Harbor Advisors LLC — 13F Holdings & Portfolio
CIK 1687156 · latest 13F-HR filed 2026-05-07
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
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AUM
$692.2M
Long-equity book
Holdings
197
Distinct positions
Period
2026-03-31
Filed 2026-05-07
Q/Q Activity
+9 / −5 / ↑64 / ↓82
vs 2025-12-31
Firm Profile & Key People
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- EQUINIX INC$40.8M +21.1%
- CANADIAN NAT RES LTD MED TER$7.4M +44.0%
- MICRON TECHNOLOGY INC$3.4M +24.5%
- FTAI AVIATION LTD$2.7M +24.5%
- GDS HLDGS LTD$1.2M +174.2%
Top Trims
- ALPHABET INC-$6.8M -14.0%
- AMAZON COM INC-$3.5M -9.8%
- MICROSOFT CORP-$2.8M -22.0%
- APPLE INC-$2.7M -6.6%
- NVIDIA CORPORATION-$2.2M -6.5%
New Positions
- PINNACLE FINL PARTNERS INC$1.0M
- WILLIS LEASE FIN CORP$340.5K
- VERSANT MEDIA GROUP INC$277.6K
- MADRIGAL PHARMACEUTICALS INC$261.7K
- DELL TECHNOLOGIES INC$246.2K
Exited Positions
- LANTHEUS HLDGS INC$266.2K
- KKR & CO INC$255.0K
- OCCIDENTAL PETE CORP$246.7K
- GCI LIBERTY INC$231.4K
- HOWARD HUGHES HOLDINGS INC$208.4K
All Holdings
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | EQUINIX INC | EQIX | 29444U700 | $234.5M | 33.88% | 239,240 | SH |
| 2 | ALPHABET INC | GOOGL | 02079K305 | $41.9M | 6.05% | 145,600 | SH |
| 3 | APPLE INC | AAPL | 037833100 | $37.7M | 5.44% | 148,400 | SH |
| 4 | AMAZON COM INC | AMZN | 023135106 | $31.9M | 4.61% | 153,200 | SH |
| 5 | NVIDIA CORPORATION | NVDA | 67066G104 | $31.4M | 4.54% | 180,000 | SH |
| 6 | CANADIAN NAT RES LTD MED TER | CNQ | 136385101 | $24.4M | 3.52% | 499,800 | SH |
| 7 | MICRON TECHNOLOGY INC | MU | 595112103 | $17.2M | 2.49% | 51,000 | SH |
| 8 | FTAI AVIATION LTD | FTAI | G3730V105 | $14.0M | 2.02% | 57,000 | SH |
| 9 | MASTERCARD INCORPORATED | MA | 57636Q104 | $13.0M | 1.88% | 26,000 | SH |
| 10 | INTERACTIVE BROKERS GROUP IN | IBKR | 45841N107 | $12.5M | 1.81% | 186,832 | SH |
| 11 | MICROSOFT CORP | MSFT | 594918104 | $9.8M | 1.42% | 26,500 | SH |
| 12 | FERGUSON ENTERPRISES INC | FERG | 31488V107 | $9.6M | 1.39% | 41,255 | SH |
| 13 | META PLATFORMS INC | META | 30303M102 | $7.9M | 1.14% | 13,800 | SH |
| 14 | BANK OF N T BUTTERFIELD & SO | NTB | G0772R208 | $7.6M | 1.10% | 144,908 | SH |
| 15 | JPMORGAN CHASE & CO | JPM | 46625H100 | $7.1M | 1.03% | 24,148 | SH |
| 16 | S&P GLOBAL INC | SPGI | 78409V104 | $5.8M | 0.84% | 13,667 | SH |
| 17 | PJT PARTNERS INC | PJT | 69343T107 | $5.8M | 0.84% | 41,519 | SH |
| 18 | ALPHABET INC | GOOG | 02079K107 | $5.7M | 0.83% | 20,000 | SH |
| 19 | NUCOR CORP | NUE | 670346105 | $4.7M | 0.68% | 27,992 | SH |
| 20 | DIGITAL RLTY TR INC | DLR | 253868103 | $4.6M | 0.67% | 25,552 | SH |
| 21 | EVERCORE INC | EVR | 29977A105 | $4.5M | 0.65% | 15,000 | SH |
| 22 | T-MOBILE US INC | TMUS | 872590104 | $4.3M | 0.63% | 20,650 | SH |
| 23 | WALMART INC | WMT | 931142103 | $4.1M | 0.59% | 33,000 | SH |
| 24 | BLACKROCK INC | BLK | 09290D101 | $3.8M | 0.55% | 3,924 | SH |
| 25 | EOG RES INC | EOG | 26875P101 | $3.7M | 0.54% | 25,900 | SH |
| 26 | HOULIHAN LOKEY INC | HLI | 441593100 | $3.6M | 0.52% | 25,000 | SH |
| 27 | MOODYS CORP | MCO | 615369105 | $3.5M | 0.50% | 8,000 | SH |
| 28 | NEBIUS GROUP N.V. | NBIS | N97284108 | $2.9M | 0.41% | 27,600 | SH |
| 29 | MARTIN MARIETTA MATLS INC | MLM | 573284106 | $2.6M | 0.38% | 4,500 | SH |
| 30 | METROPOLITAN BK HLDG CORP | MCB | 591774104 | $2.6M | 0.38% | 31,500 | SH |
| 31 | CHEVRON CORPORATION | CVX | 166764100 | $2.6M | 0.38% | 12,572 | SH |
| 32 | CROWDSTRIKE HLDGS INC | CRWD | 22788C105 | $2.4M | 0.35% | 6,250 | SH |
| 33 | DANAHER CORP DEL | DHR | 235851102 | $2.4M | 0.34% | 12,505 | SH |
| 34 | AKAMAI TECHNOLOGIES INC | AKAM | 00971T101 | $2.3M | 0.33% | 20,000 | SH |
| 35 | FOX CORP | FOX | 35137L204 | $2.2M | 0.32% | 41,265 | SH |
| 36 | PNC FINL SVCS GROUP INC | PNC | 693475105 | $2.2M | 0.31% | 10,444 | SH |
| 37 | HILTON WORLDWIDE HLDGS INC | HLT | 43300A203 | $2.2M | 0.31% | 7,133 | SH |
| 38 | EQUIFAX INC | EFX | 294429105 | $2.2M | 0.31% | 12,000 | SH |
| 39 | FB FINL CORP | FBK | 30257X104 | $2.1M | 0.31% | 40,799 | SH |
| 40 | COTERRA ENERGY INC | CTRA | 127097103 | $2.1M | 0.30% | 60,043 | SH |
| 41 | GE AEROSPACE | GE | 369604301 | $2.0M | 0.29% | 7,000 | SH |
| 42 | GDS HLDGS LTD | GDS | 36165L108 | $1.9M | 0.28% | 47,500 | SH |
| 43 | CHARTER COMMUNICATIONS INC | CHTR | 16119P108 | $1.9M | 0.27% | 8,744 | SH |
| 44 | GALLAGHER ARTHUR J & CO | AJG | 363576109 | $1.8M | 0.26% | 8,375 | SH |
| 45 | HOME DEPOT INC | HD | 437076102 | $1.8M | 0.26% | 5,500 | SH |
| 46 | APOLLO GLOBAL MGMT INC | APO | 03769M106 | $1.8M | 0.26% | 15,947 | SH |
| 47 | POPULAR INC | BPOP | 733174700 | $1.7M | 0.25% | 13,000 | SH |
| 48 | EVEREST GROUP LTD | EG | G3223R108 | $1.6M | 0.24% | 5,000 | SH |
| 49 | PALANTIR TECHNOLOGIES INC | PLTR | 69608A108 | $1.6M | 0.23% | 11,000 | SH |
| 50 | PALO ALTO NETWORKS INC | PANW | 697435105 | $1.6M | 0.23% | 10,000 | SH |
Filing History
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-03-31 | 2026-05-07 | $692.2M | 197 | 0001214659-26-005743 |
| 2025-12-31 | 2026-01-30 | $665.8M | 193 | 0001214659-26-000986 |