First Dallas Securities Inc.

SEC CIK: 0001378559
Latest filing: Aug 3, 2026

SEC filings (opens in a new tab)

IRM holding history

Iron Mountain Inc in every 13F filed by First Dallas Securities Inc., 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 (Q3 2024): 0; Sold out in Q3 2024
Value: $0
% of portfolio: 0.0%
Quarters held: 3; Since Q4 2023

Holdings of IRM by First Dallas Securities Inc., by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q3 2024	0	$0	0.0%	−2,975−100.0%	Sold out	Holders
Q2 2024	2,975	$266.6K	0.1%	−2,375−44.4%	Reduced	Holders
Q1 2024	5,350	$429.0K	0.2%	−1,275−19.2%	Reduced	Holders
Q4 2023	6,625	$464.0K	0.2%	+6,625	New	Holders