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Livermore
Livermore
ZHEN

Harbor Advisors LLC

SEC CIK
0001687156
Latest filing
Jul 28, 2026

The latest 13F from Harbor Advisors LLC covers Q2 2026 (filed Jul 28, 2026): 194 long positions worth $795.1M. The top 10 holdings make up 67.8% of the portfolio, and the largest is Equinix Inc (EQIX) at 31.4%. Livermore has 23 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
10
Est. +$2.82M
Added
7
Est. +$3.54M
Reduced
4
Est. −$2.13M
Sold out
13
Est. −$5.78M

Top 5 holdings

Share of this quarter's portfolio value

  1. EQIXEquinix Inc
    31.4%$249.4MHistory
  2. MUMicron Technology Inc
    7.3%$57.7MHistory
  3. GOOGLAlphabet Inc.
    6.5%$52.0MHistory
  4. AAPLApple Inc.
    5.4%$42.9MHistory
  5. AMZNAmazon Com Inc
    4.6%$36.5MHistory

Biggest buys

New and added positions, by estimated amount bought

  1. DVNDevon Energy Corp
    +$1.74MAddedHistory
  2. DLRDigital Realty Trust, Inc.
    +$897.9KAddedHistory
  3. MCDMcDonalds Corp
    +$540.6KNewHistory
  4. TRLVTrulieve Cannabis Corp.
    +$484.2KNewHistory
  5. TCBXThird Coast Bancshares, Inc.
    +$404.0KNewHistory

Largest weight increases

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

  1. DVNDevon Energy Corp
    +0.20 pp0.1% → 0.3%History
  2. MCDMcDonalds Corp
    +0.07 pp0.0% → 0.1%History
  3. TRLVTrulieve Cannabis Corp.
    +0.06 pp0.0% → 0.1%History
  4. TCBXThird Coast Bancshares, Inc.
    +0.05 pp0.0% → 0.1%History
  5. NOWServiceNow, Inc.
    +0.04 pp0.0% → <0.1%History

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. CTRACoterra Energy Inc.
    −$2.11MSold outHistory
  2. XOMExxonMobil Holdings Corp
    −$1.37MSold outHistory
  3. MUMicron Technology Inc
    −$1.15MReducedHistory
  4. CIFRCipher Digital Inc.
    −$490.0KReducedHistory
  5. CNCCentene Corp
    −$320.9KReducedHistory

Largest weight decreases

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

  1. CTRACoterra Energy Inc.
    −0.30 pp0.3% → 0.0%History
  2. XOMExxonMobil Holdings Corp
    −0.20 pp0.2% → 0.0%History
  3. LBTYKLiberty Global Ltd.
    −0.04 pp<0.1% → 0.0%History
  4. VSNTVersant Media Group, Inc.
    −0.04 pp<0.1% → 0.0%History
  5. HCAHCA Healthcare, Inc.
    −0.03 pp<0.1% → 0.0%History

Metrics

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

Portfolio value
$795.1M
+$102.9M (+14.9%) vs. prior quarter
Positions
194
−3 vs. prior quarter
Top 10 concentration
67.8%
Top 10 as share of value
Turnover
0.9%
Q2 2026, one quarter
Average holding period
20.5 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

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

Peak $795.1M (Q2 2026)

Q1 2021: $451.1MQ2 2021: $505.6MQ3 2021: $499.9MQ4 2021: $537.7MQ1 2022: $487.7MQ2 2022: $411.9MQ3 2022: $371.7MQ4 2022: $400.6MQ1 2023: $427.4MQ2 2023: $470.5MQ3 2023: $466.8MQ4 2023: $523.0MQ1 2024: $544.4MQ2 2024: $545.4MQ3 2024: $597.5MQ4 2024: $636.5MQ1 2025: $576.0MQ2 2025: $611.0MQ3 2025: $648.4MQ4 2025: $665.8MQ1 2026: $692.2MQ2 2026: $795.1M
Q1 2021Q2 2026
13F filings of Harbor Advisors LLC by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Jul 28, 2026194$795.1MEQIXMUGOOGLvs. Q1 2026SEC
Q1 2026May 7, 2026197$692.2MEQIXGOOGLAAPLvs. Q4 2025SEC
Q4 2025Jan 30, 2026193$665.8MEQIXGOOGLAAPLvs. Q3 2025SEC
Q3 2025Nov 12, 2025190$648.4MEQIXGOOGLAAPLvs. Q2 2025SEC
Q2 2025Aug 13, 2025190$611.0MEQIXAMZNAAPLvs. Q1 2025SEC
Q1 2025May 15, 2025193$576.0MEQIXAAPLAMZNvs. Q4 2024SEC
Q4 2024Feb 11, 2025192$636.5MEQIXAAPLAMZNvs. Q3 2024SEC
Q3 2024Nov 14, 2024188$597.5MEQIXAAPLAMZNvs. Q2 2024SEC
Q2 2024Jul 30, 2024178$545.4MEQIXAAPLAMZNvs. Q1 2024SEC
Q1 2024May 1, 2024176$544.4MEQIXAMZNAAPLvs. Q4 2023SEC
Q4 2023Feb 1, 2024175$523.0MEQIXAAPLAMZNvs. Q3 2023SEC
Q3 2023Nov 7, 2023165$466.8MEQIXAAPLGOOGLvs. Q2 2023SEC
Q2 2023Aug 15, 2023Amended154$470.5MEQIXAAPLAMZNvs. Q1 2023SEC
Q1 2023May 11, 2023150$427.4MEQIXAAPLGOOGLvs. Q4 2022SEC
Q4 2022Feb 13, 2023163$400.6MEQIXAAPLGOOGLvs. Q3 2022SEC
Q3 2022Nov 7, 2022167$371.7MEQIXAAPLAMZNvs. Q2 2022SEC
Q2 2022Aug 5, 2022176$411.9MEQIXAAPLGOOGLvs. Q1 2022SEC
Q1 2022May 16, 2022182$487.7MEQIXAAPLAMZNvs. Q4 2021SEC
Q4 2021Feb 14, 2022185$537.7MEQIXAAPLAMZNvs. Q3 2021SEC
Q3 2021Oct 29, 2021183$499.9MEQIXAMZNAAPLvs. Q2 2021SEC
Q2 2021Aug 3, 2021187$505.6MEQIXAMZNAAPLvs. Q1 2021SEC
Q1 2021May 4, 2021199$451.1MEQIXAMZNAAPL–SEC