Harbor Advisors LLC

SEC CIK: 0001687156
Latest filing: Jul 28, 2026

SEC filings (opens in a new tab)

MLM holding history

Martin Marietta Materials Inc in every 13F filed by Harbor Advisors LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

MLM overview All 13F holders of MLM Full Q2 2026 holdings

Shares (Q2 2026): 4,500
Value: $2.60M
% of portfolio: 0.3%
Quarters held: 22; Since Q1 2021

Holdings of MLM by Harbor Advisors LLC, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q2 2026	4,500	$2.60M	0.3%	00.0%	Unchanged	Holders
Q1 2026	4,500	$2.65M	0.4%	00.0%	Unchanged	Holders
Q4 2025	4,500	$2.80M	0.4%	00.0%	Unchanged	Holders
Q3 2025	4,500	$2.84M	0.4%	00.0%	Unchanged	Holders
Q2 2025	4,500	$2.47M	0.4%	00.0%	Unchanged	Holders
Q1 2025	4,500	$2.15M	0.4%	00.0%	Unchanged	Holders
Q4 2024	4,500	$2.32M	0.4%	00.0%	Unchanged	Holders
Q3 2024	4,500	$2.42M	0.4%	00.0%	Unchanged	Holders
Q2 2024	4,500	$2.44M	0.4%	00.0%	Unchanged	Holders
Q1 2024	4,500	$2.76M	0.5%	00.0%	Unchanged	Holders
Q4 2023	4,500	$2.25M	0.4%	00.0%	Unchanged	Holders
Q3 2023	4,500	$1.85M	0.4%	00.0%	Unchanged	Holders
Q2 2023	4,500	$2.08M	0.4%	00.0%	Unchanged	Holders
Q1 2023	4,500	$1.60M	0.4%	00.0%	Unchanged	Holders
Q4 2022	4,500	$1.52M	0.4%	00.0%	Unchanged	Holders
Q3 2022	4,500	$1.45M	0.4%	00.0%	Unchanged	Holders
Q2 2022	4,500	$1.35M	0.3%	00.0%	Unchanged	Holders
Q1 2022	4,500	$1.73M	0.4%	00.0%	Unchanged	Holders
Q4 2021	4,500	$1.98M	0.4%	00.0%	Unchanged	Holders
Q3 2021	4,500	$1.54M	0.3%	00.0%	Unchanged	Holders
Q2 2021	4,500	$1.58M	0.3%	00.0%	Unchanged	Holders
Q1 2021	4,500	$1.51M	0.3%	–	–	Holders

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.