Q2 2026 13F · SEC CIK 1687156

Harbor Advisors LLC

Institutional asset managerFiled 2026-07-28 for Q2 2026. Open the filing ↗ · All SEC filings ↗

Reported 13F value: $795.1M
Reported positions: 194
Top holdings a year, 3 yrs: +21.4%
Assets under management: $851.7M

Harbor Advisors LLC is an institutional asset manager that reported 194 positions worth $795.1M in its Q2 2026 13F, filed 2026-07-28. Its largest holdings were Equinix Inc (EQIX, 31.4%), Micron Technology Inc (MU, 7.3%), Alphabet Inc (GOOGL, 6.5%). A portfolio copying its top holdings returned 21.4% a year over the last 3 years, against 20.4% for the S&P 500.

Harbor Advisors LLC holdings largest 50 of 194 positions.

Weights are shares of the filer's total reported 13F value, compared with Q1 2026. Share changes may reflect splits; weight changes also reflect price moves. A 13F shows long US-listed positions only, up to 135 days after the fact.

Harbor Advisors LLC 13F holdings
Stock	% of 13F value	Q1 2026	Shares	Share change	Reported value
EQIXEquinix Inc	31.4%	33.9%	239,240	+0.0%	$249.4M
MUMicron Technology Inc	7.3%	2.5%	50,000	-2.0%	$57.7M
GOOGLAlphabet Inc	6.5%	6.0%	145,600	+0.0%	$52.0M
AAPLApple Inc	5.4%	5.4%	148,400	+0.0%	$42.9M
AMZNAmazon Com Inc Com	4.6%	4.6%	153,200	+0.0%	$36.5M
NVDANvidia Corporation Com	4.5%	4.5%	180,000	+0.0%	$36.0M
CNQCanadian Nat Res Ltd Med Term Com	2.5%	3.5%	499,800	+0.0%	$19.7M
IBKRInteractive Brokers Group in	2.0%	1.8%	186,832	+0.0%	$16.3M
FTAIFtai Aviation Ltd	1.9%	2.0%	57,000	+0.0%	$15.4M
MAMastercard Inc.	1.7%	1.9%	26,000	+0.0%	$13.4M
MSFTMicrosoft Corp	1.2%	1.4%	26,500	+0.0%	$9.9M
FERGFerguson Enterprises Inc	1.2%	1.4%	41,255	+0.0%	$9.8M
NTBBank of Nt Butterfield&son L	1.1%	1.1%	144,908	+0.0%	$8.6M
JPMJpmorgan Chase & Co	1.0%	1.0%	24,148	+0.0%	$7.9M
METAMeta Platforms Inc Class A	1.0%	1.1%	13,800	+0.0%	$7.8M
NBISNebius Group N.v. Shs Class A	1.0%	0.4%	27,600	+0.0%	$7.6M
GOOGAlphabet Inc	0.9%	0.8%	20,000	+0.0%	$7.1M
PJTPjt Partners Inc	0.8%	0.8%	41,519	+0.0%	$6.3M
NUENucor Corp	0.8%	0.7%	27,992	+0.0%	$6.2M
SPGIS&P Global Inc.	0.7%	0.8%	13,667	+0.0%	$5.6M
DLRDigital Realty Trust Inc	0.7%	0.7%	30,552	+19.6%	$5.5M
EVREvercore Inc	0.6%	0.6%	15,000	+0.0%	$5.1M
CRWDCrowdstrike Hldgs Inc Class A	0.6%	0.4%	6,250	+0.0%	$4.8M
BLKBlackrock Inc	0.5%	0.5%	3,924	+0.0%	$3.8M
WMTWalmart Inc	0.5%	0.6%	33,000	+0.0%	$3.7M
MCOMoodys Corp	0.5%	0.5%	8,000	+0.0%	$3.6M
TMUST-Mobile US Inc	0.4%	0.6%	20,650	+0.0%	$3.5M
PANWPalo Alto Networks Inc	0.4%	0.2%	10,000	+0.0%	$3.4M
EOGEog Res Inc	0.4%	0.5%	25,900	+0.0%	$3.4M
HLIHoulihan Lokey Inc	0.4%	0.5%	25,000	+0.0%	$3.4M
MCBMetropolitan Bank Hld	0.4%	0.4%	31,500	+0.0%	$3.1M
GEGe Aerospace	0.3%	0.3%	7,000	+0.0%	$2.6M
MLMMartin Marietta Matls Inc	0.3%	0.4%	4,500	+0.0%	$2.6M
PNCPnc Finl Svcs Group Inc	0.3%	0.3%	10,444	+0.0%	$2.6M
DHRDanaher Corporation	0.3%	0.3%	12,505	+0.0%	$2.4M
AKAMAkamai Technologies Inc	0.3%	0.3%	20,000	+0.0%	$2.4M
HLTHilton Worldwide Holdings Inc	0.3%	0.3%	7,133	+0.0%	$2.4M
AMDAdvanced Micro Devices Inc	0.3%	—	4,000	—	$2.3M
FBKFb Finl Corp	0.3%	0.3%	40,799	+0.0%	$2.3M
DVNDevon Energy Corp	0.3%	—	52,360	—	$2.2M
BPOPPopular	0.3%	0.3%	13,000	+0.0%	$2.1M
CVXChevron Corp New	0.3%	0.4%	12,572	+0.0%	$2.1M
HDHome Depot Inc Com	0.2%	0.3%	5,500	+0.0%	$1.9M
FOXFox Corporation	0.2%	0.3%	41,265	+0.0%	$1.9M
AJGGallagher Arthur J & Co	0.2%	0.3%	8,375	+0.0%	$1.9M
EFXEquifax Inc	0.2%	0.3%	12,000	+0.0%	$1.9M
APOApollo Global Mgmt Inc Nclass	0.2%	0.3%	15,947	+0.0%	$1.9M
CUBICustomers Bancorp Inc	0.2%	—	23,000	—	$1.8M
GDSGds Hldgs Ltd	0.2%	0.3%	60,000	+26.3%	$1.8M
REEverest Group Ltd	0.2%	0.2%	5,000	+0.0%	$1.8M

What Harbor Advisors LLC bought and sold in Q2 2026, against Q1 2026.

New positions

Q1 2026's filing was too long to tell new positions apart.

Added to

GDS Gds Hldgs Ltd+26.3% shares
DLR Digital Realty Trust Inc+19.6% shares

Reduced

No position shrank by more than 5%.

Left the top 50

COG Coterra Energy Incwas 0.3%
CHTR Charter Communications Incwas 0.3%
PLTR Palantir Technologies Inclass Class Awas 0.2%

Share counts compared with the Q1 2026 13F; a split also changes share counts. The latest filing lists more than 50 positions, so a position that left the top 50 may still be held.

How the holdings did against the S&P 500.

1 year: +39.2% /yr; S&P 500 +20.1%
3 years: +21.4% /yr; S&P 500 +20.4%
5 years: +10.8% /yr; S&P 500 +11.6%

A portfolio of the filer's 20 largest 13F positions, weighted by value and rebuilt each quarter on the day the filing became public. 13Fs show long US-listed positions only, so this is an estimate of the stock picks, not the fund's reported returns.

Reported 13F value by quarter.

13F value by quarter
Quarter	13F value	Positions
Q2 2026	$795.1M	194
Q1 2026	$692.2M	197
Q4 2025	$665.8M	193
Q3 2025	$648.4M	190
Q2 2025	$611.0M	190
Q1 2025	$576.0M	193
Q4 2024	$636.5M	192
Q3 2024	$597.5M	188
Q2 2024	$545.4M	178
Q1 2024	$544.4M	176
Q4 2023	$523.0M	175
Q3 2023	$466.8M	165

Questions about Harbor Advisors LLC's portfolio

What stocks does Harbor Advisors LLC own?

Harbor Advisors LLC's latest 13F, for Q2 2026 and filed Jul 28, 2026, lists 194 positions worth $795.1M. The largest are Equinix Inc (EQIX) at 31.4%, Micron Technology Inc (MU) at 7.3%, Alphabet Inc (GOOGL) at 6.5%, Apple Inc (AAPL) at 5.4% and Amazon Com Inc Com (AMZN) at 4.6%.

What did Harbor Advisors LLC buy last quarter?

In Q2 2026, Harbor Advisors LLC added Gds Hldgs Ltd (GDS) (+26.3% shares) and Digital Realty Trust Inc (DLR) (+19.6% shares), compared with its Q1 2026 filing.

What did Harbor Advisors LLC sell last quarter?

In Q2 2026, Harbor Advisors LLC cut from its top 50 Coterra Energy Inc (COG), cut from its top 50 Charter Communications Inc (CHTR) and cut from its top 50 Palantir Technologies Inclass Class A (PLTR), compared with its Q1 2026 filing.

How has Harbor Advisors LLC's portfolio performed?

A portfolio copying Harbor Advisors LLC's 20 largest 13F holdings each quarter, from the day each filing was public, returned +21.4% a year over the last 3 years, against +20.4% for the S&P 500. Over 1 year: +39.2% against +20.1%. Over 5 years: +10.8% a year against +11.6%.

When is Harbor Advisors LLC's next 13F filing due?

13F filings are due 45 days after each quarter ends. Harbor Advisors LLC's filing for the quarter ending Sep 30, 2026 is due by Nov 14, 2026; this page updates the day after it is published.

How much money does Harbor Advisors LLC manage?

Harbor Advisors LLC reported $851.7M of regulatory assets under management on its latest SEC Form ADV. Its 13F, which covers only US-listed stocks and options, totals $795.1M.