Harbor Advisors LLC holds a focused book of 194 stocks worth $795.1M as of Q2 2026 (disclosed Jul 28, 2026, a ~45-day 13F lag). This quarter they opened McDonald's Corp and trimmed Micron Technology Inc. Their largest long position is Equinix Inc at 31% of the equity book. Cloning the disclosed picks since 2024 would be +32% (+17.7%/yr). That is a simulation of the disclosed long book, not audited returns.
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curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/1687156/holdings"
Use Arkolith to show Harbor Advisors LLC's latest holdings, largest changes, and filing provenance.
Growth of $10,000 cloning Harbor Advisors LLC's disclosed long 13F book, rebalanced on each filing date (so it reflects the ~45-day reporting lag, 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: focused book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
100% mapped to company sectors
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, no cost basis
Other tracked managers holding the same core names as Harbor Advisors LLC
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| BlackRock, Inc. | 80 / 80 | $2.2T |
| FMR LLC | 80 / 80 | $805.4B |
| GEODE CAPITAL MANAGEMENT, LLC | 80 / 80 | $666.6B |
| MORGAN STANLEY | 80 / 80 | $478.6B |
| JPMORGAN CHASE & CO | 80 / 80 | $474.6B |
| BANK OF AMERICA CORP /DE/ | 80 / 80 | $288.7B |
| NORTHERN TRUST CORP | 80 / 80 | $284.3B |
| GOLDMAN SACHS GROUP INC | 80 / 80 | $221.3B |
Ranked by how many of Harbor Advisors LLC's top 80 disclosed names each fund also holds: a cross-fund conviction signal from the latest 13F of every tracked manager.
Bars show each stock's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Equinix Inc COM | $249.4M | 239.2K | 31.4% | —Held | |
| 2 | Micron Technology Inc COM | $57.7M | 50.0K | 7.3% | ▼−2.0% Reduced · −1K sh | |
| 3 | Alphabet Inc CAP STK CL A | $52.0M | 145.6K | 6.5% | —Held | |
| 4 | Apple Inc COM | $42.9M | 148.4K | 5.4% | —Held | |
| 5 | Amazon Com Inc COM | $36.5M | 153.2K | 4.6% | —Held | |
| 6 | Nvidia Corporation COM | $36.0M | 180.0K | 4.5% | —Held | |
| 7 | Canadian Nat Res Ltd Med Ter COM | $19.7M | 499.8K | 2.5% | —Held | |
| 8 | Interactive Brokers Group In COM CL A | $16.3M | 186.8K | 2.0% | —Held | |
| 9 | Ftai Aviation Ltd SHS | $15.4M | 57.0K | 1.9% | —Held | |
| 10 | Mastercard Incorporated CL A | $13.4M | 26.0K | 1.7% | —Held | |
| 11 | Microsoft Corp COM | $9.9M | 26.5K | 1.2% | —Held | |
| 12 | Ferguson Enterprises Inc COMMON STOCK NEW | $9.8M | 41.3K | 1.2% | —Held | |
| 13 | Bank Of N T Butterfield & So SHS NEW | $8.6M | 144.9K | 1.1% | —Held | |
| 14 | JPMorgan Chase & Co COM | $7.9M | 24.1K | 1.0% | —Held | |
| 15 | Meta Platforms Inc CL A | $7.8M | 13.8K | 1.0% | —Held | |
| 16 | Nebius Group N.V. SHS CLASS A | $7.6M | 27.6K | 1.0% | —Held | |
| 17 | Alphabet Inc CAP STK CL C | $7.1M | 20.0K | 0.9% | —Held | |
| 18 | PJT Partners Inc COM CL A | $6.3M | 41.5K | 0.8% | —Held | |
| 19 | Nucor Corp COM | $6.2M | 28.0K | 0.8% | —Held | |
| 20 | S&P Global Inc COM | $5.6M | 13.7K | 0.7% | —Held | |
| 21 | Digital Rlty TR Inc COM | $5.5M | 30.6K | 0.7% | ▲+20% Added · +5K sh | |
| 22 | Evercore Inc CLASS A | $5.1M | 15.0K | 0.6% | —Held | |
| 23 | Crowdstrike Hldgs Inc CL A | $4.8M | 6.3K | 0.6% | —Held | |
| 24 | BlackRock Inc COM | $3.8M | 3.9K | 0.5% | —Held | |
| 25 | Walmart Inc COM | $3.7M | 33.0K | 0.5% | —Held | |
| 26 | Moodys Corp COM | $3.6M | 8.0K | 0.5% | —Held | |
| 27 | T-Mobile US Inc COM | $3.5M | 20.6K | 0.4% | —Held | |
| 28 | Palo Alto Networks Inc COM | $3.4M | 10.0K | 0.4% | —Held | |
| 29 | Eog Res Inc COM | $3.4M | 25.9K | 0.4% | —Held | |
| 30 | Houlihan Lokey Inc CL A | $3.4M | 25.0K | 0.4% | —Held | |
| 31 | Metropolitan BK Hldg Corp COM | $3.1M | 31.5K | 0.4% | —Held | |
| 32 | Ge Aerospace COM NEW | $2.6M | 7.0K | 0.3% | —Held | |
| 33 | Martin Marietta Matls Inc COM | $2.6M | 4.5K | 0.3% | —Held | |
| 34 | PNC Finl Svcs Group Inc COM | $2.6M | 10.4K | 0.3% | —Held | |
| 35 | Danaher Corp Del COM | $2.4M | 12.5K | 0.3% | —Held | |
| 36 | Akamai Technologies Inc COM | $2.4M | 20.0K | 0.3% | —Held | |
| 37 | Hilton Worldwide Hldgs Inc COM | $2.4M | 7.1K | 0.3% | —Held | |
| 38 | Advanced Micro Devices Inc COM | $2.3M | 4.0K | 0.3% | —Held | |
| 39 | FB Finl Corp COM | $2.3M | 40.8K | 0.3% | —Held | |
| 40 | Devon Energy Corp New COM | $2.2M | 52.4K | 0.3% | ▲+407% Added · +42K sh | |
| 41 | Popular Inc COM NEW | $2.1M | 13.0K | 0.3% | —Held | |
| 42 | Chevron Corporation COM | $2.1M | 12.6K | 0.3% | —Held | |
| 43 | Home Depot Inc COM | $1.9M | 5.5K | 0.2% | —Held | |
| 44 | Fox Corp CL B COM | $1.9M | 41.3K | 0.2% | —Held | |
| 45 | Gallagher Arthur J & Co COM | $1.9M | 8.4K | 0.2% | —Held | |
| 46 | Equifax Inc COM | $1.9M | 12.0K | 0.2% | —Held | |
| 47 | Apollo Global Mgmt Inc COM | $1.9M | 15.9K | 0.2% | —Held | |
| 48 | Customers Bancorp Inc COM | $1.8M | 23.0K | 0.2% | —Held | |
| 49 | GDS Hldgs Ltd SPONSORED ADS | $1.8M | 60.0K | 0.2% | ▲+26% Added · +13K sh | |
| 50 | Everest Group Ltd COM | $1.8M | 5.0K | 0.2% | —Held |
As-of date vs the date the SEC received each filing
| Quarter | As of | Filed | Positions | Value | Form |
|---|---|---|---|---|---|
| Q2 2026 | Jun 30, 2026 | Jul 28, 2026 | 194 | $795.1M | 13F-HR |
| Q1 2026 | Mar 31, 2026 | May 7, 2026 | 197 | $692.2M | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Jan 30, 2026 | 193 | $665.8M | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Nov 12, 2025 | 190 | $648.4M | 13F-HR |
| Q2 2025 | Jun 30, 2025 | Aug 13, 2025 | 190 | $611.0M | 13F-HR |
| Q1 2025 | Mar 31, 2025 | May 15, 2025 | 193 | $576.0M | 13F-HR |
| Q4 2024 | Dec 31, 2024 | Feb 11, 2025 | 192 | $636.5M | 13F-HR |
| Q3 2024 | Sep 30, 2024 | Nov 14, 2024 | 188 | $597.5M | 13F-HR |
Holdings from SEC EDGAR 13F-HR filings, updated quarterly ~45 days after quarter-end. Public domain. The book and weighting are long equity only; 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.