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Livermore
Livermore
ZHEN

Stonebridge Capital Management Inc

SEC CIK
0000051812
Latest filing
Aug 14, 2026

The latest 13F from Stonebridge Capital Management Inc covers Q2 2026 (filed Aug 14, 2026): 70 long positions worth $207.6M. The top 10 holdings make up 52.3% of the portfolio, and the largest is Genuine Parts Co (GPC) at 9.1%. Livermore has 20 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
9
Est. +$23.3M
Added
7
Est. +$1.95M
Reduced
40
Est. −$33.9M
Sold out
19
Est. −$40.2M

Top 5 holdings

Share of this quarter's portfolio value

  1. GPCGenuine Parts Co
    9.1%$18.9MHistory
  2. AAPLApple Inc.
    8.2%$17.0MHistory
  3. MSFTMicrosoft Corp
    6.9%$14.4MHistory
  4. INTCIntel Corp
    6.8%$14.2MHistory
  5. CATCaterpillar Inc
    4.0%$8.36MHistory

Share of portfolio

Top 5 holdings and the other 65 positions, by share of portfolio value

  1. GPC9.1%
  2. AAPL8.2%
  3. MSFT6.9%
  4. INTC6.8%
  5. CAT4.0%
  6. Other 65 positions64.9%

Biggest buys

New and added positions, by estimated amount bought

  1. GPCGenuine Parts Co
    +$18.9MNewHistory
  2. State Street Technology Select Sector SPDR ETF81369Y803
    +$1.26MNew
  3. SPYSPDR S&P 500 ETF Trust
    +$956.9KNewHistory
  4. AMGNAmgen Inc
    +$905.3KAddedHistory
  5. iShares Tr464287556
    +$847.3KNew

Largest weight increases

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

  1. GPCGenuine Parts Co
    +9.09 pp0.0% → 9.1%History
  2. State Street Technology Select Sector SPDR ETF81369Y803
    +0.61 pp0.0% → 0.6%
  3. GOOGLAlphabet Inc.
    +0.54 pp1.4% → 1.9%History
  4. AMGNAmgen Inc
    +0.47 pp0.4% → 0.8%History
  5. SPYSPDR S&P 500 ETF Trust
    +0.46 pp0.0% → 0.5%History

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. Schwab808515605
    −$21.9MSold out
  2. Primecap Odyssey Funds Growth74160Q103
    −$9.12MSold out
  3. AAPLApple Inc.
    −$3.49MReducedHistory
  4. INTCIntel Corp
    −$3.32MReducedHistory
  5. MUMicron Technology Inc
    −$2.89MReducedHistory

Largest weight decreases

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

  1. Schwab808515605
    −9.97 pp10.0% → 0.0%
  2. Primecap Odyssey Funds Growth74160Q103
    −4.15 pp4.1% → 0.0%
  3. Nestle SA ADR641069406
    −0.99 pp1.0% → 0.0%
  4. DISWalt Disney Co
    −0.93 pp0.9% → 0.0%History
  5. INTUIntuit Inc.
    −0.69 pp1.9% → 1.2%History

Metrics

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

Portfolio value
$207.6M
−$12.3M (−5.6%) vs. prior quarter
Positions
70
−10 vs. prior quarter
Top 10 concentration
52.3%
Top 10 as share of value
Turnover
11.8%
Q2 2026, one quarter
Average holding period
1.9 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

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

Peak $287.4M (Q4 2021)

Q1 2021: $262.1MQ2 2021: $275.1MQ3 2021: $272.5MQ4 2021: $287.4MQ1 2022: $277.2MQ2 2022: $219.3MQ3 2022: $193.5MQ4 2022: $209.3MQ1 2023: $208.1MQ2 2023: $214.7MQ3 2023: $183.1MQ4 2023: $205.0MQ1 2024: $223.7MQ2 2024: $234.4MQ3 2024: $251.9MQ4 2024: $244.2MQ1 2025: $231.3MQ2 2025: $255.7MQ1 2026: $219.9MQ2 2026: $207.6M
Q1 2021Q2 2026
13F filings of Stonebridge Capital Management Inc by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Aug 14, 202670$207.6MGPCAAPLMSFTvs. Q1 2026SEC
Q1 2026Apr 14, 202680$219.9MSchwabAAPLMSFT–SEC
Q2 2025Jul 1, 202586$255.7MMSFTSchwabAAPLvs. Q1 2025SEC
Q1 2025May 12, 202585$231.3MSchwabAAPLMSFTvs. Q4 2024SEC
Q4 2024Jan 14, 202579$244.2MAAPLMSFTSchwabvs. Q3 2024SEC
Q3 2024Oct 7, 202483$251.9MMSFTAAPLSchwabvs. Q2 2024SEC
Q2 2024Jul 9, 202483$234.4MMSFTAAPLSchwabvs. Q1 2024SEC
Q1 2024Apr 15, 202483$223.7MMSFTAAPLORCLvs. Q4 2023SEC
Q4 2023Mar 5, 202477$205.0MAAPLMSFTPrimecap Odyssey Funds Growthvs. Q3 2023SEC
Q3 2023Dec 13, 202374$183.1MAAPLMSFTORCLvs. Q2 2023SEC
Q2 2023Jul 6, 202387$214.7MAAPLMSFTORCLvs. Q1 2023SEC
Q1 2023Apr 4, 202388$208.1MAAPLMSFTPrimecap Odyssey Funds Growthvs. Q4 2022SEC
Q4 2022Jan 6, 202390$209.3MMSFTAAPLPEPvs. Q3 2022SEC
Q3 2022Oct 6, 202292$193.5MAAPLMSFTPEPvs. Q2 2022SEC
Q2 2022Jul 1, 202297$219.3MMSFTAAPLPEPvs. Q1 2022SEC
Q1 2022Apr 4, 202299$277.2MAAPLMSFTPrimecap Odyssey Funds Growthvs. Q4 2021SEC
Q4 2021Jan 5, 2022100$287.4MAAPLMSFTPrimecap Odyssey Funds Growthvs. Q3 2021SEC
Q3 2021Oct 7, 2021101$272.5MMSFTAAPLPrimecap Odyssey Funds Growthvs. Q2 2021SEC
Q2 2021Jul 6, 2021102$275.1MMSFTAAPLPrimecap Odyssey Funds Growthvs. Q1 2021SEC
Q1 2021Apr 5, 2021101$262.1MAAPLMSFTPrimecap Odyssey Funds Growth–SEC