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Livermore
Livermore
ZHEN

Bluefin Capital Management, LLC

SEC CIK
0001144208
Latest filing
Aug 14, 2026

The latest 13F from Bluefin Capital Management, LLC covers Q2 2026 (filed Aug 14, 2026): 91 long positions worth $347.0M. The top 10 holdings make up 73.0% of the portfolio, and the largest is Microsoft Corp (MSFT) at 21.6%. Livermore has 24 filings on Form 13F from this institution, going back to Q1 2021.

What changed in Q2 2026

Share counts compared with Q1 2026: 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
49
Est. +$165.0M
Added
14
Est. +$107.1M
Reduced
15
Est. −$23.7M
Sold out
34
Est. −$15.9M

Top 5 holdings

Share of this quarter's portfolio value

  1. MSFTMicrosoft Corp
    21.6%$74.8MHistory
  2. NVDANVIDIA Corp
    11.5%$40.0MHistory
  3. Entrepreneurshares Series Tr293828877
    9.1%$31.6M
  4. AMDAdvanced Micro Devices Inc
    8.5%$29.5MHistory
  5. SPYSPDR S&P 500 ETF Trust
    6.6%$22.9MHistory

Share of portfolio

Top 5 holdings and the other 86 positions, by share of portfolio value

  1. MSFT21.6%
  2. NVDA11.5%
  3. Entrepreneurshares Series Tr9.1%
  4. AMD8.5%
  5. SPY6.6%
  6. Other 86 positions42.7%

Biggest buys

New and added positions, by estimated amount bought

  1. MSFTMicrosoft Corp
    +$74.6MAddedHistory
  2. NVDANVIDIA Corp
    +$40.0MNewHistory
  3. Entrepreneurshares Series Tr293828877
    +$31.6MNew
  4. AMDAdvanced Micro Devices Inc
    +$29.5MNewHistory
  5. SPYSPDR S&P 500 ETF Trust
    +$14.6MAddedHistory

Largest weight increases

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

  1. MSFTMicrosoft Corp
    +21.32 pp0.2% → 21.6%History
  2. NVDANVIDIA Corp
    +11.53 pp0.0% → 11.5%History
  3. Entrepreneurshares Series Tr293828877
    +9.11 pp0.0% → 9.1%
  4. AMDAdvanced Micro Devices Inc
    +8.50 pp0.0% → 8.5%History
  5. BLDQXO Insulation, LLC
    +3.68 pp0.0% → 3.7%History

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. State Street SPDR Bloomberg Convertible Securities ETF78464A359
    −$8.94MReduced
  2. CRWVCoreWeave, Inc.
    −$8.54MReducedHistory
  3. CCOICogent Communications Holdings, Inc.
    −$2.49MSold outHistory
  4. CRCCalifornia Resources Corp
    −$1.61MSold outHistory
  5. iShares Tr464288687
    −$1.49MSold out

Largest weight decreases

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

  1. CRWVCoreWeave, Inc.
    −15.23 pp20.7% → 5.4%History
  2. State Street SPDR Bloomberg Convertible Securities ETF78464A359
    −8.61 pp9.3% → 0.7%
  3. Ea Series Trust02072L565
    −7.44 pp10.1% → 2.7%
  4. CCOICogent Communications Holdings, Inc.
    −2.42 pp2.4% → 0.0%History
  5. UTFCohen & Steers Infrastructure Fund Inc
    −1.91 pp2.3% → 0.4%History

Metrics

13F metrics for Q2 2026, computed only from the numbers in the filings. Definitions below.

Portfolio value
$347.0M
+$243.8M (+236.3%) vs. prior quarter
Positions
91
+15 vs. prior quarter
Top 10 concentration
73.0%
Top 10 as share of value
Turnover
17.6%
Q2 2026, one quarter
Average holding period
2.1 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 $1.88B (Q1 2021)

Q1 2021: $1.88BQ2 2021: $1.44BQ3 2021: $865.3MQ4 2021: $1.26BQ1 2022: $575.4MQ2 2022: $728.6MQ3 2022: $917.7MQ4 2022: $567.3MQ1 2023: $709.6MQ2 2023: $441.8MQ3 2023: $1.14BQ4 2023: $1.13BQ1 2024: $619.8MQ2 2024: $371.8MQ3 2024: $247.2MQ1 2025: $124.5MQ2 2025: $129.4MQ3 2025: $231.7MQ4 2025: $356.1MQ1 2026: $103.2MQ2 2026: $347.0M
Q1 2021Q2 2026
13F filings of Bluefin Capital Management, LLC by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Aug 14, 202691$347.0MMSFTNVDAEntrepreneurshares Series Trvs. Q1 2026SEC
Q1 2026May 15, 202676$103.2MCRWVEa Series TrustState Street SPDR Bloomberg Convertible Securities ETFvs. Q4 2025SEC
Q4 2025Apr 29, 2026129$356.1MCRWVSPYCMGvs. Q3 2025SEC
Q3 2025Apr 29, 202654$231.7MCRWVChart Inds IncInvesco QQQ Trust Series Ivs. Q2 2025SEC
Q2 2025Aug 14, 2025104$129.4MiShares TrUNHCRWVvs. Q1 2025SEC
Q1 2025May 21, 202577$124.5MCEFiShares Russell 2000 ETFSPY–SEC
Q3 2024Nov 14, 202481$247.2MChesapeake Energy CorpInsight Enterprises IncCEFvs. Q2 2024SEC
Q2 2024Sep 10, 202470$371.8MChesapeake Energy CorpChesapeake Energy CorpNVDAvs. Q1 2024SEC
Q1 2024May 20, 2024Amended97$619.8MPalo Alto Networks IncChesapeake Energy CorpChesapeake Energy Corpvs. Q4 2023SEC
Q4 2023Feb 16, 2024120$1.13BMSFTGOOGChesapeake Energy Corpvs. Q3 2023SEC
Q3 2023Nov 14, 202387$1.14BiShares TrMSFTChesapeake Energy Corpvs. Q2 2023SEC
Q2 2023Sep 11, 2023Amended79$441.8MChesapeake Energy CorpChesapeake Energy CorpCoherent Corp.vs. Q1 2023SEC
Q1 2023May 15, 2023126$709.6MiShares TrChesapeake Energy CorpChesapeake Energy Corpvs. Q4 2022SEC
Q4 2022Feb 14, 2023201$567.3MChesapeake Energy CorpChesapeake Energy Corp1Life Healthcare Incvs. Q3 2022SEC
Q3 2022Nov 14, 2022265$917.7MChesapeake Energy CorpChesapeake Energy CorpNFLXvs. Q2 2022SEC
Q2 2022Aug 15, 2022306$728.6MVonage Hldgs CorpSailpoint Technologies HldgsPioneer Nat Res Covs. Q1 2022SEC
Q1 2022May 16, 2022342$575.4MAvantor, Inc.BACSPYvs. Q4 2021SEC
Q4 2021Feb 14, 2022556$1.26BNuance Communications, Inc.Nuance Communications, Inc.Teradyne, Incvs. Q3 2021SEC
Q3 2021Nov 15, 2021377$865.3MMacquarie Infrastructure CorNuance Communications, Inc.Sea Ltdvs. Q2 2021SEC
Q2 2021Aug 18, 2021Amended347$1.44BRHZillow Group, Inc.J2 Global Incvs. Q1 2021SEC
Q1 2021May 17, 2021425$1.88BTesla, Inc.Tesla, Inc.Nice Sys Inc–SEC

13D and 13G filings

Companies where Bluefin Capital Management, LLC reports owning 5% or more on Schedule 13D or 13G, and its latest filings.

Current stakes of 5% or more

Bluefin Capital Management, LLC does not currently report owning 5% or more of any company.

Latest filings

2 filings on file made by Bluefin Capital Management, LLC or listing it as a reporting person, newest first.

Schedule 13D and 13G filings by Bluefin Capital Management, LLC
CompanyFiled (ET)FormStakeChangeEvent dateFiling
XUnited States Steel CorpJan 30, 20255:07 PM ET13G/A4.60%10.3M shares−5.70 ppfrom 10.30%Below 5%Jan 21, 2025SEC
XUnited States Steel CorpJan 29, 20259:31 PM ET13G10.30%23.3M sharesNewJan 16, 2025SEC