Skip to main content
Livermore
Livermore
ZHEN

UBS Oconnor LLC

SEC CIK
0001132716
Latest filing
Aug 14, 2026

The latest 13F from UBS Oconnor LLC covers Q4 2025 (filed Aug 14, 2026): 200 long positions worth $3.75B. The top 10 holdings make up 70.5% of the portfolio, and the largest is Cyberark Software Ltd at 12.4%. Livermore has 100 filings on Form 13F from this institution, going back to Q1 2021.

What changed in Q4 2025

Share counts compared with Q3 2025: how many positions were new, added to, reduced or sold out, and the biggest buys and sells. Dollar amounts are estimated at the quarter-end prices implied by the filing.

Full comparison
New
74
Est. +$2.01B
Added
15
Est. +$367.0M
Reduced
36
Est. −$128.8M
Sold out
100
Est. −$1.81B

Top 5 holdings

Share of this quarter's portfolio value

  1. Cyberark Software LtdM2682V108
    12.4%$464.2M
  2. GTLSChart Industries Inc
    10.1%$380.2MHistory
  3. CMAComerica Inc
    7.7%$287.9MHistory
  4. DAYDayforce, Inc.
    7.6%$283.3MHistory
  5. Avidity Biosciences, Inc.05370A108
    7.2%$268.1M

Biggest buys

New and added positions, by estimated amount bought

  1. CMAComerica Inc
    +$287.9MNewHistory
  2. DAYDayforce, Inc.
    +$283.3MNewHistory
  3. Avidity Biosciences, Inc.05370A108
    +$268.1MNew
  4. HOLXHologic Inc
    +$194.0MNewHistory
  5. EXASExact Sciences Corp
    +$180.7MNewHistory

Largest weight increases

New and added positions, by percentage points of the portfolio gained

  1. CMAComerica Inc
    +7.69 pp0.0% → 7.7%History
  2. DAYDayforce, Inc.
    +7.56 pp0.0% → 7.6%History
  3. Avidity Biosciences, Inc.05370A108
    +7.16 pp0.0% → 7.2%
  4. HOLXHologic Inc
    +5.18 pp0.0% → 5.2%History
  5. EXASExact Sciences Corp
    +4.82 pp0.0% → 4.8%History

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. VRNAVerona Pharma plc
    −$457.1MSold outHistory
  2. KKellanova
    −$289.8MSold outHistory
  3. COOPMaverick Merger Sub 2, LLC
    −$168.6MSold outHistory
  4. IPGInterpublic Group of Companies, Inc.
    −$132.0MSold outHistory
  5. INFAInformatica Inc.
    −$113.3MSold outHistory

Largest weight decreases

Reduced and sold-out positions, by percentage points of the portfolio lost

  1. VRNAVerona Pharma plc
    −13.74 pp13.7% → 0.0%History
  2. KKellanova
    −8.71 pp8.7% → 0.0%History
  3. COOPMaverick Merger Sub 2, LLC
    −5.07 pp5.1% → 0.0%History
  4. IPGInterpublic Group of Companies, Inc.
    −3.97 pp4.0% → 0.0%History
  5. INFAInformatica Inc.
    −3.41 pp3.4% → 0.0%History

Metrics

13F metrics for Q4 2025, computed only from the numbers in the filings. Definitions below.

Portfolio value
$3.75B
+$419.7M (+12.6%) vs. prior quarter
Positions
200
−26 vs. prior quarter
Top 10 concentration
70.5%
Top 10 as share of value
Turnover
54.9%
Q4 2025, one quarter
Average holding period
2.1 quarters
Weighted by value

How these are calculated

  • Portfolio value: the market value of all long positions in the 13F, as reported at quarter end, excluding options.
  • Top 10 concentration: the combined value of the 10 largest positions as a share of portfolio value.
  • Turnover: the smaller of this quarter's estimated purchases and estimated sales, divided by the average of this and last quarter's portfolio value. Estimates multiply the change in shares by the quarter-end price implied by the filing (market value divided by shares); new positions use this quarter's value and sold-out positions last quarter's. Only positions reported in shares count, and it is not calculated when the previous quarter was not filed.
  • Average holding period: how many consecutive quarters each current position has been held (including this one; a quarter without the position or without a filing starts the count over), weighted by this quarter's value. Counting starts with the first 13F in Livermore (Q1 2021), so positions held before then are understated.

13F filings by quarter

20 quarters, going back to Q1 2021. Bars show each quarter's 13F portfolio value; quarters without a filing are left blank.

Peak $11.5B (Q3 2021)

Q1 2021: $6.93BQ2 2021: $11.2BQ3 2021: $11.5BQ4 2021: $10.4BQ1 2022: $496.2MQ2 2022: $9.54BQ3 2022: $8.71BQ4 2022: $2.03BQ1 2023: $4.19BQ2 2023: $4.73BQ3 2023: $5.59BQ4 2023: $3.16BQ1 2024: $3.47BQ2 2024: $3.52BQ3 2024: $4.03BQ4 2024: $4.00BQ1 2025: $4.20BQ2 2025: $3.66BQ3 2025: $3.33BQ4 2025: $3.75B
Q1 2021Q4 2025
13F filings of UBS Oconnor LLC by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q4 2025Aug 14, 2026Amended200$3.75BCyberark Software LtdGTLSCMAvs. Q3 2025SECSECSECSEC
Q3 2025Aug 14, 2026Amended226$3.33BCyberark Software LtdVRNAKvs. Q2 2025SECSECSECSEC
Q2 2025Aug 14, 2026Amended288$3.66BKWBASKXvs. Q1 2025SECSECSECSECSEC
Q1 2025May 15, 2026Amended264$4.20BHESDFSITCIvs. Q4 2024SECSECSECSECSEC
Q4 2024Feb 13, 2026Amended338$4.00BHESJNPRKvs. Q3 2024SECSECSECSECSEC
Q3 2024Nov 14, 2025Amended404$4.03BHESKCTLTvs. Q2 2024SECSECSECSECSEC
Q2 2024Aug 14, 2025Amended431$3.52BHESJNPRHCPvs. Q1 2024SECSECSECSECSEC
Q1 2024May 15, 2025Amended421$3.47BPXDHESJNPRvs. Q4 2023SECSECSECSECSEC
Q4 2023Feb 14, 2025Amended423$3.16BPXDSPLKHESvs. Q3 2023SECSECSECSEC
Q3 2023Aug 14, 2024Amended474$5.59BATVIHZNPSGENvs. Q2 2023SECSECSECSEC
Q2 2023Aug 14, 2024Amended514$4.73BHZNPSGENATVIvs. Q1 2023SECSECSECSECSEC
Q1 2023May 15, 2024Amended559$4.19BHZNPATVIUNVRvs. Q4 2022SECSECSECSECSEC
Q4 2022Feb 14, 2024Amended14$2.03BATVIHZNPFHNvs. Q3 2022SECSECSEC
Q3 2022Nov 14, 2023Amended909$8.71BBHVNZENATVIvs. Q2 2022SECSECSECSECSEC
Q2 2022Aug 14, 2023Amended922$9.54BROGACCATVIvs. Q1 2022SECSECSECSECSEC
Q1 2022May 16, 2023Amended3$496.2MATVITGNATSEMvs. Q4 2021SEC
Q4 2021Nov 14, 2022Amended880$10.4BINFONUANXLNXvs. Q3 2021SECSECSECSEC
Q3 2021Jun 9, 2022Amended859$11.5BNUANINFOPPDvs. Q2 2021SECSECSECSEC
Q2 2021Aug 12, 2022Amended822$11.2BMXIMALXNINFOvs. Q1 2021SECSECSECSECSECSEC
Q1 2021May 16, 2022Amended781$6.93BINFOVarian Med Sys IncWORK–SECSECSECSECSEC

13D and 13G filings

Companies where UBS Oconnor LLC reports owning 5% or more on Schedule 13D or 13G, and its latest filings.

Current stakes of 5% or more

UBS Oconnor LLC does not currently report owning 5% or more of any company.

Latest filings

92 filings on file made by UBS Oconnor LLC or listing it as a reporting person; the latest 20 are shown.

Schedule 13D and 13G filings by UBS Oconnor LLC
CompanyFiled (ET)FormStakeChangeEvent dateFiling
ELBMElectra Battery Materials CorpApr 29, 20262:17 PM ET13G/A0.00%0 shares−9.90 ppfrom 9.90%Below 5%Mar 31, 2026SEC
ELBMElectra Battery Materials CorpOct 24, 20253:32 PM ET13G9.90%9.28M shares0.00 ppfrom 9.90%Oct 22, 2025SEC
ELBMElectra Battery Materials CorpOct 24, 20253:15 PM ET13D/A9.90%9.28M shares+5.00 ppfrom 4.90%Oct 22, 2025SEC
ELBMElectra Battery Materials CorpSep 18, 20254:00 PM ET13D/A4.90%918.2K shares0.00 ppfrom 4.90%Below 5%Sep 17, 2025SEC
ELBMElectra Battery Materials CorpAug 25, 20258:32 AM ET13D/A4.90%918.2K shares0.00 ppfrom 4.90%Below 5%Aug 21, 2025SEC
ELBMElectra Battery Materials CorpJul 25, 20259:11 AM ET13D4.90%918.2K sharesNewBelow 5%Jul 21, 2025SEC
NPABNew Providence Acquisition Corp. IIJan 14, 20251:42 PM ET13G/A0.00%0 shares–Below 5%Dec 31, 2024SEC
NPABNew Providence Acquisition Corp. IIJun 6, 202413G/AOld format–––SEC
AfterNext HealthTech Acquisition Corp.Feb 12, 202413G/AOld format–––SEC
XAGELongevity Health Holdings, Inc.Feb 12, 202413G/AOld format–––SEC
Conyers Park III Acquisition Corp.Feb 12, 202413G/AOld format–––SEC
Counter Press Acquisition CorpFeb 12, 202413G/AOld format–––SEC
DTRT Health Acquisition Corp.Feb 12, 202413G/AOld format–––SEC
Far Peak Acquisition CorpFeb 9, 202413G/AOld format–––SEC
Generation Asia I Acquisition LtdFeb 9, 202413G/AOld format–––SEC
Gesher I Acquisition Corp.Feb 9, 202413G/AOld format–––SEC
HPLTHome Plate Acquisition CorpFeb 9, 202413G/AOld format–––SEC
NewHold Investment Corp. IIFeb 9, 202413G/AOld format–––SEC
Prime Impact Acquisition IFeb 9, 202413G/AOld format–––SEC
TGVCTG Venture Acquisition Corp.Feb 9, 202413G/AOld format–––SEC