IRM — IRON MOUNTAIN INCToday's name, from the SEC's present-day ticker list — a present-day mapping, not the name as of each filing.

Congress trades
33
all time
Members · 12m
1
0 buys · 3 sells · by trade date
Latest filing
03-02
2026-03-02
Rows filed past the STOCK Act's 45-day window, stated on the row, never editorialised; both dates and the receipt stay on every row.
12
13F holders
787
top 500 listed · 2026-03-31
Congress: statutory ranges, filed up to 45 days after the trade · 13F: quarter-end snapshots, filed up to 45 days lateras of 2026-10-29
Congress 33Institutional 500

Congress · disclosure timeline

By trade date · 24 months · 6 rows ▲ buy, ▼ sell; height = lower bound (log scale). Trade date, not filing date — the filing lag is in the table below.

6 dated disclosures in the window, placed by trade date; magnitudes are the disclosed lower bounds, against gridlines at $15K, $250K, $5M.

Members active in IRM

12 months · most active first Rows = number of disclosures, not dollars. Net = lower bound of the net range. Committees as of each member's latest trade in the window (roster snapshot 2026-10-29).
Members disclosing IRM in the trailing 12 months
MemberRowsNet disclosed flow for this ticker: purchases minus sales, computed as a net range on the disclosed amounts. A lower bound is provable, never a point.
Markwayne Mullin R–OK3−$80.0K to −$17.0K

Committees: none of these members sat on a committee as of their latest trade in the window.

1 member

Congressional disclosures

Newest filed firstAll 33 rows ↗
Latest congressional filings mentioning IRM
FiledMemberSide · OwnerTraded · LagAmountRange · FlagsSrc
2026-03-02Markwayne Mullin R–OKSELL JT (jointly owned)Traded 02-04 +26d$1K–$15K
2026-01-13Markwayne Mullin R–OKSELL SP (spouse-owned)Traded 2025-12-18 +26d$15K–$50K
2026-01-13Markwayne Mullin R–OKSELLTraded 2025-12-18 +26d$1K–$15K
2025-02-27Markwayne Mullin R–OKBUY JT (jointly owned)Traded 02-03 +24d$1K–$15K
2025-01-31Markwayne Mullin R–OKBUY SP (spouse-owned)Traded 01-02 +29d$15K–$50K
2025-01-31Markwayne Mullin R–OKBUYTraded 01-02 +29d$15K–$50K
2024-01-03Thomas R. Carper D–DESELL partial · SP (partial sale, spouse-owned)Traded 2023-12-11 +23d$1K–$15K
2023-08-13Daniel S. Goldman D–NY-10SELLTraded 07-12 +32d$1K–$15K
2023-03-01Thomas R. Carper D–DESELL partial · SP (partial sale, spouse-owned)Traded 02-21 +8d$1K–$15K
2022-09-02Carol D. Miller R–WV-1BUY SP (spouse-owned)Traded 2021-03-04 LATE·547d$1K–$15K

13F holders · Quarter ended 2026-03-31Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt. · longs only

All holders ↗
Top institutional holders of IRM for quarter 2026-03-31, 1–25 of 787 holders
#FilerValueSecuritiesFlagsderived by Public Filings from this build's reviewed ticker-mapping holders list for this share class; that list carries each holder's share count, share change and filed date (the full holders view shows them), but no document links — the EDGAR link opens the filer's 13F list·§
1BlackRock, Inc.$3.4B1
derived ·§ EDGAR ↗
2VANGUARD PORTFOLIO MANAGEMENT LLC$2.6B1
derived ·§ EDGAR ↗
3VANGUARD CAPITAL MANAGEMENT LLC$1.9B1
derived ·§ EDGAR ↗
4STATE STREET CORP$1.8B1
derived ·§ EDGAR ↗
5FMR LLC$764M1
derived ·§ EDGAR ↗
6MORGAN STANLEY$475M1
derived ·§ EDGAR ↗
7PRINCIPAL FINANCIAL GROUP INC$466M1
derived ·§ EDGAR ↗
8DIMENSIONAL FUND ADVISORS LP$465M1
derived ·§ EDGAR ↗
9NORTHERN TRUST CORP$424M1
derived ·§ EDGAR ↗
10CHARLES SCHWAB INVESTMENT MANAGEMENT INC$410M1
derived ·§ EDGAR ↗
11Invesco Ltd.$401M1
derived ·§ EDGAR ↗
12Legal & General Group Plc$320M1
derived ·§ EDGAR ↗
13Daiwa Securities Group Inc.$317M1
derived ·§ EDGAR ↗
14DEUTSCHE BANK AG\$316M1
derived ·§ EDGAR ↗
15PRUDENTIAL FINANCIAL INC$247M1
derived ·§ EDGAR ↗
16Vontobel Holding Ltd.$216M1
derived ·§ EDGAR ↗
17Nuveen, LLC$211M1
derived ·§ EDGAR ↗
18Capital World Investors$191M1
derived ·§ EDGAR ↗
19AQR CAPITAL MANAGEMENT LLC$183M1
derived ·§ EDGAR ↗
20VANGUARD FIDUCIARY TRUST CO$169M1
derived ·§ EDGAR ↗
21DUFF & PHELPS INVESTMENT MANAGEMENT CO$161M1
derived ·§ EDGAR ↗
22Contour Asset Management LLC$148M1
derived ·§ EDGAR ↗
23ROYAL BANK OF CANADA$144M1
derived ·§ EDGAR ↗
24BANK OF AMERICA CORP /DE/$143M1
derived ·§ EDGAR ↗
25HSBC HOLDINGS PLC$130M1
derived ·§ EDGAR ↗
Show the top 500 of 787 holders
Truncated by Public Filings. Top 500 of 787 holders shown; the rest are on EDGAR. Method ↗

Crowding — not available in this build. No holder rows for the selected period, so no percentile can be ranked.

Congress ↔ notable managers · IRM

Congress · last 90 days

Buyers
0 — —
Sellers
0 — —

filed 2026-07-31 → 2026-10-29 · statutory ranges

Notable managers · quarter ended 2026-03-31

Trimming
0 — $0 held

by shares · $ = value heldNEW + ADD vs TRIM + EXIT, by share count. $ = reported value now, not the change. · IRON MTN INC DEL

Merged timeline of congressional filings and notable-manager moves on IRM
DateWhoChangeSize
2026-05-15Gotham Asset Management 13FADD+1,185 sh
2026-05-15Bridgewater Associates 13FNEW+4,694 sh

2 newest, by filing date · 13F rows are quarter-end snapshots, not trades

Congress vs filers

12 months
Congress net (rows)0 buy / 3 sell
Congress net ($ bound)−$80.0K to −$17.0K
Filersnot computedThe filer side needs per-issuer quarter-over-quarter actions, which the published aggregate does not carry for this issuer. Convergence and divergence are stated only when both sides are computed.