BCK Capital Management LP
In its 13F for Q2 2025 (holdings as of June 30, 2025, filed August 7, 2025), BCK Capital Management LP reported 71 stock positions worth $115.1 million. Its top holding was Kellanova (K) at 11.8% of the portfolio, followed by Juniper Networks (JNPR, 7.7%) and GMS (GMS, 6.1%). Compared with Q1 2025, it opened 35 new positions, sold out of 23, added to 6 and reduced 9. The biggest buy was a new position in GMS (GMS) and the biggest sale an exit from United States Steel (X).
- Most Recent 13F
- Q1 2026
- Location
- STAMFORD, CT
- CIK
- 0001819275
- Portfolio Value
- $115.1M (Q2 2025)
- SEC Filing
- 0001085146-25-004668 ↗ filed Aug 7, 2025
Holdings Value
Holdings 71 stocks · $115.1M
| K Kellanova | 11.82% | 171,027 | $13.6M | Reduce -16.1% |
| JNPR Juniper Networks Inc. | 7.73% | 222,681 | $8.9M | Reduce -23.3% |
| GMS GMS Inc. | 6.14% | 64,988 | $7.1M | New |
| ACI Albertsons Cos Inc. Class A | 4.39% | 235,151 | $5.1M | Reduce -3.2% |
| SPR Spirit Aerosystems Hold Class A | 4.30% | 129,860 | $5.0M | Add +75.1% |
| CCIR Cohen Circle Acquisitio Class A | 3.47% | 364,557 | $4.0M | Reduce -50.9% |
| SKX Skechers USA Inc. Class A | 3.05% | 55,703 | $3.5M | New |
| RDUS Radius Recycling Inc. Class A | 2.40% | 92,917 | $2.8M | Add +85.8% |
| SAGE Sage Therapeutics Inc. | 2.35% | 297,040 | $2.7M | New |
| RNW Renew Energy Global PLC-A | 2.34% | 389,770 | $2.7M | Reduce -30.3% |
| GOOGL Alphabet Inc. Class A | 2.16% | 14,139 | $2.5M | Add +41.4% |
| WSC Willscot Holdings Corp. | 1.93% | 81,139 | $2.2M | No change |
| TXNM TXNM Energy Inc. | 1.82% | 37,109 | $2.1M | New |
| AAPL Apple Inc. | 1.78% | 9,996 | $2.1M | Add +53.8% |
| ALE Allete Inc. | 1.55% | 27,837 | $1.8M | No change |
| MAG Mag Silver Corp. | 1.43% | 78,000 | $1.6M | New |
| ANSS Ansys Inc. | 1.41% | 4,629 | $1.6M | No change |
| GENI Genius Sports Ltd. | 1.34% | 148,533 | $1.5M | No change |
| IP International Paper Co. | 1.32% | 32,457 | $1.5M | No change |
| FYBR Frontier Communications Pare | 1.30% | 41,000 | $1.5M | No change |
| SPTN Spartannash Co. | 1.27% | 55,000 | $1.5M | New |
| FARO Faro Technologies Inc. | 1.26% | 33,000 | $1.4M | New |
| HONE Harborone Bancorp Inc. | 1.25% | 123,000 | $1.4M | New |
| PRA Proassurance Corp. | 1.21% | 61,000 | $1.4M | No change |
| BRR Columbus Circle Capital Co. Class A | 1.20% | 130,000 | $1.4M | New |
| CCIX Churchill Capital Corp. Ix | 1.19% | 129,964 | $1.4M | New |
| FL Foot Locker Inc. | 1.19% | 55,701 | $1.4M | New |
| STR Sitio Royalties Corp. Class A | 1.17% | 73,000 | $1.3M | New |
| IONQ Ionq Inc. | 1.07% | 28,610 | $1.2M | Reduce -25.2% |
| HES Hess Corp. | 1.02% | 8,500 | $1.2M | No change |
| MAC COPPER LTD | 0.99% | 93,935 | $1.1M | New |
| CCCXU Churchill Capital Corp. X | 0.98% | 110,000 | $1.1M | New |
| GSRT GSR III Acquisition Corp. | 0.91% | 97,535 | $1.1M | New |
| ALF Centurion Acquisition Corp. | 0.91% | 100,000 | $1.1M | New |
| ARES ACQUISITION CORP II | 0.91% | 92,834 | $1.1M | Add +25.0% |
| MRLN Merlin Inc. filed as BLEICHROEDER ACQUISITION COR | 0.90% | 100,000 | $1.0M | New |
| JACS Jackson Acquisition Co. Class A | 0.89% | 100,000 | $1.0M | New |
| PLMK Plum Acquisition Corp. IV | 0.89% | 100,000 | $1.0M | New |
| BPMC Blueprint Medicines Corp. | 0.85% | 7,600 | $974K | New |
| ANSC Agriculture & Natural Soluti | 0.83% | 87,534 | $950K | Add +135.7% |
| SWTX Springworks Therapeutics Inc. | 0.82% | 20,000 | $940K | New |
| CHX Championx Corp. | 0.75% | 34,909 | $867K | No change |
| COLOMBIER ACQUISITION CORP | 0.75% | 55,689 | $861K | Reduce -90.8% |
| VSTS Vestis Corp. | 0.74% | 147,716 | $846K | Reduce -11.6% |
| DNB Dun & Bradstreet Holdings Inc. | 0.73% | 92,834 | $844K | Reduce -64.3% |
| CCRN Cross Country Healthcare Inc. | 0.67% | 59,250 | $773K | No change |
| CTLP Cantaloupe Inc. | 0.64% | 67,000 | $736K | New |
| WBA Walgreens Boots Alliance Inc. | 0.63% | 63,000 | $723K | No change |
| TGI Triumph Group Inc. | 0.63% | 28,000 | $721K | No change |
| AVDX Avidxchange Holdings Inc. | 0.61% | 72,000 | $705K | New |
| CEPT Cantor Equity Partners Class A | 0.60% | 62,500 | $689K | New |
| BASE Couchbase Inc. | 0.55% | 25,994 | $634K | New |
| KVUE Kenvue Inc. | 0.50% | 27,500 | $576K | No change |
| OBAWU Oxley Bridge Acquisition Ltd. | 0.47% | 53,750 | $538K | New |
| LWACU Lightwave Acquisition Corp. | 0.46% | 52,500 | $528K | New |
| MACI Melar Acquisition Corp. I-A | 0.46% | 50,000 | $526K | New |
| SIMA Sim Acquisition Corp. I-A | 0.45% | 50,000 | $521K | New |
| DRDB Roman DBDR Acquisition Corp. | 0.45% | 50,203 | $518K | New |
| KCHVU Kochav Defense Acquisition C | 0.44% | 50,000 | $509K | New |
| CGCTU Cartesian Growth Corp. III | 0.44% | 50,000 | $507K | New |
| SRDX Surmodics Inc. | 0.44% | 17,000 | $505K | No change |
| AXINU Axiom Intelligence Acquisiti | 0.44% | 50,000 | $505K | New |
| DIS The Walt Disney Co. filed as DISNEY WALT CO | 0.42% | 3,925 | $487K | No change |
| HTZ Hertz Global Hldgs Inc. | 0.42% | 70,000 | $478K | No change |
| CAEP Cantor Equity Partners III-A | 0.39% | 42,500 | $448K | New |
| OAKU Oak Woods Acquisition Corp. Class A | 0.38% | 37,134 | $434K | No change |
| MX Magnachip Semiconductor Corp. | 0.26% | 74,268 | $296K | No change |
| MCGAU Yorkville Acquisition Corp. | 0.24% | 25,000 | $281K | New |
| PL Planet Labs PBC | 0.20% | 37,133 | $227K | No change |
| NXDR Nextdoor Holdings Inc. | 0.05% | 37,133 | $62K | No change |
| POLESTAR AUTOMOTIVE HLDG UK | 0.05% | 399,191 | $58K | No change |
Options reported separately and not counted above: ACI calls ($0), CORZ calls ($0), VSTS calls ($0), TLT calls ($0), EFA puts ($0), IWM puts ($0), JNPR calls ($0), JNPR puts ($0), WSC calls ($0).
Other holdings (4): bonds, preferreds, convertibles and warrants · $774K (not counted above)
| Security | Class | Shares / Principal | Value | Change |
|---|---|---|---|---|
| IONQ.WS Ionq Inc. -CW26 | *W EXP 09/30/202 | 19,929 | $631K | No change |
| HTZWW Hertz Global Hldgs Inc. -CW51 | *W EXP 06/30/205 | 30,777 | $112K | No change |
| KDKRW Ares Acquisition Corp. II-28 | *W EXP 99/99/999 | 27,850 | $31K | No change |
| GGROW Gogoro Inc. -CW27 | *W EXP 04/04/202 | 13,924 | $181 | No change |
Total filed on the 13F, all lines: $115.9M.
Portfolio Sells Q1 2025 → Q2 2025
| X United States Steel Corp. | Sold out | 0.00% | −14.04 |
| COLOMBIER ACQUISITION CORP | Reduce -90.8% | 0.75% | −4.26 |
| NETD Nabors Energy Transition C-A | Sold out | 0.00% | −3.96 |
| CCIR Cohen Circle Acquisitio Class A | Reduce -50.9% | 3.47% | −3.01 |
| LGTY Logility Supply Chain Soluti | Sold out | 0.00% | −1.91 |
| K Kellanova | Reduce -16.1% | 11.82% | −1.27 |
| ENFN Enfusion Inc. Class A | Sold out | 0.00% | −1.15 |
| HEES H&E Equipment Services Inc. | Sold out | 0.00% | −1.14 |
| ITCI Intra-Cellular Therapies Inc. | Sold out | 0.00% | −1.13 |
| NVRO Nevro LLC | Sold out | 0.00% | −1.13 |
| PLYA Playa Hotels & Resorts NV | Sold out | 0.00% | −1.11 |
| FNA Paragon 28 Inc. | Sold out | 0.00% | −1.11 |
| DNB Dun & Bradstreet Holdings Inc. | Reduce -64.3% | 0.73% | −1.08 |
| BECN Beacon Roofing Supply Inc. | Sold out | 0.00% | −1.07 |
| DESP Despegar.com Corp. | Sold out | 0.00% | −0.95 |
| CMRX Chimerix Inc. | Sold out | 0.00% | −0.75 |
| TSVT 2SEVENTY Bio Inc. | Sold out | 0.00% | −0.73 |
| PYCR Paycor HCM Inc. | Sold out | 0.00% | −0.71 |
| AGS Playags Inc. | Sold out | 0.00% | −0.61 |
| EVRI Everi Holdings Inc. | Sold out | 0.00% | −0.60 |
| JWN Nordstrom Inc. | Sold out | 0.00% | −0.56 |
| PDCO Patterson Cos Inc. | Sold out | 0.00% | −0.56 |
| AMPS Altus Power Inc. | Sold out | 0.00% | −0.56 |
| VSTS Vestis Corp. | Reduce -11.6% | 0.74% | −0.55 |
| ATSG Air Transport Services Group | Sold out | 0.00% | −0.55 |
| AITR AI Transportation Acquisitio | Sold out | 0.00% | −0.48 |
| JNPR Juniper Networks Inc. | Reduce -23.3% | 7.73% | −0.46 |
| BAYA Bayview Acquisition Corp. Class A | Sold out | 0.00% | −0.42 |
| RNW Renew Energy Global PLC-A | Reduce -30.3% | 2.34% | −0.23 |
| SAIL Sailpoint Inc. | Sold out | 0.00% | −0.22 |
| ACI Albertsons Cos Inc. Class A | Reduce -3.2% | 4.39% | +0.23 |
| IONQ Ionq Inc. | Reduce -25.2% | 1.07% | +0.41 |
Portfolio Buys Q1 2025 → Q2 2025
| GMS GMS Inc. | New | 6.14% | +6.14 |
| SKX Skechers USA Inc. Class A | New | 3.05% | +3.05 |
| SAGE Sage Therapeutics Inc. | New | 2.35% | +2.35 |
| SPR Spirit Aerosystems Hold Class A | Add +75.1% | 4.30% | +2.31 |
| TXNM TXNM Energy Inc. | New | 1.82% | +1.82 |
| MAG Mag Silver Corp. | New | 1.43% | +1.43 |
| RDUS Radius Recycling Inc. Class A | Add +85.8% | 2.40% | +1.27 |
| SPTN Spartannash Co. | New | 1.27% | +1.27 |
| FARO Faro Technologies Inc. | New | 1.26% | +1.26 |
| HONE Harborone Bancorp Inc. | New | 1.25% | +1.25 |
| BRR Columbus Circle Capital Co. Class A | New | 1.20% | +1.20 |
| CCIX Churchill Capital Corp. Ix | New | 1.19% | +1.19 |
| FL Foot Locker Inc. | New | 1.19% | +1.19 |
| STR Sitio Royalties Corp. Class A | New | 1.17% | +1.17 |
| MAC COPPER LTD | New | 0.99% | +0.99 |
| CCCXU Churchill Capital Corp. X | New | 0.98% | +0.98 |
| GOOGL Alphabet Inc. Class A | Add +41.4% | 2.16% | +0.96 |
| GSRT GSR III Acquisition Corp. | New | 0.91% | +0.91 |
| ALF Centurion Acquisition Corp. | New | 0.91% | +0.91 |
| MRLN Merlin Inc. | New | 0.90% | +0.90 |
| JACS Jackson Acquisition Co. Class A | New | 0.89% | +0.89 |
| PLMK Plum Acquisition Corp. IV | New | 0.89% | +0.89 |
| BPMC Blueprint Medicines Corp. | New | 0.85% | +0.85 |
| SWTX Springworks Therapeutics Inc. | New | 0.82% | +0.82 |
| AAPL Apple Inc. | Add +53.8% | 1.78% | +0.66 |
| CTLP Cantaloupe Inc. | New | 0.64% | +0.64 |
| AVDX Avidxchange Holdings Inc. | New | 0.61% | +0.61 |
| CEPT Cantor Equity Partners Class A | New | 0.60% | +0.60 |
| BASE Couchbase Inc. | New | 0.55% | +0.55 |
| ANSC Agriculture & Natural Soluti | Add +135.7% | 0.83% | +0.52 |
| OBAWU Oxley Bridge Acquisition Ltd. | New | 0.47% | +0.47 |
| LWACU Lightwave Acquisition Corp. | New | 0.46% | +0.46 |
| MACI Melar Acquisition Corp. I-A | New | 0.46% | +0.46 |
| SIMA Sim Acquisition Corp. I-A | New | 0.45% | +0.45 |
| DRDB Roman DBDR Acquisition Corp. | New | 0.45% | +0.45 |
| KCHVU Kochav Defense Acquisition C | New | 0.44% | +0.44 |
| CGCTU Cartesian Growth Corp. III | New | 0.44% | +0.44 |
| AXINU Axiom Intelligence Acquisiti | New | 0.44% | +0.44 |
| CAEP Cantor Equity Partners III-A | New | 0.39% | +0.39 |
| ARES ACQUISITION CORP II | Add +25.0% | 0.91% | +0.27 |
| MCGAU Yorkville Acquisition Corp. | New | 0.24% | +0.24 |
Options Activity Q1 2025 → Q2 2025
| ACI Albertsons Cos Inc. Class A | call | Reduce -37.3% | 483,700 | $0 |
| AMED Amedisys Inc. | call | Sold out | 200,000 | $0before exit |
| CORZ Core Scientific Inc. | call | New | 200,000 | $0 |
| VSTS Vestis Corp. | call | Add +21.4% | 55,700 | $0 |
| EFA iShares MSCI Eafe ETF | put | New | 14,700 | $0 |
| IWM iShares Russell 2000 ETF | put | New | 19,000 | $0 |
| JNPR Juniper Networks Inc. | call | Add +325.7% | 547,900 | $0 |
| JNPR Juniper Networks Inc. | put | Add +73.2% | 462,200 | $0 |
| X United States Steel Corp. | call | Sold out | 1,082,800 | $0before exit |
| X United States Steel Corp. | put | Sold out | 421,200 | $0before exit |
| WSC Willscot Holdings Corp. | call | Add +33.7% | 98,400 | $0 |
Calls and puts are listed by the shares they cover; their value is not part of the stock holdings above.
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q1 2026 | 21 | $23.0M | VLOS, CEPO, MCGA, WBD, EA |
| Q4 2025 | 6 | $18.0M | VLOS, CCIX, CEPO, MCGA, MRLN |
| Q3 2025 | 83 | $93.0M | SPR, K, GTLS, CTLP, TXNM |
| Q2 2025 | 71 | $115.1M | K, JNPR, GMS, ACI, SPR |
| Q1 2025 | 59 | $128.4M | X, K, JNPR, CCIR, COLOMBIER ACQUISITION CORP |
| Q4 2024 | 54 | $138.2M | EDR, X, K, JNPR, HCP |
| Q3 2024 | 62 | $166.8M | EDR, SIRI, X, RCM, ACI |
| Q2 2024 | 70 | $154.6M | EDR, LSXMA, X, AGR, ACI |
| Q1 2024 | 65 | $146.8M | EVBG, X, EDR, LSXMA, PXD |