Harbor Advisors LLC holds a focused book of 194 reported positions worth $795.1M as of Q2 2026 (disclosed Jul 28, 2026, a ~28-day 13F lag). This quarter Patriot Acquisition Corp first appears in 13F filings (one of 2 new listings in the book), a listing rather than a purchase; they opened McDonald's Corp and trimmed Micron Technology Inc. Their largest long position is Equinix Inc at 31% of the reported non-option book.
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
+5 sectors below the cut, 2% 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 Harbor Advisors LLC
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| Chris Hohn | 8 / 80 | $49.5B |
| Hoey Investments, Inc | 42 / 80 | $670.5M |
| Draper Asset Management, LLC | 10 / 80 | $169.4M |
| Skye Global Management LP | 13 / 80 | $4.4B |
| Fremen Capital Management LP | 9 / 80 | $92.0M |
| Integrated Financial Solutions, Inc. | 14 / 80 | $147.3M |
| Carroll Investors, Inc | 16 / 80 | $181.6M |
| Prospect Hill Management, LLC | 9 / 80 | $198.9M |
Ranked by the share of each fund's own book sitting in the names it shares with Harbor Advisors LLC: 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 | 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 |
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/1687156/holdings"
Use Arkolith to show Harbor Advisors LLC'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 | Jul 28, 2026 | 28d | 194 | $795.1M | 13F-HR |
| Q1 2026 | Mar 31, 2026 | May 7, 2026 | 37d | 197 | $692.2M | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Jan 30, 2026 | 30d | 193 | $665.8M | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Nov 12, 2025 | 43d | 190 | $648.4M | 13F-HR |
| Q2 2025 | Jun 30, 2025 | Aug 13, 2025 | 44d | 190 | $611.0M | 13F-HR |
| Q1 2025 | Mar 31, 2025 | May 15, 2025 | 45d | 193 | $576.0M | 13F-HR |
| Q4 2024 | Dec 31, 2024 | Feb 11, 2025 | 42d | 192 | $636.5M | 13F-HR |
| Q3 2024 | Sep 30, 2024 | Nov 14, 2024 | 45d | 188 | $597.5M | 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. Price-derived performance is withheld until the price-source policy and freshness gate are green.