Harbor Advisors LLC

Registered adviser

CIK

1687156

Location

West Palm Beach, FL

Portfolio Value

Small $795,011,323

Diversification

Diversified

Filing Date

Global Rank

#2,912 / 8,818 ▲ 9

Top Industry

REIT - Specialty 32.1%

Period ended 4 months ago

Filed Jul 28, 2026 · 3mo

26 quarters · since Mar 2020

Regulatory profile

From Form ADV, the SEC filer profile, 13D/13G type codes and N-CEN, never from the name.

Holder type

Registered adviser

Form ADV roster, Oct 1, 2026

Form ADV adviser

CRD 312432

Roster of Oct 1, 2026

Regulatory AUM

$851,737,076

Main clients

Corporations (99% of AUM)

LEI

213800FPS5C172PO6Q84

Form ADV history

Monthly rosters from Dec 2019; each row is a run with the same figures, newest first.

Rosters	Regulatory AUM	Main clients
Mar 2026 to Oct 2026	$851,737,076	Corporations (99%)
Apr 2025 to Feb 2026	$788,063,427	Corporations (100%)
Apr 2024 to Mar 2025	$690,174,491	Corporations (100%)
May 2023 to Mar 2024	$546,709,023	Corporations (100%)
Apr 2023	$546,709,023	Corporations (100%)
Apr 2022 to Mar 2023	$727,551,838	Corporations (100%)

2 earlier changes not shown.

Portfolio style

Measured from the filed 13F common-share book for Jun 30, 2026, never from the firm's own description.

Style

Concentrated

The top 10 positions are 68.7% of the book (60%+)

Turnover

Low turnover

2.6% over the last four quarters (under 30%)

Horizon

Long horizon

Value-weighted holding period 24.0 quarters (12+), a floor since 85.2% of the book was already held when coverage starts

Closest benchmark: the S&P 500 as of 2026-06-30, active share 65.0%; sector active share 38.7% against the combined 13F book's sector weights.

Over time 26 measured quarters

How the bands are measured

Style bands measure the filed 13F common-share book each closed quarter, tested in this order. Unknown: under $10,000,000 of valued equity or 5 stocks. Index-like (100+ stocks): active share of 20% or less against the closest benchmark, which is the S&P 500, S&P MidCap 400, S&P SmallCap 600, Russell 1000, Russell 2000, Nasdaq-100 or Dow Jones Industrial Average (weighted by an index-tracking fund's reported holdings or the index's constituents nearest the quarter end, over the names resolved to companies, and only when those are 90%+ of its weight) or every 13F filer's combined book, or index series holding 80%+ of the registered fund assets it advises (N-CEN) and equal to 50%+ of its book. Systematic-like: 500+ stocks, 100%+ annual turnover and a top 10 weight of 25% or less. Concentrated: a top 10 weight of 60%+ or 12 or fewer effective positions. Diversified active: none of these. Turnover is the smaller of buys and sells over average equity value, summed over four quarters: low under 30%, high 100%+. Horizon is the value-weighted number of quarters each position has been held: short under 4, long 12+.

Clone Performance

Build a hypothetical price-return history from this filer's public 13F holdings.

View clone backtest

Portfolio Concentration

194 tracked positions · as of Jun 30, 2026 · Δ vs Mar 31, 2026

Top Position

31.4%

−2.5 pts

Top 5

56.1%

+0.7 pts

Top 10

68.7%

+1.7 pts

HHI

1,194

Diversified−118

Portfolio Trend

26 quarters · across all stocks

Sector Breakdown

As of Jun 30, 2026

Sector	% Portfolio	Value	Positions
Real Estate	32.5%	$258,456,070	10
Technology	21.8%	$172,984,909	28
Financial Services	15.8%	$125,960,444	64
Communication Services	10.5%	$83,809,978	13
Industrials	6.2%	$49,321,181	28
Consumer Cyclical	5.8%	$46,328,898	13
Energy	3.9%	$30,651,159	9
Basic Materials	1.3%	$10,503,792	7
Healthcare	1.3%	$10,262,939	15
Consumer Defensive	0.7%	$5,637,653	5
Unclassified	0.1%	$1,094,300	2

Last Quarter's Activity

Export CSV

Jun 30, 2026 vs Mar 31, 2026

Added To

Positions the filer increased

7 positions

Ticker	Company	Δ Shares	Shares	Value
DVN	Devon Energy Corp	+42,030	52,360	$2,163,515
GDS	GDS Holdings Ltd	+12,500	60,000	$1,801,800
AII	American Integrity Insurance Group, Inc.	+7,500	38,192	$719,155
NBBK	NB Bancorp, Inc.	+7,500	17,500	$369,775
DLR	Digital Realty Trust, Inc.	+5,000	30,552	$5,486,528
WLFC	Willis Lease Finance Corp	+1,000	3,000	$686,400
FER	Ferrovial N.V.	+86	9,059	$621,537
No positions match the current search.

Trimmed

Positions the filer reduced

4 positions

Ticker	Company	Δ Shares	Shares	Value
CIFR	Cipher Digital Inc.	−20,000	10,000	$245,000
HAFC	Hanmi Financial Corp	−5,000	15,000	$486,000
CNC	Centene Corp	−5,000	7,000	$449,330
MU	Micron Technology Inc	−1,000	50,000	$57,714,500
No positions match the current search.

New Positions

Positions the filer opened this quarter

10 positions

Ticker	Company	Shares	Value
MCD	Mcdonalds Corp	2,000	$540,620
TRLV	Trulieve Cannabis Corp.	42,640	$419,151
TCBX	Third Coast Bancshares, Inc.	10,000	$404,000
NOW	ServiceNow, Inc.	3,000	$297,840
NVTS	Navitas Semiconductor Corp	15,000	$268,800
UPS	United Parcel Service Inc	2,000	$215,000
PTAC	Patriot Acquisition Corp.	19,069	$190,499
EROC	ERock, Inc.	11,600	$168,200
BTDR	Bitdeer Technologies Group	10,000	$158,700
FRMI	Fermi Inc.	10,000	$91,600
No positions match the current search.

Sold Out

Positions the filer fully exited

13 positions

Ticker	Company	Shares	Value
—		60,043	$2,109,911
XOM	ExxonMobil Holdings Corp	8,057	$1,366,950
LBTYK	Liberty Global Ltd.	24,320	$285,273
VSNT	Versant Media Group, Inc.	7,500	$277,650
HCA	HCA Healthcare, Inc.	500	$236,620
ISRG	Intuitive Surgical Inc	500	$230,495
KGC	Kinross Gold Corp	7,400	$225,848
DOW	Dow Inc.	5,000	$208,250
HSY	Hershey Co	1,000	$207,890
B	Barrick Mining Corp	5,000	$203,950
KURA	Kura Oncology, Inc.	20,000	$162,600
TH	Target Hospitality Corp.	15,000	$139,200
LBTYA	Liberty Global Ltd.	10,044	$121,431
No positions match the current search.

Portfolio Positions

Compact Export CSV View 13F filing

194 tracked positions · $795,011,323 total · filing declares 194 positions · $795,099,794 · as of Jun 30, 2026

All sectors Basic Materials Communication Services Consumer Cyclical Consumer Defensive Energy Financial Services Healthcare Industrials Real Estate Technology

Showing 1–50 of 194 positions by value · page 1 of 4

Ticker	Company	Type	Shares	Δ Shares	Value (USD)	% Δ Value	Held (qtrs)	Est. cost/share	% of Portfolio
EQIX	Equinix Inc Real Estate	Held	239,240	0	$249,381,383	+6.3%	26+	before history	31.37%
MU	Micron Technology Inc Technology	Reduced	50,000	-1,000	$57,714,500	+235.0%	26+	before history	7.26%
GOOGL	Alphabet Inc. Communication Services	Held	145,600	0	$52,033,072	+24.3%	26+	before history	6.54%
AAPL	Apple Inc. Technology	Held	148,400	0	$42,941,024	+14.0%	26+	before history	5.40%
AMZN	Amazon Com Inc Consumer Cyclical	Held	153,200	0	$36,513,688	+14.4%	26+	before history	4.59%
NVDA	Nvidia Corp Technology	Held	180,000	0	$36,016,200	+14.7%	26+	before history	4.53%
CNQ	CANADIAN NATURAL RESOURCES Ltd Energy	Held	499,800	0	$19,742,100	−18.9%	26+	before history	2.48%
IBKR	Interactive Brokers Group, Inc. Financial Services	Held	186,832	0	$16,261,857	+29.8%	26+	before history	2.05%
FTAI	FTAI Aviation Ltd. Industrials	Held	57,000	0	$15,420,210	+10.4%	15	$20.35	1.94%
MA	Mastercard Inc Financial Services	Held	26,000	0	$13,353,600	+2.8%	26+	before history	1.68%
MSFT	Microsoft Corp Technology	Held	26,500	0	$9,885,030	+0.8%	26+	before history	1.24%
FERG	Ferguson Enterprises Inc. Industrials	Held	41,255	0	$9,791,049	+1.7%	8	$202.58	1.23%
NTB	Bank of N.T. Butterfield & Son Ltd Financial Services	Held	144,908	0	$8,622,026	+13.4%	26+	before history	1.08%
JPM	Jpmorgan Chase & Co Financial Services	Held	24,148	0	$7,904,364	+11.3%	26+	before history	0.99%
META	Meta Platforms, Inc. Communication Services	Held	13,800	0	$7,773,402	−1.5%	26+	before history	0.98%
NBIS	Nebius Group N.V. Communication Services	Held	27,600	0	$7,622,292	+166.2%	26+	before history	0.96%
GOOG	Alphabet Inc. Communication Services	Held	20,000	0	$7,066,600	+23.2%	26+	before history	0.89%
PJT	PJT Partners Inc. Financial Services	Held	41,519	0	$6,266,877	+8.0%	26+	before history	0.79%
NUE	Nucor Corp Basic Materials	Held	27,992	0	$6,235,218	+31.7%	26+	before history	0.78%
SPGI	S&P Global Inc. Financial Services	Held	13,667	0	$5,566,022	−4.3%	26+	before history	0.70%
DLR	Digital Realty Trust, Inc. Real Estate	Added	30,552	+5,000	$5,486,528	+19.1%	26+	before history	0.69%
EVR	Evercore Inc. Financial Services	Held	15,000	0	$5,121,600	+14.4%	26+	before history	0.64%
CRWD	CrowdStrike Holdings, Inc. Technology	Held	6,250	0	$4,769,625	+95.5%	13	$190.81	0.60%
BLK	BlackRock, Inc. Financial Services	Held	3,924	0	$3,773,161	−0.0%	7	$1,014.92	0.47%
WMT	Walmart Inc. Consumer Defensive	Held	33,000	0	$3,737,580	−8.9%	26+	before history	0.47%
MCO	Moodys Corp Financial Services	Held	8,000	0	$3,623,360	+3.8%	26+	before history	0.46%
TMUS	T-Mobile US, Inc. Communication Services	Held	20,650	0	$3,463,624	−20.1%	26+	before history	0.44%
PANW	Palo Alto Networks Inc Technology	Held	10,000	0	$3,410,200	+112.7%	12	$128.68	0.43%
EOG	Eog Resources Inc Energy	Held	25,900	0	$3,360,007	−10.3%	26+	before history	0.42%
HLI	Houlihan Lokey, Inc. Financial Services	Held	25,000	0	$3,353,250	−6.6%	26+	before history	0.42%
MCB	Metropolitan Bank Holding Corp. Financial Services	Held	31,500	0	$3,110,940	+18.6%	13	$40.06	0.39%
GE	General Electric Co Industrials	Held	7,000	0	$2,616,110	+31.7%	13	$137.02	0.33%
MLM	Martin Marietta Materials Inc Basic Materials	Held	4,500	0	$2,595,150	−2.0%	26+	before history	0.33%
PNC	Pnc Financial Services Group, Inc. Financial Services	Held	10,444	0	$2,571,521	+18.3%	26+	before history	0.32%
DHR	Danaher Corp Healthcare	Held	12,505	0	$2,381,952	+0.5%	26+	before history	0.30%
AKAM	Akamai Technologies Inc Technology	Held	20,000	0	$2,364,200	+2.9%	26+	before history	0.30%
HLT	Hilton Worldwide Holdings Inc. Consumer Cyclical	Held	7,133	0	$2,357,171	+8.7%	26+	before history	0.30%
AMD	Advanced Micro Devices Inc Technology	Held	4,000	0	$2,323,640	+185.6%	12	$141.68	0.29%
FBK	FB Financial Corp Financial Services	Held	40,799	0	$2,258,224	+6.6%	26+	before history	0.28%
DVN	Devon Energy Corp Energy	Added	52,360	+42,030	$2,163,515	+316.2%	22	$41.26	0.27%
BPOP	Popular, Inc. Financial Services	Held	13,000	0	$2,134,340	+22.4%	26+	before history	0.27%
CVX	Chevron Corp Energy	Held	12,572	0	$2,083,934	−19.9%	26+	before history	0.26%
HD	Home Depot, Inc. Consumer Cyclical	Held	5,500	0	$1,939,740	+7.2%	26+	before history	0.24%
FOX	Fox Corp Communication Services	Held	41,265	0	$1,932,852	−11.8%	26+	before history	0.24%
AJG	Arthur J. Gallagher & Co. Financial Services	Held	8,375	0	$1,922,648	+6.0%	12	$240.42	0.24%
EFX	Equifax Inc Industrials	Held	12,000	0	$1,904,640	−11.9%	26+	before history	0.24%
APO	Apollo Global Management, Inc. Financial Services	Held	15,947	0	$1,886,689	+6.2%	18	$78.23	0.24%
CUBI	Customers Bancorp, Inc. Financial Services	Held	23,000	0	$1,819,300	+14.0%	13	$50.84	0.23%
GDS	GDS Holdings Ltd Technology	Added	60,000	+12,500	$1,801,800	−5.9%	4	$39.44	0.23%
EG	Everest Group, Ltd. Financial Services	Held	5,000	0	$1,786,150	+9.3%	26+	before history	0.22%

Showing the top 50 of 194 positions. Create a free account to see every position, past quarters, search, filters and CSV export.

Covers the securities this platform tracks: U.S.-listed common stock and the put/call positions reported on it. A 13F can also report security types outside that coverage — preferred shares, bonds, warrants, untracked share classes — so the filing's own declared total can exceed the figures above. The source filing is linked at the top of this table.