Vault-13

BCK CAPITAL MANAGEMENT LP

STAMFORD, CT · CIK 1819275 · 13F filing filed 2026-05-01

No investment adviser registration (Form ADV) found for this filer. It may be a parent company whose subsidiaries are the registered advisers, a bank or insurer, or a manager based outside the US.

$23.0m reported value +27.8% vs Q4 2025
21positions
84.2%in top 10
17 new 0 added 0 reduced 2 sold out vs Q4 2025

Holdings, Q1 2026

The small lines show how much was held over the last 4 quarters (adjusted for stock splits).

#SecurityTickerShares Value% of portfolioChangeShares change
1 M3BRIGADE ACQUISITION V CORP CL A VLOS VLOS 388,000 $4.2m18.15% 18.15% UnchangedShares held: Q2 2025 0, Q3 2025 159.8k, Q4 2025 388.0k, Q1 2026 388.0k
2 CANTOR EQUITY PARTNERS I INC SHS CL A CEPO CEPO 388,000 $4.1m17.75% 17.75% UnchangedShares held: Q2 2025 0, Q3 2025 120.5k, Q4 2025 388.0k, Q1 2026 388.0k
3 YORKVILLE ACQUISITION CORP. SHS CL A MCGA MCGA 379,000 $3.8m16.69% 16.69% UnchangedShares held: Q2 2025 0, Q3 2025 97.7k, Q4 2025 379.0k, Q1 2026 379.0k
4 WARNER BROS DISCOVERY INC COM SER A WBD WBD 68,000 $1.9m8.13% 8.13% NewShares held: Q2 2025 0, Q3 2025 0, Q4 2025 0, Q1 2026 68.0k
5 ELECTRONIC ARTS INC COM EA EA 7,000 $1.4m6.22% 6.22% NewShares held: Q2 2025 0, Q3 2025 3.5k, Q4 2025 0, Q1 2026 7.0k
6 CHART INDS INC COM GTLS GTLS 5,500 $1.1m4.95% 4.95% NewShares held: Q2 2025 0, Q3 2025 20.6k, Q4 2025 0, Q1 2026 5.5k
7 HOLOGIC INC COM HOLX HOLX 14,000 $1.1m4.61% 4.61% NewShares held: Q2 2025 0, Q3 2025 0, Q4 2025 0, Q1 2026 14.0k
8 JANUS HENDERSON GROUP PLC ORD SHS ORD SHS 17,170 $882.0k3.84% 3.84% NewShares held: Q2 2025 0, Q3 2025 0, Q4 2025 0, Q1 2026 17.2k
9 ARCELLX INC COMMON STOCK ACLX ACLX 4,000 $459.3k2.00% 2.00% NewShares held: Q2 2025 0, Q3 2025 0, Q4 2025 0, Q1 2026 4.0k
10 AES CORP COM AES AES 30,000 $422.7k1.84% 1.84% NewShares held: Q2 2025 0, Q3 2025 0, Q4 2025 0, Q1 2026 30.0k
11 SEALED AIR CORP NEW COM COM 10,000 $420.5k1.83% 1.83% NewShares held: Q2 2025 0, Q3 2025 0, Q4 2025 0, Q1 2026 10.0k
12 UNIFIRST CORP MASS COM UNF UNF 1,600 $402.5k1.75% 1.75% NewShares held: Q2 2025 0, Q3 2025 0, Q4 2025 0, Q1 2026 1.6k
13 ALBERTSONS COS INC COMMON STOCK ACI ACI 21,730 $370.3k1.61% 1.61% UnchangedShares held: Q2 2025 235.2k, Q3 2025 56.2k, Q4 2025 21.7k, Q1 2026 21.7k
14 APELLIS PHARMACEUTICALS INC COM APLS APLS 8,000 $321.8k1.40% 1.40% NewShares held: Q2 2025 0, Q3 2025 0, Q4 2025 0, Q1 2026 8.0k
15 INTERNATIONAL MNY EXPRESS IN COM IMXI IMXI 20,000 $316.0k1.38% 1.38% NewShares held: Q2 2025 0, Q3 2025 91.8k, Q4 2025 0, Q1 2026 20.0k
16 DIGITALBRIDGE GROUP INC CL A NEW CL A NEW 20,000 $308.4k1.34% 1.34% NewShares held: Q2 2025 0, Q3 2025 0, Q4 2025 0, Q1 2026 20.0k
17 TRI POINTE HOMES INC COM TPH TPH 6,500 $303.7k1.32% 1.32% NewShares held: Q2 2025 0, Q3 2025 0, Q4 2025 0, Q1 2026 6.5k
18 NATHANS FAMOUS INC NEW COM NATH NATH 3,000 $302.2k1.32% 1.32% NewShares held: Q2 2025 0, Q3 2025 0, Q4 2025 0, Q1 2026 3.0k
19 ON24 INC COM ONTF ONTF 37,000 $299.7k1.31% 1.31% NewShares held: Q2 2025 0, Q3 2025 0, Q4 2025 0, Q1 2026 37.0k
20 CLEARWATER ANALYTICS HLDGS I CL A CL A 12,500 $295.6k1.29% 1.29% NewShares held: Q2 2025 0, Q3 2025 0, Q4 2025 0, Q1 2026 12.5k
21 AMICUS THERAPEUTICS INC COM FOLD FOLD 20,000 $289.2k1.26% 1.26% NewShares held: Q2 2025 0, Q3 2025 0, Q4 2025 0, Q1 2026 20.0k

Sold out since Q4 2025

SecurityTickerShares held beforeValue then
CHURCHILL CAPITAL CORP IX 380,000 $4.0m380.0k shares
BLEICHROEDER ACQUISITION COR MRLN MRLN 144,322 $1.5m144.3k shares