Westchester Capital Management, Llc
- Regulatory AUM
- $2.9B
- Discretionary
- $2.9B
- Clients
- 7
- Avg AUM / client
- $412M
- Accounts
- 7
- Employees
- 10
AUM over time
Annual snapshots from Form ADV filings · as of Mar 30, 2026
Investments (13F portfolio — 299 positions, $2,207,298,614)
13F period Mar 31, 2026| # | Issuer | Class | Value | Shares | % of 13F | % of AUM |
|---|---|---|---|---|---|---|
| 1 | Electronic Arts Inc | COM | $147,865,485 | 725,293 | 6.7% | 5.13% |
| 2 | Norfolk Southn Corp | COM | $143,970,106 | 501,638 | 6.52% | 4.99% |
| 3 | Warner Bros Discovery Inc | COM SER A | $143,701,392 | 5,233,117 | 6.51% | 4.98% |
| 4 | Webster Finl Corp | COM | $127,257,204 | 1,833,149 | 5.77% | 4.41% |
| 5 | Chart Inds Inc | COM | $102,559,992 | 496,058 | 4.65% | 3.56% |
| 6 | State Str Spdr S&P 500 Etf T | TR UNIT | $97,551,000 | 150,000 | 4.42% | 3.38% |
| 7 | Unifirst Corp Mass | COM | $65,027,462 | 258,466 | 2.95% | 2.25% |
| 8 | Clearwater Analytics Hldgs I | CL A | $61,958,129 | 2,619,794 | 2.81% | 2.15% |
| 9 | Coterra Energy Inc | COM | $55,814,303 | 1,588,341 | 2.53% | 1.94% |
| 10 | Digitalbridge Group Inc | CL A NEW | $45,309,326 | 2,938,348 | 2.05% | 1.57% |
| 11 | Sealed Air Corp New | COM | $39,766,980 | 945,707 | 1.8% | 1.38% |
| 12 | Proassurance Corp | COM | $35,968,614 | 1,455,041 | 1.63% | 1.25% |
| 13 | Hologic Inc | COM | $34,416,429 | 455,304 | 1.56% | 1.19% |
| 14 | Penumbra Inc | COM | $25,162,994 | 76,630 | 1.14% | 0.87% |
| 15 | Masimo Corp | COM | $24,622,188 | 138,428 | 1.12% | 0.85% |
| 16 | Agriculture & Nat Sol Acq Co | SHS CL A | $23,064,983 | 2,044,768 | 1.04% | 0.8% |
| 17 | Haymaker Acquisition Corp Iv | CLASS A | $22,221,261 | 1,939,028 | 1.01% | 0.77% |
| 18 | Air Lease Corp | CL A | $21,717,300 | 334,421 | 0.98% | 0.75% |
| 19 | Qorvo Inc | COM | $20,425,473 | 263,895 | 0.93% | 0.71% |
| 20 | Drugs Made In Amer Acqutn Co | ORD SHS | $17,524,500 | 1,669,000 | 0.79% | 0.61% |
| 21 | Onestream Inc | CL A | $16,259,952 | 677,498 | 0.74% | 0.56% |
| 22 | Sizzle Acquisition Corp. Ii | USD CL A ORD SHS | $16,023,504 | 1,561,745 | 0.73% | 0.56% |
| 23 | Aptiv Plc | COM SHS | $15,540,672 | 223,800 | 0.7% | 0.54% |
| 24 | K&F Growth Acquisition Corp | SHS CL A | $15,412,238 | 1,476,268 | 0.7% | 0.53% |
| 25 | Globa Terra Acquisition Cor | CL A ORD SHS | $14,497,898 | 1,414,429 | 0.66% | 0.5% |
Top 25 of 299 positions from the manager's latest Form 13F · source filing (EDGAR) ↗. 13F covers long US-listed positions only. "% of AUM" is share of the firm's total regulatory AUM (Form ADV Item 5.F).
Who they serve
| Client type | Clients | AUM | % of AUM |
|---|---|---|---|
| Investment companies | 7 | $2.9B | 100.0% |
People (8)
| Name | Role / title | Credentials | With firm since | Ownership |
|---|---|---|---|---|
| Angerthal, Michael, Aaron | Executive Vice President | Oct 2021 (5y) | Less than 5% | |
| Aylward, George, Robert | Chief Executive Officer | Oct 2021 (5y) | Less than 5% | |
| Behren, Roy, Douglas | Co President And Co Chief Investment Officer | Oct 2021 (5y) | Less than 5% | |
| Colomb, Christopher, J | Chief Operations Officer | Oct 2021 (5y) | Less than 5% | |
| Shannon, Michael, Thomas | Co President And Co Chief Investment Officer | Oct 2021 (5y) | Less than 5% | |
| Smirl, Richard, William | Executive Vice President | Oct 2021 (5y) | Less than 5% | |
| Wu, Casaundra, Lee | Assistant Managing Director And Chief Compliance Officer | Oct 2021 (5y) | Less than 5% | |
| Purkalitis, Andra, Cynthia | Executive Vice President And Chief Legal Officer | Nov 2023 (3y) | Less than 5% |
Entity owners (Schedule A/B)
| Entity | Title / status | Since | Sch. | Ownership |
|---|---|---|---|---|
| Virtus Partners, Inc. | Sole Member | Oct 2021 | A | 75% or more |
| Virtus Investment Partners, Inc. | Sole Shareholder | Oct 2021 | B | ≈ 56.25% – 100% via Virtus Partners, Inc. |
Undisclosed: 0% – 25% of the firm is not attributable from the filed Schedule A bands.
Estimated effective ownership (look-through of filed bands):
- Virtus Investment Partners, Inc.: 75% – 100% of Virtus Partners, Inc. × 75% – 100% direct ≈ 56.25% – 100% of the firm
Roster from the IAPD representatives feed; ownership and acquisition dates from Form ADV Schedule A/B. "Since" is the earliest filed registration or acquisition date.
Documents (1 archived)
| Form | Period | Size | |
|---|---|---|---|
| Form ADV (full filing) | 03/30/2026 | 1.92 MB | View · PDF · Source ↗ |
Archived copies of the firm's regulatory filings, versioned by content hash.
Disciplinary disclosures
No disciplinary events reported on the firm's latest Form ADV filing.
How they charge
- • Percentage of assets under management
Services
- • Portfolio management for investment companies
Custody
Firm reports it does not have custody of client funds or securities (Item 9.A).
No custodian data reported or mined yet.
Source
All data on this page comes from this firm's Form ADV filings, reproduced without modification. Latest filing: Mar 30, 2026.
View current Form ADV (SEC/IAPD) ↗