AI Portfolio Summary
In 2025 Q4, Westchester Capital Management, LLC maintained a portfolio of 342 distinct positions. The most significant new addition to the portfolio was EXACT SCIENCES CORP, which now represents 3.21% of the total fund value. They heavily accumulated shares in CYBERARK SOFTWARE LT, increasing their position by 17.9%. The fund also reduced its exposure to LIBERTY BROADBAND CO by 29.8%.
Total Positions
342
Quarter
2025 Q4
Top Holding
CYBR (6.1%)
Top 10 Concentration
43.4%
Turnover Rate
23.4%
Sector HHI
0.18
Items per page:
Showing 1-50 of 342
| Stock | History | Sector / Type | Port % | Prev % | Rank / Prev | Conviction | Change | % Change | Influence | Shares | Mkt Value | Avg Cost | Price Held | 1st Owned | Source | Source Date | Date Reported |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
CYBR
CYBERARK SOFTWA...
|
Technology | 6.14% | 6.14% |
#1
2
Prev: #3
|
6.5 | 49,856 | 17.9% |
P
S
|
327,864 | $146,247,016 | 2025 Q3 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
SPY
PUT
SPDR S&P 500 ET...
|
PUT Option | 5.73% | 6.09% |
#2
2
Prev: #4
|
4.8 | no change | no change |
P
S
|
200,000 | $136,384,000 | 2010 Q4 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
EA
ELECTRONIC ARTS...
|
Communication Services | 5.10% | 1.19% |
#3
13
Prev: #16
|
6.0 | 464,995 | 360.0% |
P
S
|
594,161 | $121,404,918 | 2025 Q3 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
NSC
NORFOLK SOUTHN ...
|
Industrials | 4.70% | 1.80% |
#4
9
Prev: #13
|
5.4 | 256,771 | 196.3% |
P
S
|
387,596 | $111,906,717 | 2025 Q3 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
WBD
WARNER BROS DIS...
|
Communication Services | 4.42% | 1.14% |
#5
12
Prev: #17
|
5.3 | 2,371,301 | 185.5% |
P
S
|
3,649,601 | $105,181,501 | 2010 Q4 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
GTLS
CHART INDS INC
|
Industrials | 4.30% | 5.03% |
#6
1
Prev: #5
|
2.2 | -53,274 | -9.7% |
P
S
|
496,058 | $102,302,042 | 2025 Q3 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
FYBR
FRONTIER COMMUN...
|
Communication Services | 3.69% | 3.58% |
#7
Prev: #7
|
3.5 | 215,365 | 10.3% |
P
S
|
2,308,994 | $87,903,401 | 2024 Q3 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
EXAS
EXACT SCIENCES ...
|
Healthcare | 3.21% | — |
#8
Prev: #—
|
4.8 | 751,561 | no change |
NEW
|
751,561 | $76,328,535 | 2025 Q4 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
TECK
TECK RESOURCES ...
|
Basic Materials | 3.15% | 3.74% |
#9
3
Prev: #6
|
1.8 | -297,334 | -16.0% |
P
S
|
1,566,212 | $75,005,893 | 2023 Q2 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
RNA
AVIDITY BIOSCIE...
|
Healthcare | 2.92% | — |
#10
Prev: #—
|
4.7 | 962,659 | no change |
NEW
|
962,659 | $69,436,594 | 2025 Q4 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
TECK
PUT
TECK RESOURCES ...
|
PUT Option | 2.57% | 3.32% |
#11
3
Prev: #8
|
1.0 | -375,800 | -22.7% |
P
S
|
1,278,900 | $61,246,521 | 2023 Q2 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
CMA
COMERICA INC
|
Financial Services | 2.40% | — |
#12
Prev: #—
|
4.5 | 658,366 | no change |
NEW
|
658,366 | $57,231,757 | 2025 Q4 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
PRA
PROASSURANCE CO...
|
Financial Services | 1.63% | 1.93% |
#13
1
Prev: #12
|
1.2 | -155,669 | -8.8% |
P
S
|
1,605,544 | $38,789,942 | 2025 Q1 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
DAY
DAYFORCE INC
|
Technology | 1.59% | — |
#14
Prev: #—
|
4.1 | 546,665 | no change |
NEW
|
546,665 | $37,807,351 | 2025 Q4 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
SEE
SEALED AIR CORP...
|
Consumer Cyclical | 1.49% | — |
#15
Prev: #—
|
4.1 | 853,621 | no change |
NEW
|
853,621 | $35,365,518 | 2017 Q1 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
AAM
AA MISSION ACQU...
|
Financial Services | 1.21% | 1.30% |
#16
2
Prev: #14
|
1.5 | no change | no change |
P
S
|
2,701,172 | $28,821,505 | 2024 Q3 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
CFLT
CONFLUENT INC
|
Technology | 1.09% | — |
#17
Prev: #—
|
3.9 | 857,198 | no change |
NEW
|
857,198 | $25,921,667 | 2025 Q4 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
LBRDA
LIBERTY BROADBA...
|
Communication Services | 1.08% | 2.19% |
#18
7
Prev: #11
|
0.4 | -225,583 | -29.8% |
P
S
|
530,942 | $25,633,881 | 2025 Q1 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
NGD
NEW GOLD INC CD...
|
Basic Materials | 1.04% | — |
#19
Prev: #—
|
3.9 | 2,852,255 | no change |
NEW
|
2,852,255 | $24,843,141 | 2025 Q4 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
HOLX
HOLOGIC INC
|
Healthcare | 1.00% | — |
#20
Prev: #—
|
3.9 | 319,734 | no change |
NEW
|
319,734 | $23,816,986 | 2025 Q4 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
TGNA
TEGNA INC
|
Communication Services | 0.97% | 1.11% |
#21
3
Prev: #18
|
1.4 | no change | no change |
P
S
|
1,192,134 | $23,139,320 | 2021 Q4 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
HYAC
HAYMAKER ACQUIS...
|
Financial Services | 0.93% | 1.01% |
#22
3
Prev: #19
|
1.4 | no change | no change |
P
S
|
1,939,028 | $22,066,139 | 2023 Q4 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
ANSC
AGRICULTURE & N...
|
Financial Services | 0.92% | 1.23% |
#23
8
Prev: #15
|
0.4 | -500,127 | -20.3% |
P
S
|
1,964,677 | $21,945,442 | 2024 Q1 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
AL
AIR LEASE CORP
|
Industrials | 0.90% | 0.45% |
#24
25
Prev: #49
|
3.4 | 180,721 | 117.6% |
P
S
|
334,421 | $21,479,862 | 2025 Q3 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
KFII
K&F GROWTH ACQU...
|
Financial Services | 0.82% | 0.88% |
#25
5
Prev: #20
|
1.3 | no change | no change |
P
S
|
1,885,000 | $19,490,900 | 2025 Q1 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
DMAA
DRUGS MADE IN A...
|
Financial Services | 0.73% | 0.78% |
#26
5
Prev: #21
|
1.3 | no change | no change |
P
S
|
1,669,000 | $17,307,530 | 2025 Q1 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
SZZL
SIZZLE ACQUISIT...
|
Financial Services | 0.67% | 0.72% |
#27
5
Prev: #22
|
1.3 | no change | no change |
P
S
|
1,564,728 | $15,897,636 | 2025 Q2 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
CTLP
CANTALOUPE INC
|
Technology | 0.62% | 0.67% |
#28
5
Prev: #23
|
1.2 | no change | no change |
P
S
|
1,389,401 | $14,755,439 | 2025 Q2 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
GPAT
GP-ACT III ACQU...
|
Financial Services | 0.61% | 0.54% |
#29
11
Prev: #40
|
2.7 | 250,000 | 22.5% |
P
S
|
1,360,852 | $14,561,117 | 2024 Q3 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
N/A
GLOBA TERRA ACQ...
|
—
|
Unknown | 0.60% | 0.65% |
#30
5
Prev: #25
|
1.2 | no change | no change |
P
S
|
1,414,429 | $14,285,733 | — | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | ||
|
CADE
CADENCE BANK
|
Financial Services | 0.59% | — |
#31
Prev: #—
|
3.7 | 328,564 | no change |
NEW
|
328,564 | $14,075,682 | 2021 Q2 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
N/A
SIDDHI ACQUISIT...
|
—
|
Unknown | 0.58% | 0.31% |
#32
36
Prev: #68
|
3.2 | 687,397 | 103.9% |
P
S
|
1,349,197 | $13,856,253 | — | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | ||
|
N/A
TITAN ACQUISITI...
|
—
|
Unknown | 0.58% | 0.62% |
#33
7
Prev: #26
|
1.2 | no change | no change |
P
S
|
1,344,693 | $13,796,550 | — | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | ||
|
VACH
VOYAGER ACQUISI...
|
Financial Services | 0.57% | 0.60% |
#34
4
Prev: #30
|
1.2 | no change | no change |
P
S
|
1,261,894 | $13,464,409 | 2024 Q4 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
SIMA
SIM ACQUISITION...
|
Financial Services | 0.57% | 0.61% |
#35
8
Prev: #27
|
1.2 | no change | no change |
P
S
|
1,270,312 | $13,452,604 | 2024 Q3 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
N/A
NEW PROVIDENCE ...
|
—
|
Unknown | 0.55% | — |
#36
Prev: #—
|
3.7 | 1,278,999 | no change |
NEW
|
1,278,999 | $13,122,530 | — | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | ||
|
N/A
OYSTER ENTERPRI...
|
—
|
Unknown | 0.55% | 0.20% |
#37
61
Prev: #98
|
3.2 | 850,000 | 191.0% |
P
S
|
1,295,112 | $13,093,583 | — | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | ||
|
THS
TREEHOUSE FOODS...
|
Consumer Defensive | 0.55% | — |
#38
Prev: #—
|
3.7 | 553,686 | no change |
NEW
|
553,686 | $13,061,453 | 2025 Q4 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
N/A
KOCHAV DEFENSE ...
|
—
|
Unknown | 0.55% | 0.13% |
#39
81
Prev: #120
|
3.2 | 1,000,000 | 349.7% |
P
S
|
1,286,000 | $13,040,040 | — | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | ||
|
SOUL
SOULPOWER ACQUI...
|
Financial Services | 0.55% | 0.59% |
#40
7
Prev: #33
|
1.2 | no change | no change |
P
S
|
1,279,300 | $12,984,894 | 2025 Q3 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
PLMK
PLUM ACQUISITIO...
|
Financial Services | 0.54% | 0.58% |
#41
7
Prev: #34
|
1.2 | no change | no change |
P
S
|
1,225,000 | $12,776,750 | 2025 Q1 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
JACS
JACKSON ACQUISI...
|
Financial Services | 0.52% | 0.56% |
#42
6
Prev: #36
|
1.2 | no change | no change |
P
S
|
1,186,200 | $12,360,204 | 2025 Q2 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
ALDF
ALDEL FINL II I...
|
Financial Services | 0.51% | 0.55% |
#43
4
Prev: #39
|
1.2 | no change | no change |
P
S
|
1,159,448 | $12,185,798 | 2024 Q4 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
POLE
ANDRETTI ACQUIS...
|
Financial Services | 0.49% | 0.56% |
#44
6
Prev: #38
|
0.7 | -50,500 | -4.3% |
P
S
|
1,111,416 | $11,714,325 | 2024 Q4 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
CSX
PUT
CSX CORP
|
PUT Option | 0.46% | 0.31% |
#45
22
Prev: #67
|
3.2 | 108,200 | 56.5% |
P
S
|
299,800 | $10,867,750 | 2017 Q1 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
N/A
GIGCAPITAL8 COR...
|
—
|
Unknown | 0.45% | — |
#46
Prev: #—
|
3.7 | 1,080,000 | no change |
NEW
|
1,080,000 | $10,681,200 | — | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | ||
|
HON
PUT
HONEYWELL INTL ...
|
PUT Option | 0.44% | 0.45% |
#47
1
Prev: #48
|
2.2 | 6,100 | 13.0% |
P
S
|
53,200 | $10,378,788 | 2025 Q1 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
AACB
ARTIUS II ACQUI...
|
Financial Services | 0.43% | 0.46% |
#48
2
Prev: #46
|
1.2 | no change | no change |
P
S
|
995,939 | $10,258,172 | 2025 Q2 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | |||
|
N/A
D. BORAL ARC AC...
|
—
|
Unknown | 0.42% | 0.50% |
#49
7
Prev: #42
|
0.7 | -103,784 | -9.4% |
P
S
|
1,002,475 | $10,054,824 | — | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) | ||
|
LPBB
LAUNCH TWO ACQU...
|
Financial Services | 0.42% | 0.45% |
#50
3
Prev: #47
|
1.2 | no change | no change |
P
S
|
950,000 | $9,975,000 | 2024 Q4 | 13F Filing | 2025-12-31 | 2026-02-14 (Est.) |
Showing 1-50 of 342 holdings