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Livermore
Livermore
ZHEN

BCK Capital Management LP

SEC CIK
0001819275
Latest filing
May 1, 2026

The latest 13F from BCK Capital Management LP covers Q1 2026 (filed May 1, 2026): 21 long positions worth $23.0M. The top 10 holdings make up 84.2% of the portfolio, and the largest is Velos Acquisition I Corp. (VLOS) at 18.2%. Livermore has 21 filings on Form 13F from this institution, going back to Q1 2021.

What changed in Q1 2026

Share counts compared with Q4 2025: how many positions were new, added to, reduced or sold out, and the biggest buys and sells. Dollar amounts are estimated at the quarter-end prices implied by the filing.

Full comparison
New
17
Est. +$10.5M
Added
0
Reduced
0
Sold out
2
Est. −$5.59M

Top 5 holdings

Share of this quarter's portfolio value

  1. VLOSVelos Acquisition I Corp.
    18.2%$4.17MHistory
  2. CEPOCantor Equity Partners I, Inc.
    17.7%$4.07MHistory
  3. MCGAYorkville Acquisition Corp.
    16.7%$3.83MHistory
  4. WBDWarner Bros. Discovery, Inc.
    8.1%$1.87MHistory
  5. EAElectronic Arts Inc.
    6.2%$1.43MHistory

Share of portfolio

Top 5 holdings and the other 16 positions, by share of portfolio value

  1. VLOS18.2%
  2. CEPO17.7%
  3. MCGA16.7%
  4. WBD8.1%
  5. EA6.2%
  6. Other 16 positions33.1%

Biggest buys

New and added positions, by estimated amount bought

  1. WBDWarner Bros. Discovery, Inc.
    +$1.87MNewHistory
  2. EAElectronic Arts Inc.
    +$1.43MNewHistory
  3. GTLSChart Industries Inc
    +$1.14MNewHistory
  4. HOLXHologic Inc
    +$1.06MNewHistory
  5. JHGJanus Henderson Group Ltd.
    +$882.0KNewHistory

Largest weight increases

New and added positions, by percentage points of the portfolio gained

  1. WBDWarner Bros. Discovery, Inc.
    +8.13 pp0.0% → 8.1%History
  2. EAElectronic Arts Inc.
    +6.22 pp0.0% → 6.2%History
  3. GTLSChart Industries Inc
    +4.95 pp0.0% → 5.0%History
  4. HOLXHologic Inc
    +4.61 pp0.0% → 4.6%History
  5. JHGJanus Henderson Group Ltd.
    +3.84 pp0.0% → 3.8%History

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. Churchill Capital Corp IX/CaymanG21301109
    −$4.04MSold out
  2. MRLNMerlin, Inc.
    −$1.55MSold outHistory

Largest weight decreases

Reduced and sold-out positions, by percentage points of the portfolio lost

  1. Churchill Capital Corp IX/CaymanG21301109
    −22.49 pp22.5% → 0.0%
  2. MRLNMerlin, Inc.
    −8.61 pp8.6% → 0.0%History

Metrics

13F metrics for Q1 2026, computed only from the numbers in the filings. Definitions below.

Portfolio value
$23.0M
+$4.99M (+27.8%) vs. prior quarter
Positions
21
+15 vs. prior quarter
Top 10 concentration
84.2%
Top 10 as share of value
Turnover
27.3%
Q1 2026, one quarter
Average holding period
2.2 quarters
Weighted by value

How these are calculated

  • Portfolio value: the market value of all long positions in the 13F, as reported at quarter end, excluding options.
  • Top 10 concentration: the combined value of the 10 largest positions as a share of portfolio value.
  • Turnover: the smaller of this quarter's estimated purchases and estimated sales, divided by the average of this and last quarter's portfolio value. Estimates multiply the change in shares by the quarter-end price implied by the filing (market value divided by shares); new positions use this quarter's value and sold-out positions last quarter's. Only positions reported in shares count, and it is not calculated when the previous quarter was not filed.
  • Average holding period: how many consecutive quarters each current position has been held (including this one; a quarter without the position or without a filing starts the count over), weighted by this quarter's value. Counting starts with the first 13F in Livermore (Q1 2021), so positions held before then are understated.

13F filings by quarter

21 quarters, going back to Q1 2021. Bars show each quarter's 13F portfolio value; quarters without a filing are left blank.

Peak $199.7M (Q2 2021)

Q1 2021: $181.9MQ2 2021: $199.7MQ3 2021: $167.3MQ4 2021: $148.5MQ1 2022: $166.8MQ2 2022: $128.9MQ3 2022: $139.3MQ4 2022: $97.2MQ1 2023: $115.0MQ2 2023: $131.0MQ3 2023: $196.6MQ4 2023: $102.0MQ1 2024: $147.3MQ2 2024: $155.0MQ3 2024: $167.2MQ4 2024: $138.2MQ1 2025: $128.7MQ2 2025: $115.9MQ3 2025: $94.0MQ4 2025: $18.0MQ1 2026: $23.0M
Q1 2021Q1 2026
13F filings of BCK Capital Management LP by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q1 2026May 1, 202621$23.0MVLOSCEPOMCGAvs. Q4 2025SEC
Q4 2025Feb 11, 20266$18.0MVLOSChurchill Capital Corp IX/CaymanCEPOvs. Q3 2025SEC
Q3 2025Nov 10, 202586$94.0MSPRKGTLSvs. Q2 2025SEC
Q2 2025Aug 7, 202575$115.9MKJNPRGMSvs. Q1 2025SEC
Q1 2025May 8, 202563$128.7MXKJNPRvs. Q4 2024SEC
Q4 2024Feb 18, 202557$138.2MEDRXKvs. Q3 2024SEC
Q3 2024Nov 7, 202466$167.2MEDRSIRIXvs. Q2 2024SEC
Q2 2024Aug 8, 202476$155.0MEDRLiberty Media CorpXvs. Q1 2024SEC
Q1 2024May 8, 202471$147.3MEVBGXEDRvs. Q4 2023SEC
Q4 2023Feb 6, 202477$102.0MEDRACIPGTIvs. Q3 2023SEC
Q3 2023Nov 8, 202383$196.6MATVIHZNPSGENvs. Q2 2023SEC
Q2 2023Aug 11, 202365$131.0MHZNPSGENATVIvs. Q1 2023SEC
Q1 2023May 12, 202372$115.0MNATIShaw Communications IncTAvs. Q4 2022SEC
Q4 2022Feb 9, 202377$97.2MFHNAJRDTXNMvs. Q3 2022SEC
Q3 2022Nov 8, 202295$139.3MCHNGTWTRYvs. Q2 2022SEC
Q2 2022Aug 8, 202299$128.9MCHNGFHNMNDTvs. Q1 2022SEC
Q1 2022May 5, 2022141$166.8MCERNISBCFHNvs. Q4 2021SEC
Q4 2021Feb 7, 2022122$148.5MINFONUANXLNXvs. Q3 2021SEC
Q3 2021Nov 9, 2021137$167.3MINFONUANMonmouth Real Estate Investment Corpvs. Q2 2021SEC
Q2 2021Jul 20, 2021136$199.7MKSUINFOWORKvs. Q1 2021SEC
Q1 2021May 6, 2021135$181.9MWORKCorelogic IncAegion Corp–SEC