American Tower Corporation (AMT)

Historical Shares Outstanding

Current Count

466.6M

Financial Fundamentals

AMT • Quarterly Data • 5Y View

Share Count History

Date	Shares Out. (M)	Change (M)	Change %
2026-06-30	466.6	-0.3	-0.05%
2026-03-31	466.8	-2.3	-0.49%
2025-12-31	469.1	0.3	+0.06%
2025-09-30	468.9	0.1	+0.03%
2025-06-30	468.7	0.2	+0.04%
2025-03-31	468.5	0.1	+0.02%
2024-12-31	468.4	0.2	+0.03%
2024-09-30	468.3	0.5	+0.10%
2024-06-30	467.8	0.1	+0.03%
2024-03-31	467.7	0.2	+0.04%
2023-12-31	467.5	0.3	+0.06%
2023-09-30	467.2	0.2	+0.04%
2023-06-30	467.0	0.2	+0.04%
2023-03-31	466.8	0.1	+0.02%
2022-12-31	466.7	-0.1	-0.02%
2022-09-30	466.8	7.0	+1.52%
2022-06-30	459.8	2.6	+0.57%
2022-03-31	457.2	0.1	+0.02%
2021-12-31	457.1	0.2	+0.03%
2021-09-30	457.0	4.6	+1.02%
2021-06-30	452.4	6.1	+1.36%
2021-03-31	446.3	-0.1	-0.01%
2020-12-31	446.3	0.2	+0.04%
2020-09-30	446.2	0.3	+0.06%
2020-06-30	445.9	0.0	+0.01%
2020-03-31	445.8	-0.1	-0.02%
2019-12-31	445.9	0.1	+0.02%
2019-09-30	445.8	0.5	+0.11%
2019-06-30	445.3	0.7	+0.16%
2019-03-31	444.6	0.3	+0.07%
2018-12-31	444.3	0.2	+0.04%
2018-09-30	444.1	-0.2	-0.05%
2018-06-30	444.4	5.8	+1.33%
2018-03-31	438.5	6.0	+1.40%
2017-12-31	432.5	-0.4	-0.08%
2017-09-30	432.8	2.3	+0.54%
2017-06-30	430.5	0.3	+0.07%
2017-03-31	430.2	0.3	+0.07%
2016-12-31	429.9	-0.0	-0.01%
2016-09-30	429.9	0.9	+0.21%
2016-06-30	429.0	1.1	+0.26%
2016-03-31	427.9	0.1	+0.02%
2015-12-31	427.8	0.6	+0.13%
2015-09-30	427.2	0.3	+0.07%
2015-06-30	426.9	17.5	+4.28%
2015-03-31	409.4	8.5	+2.12%
2014-12-31	400.9	0.5	+0.13%
2014-09-30	400.4	0.8	+0.20%
2014-06-30	399.6	0.5	+0.12%
2014-03-31	399.1	0.5	+0.13%
2013-12-31	398.6	0.3	+0.07%
2013-09-30	398.3	-1.1	-0.28%
2013-06-30	399.5	-0.2	-0.05%
2013-03-31	399.7	0.0	+0.01%
2012-12-31	399.6	0.1	+0.03%
2012-09-30	399.5	0.7	+0.17%
2012-06-30	398.8	0.4	+0.09%
2012-03-31	398.5	0.0	+0.00%
2011-12-31	398.5	3.3	+0.83%
2011-09-30	395.2	-5.1	-1.27%
2011-06-30	400.3	-1.6	-0.41%
2011-03-31	401.9	0.0	+0.00%
2010-12-31	401.9	-1.6	-0.39%
2010-09-30	403.5	-1.6	-0.39%
2010-06-30	405.0	-1.1	-0.26%
2010-03-31	406.1	0.0	+0.00%
2009-12-31	406.1	0.4	+0.09%
2009-09-30	405.7	-3.1	-0.76%
2009-06-30	408.8	0.6	+0.14%
2009-03-31	408.3	0.0	+0.00%
2008-12-31	408.3	-8.3	-1.99%
2008-09-30	416.5	-5.1	-1.20%
2008-06-30	421.6	-0.0	-0.00%
2008-03-31	421.6	0.0	+0.00%
2007-12-31	421.6	3.6	+0.86%
2007-09-30	418.0	-11.8	-2.75%
2007-06-30	429.8	-9.7	-2.21%
2007-03-31	439.6	0.0	+0.00%
2006-12-31	439.6	4.4	+1.02%
2006-09-30	435.1	-0.5	-0.11%
2006-06-30	435.6	18.2	+4.37%
2006-03-31	417.4	0.0	+0.00%
2005-12-31	417.4	83.2	+24.91%
2005-09-30	334.1	103.3	+44.78%
2005-06-30	230.8	0.6	+0.28%
2005-03-31	230.2	0.0	+0.00%
2004-12-31	230.2	5.3	+2.37%
2004-09-30	224.8	1.3	+0.56%
2004-06-30	223.6	3.2	+1.44%
2004-03-31	220.4	0.0	+0.00%
2003-12-31	220.4	6.6	+3.10%
2003-09-30	213.8	10.9	+5.36%
2003-06-30	202.9	7.2	+3.68%
2003-03-31	195.7	0.0	+0.00%
2002-12-31	195.7	0.1	+0.07%
2002-09-30	195.6	0.2	+0.10%
2002-06-30	195.4	0.1	+0.04%
2002-03-31	195.3	0.0	+0.00%
2001-12-31	195.3	2.2	+1.11%
2001-09-30	193.1	2.4	+1.25%
2001-06-30	190.8	3.6	+1.91%
2001-03-31	187.2	0.0	+0.00%
2000-12-31	187.2	9.1	+5.12%
2000-09-30	178.1	17.0	+10.58%
2000-06-30	161.0	4.5	+2.88%
2000-03-31	156.5	0.0	+0.00%
1999-12-31	156.5	0.9	+0.57%
1999-09-30	155.6	0.0	+0.01%
1999-06-30	155.6	24.3	+18.54%
1999-03-31	131.3	0.0	+0.00%
1998-12-31	131.3	26.6	+25.47%
1998-09-30	104.6	-170.7	-62.00%
1998-06-30	275.3	0.0	0.00%
1998-03-31	275.3	0.0	0.00%
1997-12-31	275.3	0.0	0.00%
1997-09-30	275.3	-170.7	-38.27%
1997-06-30	446.0	0.0	0.00%
1997-03-31	446.0	—	—