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Livermore
Livermore
ZHEN

Harbor Capital Advisors, Inc.

SEC CIK
0001039128
Latest filing
Aug 7, 2026

The latest 13F from Harbor Capital Advisors, Inc. covers Q2 2026 (filed Aug 7, 2026): 1,213 long positions worth $1.47B. The top 10 holdings make up 16.2% of the portfolio, and the largest is iShares Core MSCI Emerging Markets ETF at 2.5%. Livermore has 19 filings on Form 13F from this institution, going back to Q4 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
57
Est. +$45.9M
Added
435
Est. +$116.8M
Reduced
538
Est. −$121.2M
Sold out
55
Est. −$20.9M

Top 5 holdings

Share of this quarter's portfolio value

  1. iShares Core MSCI Emerging Markets ETF46434G103
    2.5%$36.2M
  2. State Street SPDR Portfolio S&P 500 ETF78464A854
    1.9%$27.4M
  3. AMZNAmazon Com Inc
    1.8%$26.7MHistory
  4. GOOGLAlphabet Inc.
    1.8%$26.4MHistory
  5. AAPLApple Inc.
    1.7%$25.3MHistory

Share of portfolio

Top 5 holdings and the other 1,208 positions, by share of portfolio value

  1. iShares Core MSCI Emerging Markets ETF2.5%
  2. State Street SPDR Portfolio S&P 500 ETF1.9%
  3. AMZN1.8%
  4. GOOGL1.8%
  5. AAPL1.7%
  6. Other 1,208 positions90.3%

Biggest buys

New and added positions, by estimated amount bought

  1. State Street SPDR Portfolio S&P 500 ETF78464A854
    +$17.7MAdded
  2. iShares Tr46435G268
    +$13.5MAdded
  3. iShares Broad Usd Investment Grade Corporate Bond ETF464288620
    +$9.60MAdded
  4. Vanguard Intl Equity Index F922042874
    +$7.34MNew
  5. iShares Tr464287432
    +$3.49MNew

Largest weight increases

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

  1. State Street SPDR Portfolio S&P 500 ETF78464A854
    +1.18 pp0.7% → 1.9%
  2. iShares Tr46435G268
    +0.92 pp<0.1% → 0.9%
  3. iShares Broad Usd Investment Grade Corporate Bond ETF464288620
    +0.65 pp<0.1% → 0.7%
  4. Vanguard Intl Equity Index F922042874
    +0.50 pp0.0% → 0.5%
  5. MRVLMarvell Technology, Inc.
    +0.36 pp0.2% → 0.6%History

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. iShares MSCI USA Min Vol Factor ETF46429B697
    −$14.5MReduced
  2. APPSDigital Turbine, Inc.
    −$7.57MReducedHistory
  3. State Street Technology Select Sector SPDR ETF81369Y803
    −$7.03MReduced
  4. SIMOSilicon Motion Technology CORP
    −$7.01MReducedHistory
  5. State Street Consumer Staples Select Sector SPDR ETF81369Y308
    −$4.83MReduced

Largest weight decreases

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

  1. iShares MSCI USA Min Vol Factor ETF46429B697
    −1.20 pp1.2% → <0.1%
  2. State Street Consumer Staples Select Sector SPDR ETF81369Y308
    −0.48 pp1.0% → 0.5%
  3. State Street Communication Services Select Sector SPDR ETF81369Y852
    −0.36 pp0.8% → 0.5%
  4. VRRMVerra Mobility Corp
    −0.29 pp0.3% → <0.1%History
  5. State Street Technology Select Sector SPDR ETF81369Y803
    −0.29 pp0.9% → 0.6%

Metrics

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

Portfolio value
$1.47B
+$231.9M (+18.8%) vs. prior quarter
Positions
1,213
+2 vs. prior quarter
Top 10 concentration
16.2%
Top 10 as share of value
Turnover
10.5%
Q2 2026, one quarter
Average holding period
8.6 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 (Q4 2021), so positions held before then are understated.

13F filings by quarter

19 quarters, going back to Q4 2021. Bars show each quarter's 13F portfolio value; quarters without a filing are left blank.

Peak $2.38B (Q2 2025)

Q4 2021: $274.7MQ1 2022: $212.2MQ2 2022: $131.4MQ3 2022: $107.4MQ4 2022: $100.8MQ1 2023: $346.7MQ2 2023: $500.0MQ3 2023: $464.3MQ4 2023: $515.0MQ1 2024: $765.3MQ2 2024: $1.31BQ3 2024: $2.30BQ4 2024: $2.29BQ1 2025: $2.19BQ2 2025: $2.38BQ3 2025: $1.29BQ4 2025: $1.29BQ1 2026: $1.23BQ2 2026: $1.47B
Q4 2021Q2 2026
13F filings of Harbor Capital Advisors, Inc. by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Aug 7, 20261,213$1.47BiShares Core MSCI Emerging Markets ETFState Street SPDR Portfolio S&P 500 ETFAMZNvs. Q1 2026SEC
Q1 2026Apr 28, 20261,211$1.23BiShares Core MSCI Emerging Markets ETFAMZNAAPLvs. Q4 2025SEC
Q4 2025Jan 20, 20261,323$1.29BiShares Core MSCI Emerging Markets ETFGOOGLState Street SPDR Portfolio S&P 500 ETFvs. Q3 2025SEC
Q3 2025Oct 15, 20251,339$1.29BiShares Core S&P 500 ETFiShares TriShares MSCI Eafe ETFvs. Q2 2025SEC
Q2 2025Jul 9, 20251,387$2.38BiShares Core S&P 500 ETFSNEXRDNTvs. Q1 2025SEC
Q1 2025Apr 14, 20251,407$2.19BSNEXiShares Core S&P 500 ETFSFMvs. Q4 2024SEC
Q4 2024Jan 10, 20251,319$2.29BSNEXNVDARDNTvs. Q3 2024SEC
Q3 2024Oct 29, 20241,339$2.30BNVDARDNTSNEXvs. Q2 2024SEC
Q2 2024Jul 9, 2024724$1.31BNVDAAMZNMSFTvs. Q1 2024SEC
Q1 2024May 13, 2024744$765.3MNVDAMSFTAMZNvs. Q4 2023SEC
Q4 2023Jan 8, 2024438$515.0MMSFTState Street Consumer Discretionary Select Sector SPDR ETFAAPLvs. Q3 2023SEC
Q3 2023Oct 20, 2023444$464.3MMSFTState Street Consumer Discretionary Select Sector SPDR ETFAAPLvs. Q2 2023SEC
Q2 2023Jul 11, 2023661$500.0MMSFTState Street Consumer Discretionary Select Sector SPDR ETFAAPLvs. Q1 2023SEC
Q1 2023Apr 26, 2023246$346.7MMSFTState Street Consumer Discretionary Select Sector SPDR ETFAAPLvs. Q4 2022SEC
Q4 2022Jan 20, 2023159$100.8MWDAYLRCXNOWvs. Q3 2022SEC
Q3 2022Oct 28, 2022157$107.4MAMZNLRCXTSLAvs. Q2 2022SEC
Q2 2022Jul 26, 2022160$131.4MNOWLRCXMSFTvs. Q1 2022SEC
Q1 2022Apr 28, 2022160$212.2MAMZNMSFTMCHPvs. Q4 2021SEC
Q4 2021Feb 4, 202292$274.7MMSFTLRCXTSLA–SEC