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Livermore
Livermore
ZHEN

Westchester Capital Management, LLC

SEC CIK
0001512805
Latest filing
Aug 14, 2026

The latest 13F from Westchester Capital Management, LLC covers Q2 2026 (filed Aug 14, 2026): 300 long positions worth $1.99B. The top 10 holdings make up 50.1% of the portfolio, and the largest is Electronic Arts Inc. (EA) at 8.5%. Livermore has 23 filings on Form 13F from this institution, going back to Q1 2021.

What changed in Q2 2026

Share counts compared with Q1 2026: 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. +$261.0M
Added
27
Est. +$217.0M
Reduced
21
Est. −$85.4M
Sold out
71
Est. −$505.4M

Top 5 holdings

Share of this quarter's portfolio value

  1. EAElectronic Arts Inc.
    8.5%$169.4MHistory
  2. NSCNorfolk Southern Corp
    8.2%$162.2MHistory
  3. WBDWarner Bros. Discovery, Inc.
    7.7%$152.4MHistory
  4. GTLSChart Industries Inc
    6.4%$128.2MHistory
  5. WBSWebster Financial Corp
    5.4%$106.8MHistory

Share of portfolio

Top 5 holdings and the other 295 positions, by share of portfolio value

  1. EA8.5%
  2. NSC8.2%
  3. WBD7.7%
  4. GTLS6.4%
  5. WBS5.4%
  6. Other 295 positions63.9%

Biggest buys

New and added positions, by estimated amount bought

  1. ROKURoku, Inc
    +$43.4MNewHistory
  2. CZRCaesars Entertainment, Inc.
    +$35.0MAddedHistory
  3. PENPenumbra Inc
    +$25.5MAddedHistory
  4. QRVOQorvo, Inc.
    +$25.1MAddedHistory
  5. GTLSChart Industries Inc
    +$24.6MAddedHistory

Largest weight increases

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

  1. ROKURoku, Inc
    +2.18 pp0.0% → 2.2%History
  2. CZRCaesars Entertainment, Inc.
    +1.81 pp0.3% → 2.1%History
  3. QRVOQorvo, Inc.
    +1.51 pp1.0% → 2.5%History
  4. GTLSChart Industries Inc
    +1.48 pp5.0% → 6.4%History
  5. EAElectronic Arts Inc.
    +1.36 pp7.2% → 8.5%History

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. CWANClearwater Analytics Holdings, Inc.
    −$61.9MSold outHistory
  2. CTRACoterra Energy Inc.
    −$55.8MSold outHistory
  3. SEESealed Air Corp
    −$39.8MSold outHistory
  4. PRAProassurance Corp
    −$36.0MSold outHistory
  5. HOLXHologic Inc
    −$34.4MSold outHistory

Largest weight decreases

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

  1. CWANClearwater Analytics Holdings, Inc.
    −3.00 pp3.0% → 0.0%History
  2. CTRACoterra Energy Inc.
    −2.70 pp2.7% → 0.0%History
  3. SEESealed Air Corp
    −1.92 pp1.9% → 0.0%History
  4. PRAProassurance Corp
    −1.74 pp1.7% → 0.0%History
  5. HOLXHologic Inc
    −1.67 pp1.7% → 0.0%History

Metrics

13F metrics for Q2 2026, computed only from the numbers in the filings. Definitions below.

Portfolio value
$1.99B
−$77.1M (−3.7%) vs. prior quarter
Positions
300
+3 vs. prior quarter
Top 10 concentration
50.1%
Top 10 as share of value
Turnover
23.6%
Q2 2026, one quarter
Average holding period
3.3 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

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

Peak $3.93B (Q2 2021)

Q1 2021: $3.35BQ2 2021: $3.93BQ3 2021: $3.17BQ4 2021: $3.28BQ1 2022: $3.16BQ2 2022: $3.21BQ3 2022: $3.34BQ4 2022: $3.47BQ1 2023: $3.14BQ2 2023: $2.89BQ3 2023: $2.91BQ4 2023: $2.49BQ1 2024: $2.36BQ2 2024: $2.34BQ3 2024: $2.16BQ4 2024: $1.72BQ1 2025: $1.73BQ2 2025: $1.71BQ3 2025: $1.93BQ4 2025: $2.13BQ1 2026: $2.07BQ2 2026: $1.99B
Q1 2021Q2 2026
13F filings of Westchester Capital Management, LLC by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Aug 14, 2026300$1.99BEANSCWBDvs. Q1 2026SEC
Q1 2026May 15, 2026297$2.07BEANSCWBDvs. Q4 2025SEC
Q4 2025Feb 13, 2026277$2.13BCyberark Software LtdEANSCvs. Q3 2025SEC
Q3 2025Nov 14, 2025246$1.93BCOOPKCyberark Software Ltdvs. Q2 2025SEC
Q2 2025Aug 14, 2025203$1.71BHESKCHXvs. Q1 2025SEC
Q1 2025May 14, 2025161$1.73BHESKCHXvs. Q4 2024SEC
Q4 2024Feb 14, 2025159$1.72BHESEDRKvs. Q3 2024SEC
Q3 2024Nov 14, 2024183$2.16BHESEDRSWNvs. Q2 2024SEC
Q2 2024Aug 14, 2024213$2.34BHESEDRWRKvs. Q1 2024SEC
Q1 2024May 15, 2024230$2.36BPXDHESWRKvs. Q4 2023SEC
Q4 2023Feb 15, 2024257$2.49BPXDHESSPLKvs. Q3 2023SEC
Q3 2023Nov 8, 2023290$2.91BATVIHZNPSGENvs. Q2 2023SEC
Q2 2023Aug 14, 2023308$2.89BHZNPATVIVMWvs. Q1 2023SEC
Q1 2023May 15, 2023348$3.14BHZNPFHNVMWvs. Q4 2022SEC
Q4 2022Feb 14, 2023437$3.47BFHNHZNPVMWvs. Q3 2022SEC
Q3 2022Nov 17, 2022Amended473$3.34BBHVNFHNAAWWvs. Q2 2022SEC
Q2 2022Aug 15, 2022419$3.21BCoherent IncACCFHNvs. Q1 2022SEC
Q1 2022May 16, 2022412$3.16BCERNCoherent IncZNGAvs. Q4 2021SEC
Q4 2021Feb 14, 2022386$3.28BINFOXLNXNUANvs. Q3 2021SEC
Q3 2021Nov 15, 2021356$3.17BINFONUANCoherent Incvs. Q2 2021SEC
Q2 2021Aug 13, 2021321$3.93BWTWALXNINFOvs. Q1 2021SEC
Q1 2021May 17, 2021325$3.35BWTWVarian Med Sys IncALXN–SEC

13D and 13G filings

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

Current stakes of 5% or more

16 companies, largest stake first.

Companies where Westchester Capital Management, LLC owns 5% or more
CompanyLatest formStakeChangeFirst filedLatest filingFiling
OAKUOak Woods Acquisition Corp13G9.92%163.4K shares+9.92 ppfrom 0.00%Nov 14, 20243 filingsMay 15, 2026SEC
NETDNabors Energy Transition Corp. II13G9.37%1.29M sharesNewNov 14, 20251 filingNov 14, 2025SEC
Haymaker Acquisition Corp. 4Class A ordinary shares, $0.0001 par value per share13G/A8.25%1.93M shares+3.25 ppfrom 5.00%May 14, 20252 filingsNov 14, 2025SEC
GTERAGloba Terra Acquisition Corp13G8.01%1.40M sharesNewNov 14, 20251 filingNov 14, 2025SEC
RIBBRibbon Acquisition Corp.13G7.77%372.4K sharesNewMay 15, 20261 filingMay 15, 2026SEC
AA Mission Acquisition Corp.Class A ordinary shares, $0.0001 par value per share13G7.63%2.70M sharesNewNov 14, 20251 filingNov 14, 2025SEC
KDKKodiak AI, Inc.13G/A6.19%3.83M shares−1.71 ppfrom 7.90%Nov 14, 20243 filingsAug 14, 2025SEC
Agriculture & Natural Solutions Acquisition CorpClass A ordinary shares, $0.0001 par value per share13G/A5.97%1.96M shares−1.17 ppfrom 7.14%Feb 14, 20252 filingsFeb 13, 2026SEC
WPACWhite Pearl Acquisition Corp.13G5.93%701.9K sharesNewAug 14, 20261 filingAug 14, 2026SEC
FRLAFortune Rise Acquisition Corp13G5.73%86.4K sharesNewFeb 14, 20251 filingFeb 14, 2025SEC
PACHPioneer Acquisition I Corp13G5.65%1.25M sharesNewMay 15, 20261 filingMay 15, 2026SEC
GIWGigCapital8 Corp.13G5.14%1.32M sharesNewMay 15, 20261 filingMay 15, 2026SEC
CRACCrown Reserve Acquisition Corp. I13G5.09%878.4K sharesNewMay 15, 20261 filingMay 15, 2026SEC
DTSQDT Cloud Star Acquisition Corp13G/A5.09%183.5K shares−1.87 ppfrom 6.96%Aug 14, 20252 filingsFeb 13, 2026SEC
MMTXMiluna Acquisition Corp13G5.05%446.0K sharesNewMay 15, 20261 filingMay 15, 2026SEC
HDRNHadron Energy, Inc.13G5.00%999.0K sharesNewMay 14, 20251 filingMay 14, 2025SEC

Latest filings

109 filings on file made by Westchester Capital Management, LLC or listing it as a reporting person; the latest 20 are shown.

Schedule 13D and 13G filings by Westchester Capital Management, LLC
CompanyFiled (ET)FormStakeChangeEvent dateFiling
WPACWhite Pearl Acquisition Corp.Aug 14, 202611:38 AM ET13G5.93%701.9K sharesNewJun 30, 2026SEC
TAVITavia Acquisition Corp.Aug 14, 202611:33 AM ET13G/A0.00%0 shares−5.91 ppfrom 5.91%Below 5%Jun 30, 2026SEC
SZZLSizzle Acquisition Corp. IIAug 14, 202611:22 AM ET13G/A4.96%1.17M shares−1.65 ppfrom 6.61%Below 5%Jun 30, 2026SEC
LCCCLakeshore Acquisition III Corp.Aug 14, 202611:16 AM ET13G/A2.14%190.7K shares−5.53 ppfrom 7.67%Below 5%Jun 30, 2026SEC
TAVITavia Acquisition Corp.May 15, 20266:55 AM ET13G5.91%680.0K sharesNewMar 31, 2026SEC
SIMASIM Acquisition Corp. IMay 15, 20266:54 AM ET13G/A3.34%767.6K shares−1.99 ppfrom 5.33%Below 5%Mar 31, 2026SEC
RIBBRibbon Acquisition Corp.May 15, 20266:52 AM ET13G7.77%372.4K sharesNewMar 31, 2026SEC
PLMKPlum Acquisition Corp, IVMay 15, 20266:48 AM ET13G/A4.98%921.1K shares−1.64 ppfrom 6.62%Below 5%Mar 31, 2026SEC
PACHPioneer Acquisition I CorpMay 15, 20266:45 AM ET13G5.65%1.25M sharesNewMar 31, 2026SEC
OAKUOak Woods Acquisition CorpMay 15, 20266:41 AM ET13G9.92%163.4K shares+9.92 ppfrom 0.00%Mar 31, 2026SEC
MMTXMiluna Acquisition CorpMay 15, 20266:38 AM ET13G5.05%446.0K sharesNewMar 31, 2026SEC
KFIIK&F Growth Acquisition Corp. IIMay 15, 20266:34 AM ET13G/A4.98%1.48M shares−0.88 ppfrom 5.86%Below 5%Mar 31, 2026SEC
HAVAHarvard Ave Acquisition CorpMay 15, 20266:32 AM ET13G4.97%788.9K sharesNewBelow 5%Mar 31, 2026SEC
GIWGigCapital8 Corp.May 15, 20266:27 AM ET13G5.14%1.32M sharesNewMar 31, 2026SEC
CRACCrown Reserve Acquisition Corp. IMay 15, 20266:25 AM ET13G5.09%878.4K sharesNewMar 31, 2026SEC
HSPOFHorizon Space Acquisition I Corp.Feb 13, 20264:02 PM ET13G/A0.00%0 shares−7.12 ppfrom 7.12%Below 5%Dec 31, 2025SEC
FACTFACT II Acquisition Corp.Feb 13, 20264:02 PM ET13G/A4.98%921.1K shares−0.88 ppfrom 5.86%Below 5%Dec 31, 2025SEC
BACCBlue Acquisition Corp/CaymanFeb 13, 20264:02 PM ET13G/A1.77%369.6K shares−5.16 ppfrom 6.93%Below 5%Dec 31, 2025SEC
Agriculture & Natural Solutions Acquisition CorpClass A ordinary shares, $0.0001 par value per shareFeb 13, 20264:02 PM ET13G/A5.97%1.96M shares−1.17 ppfrom 7.14%Dec 31, 2025SEC
Patria Latin American Opportunity Acquisition Corp.Class A ordinary shares, $0.0001 par value per shareFeb 13, 20264:02 PM ET13G/A0.00%0 shares–Below 5%Dec 31, 2025SEC