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Livermore
Livermore
ZHEN

Osterweis Capital Management Inc

SEC CIK
0001007524
Latest filing
Aug 14, 2026

The latest 13F from Osterweis Capital Management Inc covers Q2 2026 (filed Aug 14, 2026): 231 long positions worth $2.12B. The top 10 holdings make up 29.7% of the portfolio, and the largest is Alphabet Inc. (GOOG) at 5.4%. Livermore has 24 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
18
Est. +$143.4M
Added
25
Est. +$172.2M
Reduced
84
Est. −$259.5M
Sold out
16
Est. −$182.3M

Top 5 holdings

Share of this quarter's portfolio value

  1. GOOGAlphabet Inc.
    5.4%$113.8MHistory
  2. AAPLApple Inc.
    3.3%$69.4MHistory
  3. Marriott Vacations Worldwide Corp57164YAF4
    2.9%$62.2M
  4. AMZNAmazon Com Inc
    2.8%$60.2MHistory
  5. AMATApplied Materials Inc
    2.8%$58.8MHistory

Share of portfolio

Top 5 holdings and the other 226 positions, by share of portfolio value

  1. GOOG5.4%
  2. AAPL3.3%
  3. Marriott Vacations Worldwide Corp2.9%
  4. AMZN2.8%
  5. AMAT2.8%
  6. Other 226 positions82.8%

Biggest buys

New and added positions, by estimated amount bought

  1. AAPLApple Inc.
    +$56.2MAddedHistory
  2. Redfin Corp75737FAE8
    +$34.1MNew
  3. AJGArthur J. Gallagher & Co.
    +$21.1MNewHistory
  4. BROSDutch Bros Inc.
    +$14.5MNewHistory
  5. Workiva Inc98139AAB1
    +$13.4MNew

Largest weight increases

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

  1. AAPLApple Inc.
    +2.68 pp0.6% → 3.3%History
  2. Redfin Corp75737FAE8
    +1.61 pp0.0% → 1.6%
  3. AJGArthur J. Gallagher & Co.
    +1.00 pp0.0% → 1.0%History
  4. BROSDutch Bros Inc.
    +0.68 pp0.0% → 0.7%History
  5. Workiva Inc98139AAB1
    +0.63 pp0.0% → 0.6%

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. AMATApplied Materials Inc
    −$44.0MReducedHistory
  2. John Bean Technologies Corp477839AB0
    −$41.2MSold out
  3. Penn Natl Gaming Inc707569AU3
    −$35.5MSold out
  4. Q2 Hldgs Inc74736LAD1
    −$35.3MSold out
  5. BROBrown & Brown, Inc.
    −$25.9MSold outHistory

Largest weight decreases

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

  1. John Bean Technologies Corp477839AB0
    −2.13 pp2.1% → 0.0%
  2. Penn Natl Gaming Inc707569AU3
    −1.83 pp1.8% → 0.0%
  3. Q2 Hldgs Inc74736LAD1
    −1.82 pp1.8% → 0.0%
  4. BROBrown & Brown, Inc.
    −1.34 pp1.3% → 0.0%History
  5. LHXL3HARRIS Technologies, Inc.
    −1.29 pp1.6% → 0.3%History

Metrics

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

Portfolio value
$2.12B
+$182.1M (+9.4%) vs. prior quarter
Positions
231
+2 vs. prior quarter
Top 10 concentration
29.7%
Top 10 as share of value
Turnover
15.5%
Q2 2026, one quarter
Average holding period
11.4 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 $2.36B (Q4 2025)

Q1 2021: $1.83BQ2 2021: $1.94BQ3 2021: $1.83BQ4 2021: $2.00BQ1 2022: $1.82BQ2 2022: $1.34BQ3 2022: $1.33BQ4 2022: $1.38BQ1 2023: $1.47BQ2 2023: $1.51BQ3 2023: $1.36BQ4 2023: $1.58BQ1 2024: $1.70BQ2 2024: $1.94BQ3 2024: $1.97BQ4 2024: $2.15BQ1 2025: $2.03BQ2 2025: $2.09BQ3 2025: $2.22BQ4 2025: $2.36BQ1 2026: $1.94BQ2 2026: $2.12B
Q1 2021Q2 2026
13F filings of Osterweis Capital Management Inc by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Aug 14, 2026231$2.12BGOOGAAPLMarriott Vacations Worldwide Corpvs. Q1 2026SEC
Q1 2026May 15, 2026229$1.94BGOOGAffirm Hldgs IncAMZNvs. Q4 2025SEC
Q4 2025Feb 17, 2026285$2.36BGOOGMSFTAMZNvs. Q3 2025SEC
Q3 2025Nov 14, 2025275$2.22BGOOGMSFTAMZNvs. Q2 2025SEC
Q2 2025Aug 14, 2025283$2.09BMSFTGOOGAMZNvs. Q1 2025SEC
Q1 2025Jun 5, 2025Amended337$2.03BLyft, Inc.MSFTGOOGvs. Q4 2024SEC
Q4 2024Jun 5, 2025Amended196$2.15BGOOGMSFTAMZNvs. Q3 2024SEC
Q3 2024Nov 14, 2024190$1.97BMSFTGOOGPegasystems Incvs. Q2 2024SEC
Q2 2024Aug 14, 2024195$1.94BMSFTGOOGBiomarin Pharmaceutical Incvs. Q1 2024SEC
Q1 2024May 15, 2024190$1.70BMSFTGOOGJazz Investments I Ltdvs. Q4 2023SEC
Q4 2023Feb 14, 2024197$1.58BMSFTGOOGAMZNvs. Q3 2023SEC
Q3 2023Nov 14, 2023204$1.36BMSFTGOOGLHXvs. Q2 2023SEC
Q2 2023Aug 14, 2023209$1.51BMSFTGOOGAPDvs. Q1 2023SEC
Q1 2023May 15, 2023210$1.47BMSFTGOOGAPDvs. Q4 2022SEC
Q4 2022Feb 14, 2023233$1.38BMSFTGOOGAPDvs. Q3 2022SEC
Q3 2022Nov 14, 2022239$1.33BGOOGMSFTCVSvs. Q2 2022SEC
Q2 2022Aug 15, 2022134$1.34BGOOGMSFTCVSvs. Q1 2022SEC
Q1 2022May 16, 2022145$1.82BGOOGMSFTAMZNvs. Q4 2021SEC
Q4 2021Feb 14, 2022145$2.00BGOOGMSFTDHRvs. Q3 2021SEC
Q3 2021Nov 15, 2021143$1.83BGOOGMSFTJPMvs. Q2 2021SEC
Q2 2021Aug 16, 2021142$1.94BGOOGMSFTFDXvs. Q1 2021SEC
Q1 2021May 14, 2021134$1.83BGOOGMSFTJPM–SEC

13D and 13G filings

Companies where Osterweis Capital Management Inc reports owning 5% or more on Schedule 13D or 13G, and its latest filings.

Current stakes of 5% or more

Osterweis Capital Management Inc does not currently report owning 5% or more of any company.

Latest filings

5 filings on file made by Osterweis Capital Management Inc or listing it as a reporting person, newest first.

Schedule 13D and 13G filings by Osterweis Capital Management Inc
CompanyFiled (ET)FormStakeChangeEvent dateFiling
DSKEDaseke, Inc.Feb 14, 20256:23 AM ET13G/A0.00%0 shares–Below 5%Dec 31, 2024SEC
DSKEDaseke, Inc.Feb 14, 202413G/AOld format–––SEC
DSKEDaseke, Inc.Feb 14, 202313G/AOld format–––SEC
DSKEDaseke, Inc.Feb 14, 202213G/AOld format–––SEC
DSKEDaseke, Inc.Feb 16, 202113G/AOld format–––SEC