UBS OCONNOR LLC
Sector Allocation
- Financials17.3%$146.8M
- Technology15.7%$132.8M
- Other14.4%$122.2M
- Healthcare13.0%$110.5M
- Utilities12.6%$106.5M
- Consumer Discretionary10.2%$86.4M
- Industrials8.9%$75.7M
- Materials4.0%$33.8M
- Communication Services3.6%$30.7M
- Consumer Staples0.3%$2.3M
AUM History
13fpro.ai/research/fund/ubs-oconnor-llc-1132716
Conviction and streaks
Concentrating · top 10 = 40.4%From the fund's last 12 quarters of 13F filings: positions held longest at size, and names it added to or trimmed several quarters running.
Largest positions — Q4 2025
EXAS
$93.7M- CIDARA$69.7M
- SYNOVUS$35.0M
AVGO
$27.3MPTON
$27.1MMAT
$19.3MSNOW
$19.0MDKNG
$18.3MNVDA
$18.1MAEP
$15.0MCNP
$14.6MLNT
$14.6MFOLD
$14.2MCRH
$13.7MPH
$13.6MWM
$13.6M- ISHARES$12.8M
BA
$11.2MCROX
$10.6MFE
$10.2M
Top 20 stock positions. Options are left out: 13F reports them at the underlying's value.
13fpro.ai/research/fund/ubs-oconnor-llc-1132716
UBS OCONNOR LLC 13F holdings — Q4 2025
$880.7M portfolio (-6.0% QoQ) · 221 holdings · Q4 2025 13F · top 10 are 40% of the stock portfolio
Includes $33.1M of put/call options ($31.7M puts, $1.4M calls), which 13F rules report at the value of the underlying shares, not the premium at risk. Stocks alone: $847.6M. Weights use the stock portfolio.
$93.7M
11.1% of stocks
NewThis quarter—Since filedNew this quarterHeld- 2
CIDARA THE
$69.7M
8.2% of stocks
NewThis quarter—Since filedNew this quarterHeldAIQuality—Est. buy— - 3
SYNOVUS FI
$35.0M
4.1% of stocks
NewThis quarter—Since filedNew this quarterHeldAIQuality—Est. buy— $27.3M
3.2% of stocks
+1278%This quarter+5.3%Since filed8+ qtrsHeld$27.1M
3.2% of stocks
+23%This quarter+24.7%Since filed8+ qtrsHeld$19.3M
2.3% of stocks
+5%This quarter-6.3%Since filed8+ qtrsHeldAIQuality55.1#1,275Est. buyEstimated buy price is Pro: unlock with a free trialAdded 2 qtrs in a row$19.0M
2.2% of stocks
+392%This quarter+85.1%Since filed2 qtrsHeld$18.3M
2.2% of stocks
-8%This quarter-4.5%Since filed8+ qtrsHeld$18.1M
2.1% of stocks
-43%This quarter+19.2%Since filed8+ qtrsHeldAIQualityAI quality score is Pro: unlock with a free trialEst. buyEstimated buy price is Pro: unlock with a free trialTrimmed 2 qtrs in a row$15.0M
1.8% of stocks
+210%This quarter+0.3%Since filed2 qtrsHeldAIQualityAI quality score is Pro: unlock with a free trialEst. buyEstimated buy price is Pro: unlock with a free trialAdded 2 qtrs in a row
All holdings — UBS OCONNOR LLC (Q4 2025)
221 disclosed positions from the Form 13F-HR on SEC EDGAR, with quarter-over-quarter share changes. Largest by value first; the ten above are not repeated.
| # | Company | Held | Source | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 11 | CENTERPOINT ENERGY INC | Utilities | $14.6M | 1.7% | 381K | -2% | 3 qtrsTrimmed 2 qtrs in a row | AI quality score is Pro: unlock with a free trial | 13F | |
| 12 | ALLIANT ENERGY CORP | Utilities | $14.6M | 1.7% | 224K | -26% | 2 qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 13 | AMICUS THERAPEUTICS, INC. | Healthcare | $14.2M | 1.7% | 1.00M | New | 1 qtr | AI quality score is Pro: unlock with a free trial | 13F | |
| 14 | CRH PUBLIC LTD CO | Materials | $13.7M | 1.6% | 110K | New | 1 qtr | AI quality score is Pro: unlock with a free trial | 13F | |
| 15 | Parker-Hannifin Corp | Industrials | $13.6M | 1.6% | 15K | New | 1 qtr | AI quality score is Pro: unlock with a free trial | 13F | |
| 16 | WASTE MANAGEMENT INC | Utilities | $13.6M | 1.6% | 62K | New | 1 qtr | AI quality score is Pro: unlock with a free trial | 13F | |
| 17 | — | ISHARES TRetf/fund | — | $12.8M | 1.5% | 52K | New | — | — | 13F |
| 18 | BOEING CO | Industrials | $11.2M | 1.3% | 52K | New | 1 qtr | AI quality score is Pro: unlock with a free trial | 13F | |
| 19 | — PUT | ISHARES TR | — | $10.8M | — | 45K | New | — | — | 13F |
| 20 | Crocs, Inc. | Consumer Discretionary | $10.6M | 1.3% | 124K | — | 3 qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 21 | FIRSTENERGY CORP | Utilities | $10.2M | 1.2% | 10.00M | — | 3 qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 22 | Talen Energy Corp | Utilities | $9.8M | 1.2% | 26K | New | 1 qtr | AI quality score is Pro: unlock with a free trial | 13F | |
| 23 | NEXTERA ENERGY INC | Utilities | $8.8M | 1.0% | 109K | New | 1 qtr | AI quality score is Pro: unlock with a free trial | 13F | |
| 24 | B2GOLD CORP | Materials | $8.3M | 1.0% | 1.84M | +2% | 5 qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 25 | Palo Alto Networks Inc | Technology | $8.3M | 1.0% | 45K | New | 1 qtr | AI quality score is Pro: unlock with a free trial | 13F | |
| 26 | $SO | SOUTHERN CO | Utilities | $8.0M | 0.9% | 7.50M | -57% | |||
| 27 | $GOOGL | Alphabet Inc. | Technology | $7.8M | 0.9% | 25K | New | |||
| 28 | $JENA | JENA ACQUISITION Corp II | Financials | $7.1M | 0.8% | 700K | New | |||
| 29 | $TOST | Toast, Inc. | Technology | $7.1M | 0.8% | 200K | +150% | |||
| 30 | $KNX | Knight-Swift Transportation Holdings Inc. | Industrials | $7.0M | 0.8% | 134K | New | |||
| 31 | $TSLA | Tesla, Inc. | Consumer Discretionary | $6.1M | 0.7% | 14K | +15% | |||
| 32 | $TEL | TE Connectivity plc | Technology | $6.0M | 0.7% | 26K | New | |||
| 33 | $FUTU | Futu Holdings Ltd | Financials | $5.9M | 0.7% | 36K | New | |||
| 34 | $NCLH PUT | Norwegian Cruise Line Holdings Ltd. | Industrials | $5.7M | — | 189K | +36% | |||
| 35 | $UAL | United Airlines Holdings, Inc. | Industrials | $5.6M | 0.7% | 50K | New | |||
| 36 | $SAIA | SAIA INC | Industrials | $5.2M | 0.6% | 16K | New | |||
| 37 | $EGHA | EGH Acquisition Corp. | Financials | $5.1M | 0.6% | 500K | New | |||
| 38 | $MELI | MERCADOLIBRE INC | Consumer Discretionary | $5.0M | 0.6% | 2,500 | -62% | |||
| 39 | $FLS | FLOWSERVE CORP | Industrials | $5.0M | 0.6% | 72K | New | |||
| 40 | $HON | HONEYWELL INTERNATIONAL INC | Industrials | $5.0M | 0.6% | 26K | New | |||
| 41 | $LYV | Live Nation Entertainment, Inc. | Communication Services | $4.9M | 0.6% | 34K | -49% | |||
| 42 | $GTEN | Gores Holdings X, Inc. / CI | Financials | $4.9M | 0.6% | 475K | New | |||
| 43 | $CEPV | Cantor Equity Partners V, Inc. | Financials | $4.6M | 0.5% | 450K | New | |||
| 44 | $AXTA | Axalta Coating Systems Ltd. | Materials | $4.5M | 0.5% | 141K | +65% | |||
| 45 | $ETR | ENTERGY CORP /DE/ | Utilities | $4.5M | 0.5% | 49K | -77% | |||
| 46 | $URI | UNITED RENTALS, INC. | Industrials | $4.4M | 0.5% | 5,400 | -38% | |||
| 47 | $ANSC | Agriculture & Natural Solutions Acquisition Corp | Financials | $4.3M | 0.5% | 384K | New | |||
| 48 | $BKNG | Booking Holdings Inc. | Consumer Discretionary | $4.3M | 0.5% | 800 | New | |||
| 49 | $CEG | Constellation Energy Corp | Utilities | $4.3M | 0.5% | 12K | New | |||
| 50 | $LCID PUT | Lucid Group, Inc. | Consumer Discretionary | $4.1M | — | 2.78M | +6% | |||
| 51 | $HWM | Howmet Aerospace Inc. | Materials | $4.1M | 0.5% | 20K | -20% | |||
| 52 | $DAL | DELTA AIR LINES, INC. | Industrials | $4.1M | 0.5% | 59K | -49% | |||
| 53 | $BLZR | Trailblazer Acquisition Corp. | Financials | $4.0M | 0.5% | 400K | New | |||
| 54 | $SNPS | SYNOPSYS INC | Technology | $3.8M | 0.4% | 8,000 | -57% | |||
| 55 | $COHR | COHERENT CORP. | Technology | $3.7M | 0.4% | 20K | +51% | |||
| 56 | $INTC | INTEL CORP | Technology | $3.7M | 0.4% | 100K | -22% | |||
| 57 | $VSAT PUT | VIASAT INC | Communication Services | $3.7M | — | 73K | +25% | |||
| 58 | $VRT | Vertiv Holdings Co | Technology | $3.6M | 0.4% | 22K | +3% | |||
| 59 | $PDD | PDD Holdings Inc. | Consumer Discretionary | $3.5M | 0.4% | 31K | -21% | |||
| 60 | $NHIC | NewHold Investment Corp. III | Financials | $3.4M | 0.4% | 325K | New | |||
| 61 | $TMS | Teamshares Inc | Consumer Discretionary | $3.3M | 0.4% | 325K | New | |||
| 62 | $OACC | Oaktree Acquisition Corp. III Life Sciences | Financials | $3.2M | 0.4% | 300K | New | |||
| 63 | $TKO | TKO Group Holdings, Inc. | Communication Services | $3.1M | 0.4% | 15K | +150% | |||
| 64 | $GFUZ | General Fusion Group Ltd. | Utilities | $3.0M | 0.4% | 300K | New | |||
| 65 | $NCLH | Norwegian Cruise Line Holdings Ltd. | Industrials | $3.0M | 0.4% | 135K | — | |||
| 66 | $APH | AMPHENOL CORP /DE/ | Technology | $3.0M | 0.3% | 22K | -56% | |||
| 67 | $FSLR | FIRST SOLAR, INC. | Technology | $3.0M | 0.3% | 11K | New | |||
| 68 | $CHRW | C. H. ROBINSON WORLDWIDE, INC. | Industrials | $2.9M | 0.3% | 18K | -75% | |||
| 69 | $ACEL | Accel Entertainment, Inc. | Communication Services | $2.8M | 0.3% | 247K | New | |||
| 70 | $GPAT | GP-Act III Acquisition Corp. | Financials | $2.7M | 0.3% | 250K | New | |||
| 71 | $YCY | AA Mission Acquisition Corp. II | Financials | $2.7M | 0.3% | 250K | New | |||
| 72 | — | STELLAR V | — | $2.6M | 0.3% | 250K | New | |||
| 73 | $BLUW | Blue Water Acquisition Corp. III | Financials | $2.6M | 0.3% | 250K | New | |||
| 74 | $FAC | Factorial Energy Inc. | Technology | $2.6M | 0.3% | 250K | New | |||
| 75 | $NPAC | New Providence Acquisition Corp. III/Cayman | Financials | $2.6M | 0.3% | 250K | New | |||
| 76 | $PFE | PFIZER INC | Healthcare | $2.6M | 0.3% | 103K | New | |||
| 77 | $CCAQ | COLLECTIVE ACQUISITION CORP. | Financials | $2.5M | 0.3% | 250K | New | |||
| 78 | $FTW-WT | EQV Ventures Acquisition Corp. | Financials | $2.5M | 0.3% | 242K | New | |||
| 79 | $TVAI | Thayer Ventures Acquisition Corp II | Financials | $2.5M | 0.3% | 250K | New | |||
| 80 | $TLNC | Talon Capital Corp. | Financials | $2.5M | 0.3% | 250K | New | |||
| 81 | $OBA | Oxley Bridge Acquisition Ltd | Financials | $2.5M | 0.3% | 250K | New | |||
| 82 | $PACH | Pioneer Acquisition I Corp | Financials | $2.5M | 0.3% | 250K | New | |||
| 83 | $SOCA | Solarius Capital Acquisition Corp. | Financials | $2.5M | 0.3% | 250K | New | |||
| 84 | $GEV | GE Vernova Inc. | Industrials | $2.5M | 0.3% | 3,834 | New | |||
| 85 | $MBVI | M3-Brigade Acquisition VI Corp. | Financials | $2.5M | 0.3% | 250K | New | |||
| 86 | $HVMC | Highview Merger Corp. | Financials | $2.5M | 0.3% | 250K | New | |||
| 87 | $KOYN | CSLM Digital Asset Acquisition Corp III, Ltd | Financials | $2.5M | 0.3% | 250K | New | |||
| 88 | $BEAG | Bold Eagle Acquisition Corp. | Financials | $2.3M | 0.3% | 219K | New | |||
| 89 | $TJX | TJX COMPANIES INC /DE/ | Consumer Discretionary | $2.3M | 0.3% | 15K | New | |||
| 90 | $RNGT | Range Capital Acquisition Corp II | Financials | $2.2M | 0.3% | 225K | New | |||
| 91 | $ASML | ASML HOLDING NV | Technology | $2.1M | 0.3% | 2,000 | New | |||
| 92 | $WAB | WESTINGHOUSE AIR BRAKE TECHNOLOGIES CORP | Industrials | $2.1M | 0.3% | 10K | New | |||
| 93 | $CCIX | Churchill Capital Corp IX/Cayman | Technology | $2.1M | 0.3% | 199K | New | |||
| 94 | $ATII | Archimedes Tech SPAC Partners II Co. | Financials | $2.1M | 0.2% | 200K | New | |||
| 95 | $GSHR | Gesher Acquisition Corp. II | Financials | $2.0M | 0.2% | 200K | New | |||
| 96 | $CCII | Cohen Circle Acquisition Corp. II | Financials | $2.0M | 0.2% | 200K | New | |||
| 97 | — | BLUE ACQUI | — | $2.0M | 0.2% | 200K | New | |||
| 98 | $CRAQ | Cal Redwood Acquisition Corp. | Financials | $2.0M | 0.2% | 200K | New | |||
| 99 | $BCARU | D. Boral ARC Acquisition I Corp. | Financials | $2.0M | 0.2% | 200K | New | |||
| 100 | $MPT PUT | MEDICAL PROPERTIES TRUST INC | Real Estate | $2.0M | — | 397K | +25% | |||
| 101 | $CHKP | CHECK POINT SOFTWARE TECHNOLOGIES LTD | Technology | $1.9M | 0.2% | 10K | New | |||
| 102 | $BURL | Burlington Stores, Inc. | Consumer Discretionary | $1.9M | 0.2% | 6,500 | New | |||
| 103 | $CEPF | Cantor Equity Partners IV, Inc. | Financials | $1.8M | 0.2% | 175K | New | |||
| 104 | $AXIN | Axiom Intelligence Acquisition Corp 1 | Financials | $1.8M | 0.2% | 175K | New | |||
| 105 | $OTGA | OTG Acquisition Corp. I | Financials | $1.8M | 0.2% | 175K | New | |||
| 106 | $AACB | Artius II Acquisition Inc. | Financials | $1.6M | 0.2% | 160K | New | |||
| 107 | $ALF | Centurion Acquisition Corp. | Financials | $1.6M | 0.2% | 150K | New | |||
| 108 | $POLE | Andretti Acquisition Corp. II | Financials | $1.6M | 0.2% | 150K | New | |||
| 109 | $MLAC | Mountain Lake Acquisition Corp. | Financials | $1.6M | 0.2% | 150K | New | |||
| 110 | $XRPNU | Armada Acquisition Corp. II | Financials | $1.5M | 0.2% | 150K | New | |||
| 111 | $CMI | CUMMINS INC | Industrials | $1.5M | 0.2% | 3,000 | New | |||
| 112 | $SOUL | Soulpower Acquisition Corp. | Financials | $1.5M | 0.2% | 150K | New | |||
| 113 | $FCRS | FutureCrest Acquisition Corp. | Financials | $1.5M | 0.2% | 150K | New | |||
| 114 | $PAII | Pyrophyte Acquisition Corp. II | Financials | $1.5M | 0.2% | 150K | New | |||
| 115 | $EVAC | EQV Ventures Acquisition Corp. II | Financials | $1.5M | 0.2% | 150K | New | |||
| 116 | $TSEM | TOWER SEMICONDUCTOR LTD | Technology | $1.5M | 0.2% | 13K | -61% | |||
| 117 | $YCY | AA Mission Acquisition Corp. II | Financials | $1.5M | 0.2% | 150K | New | |||
| 118 | $NSTR | NorthStar Earth & Space Enterprises, Inc. | Financials | $1.5M | 0.2% | 150K | New | |||
| 119 | $WBD | Warner Bros. Discovery, Inc. | Communication Services | $1.4M | 0.2% | 50K | — | |||
| 120 | $ALCY | Alchemy Investments Acquisition Corp 1 | Financials | $1.4M | 0.2% | 100K | New | |||
| 121 | $ACMR | ACM Research, Inc. | Technology | $1.4M | 0.2% | 36K | -46% | |||
| 122 | $TPR | TAPESTRY, INC. | Consumer Discretionary | $1.3M | 0.1% | 10K | New | |||
| 123 | $CHEC | Chenghe Acquisition III Co. | Financials | $1.2M | 0.1% | 125K | New | |||
| 124 | $LATA | Galata Acquisition Corp. II | Financials | $1.2M | 0.1% | 125K | New | |||
| 125 | $GEN | Gen Digital Inc. | Technology | $1.2M | 0.1% | 275K | +256% | |||
| 126 | $DLTR | DOLLAR TREE, INC. | Consumer Staples | $1.2M | 0.1% | 10K | New | |||
| 127 | $SPEG | Silver Pegasus Acquisition Corp. | Financials | $1.2M | 0.1% | 120K | New | |||
| 128 | $CSIQ | Canadian Solar Inc. | Technology | $1.1M | 0.1% | 48K | New | |||
| 129 | $LITE | Lumentum Holdings Inc. | Technology | $1.1M | 0.1% | 3,083 | New | |||
| 130 | $HYAC-WT | Haymaker Acquisition Corp. 4 | Financials | $1.1M | 0.1% | 100K | New | |||
| 131 | $SN | SharkNinja, Inc. | Technology | $1.1M | 0.1% | 10K | +14% | |||
| 132 | $WMT | Walmart Inc. | Consumer Staples | $1.1M | 0.1% | 10K | New | |||
| 133 | $LEGT | Legato Merger Corp. III | Financials | $1.1M | 0.1% | 100K | New | |||
| 134 | $ALDF | Aldel Financial II Inc. | Financials | $1.1M | 0.1% | 100K | New | |||
| 135 | $DRDB | Roman DBDR Acquisition Corp. II | Financials | $1.0M | 0.1% | 100K | New | |||
| 136 | $JACS | Jackson Acquisition Co II | Financials | $1.0M | 0.1% | 100K | New | |||
| 137 | $RAC | Rithm Acquisition Corp. | Financials | $1.0M | 0.1% | 100K | New | |||
| 138 | $COPL | Copley Acquisition Corp | Financials | $1.0M | 0.1% | 100K | New | |||
| 139 | $ONCH | 1RT Acquisition Corp. | Financials | $1.0M | 0.1% | 100K | New | |||
| 140 | $CAEP | Cantor Equity Partners III, Inc. | Financials | $1.0M | 0.1% | 100K | New | |||
| 141 | $PELIU | Pelican Acquisition Corp | Financials | $1.0M | 0.1% | 100K | New | |||
| 142 | $SZZL | Sizzle Acquisition Corp. II | Financials | $1.0M | 0.1% | 100K | New | |||
| 143 | $IPCX | Inflection Point Acquisition Corp. III | Financials | $1.0M | 0.1% | 100K | New | |||
| 144 | $TACO | Berto Acquisition Corp. | Financials | $1.0M | 0.1% | 100K | New | |||
| 145 | $OYSE | Oyster Enterprises II Acquisition Corp | Financials | $1.0M | 0.1% | 100K | New | |||
| 146 | $WENN | WEN Acquisition Corp | Financials | $1.0M | 0.1% | 100K | New | |||
| 147 | $FIGX | FIGX Capital Acquisition Corp. | Financials | $1.0M | 0.1% | 100K | New | |||
| 148 | $BDCI | BTC Development Corp. | Financials | $1.0M | 0.1% | 100K | New | |||
| 149 | $MKLY | McKinley Acquisition Corp | Financials | $997K | 0.1% | 100K | New | |||
| 150 | $IRHO | Iron Horse Acquisition II Corp. | Financials | $994K | 0.1% | 100K | New |
What changed in Q4 2025
Against the previous quarter's 13F: 139 new, 49 added to, 27 trimmed, 93 sold out. Share-count changes; largest moves by dollar size first.
New positions (139)
first bought this quarter
- CIDARA THE$69.7M
first bought this quarter
- SYNOVUS FI$35.0M
first bought this quarter
first bought this quarter
first bought this quarter
first bought this quarter
+133 more in the Excel export
Added to (49)
now $27.3M · held 8+ qtrs
now $19.0M · held 2 qtrs
now $15.0M · held 2 qtrs, 2 adds in a row
now $27.1M · held 8+ qtrs
$TOSTToast, Inc.+150%
now $7.1M · held 2 qtrs, 2 adds in a row
$TKOTKO Group Holdings, Inc.+150%
now $3.1M · held 3 qtrs
+43 more in the Excel export
Trimmed (27)
$ETRENTERGY CORP /DE/-77%
now $4.5M · held 4 qtrs
$PKGPACKAGING CORP OF AMERICA-94%
now $885K · held 2 qtrs
now $18.1M · held 8+ qtrs, 2 trims in a row
$SOSOUTHERN CO-57%
now $8.0M · held 7 qtrs
$CHRWC. H. ROBINSON WORLDWIDE, INC.-75%
now $2.9M · held 2 qtrs
$MELIMERCADOLIBRE INC-62%
now $5.0M · held 7 qtrs
+21 more in the Excel export
Sold out (93)
- VERONA PHAwas $118.0M
- MR COOPERwas $43.5M
- SPIRIT AERwas $27.4M
- HALOZYME Twas $20.7M
- DUKE ENERGwas $16.1M
- AMERICAN Wwas $16.0M
+87 more in the Excel export
Holdings by quarter
Every 13F UBS OCONNOR LLC has filed, 12 earlier quarters. Pick one to see what it held then.
Is it too late to follow UBS OCONNOR?
Q4 2025 13F filed with the SEC on Feb 13, 2026. Prices are closing prices as of Oct 27, 2026.
Average quality of UBS OCONNOR's top 20 holdings: 61/100 (our AI quality score, weighted by position size; 18 of the 20 are scored)
Top 10 since filing
+14.6%
Value-weighted move of the 10 largest stock positions
Turnover
68%
Last quarter; 208% over the last 4
Top 10 weight
40%
Share of the stock portfolio in its 10 largest positions
Held 4+ quarters
21%
Share of portfolio value in positions held a year or more
Highest-quality names it owns(among its 100 largest positions)
The 8 highest-scoring companies in this portfolio are a Pro feature.
How these are measured
- Moves since the quarter-end and since the filing date use our own daily closing prices, from the close on (or just before) each date to the latest close.
- Turnover is the lesser of shares bought or sold in a quarter, valued at the quarter-end prices in the 13F, divided by the average of the two quarters' stock portfolio values.
- Quarters held and add/trim streaks count back only through quarters whose filed holdings add up to the filing's own cover-page total (back to Q1 2024 for this fund). A change counts as an add or a trim when the split-adjusted share count moves by more than 1%.
- Estimate, not the fund's reported cost. For each quarter in the current holding period in which the fund's share count rose (split-adjusted), we take that quarter's average daily close and weight it by the shares added; sales do not change an average cost. Quarters where the stock's price history and the 13F's own implied price disagree by more than 2x are left out.
- Put and call option rows report the value of the underlying shares, not a position the fund paid for, so they are left out of all of the above.
Portfolio Overview
UBS OCONNOR LLC disclosed 221 positions worth $880.7M in its Form 13F-HR for Q4 2025 — $847.6M in common stock plus $33.1M of put/call option positions (reported at underlying notional value, not premium at risk), led by $EXAS (EXACT SCIENCES CORP) at 11.1% of the equity portfolio. During the quarter the fund opened 139 new positions and exited 93 — including a new stake in $EXAS. The portfolio is most concentrated in Financials (17.3% of disclosed assets). All figures are sourced directly from UBS OCONNOR LLC’s Form 13F-HR filing with the SEC under CIK 1132716.
Browse Top Institutional Investors
13F Pro tracks 8,700+ institutional investors filing 13F reports with the SEC.
to search all 8,700+ institutional filers.
AI-Powered Hedge Fund Analysis: UBS OCONNOR LLC
13F Pro is an AI hedge fund tracker and stock research platform. For UBS OCONNOR LLC (SEC CIK: 1132716), the platform ingests every quarterly Form 13F filing and applies AI-powered analysis on top — 10 specialized AI analysts (value, growth, momentum, macro, activist, and more) debate the fund's top positions and publish AI-generated analysis with cited SEC sources.
Every holding in UBS OCONNOR LLC's portfolio is scored on an AI quality ranking built from its SEC filings (ROIC, FCF margin, revenue growth, institutional flow, earnings quality, shareholder dilution, and more). Track accumulation and distribution quarter over quarter, identify conviction positions, and see AI stock analysis for each position — alongside 8,700+ other institutional filers and 2,800+ AI-ranked companies.