BCK CAPITAL MANAGEMENT LP — 13F Holdings & Portfolio
CIK 1819275 · latest 13F-HR filed 2026-05-01
BCK CAPITAL MANAGEMENT LP manages $23.0M in 13F-reported U.S. long-equity assets across 21 reported positions as of its 2026-03-31 13F-HR filing. Its largest disclosed positions are VLOS (18.15%), CEPO (17.75%), MCGA (16.69%). Quarter over quarter (versus its 2025-12-31 filing) the fund opened 17 new positions and exited 2; 0 existing positions rose in reported value and 0 fell.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
Long-equity book
Distinct positions
Filed 2026-05-01
vs 2025-12-31
Portfolio charts
Latest quarter's book, what changed, and how the portfolio has evolved across filings.
Portfolio map
Q1 26Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.
Sector mix
% of 13F valueSectors from each company's SIC code; funds and ETFs grouped separately.
Biggest buys and sells
Q4 25 → Q1 26Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.
13F assets and positions
2 quartersTotal reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.
Top positions over time
reported valueThe eight largest current positions, valued at each quarter end.
Concentration
top 10 = 84.2%Cumulative share of the portfolio held in the largest N positions.
As of the firm’s regulatory filing dated Mar 12, 2026.
CORNING, NY 14830
| Name | Title / Status | Ownership | Type |
|---|---|---|---|
| CREATH, SARAH, JEAN Control | OWNER since May 2015 | 50–75% | Individual |
| KAFFENBARGER, JAMES, ALLEN Control | OWNER/CHIEF COMPLIANCE OFFICER since May 2015 | 50–75% | Individual |
Ownership & leadership changes · 1 filing with changes since May 8, 2015
From the firm’s regulatory filings, newest first. Dates are filing dates: a filing that no longer lists someone does not say when they left.
- No longer listedBONO, MICHAEL, BARNEY · OWNER · 25–50% · control person · listed since May 2015
- ChangedCREATH, SARAH, JEAN · ownership 25–50% → 50–75%
- ChangedKAFFENBARGER, JAMES, ALLEN · ownership 25–50% → 50–75%
- ListedBONO, MICHAEL, BARNEY · OWNER · 25–50% · control person
- ListedCREATH, SARAH, JEAN · OWNER · 25–50% · control person
- ListedKAFFENBARGER, JAMES, ALLEN · OWNER/CHIEF COMPLIANCE OFFICER · 25–50% · control person
Quarter-over-quarter changes
Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.
New Positions
- WARNER BROS DISCOVERY INC$1.9M
- ELECTRONIC ARTS INC$1.4M
- CHART INDS INC$1.1M
- HOLOGIC INC$1.1M
- JANUS HENDERSON GROUP PLC$882.0K
BCK CAPITAL MANAGEMENT LP Holdings (2026-03-31)
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | M3BRIGADE ACQUISITION V CORP | VLOS | G63212107 | $4.2M | 18.15% | 388,000 | SH |
| 2 | CANTOR EQUITY PARTNERS I INC | CEPO | G1827K107 | $4.1M | 17.75% | 388,000 | SH |
| 3 | YORKVILLE ACQUISITION CORP. | MCGA | G98659116 | $3.8M | 16.69% | 379,000 | SH |
| 4 | WARNER BROS DISCOVERY INC | WBD | 934423104 | $1.9M | 8.13% | 68,000 | SH |
| 5 | ELECTRONIC ARTS INC | EA | 285512109 | $1.4M | 6.22% | 7,000 | SH |
| 6 | CHART INDS INC | GTLS | 16115Q308 | $1.1M | 4.95% | 5,500 | SH |
| 7 | HOLOGIC INC | HOLX | 436440101 | $1.1M | 4.61% | 14,000 | SH |
| 8 | JANUS HENDERSON GROUP PLC | JHG | G4474Y214 | $882.0K | 3.84% | 17,170 | SH |
| 9 | ARCELLX INC | ACLX | 03940C100 | $459.3K | 2.00% | 4,000 | SH |
| 10 | AES CORP | AES | 00130H105 | $422.7K | 1.84% | 30,000 | SH |
| 11 | SEALED AIR CORP NEW | SEE | 81211K100 | $420.5K | 1.83% | 10,000 | SH |
| 12 | UNIFIRST CORP MASS | UNF | 904708104 | $402.5K | 1.75% | 1,600 | SH |
| 13 | ALBERTSONS COS INC | ACI | 013091103 | $370.3K | 1.61% | 21,730 | SH |
| 14 | APELLIS PHARMACEUTICALS INC | APLS | 03753U106 | $321.8K | 1.40% | 8,000 | SH |
| 15 | INTERNATIONAL MONEY EXPRESS | IMXI | 46005L101 | $316.0K | 1.38% | 20,000 | SH |
| 16 | DIGITALBRIDGE GROUP INC | DBRG | 25401T603 | $308.4K | 1.34% | 20,000 | SH |
| 17 | TRI POINTE HOMES INC | TPH | 87265H109 | $303.7K | 1.32% | 6,500 | SH |
| 18 | NATHANS FAMOUS INC | NATH | 632347100 | $302.2K | 1.32% | 3,000 | SH |
| 19 | ON24 INC | ONTF | 68339B104 | $299.7K | 1.31% | 37,000 | SH |
| 20 | CLEARWATER ANALYTICS HLDGS I | CWAN | 185123106 | $295.6K | 1.29% | 12,500 | SH |
| 21 | AMICUS THERAPEUTIC | FOLD | 03152W109 | $289.2K | 1.26% | 20,000 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-03-31 | 2026-05-01 | $23.0M | 21 | 0001819275-26-000002 |
| 2025-12-31 | 2026-02-11 | $22.7M | 7 | 0001819275-26-000001 |