Sippican Capital Advisors

SEC CIK: 0001557406
Latest filing: Jul 22, 2026

SEC filings (opens in a new tab)

IRM holding history

Iron Mountain Inc in every 13F filed by Sippican Capital Advisors, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

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

Shares (Q2 2026): 20,602
Value: $2.60M
% of portfolio: 1.6%
Quarters held: 22; Since Q1 2021

Holdings of IRM by Sippican Capital Advisors, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q2 2026	20,602	$2.60M	1.6%	−2,125−9.4%	Reduced	Holders
Q1 2026	22,727	$2.32M	1.6%	−550−2.4%	Reduced	Holders
Q4 2025	23,277	$1.93M	1.2%	−255−1.1%	Reduced	Holders
Q3 2025	23,532	$2.40M	1.6%	−180−0.8%	Reduced	Holders
Q2 2025	23,712	$2.43M	1.8%	00.0%	Unchanged	Holders
Q1 2025	23,712	$2.04M	1.5%	−50−0.2%	Reduced	Holders
Q4 2024	23,762	$2.50M	1.8%	−1,055−4.3%	Reduced	Holders
Q3 2024	24,817	$2.95M	2.1%	−1,870−7.0%	Reduced	Holders
Q2 2024	26,687	$2.39M	1.9%	00.0%	Unchanged	Holders
Q1 2024	26,687	$2.14M	1.7%	00.0%	Unchanged	Holders
Q4 2023	26,687	$1.87M	1.5%	−90−0.3%	Reduced	Holders
Q3 2023	26,777	$1.59M	1.5%	−125−0.5%	Reduced	Holders
Q2 2023	26,902	$1.53M	1.4%	00.0%	Unchanged	Holders
Q1 2023	26,902	$1.42M	1.4%	+25+0.1%	Added	Holders
Q4 2022	26,877	$1.34M	1.3%	−220−0.8%	Reduced	Holders
Q3 2022	27,097	$1.19M	1.2%	−345−1.3%	Reduced	Holders
Q2 2022	27,442	$1.34M	1.3%	−6,810−19.9%	Reduced	Holders
Q1 2022	34,252	$1.90M	1.6%	−180−0.5%	Reduced	Holders
Q4 2021	34,432	$1.80M	1.5%	−1,530−4.3%	Reduced	Holders
Q3 2021	35,962	$1.56M	1.4%	−560−1.5%	Reduced	Holders
Q2 2021	36,522	$1.55M	1.3%	−3,930−9.7%	Reduced	Holders
Q1 2021	40,452	$1.50M	1.4%	–	–	Holders

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