  | DFND |  | 450000 | 0 | 0 |
| CARTESIAN | COMCL | G19307100 |  | 2562500 | 250000 | SH |  | DFND |  | 250000 | 0 | 0 |
| BOLD EAGLE | CLA | G2003N105 |  | 2314932 | 219217 | SH |  | DFND |  | 219217 | 0 | 0 |
| BOLD EAGLE | RIGHT | G2003N121 |  | 91920 | 400000 | SH |  | DFND |  | 400000 | 0 | 0 |
| CENTURION | SHSCL | G20315100 |  | 1616250 | 150000 | SH |  | DFND |  | 150000 | 0 | 0 |
| CHENGHE AC | ORDSH | G2086N105 |  | 1260625 | 125000 | SH |  | DFND |  | 125000 | 0 | 0 |
| COHEN CIRC | SHSCL | G2254C121 |  | 2044000 | 200000 | SH |  | DFND |  | 200000 | 0 | 0 |
| COPLEY ACQ | ORDSH | G24243100 |  | 1031500 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| CSLM DIGIT | USDCL | G2584S101 |  | 2510000 | 250000 | SH |  | DFND |  | 250000 | 0 | 0 |
| D. BORAL A | SHSCL | G2616F101 |  | 1265000 | 125000 | SH |  | DFND |  | 125000 | 0 | 0 |
| ANDRETTI A | ORDSH | G26745102 |  | 1598250 | 150000 | SH |  | DFND |  | 150000 | 0 | 0 |
| DUNE ACQUI | SHSCL | G2867S109 |  | 2582500 | 250000 | SH |  | DFND |  | 250000 | 0 | 0 |
| EGH ACQUIS | SHSCL | G2946P100 |  | 5105000 | 500000 | SH |  | DFND |  | 500000 | 0 | 0 |
| EQV VENTUR | ORDSH | G3106Q102 |  | 1513500 | 150000 | SH |  | DFND |  | 150000 | 0 | 0 |
| FIGX CAP A | USDCL | G3473K100 |  | 1013000 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| FORTRESS V | ORDSH | G3645T104 |  | 2004000 | 200000 | SH |  | DFND |  | 200000 | 0 | 0 |
| FUTURECRES | CLAOR | G3730U107 |  | 1509000 | 150000 | SH |  | DFND |  | 150000 | 0 | 0 |
| GESHER ACQ | USDCL | G3852D107 |  | 2072000 | 200000 | SH |  | DFND |  | 200000 | 0 | 0 |
| GALATA ACQ | ORDSH | G3R25N108 |  | 1248750 | 125000 | SH |  | DFND |  | 125000 | 0 | 0 |
| GORES HLDG | SHSCL | G4002F109 |  | 4853897 | 474941 | SH |  | DFND |  | 474941 | 0 | 0 |
| GP-ACT III | CLA | G4035N103 |  | 2710000 | 250000 | SH |  | DFND |  | 250000 | 0 | 0 |
| HIGHVIEW M | ORDSH | G4569C101 |  | 2512500 | 250000 | SH |  | DFND |  | 250000 | 0 | 0 |
| INFLECTION | CLAOR | G47875102 |  | 1021000 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| INDIGO ACQ | ORDSH | G4791J106 |  | 760500 | 75000 | SH |  | DFND |  | 75000 | 0 | 0 |
| INDIGO ACQ | RIGHT | G4791J114 |  | 10320 | 75000 | SH |  | DFND |  | 75000 | 0 | 0 |
| JACKSON AC | COMSH | G4992A110 |  | 1059000 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| JENA ACQUI | USDCL | G5093B105 |  | 7154000 | 700000 | SH |  | DFND |  | 700000 | 0 | 0 |
| KENSINGTON | UNIT9 | G5235S123 |  | 5020000 | 500000 | SH |  | DFND |  | 500000 | 0 | 0 |
| KLARNA GRO | SHS | G5279N105 |  | 14754655 | 1127170 | SH |  | DFND |  | 1127170 | 0 | 0 |
| LEGATO MER | ORDSH | G5451A103 |  | 1099000 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| LIVE OAK A | CLASH | G5509P102 |  | 3379199 | 324923 | SH |  | DFND |  | 324923 | 0 | 0 |
| MCKINLEY A | SHSCL | G6005T101 |  | 1006000 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| MCKINLEY A | RIGHT | G6005T119 |  | 11010 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| LIBERTY GL | COMCL | G61188127 |  | 2182953 | 186100 | SH |  | DFND |  | 186100 | 0 | 0 |
| MOUNTAIN L | SHSCL | G6301B101 |  | 1578573 | 149912 | SH |  | DFND |  | 149912 | 0 | 0 |
| M3-BRIGADE | ORDSH | G63221108 |  | 2513750 | 250000 | SH |  | DFND |  | 250000 | 0 | 0 |
| NEW PROVID | USDCL | G6476A102 |  | 2565000 | 250000 | SH |  | DFND |  | 250000 | 0 | 0 |
| NEWHOLD IN | ORDSH | G6486E102 |  | 3372636 | 324604 | SH |  | DFND |  | 324604 | 0 | 0 |
| NORWEGIAN | SHS | G66721104 |  | 2715240 | 145200 | SH |  | DFND |  | 145200 | 0 | 0 |
| OAKTREE AC | SHSCL | G6717R104 |  | 3174000 | 300000 | SH |  | DFND |  | 300000 | 0 | 0 |
| 1RT ACQUIS | USDCL | G6757R105 |  | 1014000 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| OTG ACQUIS | ORDCL | G6791A100 |  | 1760500 | 175000 | SH |  | DFND |  | 175000 | 0 | 0 |
| OXLEY BRID | USDCL | G6858G107 |  | 2532500 | 250000 | SH |  | DFND |  | 250000 | 0 | 0 |
| OYSTER ENT | ORDSH | G6861F104 |  | 1022000 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| ONEIM ACQU | ORDSH | G6S74K106 |  | 4980000 | 500000 | SH |  | DFND |  | 500000 | 0 | 0 |
| PIONEER AC | CLAOR | G7117W107 |  | 2540000 | 250000 | SH |  | DFND |  | 250000 | 0 | 0 |
| PYROPHYTE | CLASH | G7309T102 |  | 1517250 | 150000 | SH |  | DFND |  | 150000 | 0 | 0 |
| QDRO ACQUI | UNIT0 | G7310E128 |  | 2480000 | 250000 | SH |  | DFND |  | 250000 | 0 | 0 |
| RANGE CAP | CLAOR | G7375J103 |  | 2250000 | 225000 | SH |  | DFND |  | 225000 | 0 | 0 |
| REAL ASSET | SHSCL | G73944103 |  | 524500 | 50000 | SH |  | DFND |  | 50000 | 0 | 0 |
| RITHM ACQU | CLA | G75751100 |  | 1040000 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| ROMAN DBDR | ORDSH | G7633M104 |  | 1047000 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| SCAGE FUTU | *WEXP | G7840J118 |  | 6533 | 127590 | SH |  | DFND |  | 127590 | 0 | 0 |
| SILVER PEG | SHSCL | G8192J102 |  | 1220400 | 120000 | SH |  | DFND |  | 120000 | 0 | 0 |
| SIZZLE ACQ | USDCL | G8193F109 |  | 1026000 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| SOLARIUS C | SHSCL | G82617104 |  | 2545000 | 250000 | SH |  | DFND |  | 250000 | 0 | 0 |
| SOULPOWER | USDCL | G82745103 |  | 1537500 | 150000 | SH |  | DFND |  | 150000 | 0 | 0 |
| SPARTACUS | UNIT0 | G8303R126 |  | 1003500 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| SPARK I AC | ORDSH | G8316B100 |  | 755870 | 66832 | SH |  | DFND |  | 66832 | 0 | 0 |
| SPRING VY | SHSCL | G8377R101 |  | 1016000 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| STELLAR V | SHSCL | G8475V103 |  | 2617500 | 250000 | SH |  | DFND |  | 250000 | 0 | 0 |
| TALON CAP | ORDSH | G86652107 |  | 2550000 | 250000 | SH |  | DFND |  | 250000 | 0 | 0 |
| THAYER VEN | CLA | G87890102 |  | 2557500 | 250000 | SH |  | DFND |  | 250000 | 0 | 0 |
| TRAILBLAZE | ORDSH | G9009S103 |  | 4020000 | 400000 | SH |  | DFND |  | 400000 | 0 | 0 |
| TRAILBLAZE | *WEXP | G9009S111 |  | 50693 | 133333 | SH |  | DFND |  | 133333 | 0 | 0 |
| TRG LATIN | UNIT0 | G9037S125 |  | 3482500 | 350000 | SH |  | DFND |  | 350000 | 0 | 0 |
| VIKING ACQ | ORDCL | G9582G104 |  | 1497750 | 150000 | SH |  | DFND |  | 150000 | 0 | 0 |
| WILLOW LAN | UNIT0 | G9675K129 |  | 1010000 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |
| WEN ACQUIS | COMCL | G9R39C103 |  | 1018000 | 100000 | SH |  | DFND |  | 100000 | 0 | 0 |

---