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Harbour Investments, Inc.

SEC CIK
0000810121
Latest filing
Nov 9, 2026

The latest 13F from Harbour Investments, Inc. covers Q3 2026 (filed Nov 9, 2026): 4,630 long positions worth $6.75B. The top 10 holdings make up 19.6% of the portfolio, and the largest is Vanguard S&P 500 ETF at 4.0%. Livermore has 23 filings on Form 13F from this institution, going back to Q1 2021.

What changed in Q3 2026

Full comparison

Share counts compared with Q2 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.

New
241
Est. +$126.7M
Added
1202
Est. +$315.7M
Reduced
2099
Est. −$920.1M
Sold out
378
Est. −$130.0M

Top 5 holdings

Share of this quarter's portfolio value

  1. Vanguard S&P 500 ETF922908363
    4.0%$266.8M
  2. Invesco QQQ Trust Series I46090E103
    3.1%$210.6M
  3. First Tr Exchange Traded FD33741X102
    2.4%$161.6M
  4. AAPLApple Inc.
    1.8%$118.6MHistory
  5. American Centy ETF Tr025072604
    1.7%$118.0M

Share of portfolio

Top 5 holdings and the other 4,625 positions, by share of portfolio value

  1. Vanguard S&P 500 ETF4.0%
  2. Invesco QQQ Trust Series I3.1%
  3. First Tr Exchange Traded FD2.4%
  4. AAPL1.8%
  5. American Centy ETF Tr1.7%
  6. Other 4,625 positions87.0%

Biggest buys

New and added positions, by estimated amount bought

  1. Dfa Invt Dimensions Group IN25239Y196
    +$49.6MNew
  2. DFA US Small Cap Value ETF25239Y170
    +$36.4MNew
  3. Dfa Invt Dimensions Group Inc U.S. SML CP Port25239Y188
    +$19.6MNew
  4. First Tr Exchange-Traded FD33733E690
    +$17.1MAdded
  5. First Tr Exchange-Traded FD33733E641
    +$12.0MAdded

Largest weight increases

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

  1. Dfa Invt Dimensions Group IN25239Y196
    +0.73 pp0.0% → 0.7%
  2. DFA US Small Cap Value ETF25239Y170
    +0.54 pp0.0% → 0.5%
  3. Dfa Invt Dimensions Group Inc U.S. SML CP Port25239Y188
    +0.29 pp0.0% → 0.3%
  4. First Tr Exchange-Traded FD33733E690
    +0.27 pp0.1% → 0.4%
  5. American Centy ETF Tr025072604
    +0.21 pp1.5% → 1.7%

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. Dimensional ETF Trust25434V831
    −$47.6MSold out
  2. Dimensional ETF Trust25434V815
    −$36.1MSold out
  3. iShares Core S&P 500 ETF464287200
    −$35.0MReduced
  4. AAPLApple Inc.
    −$32.4MReducedHistory
  5. Vanguard S&P 500 ETF922908363
    −$24.0MReduced

Largest weight decreases

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

  1. Dimensional ETF Trust25434V831
    −0.64 pp0.6% → 0.0%
  2. Dimensional ETF Trust25434V815
    −0.49 pp0.5% → 0.0%
  3. iShares Core S&P 500 ETF464287200
    −0.35 pp1.3% → 1.0%
  4. CATCaterpillar Inc
    −0.35 pp0.5% → 0.2%History
  5. Dimensional U.S. Small Cap ETF25434V500
    −0.27 pp0.3% → 0.0%

Metrics

13F metrics for Q3 2026, computed only from the numbers in the filings. Definitions below.

Portfolio value
$6.75B
−$676.5M (−9.1%) vs. prior quarter
Positions
4,630
−137 vs. prior quarter
Top 10 concentration
19.6%
Top 10 as share of value
Turnover
6.2%
Q3 2026, one quarter
Average holding period
15.9 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 $7.43B (Q2 2026)

Q1 2021: $2.78BQ2 2021: $3.14BQ3 2021: $3.13BQ4 2021: $1.68BQ2 2022: $1.48BQ3 2022: $1.48BQ4 2022: $1.64BQ1 2023: $1.83BQ2 2023: $2.02BQ3 2023: $1.99BQ4 2023: $2.42BQ1 2024: $2.82BQ2 2024: $2.96BQ3 2024: $3.32BQ4 2024: $3.48BQ1 2025: $3.50BQ2 2025: $3.95BQ3 2025: $4.41BQ4 2025: $4.93BQ1 2026: $6.48BQ2 2026: $7.43BQ3 2026: $6.75B
Q1 2021Q3 2026
13F filings of Harbour Investments, Inc. by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q3 2026Nov 9, 20264,630$6.75BVanguard S&P 500 ETFInvesco QQQ Trust Series IFirst Tr Exchange Traded FDvs. Q2 2026SEC
Q2 2026Aug 12, 20264,767$7.43BVanguard S&P 500 ETFInvesco QQQ Trust Series IFirst Tr Exchange Traded FDvs. Q1 2026SEC
Q1 2026May 15, 20264,672$6.48BVanguard S&P 500 ETFInvesco QQQ Trust Series IFirst Tr Exchange Traded FDvs. Q4 2025SEC
Q4 2025Feb 9, 20263,862$4.93BVanguard S&P 500 ETFInvesco QQQ Trust Series IFirst Tr Exchange Traded FDvs. Q3 2025SEC
Q3 2025Nov 12, 20253,743$4.41BVanguard S&P 500 ETFInvesco QQQ Trust Series IFirst Tr Exchange Traded FDvs. Q2 2025SEC
Q2 2025Jul 28, 20253,604$3.95BVanguard S&P 500 ETFInvesco QQQ Trust Series IFirst Tr Exchange Traded FDvs. Q1 2025SEC
Q1 2025May 8, 20253,554$3.50BVanguard S&P 500 ETFInvesco QQQ Trust Series IFirst Tr Exchng Traded FD VIvs. Q4 2024SEC
Q4 2024Feb 10, 20253,487$3.48BVanguard S&P 500 ETFInvesco QQQ Trust Series IFirst Tr Exchng Traded FD VIvs. Q3 2024SEC
Q3 2024Nov 4, 20243,392$3.32BVanguard S&P 500 ETFInvesco QQQ Trust Series IPacer US Small Cap Cash Cows ETFvs. Q2 2024SEC
Q2 2024Jul 26, 20243,288$2.96BInvesco QQQ Trust Series IVanguard S&P 500 ETFPacer US Small Cap Cash Cows ETFvs. Q1 2024SEC
Q1 2024Jul 22, 20243,212$2.82BVanguard S&P 500 ETFInvesco QQQ Trust Series IPacer US Small Cap Cash Cows ETFvs. Q4 2023SEC
Q4 2023Feb 16, 20243,128$2.42BVanguard S&P 500 ETFInvesco QQQ Trust Series IPacer US Small Cap Cash Cows ETFvs. Q3 2023SEC
Q3 2023Nov 15, 20232,995$1.99BInvesco QQQ Trust Series IVanguard S&P 500 ETFPacer US Small Cap Cash Cows ETFvs. Q2 2023SEC
Q2 2023Aug 15, 20233,025$2.02BInvesco QQQ Trust Series IVanguard S&P 500 ETFiShares Core S&P Small Cap ETFvs. Q1 2023SEC
Q1 2023May 15, 20232,995$1.83BInvesco QQQ Trust Series IVanguard S&P 500 ETFiShares Core S&P Small Cap ETFvs. Q4 2022SEC
Q4 2022Feb 16, 20232,995$1.64BVanguard S&P 500 ETFiShares Core S&P Small Cap ETFInvesco QQQ Trust Series Ivs. Q3 2022SEC
Q3 2022Nov 15, 20222,896$1.48BVanguard S&P 500 ETFInvesco QQQ Trust Series IiShares Core S&P Small Cap ETFvs. Q2 2022SEC
Q2 2022Aug 15, 20222,896$1.48BVanguard S&P 500 ETFInvesco QQQ Trust Series IiShares Core S&P Small Cap ETF–SEC
Q4 2021Feb 16, 20222,721$1.68BVanguard S&P 500 ETFInvesco QQQ Trust Series IAAPLvs. Q3 2021SEC
Q3 2021Nov 15, 20213,955$3.13BiShares Core S&P Mid-Cap ETFiShares Core S&P Small Cap ETFVanguard S&P 500 ETFvs. Q2 2021SEC
Q2 2021Aug 16, 20213,970$3.14BiShares Core S&P Mid-Cap ETFiShares Core S&P Small Cap ETFVanguard S&P 500 ETFvs. Q1 2021SEC
Q1 2021Aug 17, 2021Amended3,808$2.78BiShares Core S&P Mid-Cap ETFiShares Core S&P Small Cap ETFVanguard S&P 500 ETF–SEC