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Livermore
Livermore
ZHEN

Mainstay Capital Management LLC

SEC CIK
0001127612
Latest filing
Aug 12, 2026

The latest 13F from Mainstay Capital Management LLC covers Q2 2026 (filed Aug 12, 2026): 144 long positions worth $1.35B. The top 10 holdings make up 70.4% of the portfolio, and the largest is iShares Tr at 8.7%. 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
15
Est. +$133.7M
Added
46
Est. +$102.0M
Reduced
63
Est. −$253.9M
Sold out
14
Est. −$47.9M

Top 5 holdings

Share of this quarter's portfolio value

  1. iShares Tr46432F388
    8.7%$117.6M
  2. Ea Series Trust02072L607
    8.4%$114.0M
  3. State Street SPDR Portfolio S&P 500 Growth ETF78464A409
    7.6%$102.0M
  4. WisdomTree Tr97717Y568
    7.4%$100.1M
  5. Tidal Trust II88636J600
    7.2%$98.0M

Share of portfolio

Top 5 holdings and the other 139 positions, by share of portfolio value

  1. iShares Tr8.7%
  2. Ea Series Trust8.4%
  3. State Street SPDR Portfolio S&P 500 Growth ETF7.6%
  4. WisdomTree Tr7.4%
  5. Tidal Trust II7.2%
  6. Other 139 positions60.6%

Biggest buys

New and added positions, by estimated amount bought

  1. Harbor ETF Trust41151J505
    +$97.3MNew
  2. iShares Tr46432F388
    +$64.3MAdded
  3. Tidal Trust III45259A845
    +$28.9MNew
  4. Invesco Nasdaq 100 ETF46138G649
    +$28.7MAdded
  5. TSMTaiwan Semiconductor Manufacturing Co Ltd
    +$2.93MAddedHistory

Largest weight increases

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

  1. Harbor ETF Trust41151J505
    +7.20 pp0.0% → 7.2%
  2. iShares Tr46432F388
    +5.78 pp2.9% → 8.7%
  3. Invesco Nasdaq 100 ETF46138G649
    +2.76 pp2.8% → 5.6%
  4. Tidal Trust III45259A845
    +2.14 pp0.0% → 2.1%
  5. First Tr Exchange Traded FD33738R118
    +0.95 pp5.0% → 5.9%

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. IAUiShares Gold Trust
    −$51.5MReducedHistory
  2. Advisors Inner Circle FD III00775Y645
    −$51.0MReduced
  3. Capital Group Dividend Value14020W106
    −$38.1MReduced
  4. SLViShares Silver Trust
    −$26.9MReducedHistory
  5. Invesco Exchange Traded FD T46137V100
    −$25.9MSold out

Largest weight decreases

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

  1. IAUiShares Gold Trust
    −5.61 pp10.1% → 4.5%History
  2. SLViShares Silver Trust
    −4.52 pp10.3% → 5.7%History
  3. Advisors Inner Circle FD III00775Y645
    −2.29 pp8.9% → 6.6%
  4. WisdomTree Tr97717Y568
    −2.23 pp9.6% → 7.4%
  5. Capital Group Dividend Value14020W106
    −2.12 pp6.3% → 4.2%

Metrics

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

Portfolio value
$1.35B
+$54.0M (+4.2%) vs. prior quarter
Positions
144
+1 vs. prior quarter
Top 10 concentration
70.4%
Top 10 as share of value
Turnover
17.8%
Q2 2026, one quarter
Average holding period
7.3 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 $2.03B (Q2 2025)

Q1 2021: $323.3MQ2 2021: $426.1MQ3 2021: $175.0MQ4 2021: $330.6MQ1 2022: $545.7MQ2 2022: $433.9MQ3 2022: $399.5MQ4 2022: $450.2MQ1 2023: $504.9MQ2 2023: $557.9MQ3 2023: $472.9MQ4 2023: $525.9MQ1 2024: $529.1MQ2 2024: $569.6MQ3 2024: $597.4MQ4 2024: $657.6MQ1 2025: $729.5MQ2 2025: $2.03BQ3 2025: $997.6MQ4 2025: $1.31BQ1 2026: $1.30BQ2 2026: $1.35B
Q1 2021Q2 2026
13F filings of Mainstay Capital Management LLC by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Aug 12, 2026144$1.35BiShares TrEa Series TrustState Street SPDR Portfolio S&P 500 Growth ETFvs. Q1 2026SEC
Q1 2026May 12, 2026143$1.30BSLVIAUWisdomTree Trvs. Q4 2025SEC
Q4 2025Jan 27, 2026127$1.31BWisdomTree TrInvesco Exch Traded FD Tr IIIAUvs. Q3 2025SEC
Q3 2025Dec 10, 2025119$997.6MInvesco Exch Traded FD Tr IIFirst Tr Exchange Traded FDState Street SPDR Portfolio S&P 500 Growth ETFvs. Q2 2025SEC
Q2 2025Jul 24, 2025138$2.03BInvesco Exch Traded FD Tr IISPDR Index Shs FDSExchange Traded Concepts Trvs. Q1 2025SEC
Q1 2025May 5, 2025108$729.5MInvesco Exch Traded FD Tr IIExchange Traded Concepts TruAmerican Centy ETF Trvs. Q4 2024SEC
Q4 2024Feb 4, 2025105$657.6MAmerican Centy ETF TrInvesco Exch Traded FD Tr IIState Street SPDR Portfolio S&P 500 Growth ETFvs. Q3 2024SEC
Q3 2024Oct 23, 2024111$597.4MState Street SPDR Portfolio S&P 500 Growth ETFInvesco S&P 500 Quality ETFInvesco Nasdaq 100 ETFvs. Q2 2024SEC
Q2 2024Jul 30, 2024111$569.6MState Street SPDR Portfolio S&P 500 Growth ETFInvesco Nasdaq 100 ETFInvesco S&P 500 Quality ETFvs. Q1 2024SEC
Q1 2024Apr 30, 2024115$529.1MInvesco Nasdaq 100 ETFAmerican Centy ETF TrState Street SPDR Portfolio S&P 500 Growth ETFvs. Q4 2023SEC
Q4 2023Jan 25, 2024111$525.9MInvesco Nasdaq 100 ETFAmerican Centy ETF TrState Street SPDR Portfolio S&P 500 Growth ETFvs. Q3 2023SEC
Q3 2023Oct 26, 202391$472.9MInvesco Nasdaq 100 ETFAmerican Centy ETF TrInvesco Actively Managed Excvs. Q2 2023SEC
Q2 2023Jul 25, 2023104$557.9MInvesco Nasdaq 100 ETFInvesco S&P 500 Quality ETFAmerican Centy ETF Trvs. Q1 2023SEC
Q1 2023May 3, 2023106$504.9MInvesco S&P 500 Quality ETFPacer US Cash Cows 100 ETFPacer FDS Trvs. Q4 2022SEC
Q4 2022Feb 14, 2023109$450.2MInvesco S&P 500 Quality ETFPacer US Cash Cows 100 ETFiShares Trvs. Q3 2022SEC
Q3 2022Nov 15, 202299$399.5MInvesco S&P 500 Quality ETFPacer US Cash Cows 100 ETFState Street SPDR Portfolio S&P 500 Growth ETFvs. Q2 2022SEC
Q2 2022Aug 5, 2022103$433.9MInvesco S&P 500 Quality ETFPacer US Cash Cows 100 ETFState Street SPDR Portfolio S&P 500 Growth ETFvs. Q1 2022SEC
Q1 2022May 10, 2022117$545.7MInvesco S&P 500 Quality ETFPacer US Cash Cows 100 ETFGraniteshares ETF Trvs. Q4 2021SEC
Q4 2021Feb 15, 2022123$330.6MInvesco Exchange Traded FD TState Street SPDR Portfolio S&P 500 Growth ETFDirexion Shs ETF Trvs. Q3 2021SEC
Q3 2021Nov 12, 202199$175.0MInvesco Exchange Traded FD TDirexion Shs ETF TrGraniteshares ETF Trvs. Q2 2021SEC
Q2 2021Aug 6, 2021124$426.1MVanEck Morningstar Wide Moat ETFInvesco Exchange Traded FD TState Street SPDR S&P Regional Banking ETFvs. Q1 2021SEC
Q1 2021May 13, 2021124$323.3MCambria ETF TrState Street SPDR S&P Regional Banking ETFARK ETF Tr–SEC