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Livermore
Livermore
ZHEN

Tamar Securities, LLC

SEC CIK
0001703081
Latest filing
Aug 5, 2026

The latest 13F from Tamar Securities, LLC covers Q2 2026 (filed Aug 5, 2026): 90 long positions worth $1.07B. The top 10 holdings make up 41.4% of the portfolio, and the largest is Alphabet Inc. (GOOG) at 5.5%. Livermore has 22 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
12
Est. +$25.5M
Added
53
Est. +$83.3M
Reduced
22
Est. −$57.1M
Sold out
2
Est. −$48.5K

Top 5 holdings

Share of this quarter's portfolio value

  1. GOOGAlphabet Inc.
    5.5%$59.4MHistory
  2. IBOCInternational Bancshares Corp
    5.1%$54.8MHistory
  3. AMZNAmazon Com Inc
    4.7%$49.9MHistory
  4. AAPLApple Inc.
    4.5%$48.0MHistory
  5. ASMLASML Holding NV
    4.4%$47.1MHistory

Share of portfolio

Top 5 holdings and the other 85 positions, by share of portfolio value

  1. GOOG5.5%
  2. IBOC5.1%
  3. AMZN4.7%
  4. AAPL4.5%
  5. ASML4.4%
  6. Other 85 positions75.8%

Biggest buys

New and added positions, by estimated amount bought

  1. LLYEli Lilly & Co
    +$21.9MNewHistory
  2. NVDANVIDIA Corp
    +$18.3MAddedHistory
  3. AAPLApple Inc.
    +$8.34MAddedHistory
  4. NEMNEWMONT Corp
    +$6.18MAddedHistory
  5. State Street Health Care Select Sector SPDR ETF81369Y209
    +$6.04MAdded

Largest weight increases

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

  1. LLYEli Lilly & Co
    +2.05 pp0.0% → 2.0%History
  2. NVDANVIDIA Corp
    +1.71 pp2.2% → 3.9%History
  3. AAPLApple Inc.
    +0.76 pp3.7% → 4.5%History
  4. State Street Health Care Select Sector SPDR ETF81369Y209
    +0.46 pp1.8% → 2.3%
  5. VSTVistra Corp.
    +0.43 pp1.6% → 2.0%History

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. METAMeta Platforms, Inc.
    −$8.85MReducedHistory
  2. AMZNAmazon Com Inc
    −$7.24MReducedHistory
  3. SNPSSynopsys Inc
    −$5.88MReducedHistory
  4. GOOGAlphabet Inc.
    −$5.75MReducedHistory
  5. AMGNAmgen Inc
    −$5.61MReducedHistory

Largest weight decreases

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

  1. METAMeta Platforms, Inc.
    −1.46 pp4.5% → 3.0%History
  2. AMGNAmgen Inc
    −0.85 pp3.2% → 2.3%History
  3. AMZNAmazon Com Inc
    −0.69 pp5.4% → 4.7%History
  4. SNPSSynopsys Inc
    −0.60 pp2.9% → 2.3%History
  5. RTXRTX Corp
    −0.54 pp2.8% → 2.2%History

Metrics

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

Portfolio value
$1.07B
+$137.2M (+14.7%) vs. prior quarter
Positions
90
+10 vs. prior quarter
Top 10 concentration
41.4%
Top 10 as share of value
Turnover
5.7%
Q2 2026, one quarter
Average holding period
17.6 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 $1.07B (Q2 2026)

Q1 2021: $258.6MQ2 2021: $259.8MQ3 2021: $276.8MQ4 2021: $339.4MQ1 2022: $358.3MQ2 2022: $304.6MQ3 2022: $312.6MQ4 2022: $315.2MQ1 2023: $347.8MQ2 2023: $406.6MQ3 2023: $414.4MQ4 2023: $509.2MQ1 2024: $591.2MQ2 2024: $616.7MQ3 2024: $711.3MQ4 2024: $724.3MQ1 2025: $737.1MQ2 2025: $823.1MQ3 2025: $878.4MQ4 2025: $945.2MQ1 2026: $932.4MQ2 2026: $1.07B
Q1 2021Q2 2026
13F filings of Tamar Securities, LLC by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Aug 5, 202690$1.07BGOOGIBOCAMZNvs. Q1 2026SEC
Q1 2026May 14, 202680$932.4MGOOGIBOCAMZNvs. Q4 2025SEC
Q4 2025Feb 13, 202683$945.2MGOOGIBOCAMZNvs. Q3 2025SEC
Q3 2025Nov 14, 202580$878.4MGOOGIBOCMSFTvs. Q2 2025SEC
Q2 2025Aug 11, 202573$823.1MIBOCMSFTAMZNvs. Q1 2025SEC
Q1 2025May 15, 202572$737.1MIBOCAMZNGOOGvs. Q4 2024SEC
Q4 2024Jan 22, 202569$724.3MGOOGAMZNIBOCvs. Q3 2024SEC
Q3 2024Oct 16, 202470$711.3MGOOGIBOCMSFTvs. Q2 2024SEC
Q2 2024Oct 10, 202468$616.7MGOOGIBOCAMZNvs. Q1 2024SEC
Q1 2024May 13, 202468$591.2MGOOGIBOCMSFTvs. Q4 2023SEC
Q4 2023Jan 25, 202461$509.2MIBOCGOOGMSFTvs. Q3 2023SEC
Q3 2023Nov 14, 202363$414.4MIBOCGOOGMSFTvs. Q2 2023SEC
Q2 2023Oct 10, 202461$406.6MIBOCMSFTAMZNvs. Q1 2023SEC
Q1 2023Oct 10, 202460$347.8MIBOCMSFTGOOGvs. Q4 2022SEC
Q4 2022Feb 10, 202355$315.2MIBOCMSFTAAPLvs. Q3 2022SEC
Q3 2022Nov 7, 202252$312.6MIBOCMSFTGOOGvs. Q2 2022SEC
Q2 2022Aug 5, 202254$304.6MIBOCMSFTAAPLvs. Q1 2022SEC
Q1 2022Apr 27, 202261$358.3MIBOCMSFTAAPLvs. Q4 2021SEC
Q4 2021Feb 14, 202260$339.4MIBOCAAPLMSFTvs. Q3 2021SEC
Q3 2021Oct 19, 202152$276.8MIBOCAAPLAMZNvs. Q2 2021SEC
Q2 2021Aug 6, 202152$259.8MIBOCMSFTAAPLvs. Q1 2021SEC
Q1 2021May 11, 202155$258.6MIBOCAAPLMSFT–SEC