Security key
03027X100
AMERICAN TOWER CORP /MA/ - Common Stock (AMT)
CUSIP: 03027X100
Q3 2026 13F Holders as of 30 Sep 2026
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 1,716,730
- Total 13F value
- $281,308,751
- Share change
- +12,000
- SEC-reported price per share
- $163.69
- Number of holders
- 90
- Value change
- +$2,009,527
- Number of buys
- 46
- Number of sells
- 35
- Shares outstanding
- 466,215,331
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q3 2026
Institutions
90
Top holders
10
AMT full security history
Ownership snapshot
Full 13F holder table
AMERICAN TOWER CORP /MA/ SEC filings
AMERICAN TOWER CORP /MA/ company facts
AMERICAN TOWER CORP /MA/ 13D/G history
Broader feeds
Reporting periods
Holder history for CUSIP 03027X100
Recent filing periods:
Ownership snapshot
Top reported holders of AMT - AMERICAN TOWER CORP /MA/ - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
15/15
Latest evidence
29 Jul 2026
13D/G
13F
3/4/5
Lead comparable stake: 9.2%
13D/G row: BlackRock, Inc.
Showing 1-6 of 15 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 9.2%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
9.2%
VANGUARD CAPITAL MANAGEMENT LLC
7.6%
VANGUARD PORTFOLIO MANAGEMENT LLC
5.9%
Vondran Steven O
0.02%
Rodney M. Smith
0.02%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13D/G
13F
Company
|
9.2%
|
$9,096,034,371
43,047,962 shares
|
$0 | 31 Dec 2024 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
7.6%
|
$6,082,733,798
35,245,879 shares
|
$0 | 31 Mar 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
5.9%
|
$4,783,737,772
27,718,958 shares
|
$0 | 31 Mar 2026 |
| Vondran Steven O |
3/4/5
President and CEO, Director
|
0.02%
|
$20,494,267
108,902 shares
|
-$6,309,967 | 10 Mar 2026 |
| Rodney M. Smith |
3/4/5
EVP, CFO & Treasurer
|
0.02%
|
$17,415,478
92,542 shares
|
-$6,596,528 | 10 Mar 2026 |
| Joann A. Reed |
3/4/5
Former Director
|
0.01%
|
$13,299,222
62,940 shares
|
— | 14 May 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q3 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
90
Shares
1,716,730
Rows available
90
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q3 2026 vs Q2 2026 Across Filers
Q2 2026 holders
1,753
Q3 2026 holders
90
Holder diff
-1,663
| Investor | Q2 2026 Shares | Q3 2026 Shares | Share Diff | Share Chg % | Q2 2026 value | Q3 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend