CIK: 0001512805
Total reported value
$2.2B
Reporting period: 2026-03-31 · Number of holdings: 863
Westchester Capital Management, LLC disclosed 863 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $2.2B and a quarterly turnover rate of 75.3%.
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Westchester Capital Management, LLC's disclosed holdings carry a Herfindahl concentration index of 0.026 — mathematically equivalent to about 38 equally-sized positions, well below its 863 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes vary widely across the portfolio (a coefficient of variation of 2.62), with a handful of outsized bets alongside many smaller positions.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Sector classification currently covers about 46% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
Add NSC
+29.4% $32.1M
Add WBD
+31.5% $29.0M
Add EA
+22.1% $26.5M
Trim SPY
-25.0% -$38.8M
Trim LBRDA
-68.6% -$17.3M
Add HO1
+42.4% $10.6M
Showing top 200 holdings (of 863 total)
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | EA | Electronic Arts INC | Stock-Comm Services | 6.70% | +1.60% | +22.07% | |
| 2 | NSC | Norfolk Southern CORP | Stock-Industrials | 6.52% | +1.82% | +29.42% | |
| 3 | WBD | Warner Bros Discovery INC | Stock-Comm Services | 6.51% | +1.69% | +31.49% | |
| 4 | WBS | Webster Financial CORP | Stock-Financials | 5.77% | +5.77% | NEW | |
| 5 | GTLS | Chart Industries INC | Stock-Industrials | 4.65% | — | — | |
| 6 | SPY | Ss Spdr S&p 500 ETF Trust-us | ETF-Large Cap & Growth | 4.42% | -1.31% | -25.00% | |
| 7 | UNF | Unifirst Corp/ma | Stock-Other | 2.95% | +2.95% | NEW | |
| 8 | CWAN | Clearwater Analytics Holdings, Inc. | Stock-Tech | 2.81% | +2.81% | NEW | |
| 9 | CTRA | Coterra Energy INC | Stock-Energy | 2.53% | +2.53% | NEW | |
| 10 | DBRG | Digitalbridge Group INC | Stock-Financials | 2.05% | +2.05% | NEW | |
| 11 | SDA | Sealed Air CORP | Stock-Consumer Disc | 1.80% | — | +10.79% | |
| 12 | PRA | Proassurance CORP | Stock-Other | 1.63% | — | -9.37% | |
| 13 | HO1 | Hologic INC | Stock-Other | 1.56% | +0.56% | +42.40% | |
| 14 | PEN | Penumbra INC | Stock-Healthcare | 1.14% | +1.14% | NEW | |
| 15 | MASI* | Masimo CORP | Stock-Other | 1.12% | +1.12% | NEW | |
| 16 | ANSCW | Agriculture & Natural Solutions Acquisition Corporation | Stock-Other | 1.04% | — | +4.08% | |
| 17 | ✓ | Haymaker Acquisition CORP Iv | Stock-Other | 1.01% | — | — | |
| 18 | AL | Air Lease CORP | Stock-Other | 0.98% | — | — | |
| 19 | QRVO | Qorvo INC | Stock-Tech | 0.93% | +0.93% | NEW | |
| 20 | ✓ | Drugs Made In Amer Acqutn Co | Stock-Other | 0.79% | — | — | |
| 21 | K4F | Onestream INC | Stock-Other | 0.74% | +0.74% | NEW | |
| 22 | ✓ | Sizzle Acquisition CORP. Ii | Stock-Other | 0.73% | — | -0.19% | |
| 23 | APTV | Aptiv PLC | Stock-Consumer Disc | 0.70% | — | — | |
| 24 | ✓ | Stock-Other | 0.70% | — | -21.68% | ||
| 25 | ✓ | Globa Terra Acquisition Cor | Stock-Other | 0.66% | — | — | |
| 26 | ✓ | Titan Acquisition CORP | Stock-Other | 0.63% | — | — | |
| 27 | ✓ | Stock-Other | 0.60% | — | +23.15% | ||
| 28 | ✓ | Oyster Enterprises Ii Acquis Ord Sh | Stock-Other | 0.60% | — | — | |
| 29 | ✓ | Kochav Defense Acqui Co S | Stock-Other | 0.60% | — | — | |
| 30 | ✓ | Soulpower Acquisition CORP | Stock-Other | 0.59% | — | — | |
| 31 | ✓ | Stock-Other | 0.59% | — | -7.41% | ||
| 32 | ✓ | Stock-Other | 0.58% | +0.41% | +208.02% | ||
| 33 | B | Barrick Mining CORP | Stock-Materials | 0.57% | +0.57% | NEW | |
| 34 | ✓ | Jackson Acquisition Co Ii | Stock-Other | 0.57% | — | — | |
| 35 | ✓ | Aldel Finl Ii INC | Stock-Other | 0.56% | — | — | |
| 36 | JHG | Janus Henderson Group plc | Stock-Financials | 0.54% | +0.54% | NEW | |
| 37 | ✓ | Stock-Other | 0.54% | — | — | ||
| 38 | ✓ | New Providence Acquisition C | Stock-Other | 0.52% | — | -11.73% | |
| 39 | CZR | Caesars Entertainment INC | Stock-Consumer Disc | 0.52% | +0.52% | NEW | |
| 40 | ✓ | Oxley Bridge Acq LTD | Stock-Other | 0.51% | — | +21.79% | |
| 41 | FDX | Fedex CORP | Stock-Industrials | 0.50% | +0.50% | NEW | |
| 42 | VOYG | Voyager Technologies, Inc. | Stock-Other | 0.47% | — | -23.77% | |
| 43 | ✓ | Stock-Other | 0.47% | — | — | ||
| 44 | ✓ | Stock-Other | 0.46% | — | +53.85% | ||
| 45 | ✓ | Stock-Other | 0.46% | — | — | ||
| 46 | ✓ | Stock-Other | 0.45% | — | +100.00% | ||
| 47 | KDP | Keurig Dr Pepper INC | Stock-Consumer Staples | 0.45% | — | +36.90% | |
| 48 | ✓ | Stock-Other | 0.44% | — | -24.81% | ||
| 49 | ✓ | Archimedes Tech Spac Partner | Stock-Other | 0.43% | — | — | |
| 50 | ✓ | Newbury Str Ii Acquisition C | Stock-Other | 0.43% | — | — |
Performance for Q3 2026
—
Performance Last 4 Quarters
—
Based on 0 months of available history
Based on 34% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 863 | $2.2B | 75 | |
| 2025-12-31 | 778 | $2.4B | 72 | |
| 2025-09-30 | 678 | $2.2B | 100 | |
| 2025-06-30 | 511 | $1.9B | 0 | |
| 2025-03-31 | 416 | $1.9B | 100 | |
| 2024-12-31 | 393 | $1.8B | 0 | |
| 2024-09-30 | 458 | $2.3B | 0 | |
| 2024-06-30 | 558 | $2.7B | 0 | |
| 2024-03-31 | 630 | $2.7B | 0 | |
| 2023-12-31 | 691 | $2.9B | 0 | |
| 2023-09-30 | 857 | $3.4B | 0 | |
| 2023-06-30 | 901 | $3.2B | 0 | |
| 2023-03-31 | 952 | $3.3B | 0 | |
| 2022-12-31 | 1195 | $3.6B | 0 | |
| 2022-09-30 | 1173 | $3.6B | 0 | |
| 2022-06-30 | 1106 | $3.6B | 0 | |
| 2022-03-31 | 1065 | $3.7B | 0 | |
| 2021-12-31 | 1041 | $3.5B | 0 | |
| 2021-09-30 | 613 | $3.5B | 0 | |
| 2021-06-30 | 553 | $4.3B | 91 | |
| 2021-03-31 | 561 | $3.6B | 90 | |
| 2020-12-31 | 386 | $3.1B | 100 | |
| 2020-09-30 | 309 | $2.4B | 76 | |
| 2020-06-30 | 257 | $2.3B | 90 | |
| 2020-03-31 | 329 | $2.6B | 91 | |
| 2019-12-31 | 257 | $2.8B | 100 | |
| 2019-09-30 | 241 | $2.6B | 93 | |
| 2019-06-30 | 209 | $3.1B | 75 | |
| 2019-03-31 | 200 | $2.7B | 100 | |
| 2018-12-31 | 193 | $2.3B | 100 | |
| 2018-09-30 | 195 | $2.6B | 60 | |
| 2018-06-30 | 197 | $2.5B | 58 | |
| 2018-03-31 | 210 | $2.6B | 62 | |
| 2017-12-31 | 176 | $2.6B | 82 | |
| 2017-09-30 | 153 | $3.2B | 64 | |
| 2017-06-30 | 189 | $3.3B | 78 | |
| 2017-03-31 | 204 | $3.6B | 92 | |
| 2016-12-31 | 184 | $4.0B | 100 | |
| 2016-09-30 | 172 | $3.5B | 78 | |
| 2016-06-30 | 205 | $4.4B | 76 | |
| 2016-03-31 | 189 | $5.0B | 78 | |
| 2015-12-31 | 223 | $5.7B | 72 | |
| 2015-09-30 | 322 | $6.2B | 75 | |
| 2015-06-30 | 350 | $8.0B | 100 | |
| 2015-03-31 | 170 | $3.7B | 100 | |
| 2014-12-31 | 263 | $6.2B | 53 | |
| 2014-09-30 | 330 | $8.1B | 78 | |
| 2014-06-30 | 371 | $7.8B | 66 | |
| 2014-03-31 | 381 | $7.6B | 56 | |
| 2013-12-31 | 380 | $6.8B | 90 | |
| 2013-09-30 | 286 | $5.5B | 65 | |
| 2013-06-30 | 324 | $5.4B | 100 |
Westchester Capital Management, LLC's most significant position changes for 2026-03-31: Sold out: Cyberark Software LTD; Sold out: Teck Resources Ltd-cls B (TECK); New buy: Webster Financial CORP (WBS); Sold out: Frontier Communications Pare (FYBR); Sold out: Exact Sciences CORP (EXK).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | NSC | Norfolk Southern CORP | +1.8% | +29.42% | Add |
| 2 | WBD | Warner Bros Discovery INC | +1.7% | +31.49% | Add |
| 3 | EA | Electronic Arts INC | +1.6% | +22.07% | Add |
| 4 | HO1 | Hologic INC | +0.6% | +42.40% | Add |
| 5 | ✓ | +0.4% | +208.02% | Add | |
| 6 | CCIX | Churchill Capital Corp IX | +0.4% | +1003.09% | Add |
| 7 | ✓ | +0.3% | +1178.50% | Add | |
| 8 | GPATU | GP-Act III Acquisition Corp. | -0.2% | -36.74% | Trim |
| 9 | ✓ | -0.2% | -61.46% | Trim | |
| 10 | HON | Honeywell International INC | -0.3% | -54.65% | Trim |
| 11 | KHC | Kraft Heinz Co/the | -0.3% | -87.25% | Trim |
| 12 | UTE0 | Cantaloupe INC | -0.4% | -69.36% | Trim |
| 13 | LBRDA | Liberty Broadband-a | -0.7% | -68.60% | Trim |
| 14 | SPY | Ss Spdr S&p 500 ETF Trust-us | -1.3% | -25.00% | Trim |
| 15 | ✓ | Cyberark Software LTD | — | EXIT | Sold out |
| 16 | TECK | Teck Resources Ltd-cls B | — | EXIT | Sold out |
| 17 | WBS | Webster Financial CORP | — | NEW | New buy |
| 18 | FYBR | Frontier Communications Pare | — | EXIT | Sold out |
| 19 | EXK | Exact Sciences CORP | — | EXIT | Sold out |
| 20 | RNAGBP | Avidity Biosciences INC | — | EXIT | Sold out |
| 21 | UNF | Unifirst Corp/ma | — | NEW | New buy |
| 22 | CWAN | Clearwater Analytics Holdings, Inc. | — | NEW | New buy |
| 23 | CMA | Comerica INC | — | EXIT | Sold out |
| 24 | CTRA | Coterra Energy INC | — | NEW | New buy |
| 25 | DBRG | Digitalbridge Group INC | — | NEW | New buy |
| 26 | DAY | Dayforce INC | — | EXIT | Sold out |
| 27 | YCY-UN | AA Mission Acquisition Corp. II | — | EXIT | Sold out |
| 28 | 8QR | Confluent Inc-class A | — | EXIT | Sold out |
| 29 | PEN | Penumbra INC | — | NEW | New buy |
| 30 | NGDN | New Gold INC | — | EXIT | Sold out |
| 31 | MASI* | Masimo CORP | — | NEW | New buy |
| 32 | TGNA | Tegna INC | — | EXIT | Sold out |
| 33 | QRVO | Qorvo INC | — | NEW | New buy |
| 34 | CSX | Csx CORP | — | EXIT | Sold out |
| 35 | K4F | Onestream INC | — | NEW | New buy |
| 36 | CADE | Cadence Bank | — | EXIT | Sold out |
| 37 | THS | Treehouse Foods INC | — | EXIT | Sold out |
| 38 | B | Barrick Mining CORP | — | NEW | New buy |
| 39 | JHG | Janus Henderson Group plc | — | NEW | New buy |
| 40 | CZR | Caesars Entertainment INC | — | NEW | New buy |
| 41 | FDX | Fedex CORP | — | NEW | New buy |
| 42 | APLSUSD | Apellis Pharmaceuticals INC | — | NEW | New buy |
| 43 | ✓ | — | NEW | New buy | |
| 44 | ✓ | — | EXIT | Sold out | |
| 45 | ✓ | — | NEW | New buy | |
| 46 | TASK | Taskus Inc-a | — | EXIT | Sold out |
| 47 | ✓ | — | EXIT | Sold out | |
| 48 | ✓ | Mountain Lake Acquisit CORP | — | NEW | New buy |
| 49 | VAL | Valaris Limited | — | NEW | New buy |
| 50 | ✓ | Yorkville Acquisition CORP. S | — | NEW | New buy |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-05-15 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-02-13 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-11-14 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-08-14 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-05-14 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-02-14 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-11-14 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-08-14 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-05-15 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-02-15 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-11-08 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-08-14 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-05-15 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-02-14 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-11-17 | Amendment | View on EDGAR |
| 2022-09-30 | 2022-11-15 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-08-15 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-05-16 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-02-14 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-11-15 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-08-13 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-05-17 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-02-12 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2020-11-16 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2020-08-14 | 13F-HR | View on EDGAR |
| 2020-03-31 | 2020-05-14 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2020-02-14 | 13F-HR | View on EDGAR |
| 2019-09-30 | 2019-11-14 | 13F-HR | View on EDGAR |
| 2019-06-30 | 2019-08-14 | 13F-HR | View on EDGAR |
| 2019-03-31 | 2019-05-15 | 13F-HR | View on EDGAR |
| 2018-12-31 | 2019-02-14 | 13F-HR | View on EDGAR |
| 2018-09-30 | 2018-11-14 | 13F-HR | View on EDGAR |
| 2018-06-30 | 2018-08-14 | 13F-HR | View on EDGAR |
| 2018-03-31 | 2018-05-15 | 13F-HR | View on EDGAR |
| 2017-12-31 | 2018-02-14 | 13F-HR | View on EDGAR |
| 2017-09-30 | 2017-11-14 | 13F-HR | View on EDGAR |
| 2017-06-30 | 2017-08-14 | 13F-HR | View on EDGAR |
| 2017-03-31 | 2017-05-15 | 13F-HR | View on EDGAR |
| 2016-12-31 | 2017-02-14 | 13F-HR | View on EDGAR |
| 2016-09-30 | 2016-11-14 | 13F-HR | View on EDGAR |
| 2016-06-30 | 2016-08-15 | 13F-HR | View on EDGAR |
| 2016-03-31 | 2016-05-16 | 13F-HR | View on EDGAR |
| 2015-12-31 | 2016-02-16 | 13F-HR | View on EDGAR |
| 2015-09-30 | 2015-11-16 | 13F-HR | View on EDGAR |
| 2015-06-30 | 2015-08-14 | 13F-HR | View on EDGAR |
| 2015-03-31 | 2015-07-22 | Amendment | View on EDGAR |
| 2015-03-31 | 2015-05-15 | 13F-HR | View on EDGAR |
| 2014-12-31 | 2015-02-17 | 13F-HR | View on EDGAR |
| 2014-09-30 | 2014-11-14 | 13F-HR | View on EDGAR |
| 2014-06-30 | 2014-08-14 | 13F-HR | View on EDGAR |
| 2014-03-31 | 2014-05-15 | 13F-HR | View on EDGAR |
| 2013-12-31 | 2014-02-14 | 13F-HR | View on EDGAR |
| 2013-09-30 | 2013-11-14 | 13F-HR | View on EDGAR |
| 2013-06-30 | 2013-08-14 | 13F-HR | View on EDGAR |
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