American Tower (AMT) Shares Outstanding (2009 - 2026)

American Tower has disclosed Shares Outstanding across 16 years of filings, most recently posting $466.0 million for Q1 2026.

• Shares Outstanding for Q1 2026 came in at $466.0 million, down 2.74% year-over-year; the trailing twelve-month figure through Mar 2026 was $466.0 million (down 2.74% YoY), and the FY2025 annual result was $466.3 million, down 2.52% from the prior year.
• Shares Outstanding came in at $466.0 million for Q1 2026 at American Tower, roughly flat from $466.3 million in the prior quarter.
• In the past five years, Shares Outstanding ranged from a high of $479.2 million in Q2 2025 to a low of $466.0 million in Q1 2026.
• The 5-year median for Shares Outstanding is $477.1 million (2023), against an average of $474.9 million.
• Across the five-year window, Shares Outstanding jumped 4265.55% in 2022 and dropped 2.74% in 2026, its largest moves.
• American Tower's Shares Outstanding stood at $476.5 million in 2022, then rose by 0.14% to $477.2 million in 2023, then climbed by 0.26% to $478.4 million in 2024, then slipped by 2.52% to $466.3 million in 2025, then retreated by 0.07% to $466.0 million in 2026.
• The last three Shares Outstanding figures came in at $466.0 million (Q1 2026), $466.3 million (Q4 2025), and $468.3 million (Q3 2025), per Business Quant data.