IRON MTN INC NEW

Ticker: IRM CUSIP: 46284V101 Class: COM

Chesley Taft & Associates LLC's Holding History (CIK: 0001164632)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 12,737 Value ($000) $1,057 Avg Close $92.78 Range $77.77 - $107.03

Q3 2025

Shares 11,476 Value ($000) $1,170 Avg Close $94.72 Range $86.18 - $103.65

Q2 2025

Shares 11,492 Value ($000) $1,179 Avg Close $91.94 Range $70.45 - $103.63

Q1 2025

Shares 11,667 Value ($000) $1,004 Avg Close $93.15 Range $78.66 - $108.27

Q4 2024

Shares 11,350 Value ($000) $1,193 Avg Close $112.79 Range $97.81 - $124.90

Q3 2024

Shares 11,700 Value ($000) $1,390 Avg Close $102.07 Range $84.42 - $115.60

Q2 2024

Shares 13,375 Value ($000) $1,199 Avg Close $76.66 Range $69.57 - $86.17

Q1 2024

Shares 14,650 Value ($000) $1,175 Avg Close $68.03 Range $60.70 - $77.13

Q4 2023

Shares 14,500 Value ($000) $1,015 Avg Close $58.41 Range $52.52 - $66.31

Q3 2023

Shares 13,900 Value ($000) $826 Avg Close $56.32 Range $51.77 - $59.93

Q1 2015

Shares 16,265 Value ($000) $593 Avg Close $20.80 Range $19.23 - $22.28

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	12,737	$1,057	$92.78	$77.77 - $107.03
Q3 2025	11,476	$1,170	$94.72	$86.18 - $103.65
Q2 2025	11,492	$1,179	$91.94	$70.45 - $103.63
Q1 2025	11,667	$1,004	$93.15	$78.66 - $108.27
Q4 2024	11,350	$1,193	$112.79	$97.81 - $124.90
Q3 2024	11,700	$1,390	$102.07	$84.42 - $115.60
Q2 2024	13,375	$1,199	$76.66	$69.57 - $86.17
Q1 2024	14,650	$1,175	$68.03	$60.70 - $77.13
Q4 2023	14,500	$1,015	$58.41	$52.52 - $66.31
Q3 2023	13,900	$826	$56.32	$51.77 - $59.93
Q1 2015	16,265	$593	$20.80	$19.23 - $22.28