Osterweis Capital Management Inc holds a diversified book of 231 reported positions worth $2.1B as of Q2 2026 (disclosed Aug 14, 2026, a ~45-day 13F lag). This quarter Space Exploration Techn-CL A first appears in 13F filings, a listing rather than a purchase; they opened Redfin Corp and trimmed Alphabet Inc-CL C. Their largest long position is Alphabet Inc-CL C at 5% of the reported non-option book. Cloning the disclosed picks since 2013 would be +310% (+11.6%/yr). That is a simulation of the disclosed long book, not audited returns.
The reported book (valued from quarter-end) returned +363.9%, a 53.6-point gap that is the cost of the ~45-day 13F disclosure lag a real follower can't avoid.
Growth of $10,000 cloning Osterweis Capital Management Inc's disclosed long 13F book, rebalanced on each filing date (so it reflects each quarter's actual reporting lag, ~45 days for the latest filing, with no look-ahead), total-return basis (dividends reinvested), derived from end-of-day prices. “Their reported book” values the same picks from quarter-end, before they were public. S&P 500 is SPY total return over the same window. Excludes shorts, cash, options and non-13F holdings. Not investment advice.
Top-heavy: diversified book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
87% mapped to company sectors
+5 sectors below the cut, 3% together
Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.
Estimated $ traded · quarter-end prices (an exit at the prior quarter-end), no cost basis
Other tracked managers holding the same core names as Osterweis Capital Management Inc
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| Hoey Investments, Inc | 26 / 80 | $594.9M |
| Independent Investors Inc | 13 / 80 | $367.2M |
| Ketron Financial | 11 / 80 | $216.6M |
| Skandinaviska Enskilda Banken AB (publ) | 16 / 80 | $1.7B |
| Integrated Financial Solutions, Inc. | 10 / 80 | $116.4M |
| Private Capital Advisors, Inc. | 11 / 80 | $696.9M |
| V. M. Manning & Co., Inc. | 11 / 80 | $69.6M |
| Brown Shipley& Co Ltd | 12 / 80 | $112.9M |
Ranked by the share of each fund's own book sitting in the names it shares with Osterweis Capital Management Inc: only funds sharing at least a tenth of the book qualify. Index giants, bank custody books and market makers are excluded. They hold everything, so their overlap says nothing.
Bars show each position's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Alphabet Inc CAP STK CL C | $113.8M | 322.2K | 5.4% | ▼−1.5% Reduced · −5K sh | |
| 2 | Apple Inc COM | $69.4M | 239.8K | 3.3% | ▲+426% Added · +194K sh | |
| 3 | Marriott Vacations Worldwide NOTE 3.250%12/1 | $62.2M | 63.26M | 2.9% | ▲+27% Added · +13.3M sh | |
| 4 | Amazon Com Inc COM | $60.2M | 252.7K | 2.8% | ▼−2.4% Reduced · −6K sh | |
| 5 | Applied Matls Inc COM | $58.8M | 81.3K | 2.8% | ▼−43% Reduced · −61K sh | |
| 6 | Affirm Hldgs Inc NOTE 11/1 | $56.6M | 57.50M | 2.7% | —Held | |
| 7 | Analog Devices Inc COM | $53.7M | 135.2K | 2.5% | ▼−10% Reduced · −15K sh | |
| 8 | Microsoft Corp COM | $52.6M | 140.9K | 2.5% | ▼−2.6% Reduced · −4K sh | |
| 9 | Eli Lilly & Co COM | $52.3M | 43.6K | 2.5% | ▼−2.7% Reduced · −1K sh | |
| 10 | Broadcom Inc COM | $51.1M | 135.4K | 2.4% | ▼−13% Reduced · −20K sh | |
| 11 | Visa Inc COM CL A | $48.8M | 142.2K | 2.3% | ▼−1.2% Reduced · −2K sh | |
| 12 | Waste Connections Inc COM | $46.4M | 278.5K | 2.2% | ▲+16% Added · +38K sh | |
| 13 | JPMorgan Chase & Co COM | $45.8M | 140.0K | 2.2% | ▼−1.0% Reduced · −1K sh | |
| 14 | Nvidia Corporation COM | $44.5M | 222.3K | 2.1% | ▼−2.8% Reduced · −6K sh | |
| 15 | Pebblebrook Hotel TR NOTE 1.750%12/1 | $40.3M | 40.57M | 1.9% | ▲+20% Added · +6.7M sh | |
| 16 | Autozone Inc COM | $40.0M | 12.5K | 1.9% | ▼−0.7% Reduced · −88 sh | |
| 17 | US Foods Hldg Corp COM | $36.1M | 353.1K | 1.7% | ▼−0.3% Reduced · −937 sh | |
| 18 | Danaher Corp Del COM | $35.4M | 186.0K | 1.7% | ▼−2.6% Reduced · −5K sh | |
| 19 | Redfin Corp NOTE 0.500% 4/0 | $34.1M | 35.38M | 1.6% | ▲New New position | |
| 20 | Abbvie Inc COM | $34.0M | 134.9K | 1.6% | ▲+26% Added · +27K sh | |
| 21 | Terreno Rlty Corp COM | $32.9M | 508.7K | 1.6% | ▼−8.5% Reduced · −47K sh | |
| 22 | American WTR WKS Co Inc New COM | $32.8M | 249.2K | 1.5% | ▼−2.8% Reduced · −7K sh | |
| 23 | Boeing Co COM | $31.8M | 146.8K | 1.5% | ▲+35% Added · +38K sh | |
| 24 | Progressive Corp COM | $31.1M | 142.2K | 1.5% | ▼−1.8% Reduced · −3K sh | |
| 25 | Lamar Advertising Co CL A | $30.8M | 197.5K | 1.5% | ▼−1.9% Reduced · −4K sh | |
| 26 | Ziff Davis Inc NOTE 1.750%11/0 | $30.3M | 30.59M | 1.4% | —Held | |
| 27 | Boston Scientific Corp COM | $30.3M | 708.9K | 1.4% | ▲+60% Added · +267K sh | |
| 28 | Synopsys Inc COM | $30.2M | 67.6K | 1.4% | ▲+54% Added · +24K sh | |
| 29 | Ametek Inc COM | $28.0M | 115.7K | 1.3% | ▼−1.0% Reduced · −1K sh | |
| 30 | Ferguson Enterprises Inc COMMON STOCK NEW | $27.4M | 115.6K | 1.3% | ▼−1.8% Reduced · −2K sh | |
| 31 | Deere & Co COM | $27.3M | 43.1K | 1.3% | ▼−1.0% Reduced · −423 sh | |
| 32 | NVR Inc COM | $27.0M | 4.0K | 1.3% | ▲+45% Added · +1K sh | |
| 33 | Canadian Pacific Kansas City COM | $26.4M | 304.8K | 1.2% | ▼−5.4% Reduced · −17K sh | |
| 34 | Gallagher Arthur J & Co COM | $21.1M | 92.0K | 1.0% | ▲New New position | |
| 35 | Air Products And Chemicals I COM | $20.6M | 70.4K | 1.0% | ▼−38% Reduced · −44K sh | |
| 36 | Vericel Corp COM | $17.7M | 398.4K | 0.8% | ▼−0.7% Reduced · −3K sh | |
| 37 | Life Time Group Holdings Inc COMMON STOCK | $17.5M | 429.2K | 0.8% | ▼−17% Reduced · −90K sh | |
| 38 | SPX Technologies Inc COM | $17.4M | 71.1K | 0.8% | ▲+45% Added · +22K sh | |
| 39 | Novanta Inc COM | $17.1M | 105.1K | 0.8% | ▼−1.8% Reduced · −2K sh | |
| 40 | Cardinal Infrastructure Grou CL A | $16.9M | 179.5K | 0.8% | ▲+5.6% Added · +10K sh | |
| 41 | SLB Limited COM STK | $16.9M | 363.5K | 0.8% | ▼−2.6% Reduced · −10K sh | |
| 42 | Twilio Inc CL A | $16.6M | 80.6K | 0.8% | ▲+22% Added · +15K sh | |
| 43 | Vse Corp COM | $16.4M | 71.7K | 0.8% | ▼−1.3% Reduced · −925 sh | |
| 44 | Axos Financial Inc COM | $16.1M | 165.7K | 0.8% | ▲+1.2% Added · +2K sh | |
| 45 | Loar Holdings Inc COM SHS | $15.2M | 188.9K | 0.7% | ▲+36% Added · +50K sh | |
| 46 | Repligen Corp COM | $15.1M | 111.0K | 0.7% | ▲+20% Added · +19K sh | |
| 47 | Keysight Technologies Inc COM | $14.8M | 42.3K | 0.7% | ▼−63% Reduced · −73K sh | |
| 48 | Guardant Health Inc COM | $14.6M | 97.3K | 0.7% | ▼−35% Reduced · −52K sh | |
| 49 | Upwork Inc NOTE 0.250% 8/1 | $14.6M | 14.68M | 0.7% | —Held | |
| 50 | Dutch Bros Inc CL A | $14.5M | 201.6K | 0.7% | ▲New New position |
This fund page is the Follow view. The Build view lets your agent pull holdings, quarter changes, overlap, and source filings through API or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/1007524/holdings"
Use Arkolith to show OSTERWEIS CAPITAL MANAGEMENT INC's latest holdings, largest changes, and filing provenance.
As-of date vs the date the SEC received each filing
Reported 13F total per quarter. Raw filing totals can include option notional.
| Quarter | As of | Filed | Lag | Positions | Value | Form |
|---|---|---|---|---|---|---|
| Q2 2026 | Jun 30, 2026 | Aug 14, 2026 | 45d | 280 | $2.1B | 13F-HR |
| Q1 2026 | Mar 31, 2026 | May 15, 2026 | 45d | 277 | $1.9B | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Feb 17, 2026 | 48d | 331 | $2.4B | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Nov 14, 2025 | 45d | 320 | $2.2B | 13F-HR |
| Q2 2025 | Jun 30, 2025 | Aug 14, 2025 | 45d | 327 | $2.1B | 13F-HR |
| Q1 2025 | Mar 31, 2025 | Jun 5, 2025 | 66d | 383 | $2.0B | 13F-HR/A |
| Q4 2024 | Dec 31, 2024 | Jun 5, 2025 | 156d | 246 | $2.1B | 13F-HR/A |
| Q3 2024 | Sep 30, 2024 | Nov 14, 2024 | 45d | 240 | $2.0B | 13F-HR |
| Q2 2024 | Jun 30, 2024 | Aug 14, 2024 | 45d | 243 | $1.9B | 13F-HR |
| Q1 2024 | Mar 31, 2024 | May 15, 2024 | 45d | 236 | $1.7B | 13F-HR |
| Q4 2023 | Dec 31, 2023 | Feb 14, 2024 | 45d | 244 | $1.6B | 13F-HR |
| Q3 2023 | Sep 30, 2023 | Nov 14, 2023 | 45d | 251 | $1.4B | 13F-HR |
| Q2 2023 | Jun 30, 2023 | Aug 14, 2023 | 45d | 256 | $1.5B | 13F-HR |
| Q1 2023 | Mar 31, 2023 | May 15, 2023 | 45d | 259 | $1.5B | 13F-HR |
| Q4 2022 | Dec 31, 2022 | Feb 14, 2023 | 45d | 284 | $1.4B | 13F-HR |
| Q3 2022 | Sep 30, 2022 | Nov 14, 2022 | 45d | 285 | $1.3B | 13F-HR |
| Q2 2022 | Jun 30, 2022 | Aug 15, 2022 | 46d | 181 | $1.3B | 13F-HR |
| Q1 2022 | Mar 31, 2022 | May 16, 2022 | 46d | 194 | $1.8B | 13F-HR |
| Q4 2021 | Dec 31, 2021 | Feb 14, 2022 | 45d | 197 | $2.0B | 13F-HR |
| Q3 2021 | Sep 30, 2021 | Nov 15, 2021 | 46d | 196 | $1.8B | 13F-HR |
| Q2 2021 | Jun 30, 2021 | Aug 16, 2021 | 47d | 194 | $1.9B | 13F-HR |
| Q1 2021 | Mar 31, 2021 | May 14, 2021 | 44d | 185 | $1.8B | 13F-HR |
Holdings from SEC EDGAR 13F-HR filings, updated quarterly, filed up to 45 days after quarter-end. Public domain. Book totals and portfolio weights cover reported non-option positions, which can include notes and warrants. Disclosed put/call options are listed separately and excluded from those totals. The performance line is a simulation of the disclosed long book, not an audited return.