American Tower Corporation (REIT) AMT

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American Tower Corporation (REIT) Common Stock · Company · NYSE · Real Estate / REIT - Specialty

Paper trade (simulated — no real money)

Fill: USD 188.9700 · FX 1 USD = 1.277900 SGD · about SGD 241.4848 per unit

Sign in to place simulated trades. USD fills are converted into the SGD portfolio at the displayed rate.

Announcement types: (default: consequential filings)
Results & current reports
Capital markets
Ownership & governance

USD closing-price chart (daily close from yfinance · Last year)

USD 191.52 → 188.97 · -1.3%
194.120177.590161.060 1,2 3 4,5 6 7 8 9 10 11,12 13 14 15 16,17 18,19,20 21 22,23 24 25 26 27 28 29,30 31,32 33 34 35 Oct 25Jan 26Apr 26Jul 26Oct 26

Numbered dotted lines mark the filtered filings under Announcement Events below.

Price & SEC Filing History 24 Oct 2025 — 25 Oct 2026 (Last year)

Daily NYSE prices are sourced from yfinance. Yellow highlighting marks an intraday rise or a gap up between adjacent trading sessions. SEC acceptance times are converted to US Eastern time: pre-market filings appear below that day’s OHLCV row; filings accepted after the 09:30 ET open appear above it. The SEC does not publish an exact first-public-availability timestamp, so acceptance time is the best available proxy.

Weekend
Weekend
200.7200 202.1300 185.4400 188.9700 8,706,309
178.6500 182.7800 177.1800 181.5700 4,058,900
183.5000 183.7800 177.1000 177.6400 2,588,000
184.5000 185.8600 182.9600 183.5600 2,815,900
184.3900 186.0000 181.3100 183.0300 3,184,400
Weekend
Weekend
181.4800 185.8800 180.5400 185.2700 2,458,500
182.7500 184.6900 180.3700 181.3600 2,852,200
178.2400 179.9400 176.4200 179.4000 3,114,100
184.5000 184.7500 179.3600 179.4300 3,039,400
182.2500 183.3100 180.0300 182.5600 3,456,600
Weekend
Weekend
176.9100 182.5200 175.0200 182.2400 8,512,000
166.8400 167.4200 163.6600 166.7300 4,438,300
165.4400 168.3000 164.5700 166.1800 2,468,800
162.8600 165.2400 162.4200 164.7800 2,185,000
161.7800 162.6700 160.3000 162.2600 2,506,000
Weekend
Weekend
162.2200 165.2300 160.8500 162.2000 2,908,500
163.6200 164.7900 160.9400 161.0600 2,649,100
167.5700 167.7300 163.3500 163.6900 2,778,500
167.2500 169.2200 166.0700 167.3500 2,841,000
168.9000 169.8900 166.9700 168.0000 3,251,700
Weekend
Weekend
166.9500 169.2000 166.4200 169.0300 2,054,800
170.7800 171.0900 166.5400 167.2600 3,216,800
174.5700 175.9700 170.4600 170.7800 3,022,600
174.3000 177.0800 172.8400 175.2500 3,832,200
173.8300 175.4600 173.1100 174.6000 3,569,000
Weekend
Weekend
173.2000 175.5700 172.8200 173.9800 3,651,800
35 · 8-K Pre-market · 08:50 ET 8-K ↗
177.3800 177.3800 174.7500 175.5800 2,668,100
177.3900 179.8000 176.3400 176.3900 2,348,700
176.0900 178.7000 174.6900 177.7100 2,262,200
34 · 8-K After-hours · 16:16 ET 8-K ↗
179.1300 179.4700 174.8500 176.9400 2,422,100
Weekend
Weekend
174.5900 178.5400 174.3400 177.8500 1,911,700
33 · 424B2 After-hours · 16:15 ET 424B2 ↗
176.1800 176.8500 171.7500 172.9800 2,283,600
31 · 8-K After-hours · 17:29 ET 8-K ↗
175.4800 176.4500 174.6000 175.4300 2,048,700
32 · 424B5 Pre-market · 08:58 ET 424B5 ↗
178.3400 179.1900 174.2300 175.7300 2,137,600
No trading
Weekend
Weekend
176.3900 179.3900 175.3500 175.8500 1,931,600
174.9300 179.0500 174.8900 177.7500 1,963,000
175.9000 176.3900 171.7300 172.9200 2,579,000
175.9000 178.2400 174.6200 176.0200 2,389,200
175.9000 176.8700 173.3900 175.7000 2,858,100
Weekend
Weekend
174.5400 177.3200 174.2200 176.2300 1,597,100
174.1900 176.1100 173.5000 174.1600 2,204,900
180.0000 180.9800 175.3500 175.7300 2,002,200
177.8500 179.0000 177.0600 178.5700 1,401,200
176.4600 178.8600 175.9000 178.3900 1,596,500
Weekend
Weekend
175.9600 178.0200 174.4200 175.8000 1,746,100
177.0400 177.9100 174.9600 175.7200 1,904,200
173.0000 175.7600 172.6200 174.4900 1,435,300
174.8600 175.3300 172.2500 172.3300 1,869,100
174.9200 175.2200 170.1500 172.2300 2,678,300
Weekend
Weekend
174.2600 176.5900 173.7700 175.5800 1,853,100
171.3500 175.0000 171.2500 174.1900 1,357,000
169.2200 172.3900 168.9300 170.4300 1,797,300
168.5000 171.6200 168.5000 169.5500 1,584,100
171.2600 171.6200 168.7200 169.1100 1,801,100
Weekend
Weekend
170.5100 173.7700 170.5100 172.5400 1,560,500
169.6900 172.3800 167.3900 171.2000 2,896,000
173.9100 173.9100 162.5000 168.0700 5,294,200
170.5000 175.5500 169.0300 175.2500 2,990,800
174.6700 175.1600 171.7900 173.0000 2,505,900
Weekend
Weekend
172.6900 174.1700 170.9600 173.3600 4,302,400
177.3000 179.8600 172.8200 174.4600 3,697,400
174.9600 180.3700 172.5900 179.2600 5,367,700
30 · 10-Q After-hours · 16:07 ET 10-Q ↗
169.5400 178.6000 169.1600 171.5000 4,395,600
29 · 8-K Pre-market · 07:05 ET 8-K ↗
166.4200 168.2300 165.5500 166.7400 3,520,800
Weekend
Weekend
166.5300 169.4900 166.4200 166.6700 3,343,500
166.1800 168.2300 163.5900 164.6500 3,619,800
163.7400 166.8200 163.4700 166.0600 2,702,300
165.3100 166.6100 163.0700 163.3900 2,758,700
168.2300 169.7700 166.3600 167.0600 2,570,600
Weekend
Weekend
171.9400 172.6800 168.9000 170.0600 2,849,600
169.7800 170.1000 167.5600 168.9200 2,375,400
168.2000 171.3000 167.7800 168.6300 2,072,300
169.0000 169.3900 166.7000 168.8300 2,200,500
170.0000 170.9000 168.9700 169.5000 2,135,300
Weekend
Weekend
166.5000 168.9300 166.1800 168.5900 2,458,200
164.0800 166.0700 163.6600 165.0000 3,132,600
165.6000 166.7300 163.8400 165.0400 3,625,700
164.2300 166.4200 163.9300 165.2500 2,737,000
165.0000 165.7900 160.0600 162.1100 3,989,400
Weekend
Weekend
No trading
167.1600 169.7000 165.4400 166.0300 3,857,600
163.5300 168.1500 162.2700 166.0800 4,626,500
167.6900 168.6000 162.4000 163.5700 5,368,900
174.9400 175.8200 167.6400 168.6700 3,600,300
Weekend
Weekend
172.3700 176.6100 171.1400 175.5900 7,260,600
175.2300 175.2900 167.2400 168.7200 3,382,100
179.9000 180.4700 173.3400 174.4600 4,636,500
178.4900 179.7500 175.9900 179.3800 3,507,900
175.7300 178.4300 173.9900 176.4300 3,031,800
Weekend
Weekend
No trading
181.6400 181.9000 175.0000 176.0500 4,453,100
182.6400 183.8500 180.7900 181.0900 2,007,900
186.4900 187.3600 183.4700 184.4700 2,682,000
186.1200 188.0200 183.6900 185.7600 3,906,300
Weekend
Weekend
187.7300 190.1400 186.7900 187.1800 2,985,700
192.1000 192.9400 188.0500 189.3100 3,337,500
192.2900 192.9400 188.5900 192.5000 2,179,000
189.1600 193.9300 188.7300 190.8300 2,665,700
193.0000 193.4800 188.8800 189.1000 2,800,200
Weekend
Weekend
193.9800 196.0800 193.0200 194.1200 3,060,800
28 · 8-K After-hours · 16:39 ET 8-K ↗
187.2000 194.9700 185.0500 193.9100 4,071,300
184.2200 188.5900 181.4700 182.2400 5,585,700
27 · 8-K After-hours · 16:18 ET 8-K ↗
187.3200 187.3700 183.0700 185.5300 2,610,600
184.8200 187.9000 184.0100 187.5300 2,479,200
Weekend
Weekend
186.9300 187.6000 185.0000 186.9600 4,326,800
185.5600 188.3000 184.0100 186.6800 2,411,200
185.2800 188.5900 184.7100 184.9800 2,741,200
26 · 8-K Pre-market · 08:00 ET 8-K ↗
183.7900 186.9900 182.9700 184.9500 2,795,400
No trading
Weekend
Weekend
185.0200 185.0600 181.6200 183.8500 2,069,900
25 · 8-K After-hours · 16:17 ET 8-K ↗
183.2000 184.8400 181.9900 183.7800 2,929,200
24 · 424B2 After-hours · 16:11 ET 424B2 ↗
181.9600 184.0200 180.6600 184.0200 2,812,700
22 · 8-K After-hours · 16:14 ET 8-K ↗
178.8100 184.1200 177.7000 183.0000 4,659,700
23 · 424B5 Pre-market · 06:02 ET 424B5 ↗
170.8900 177.7800 170.6300 177.2800 3,242,300
Weekend
Weekend
170.1800 172.3500 167.3700 170.6300 4,632,900
174.6300 175.3000 170.1900 170.5000 2,922,200
176.7700 176.8100 171.0100 173.8700 3,271,000
174.5900 180.5100 174.5300 178.8200 3,384,000
177.0500 178.9900 176.1500 177.4700 2,456,400
Weekend
Weekend
179.8300 179.8300 176.1100 176.5300 3,510,200
21 · 8-K After-hours · 16:38 ET 8-K ↗
179.5000 180.9700 178.4300 179.7700 2,589,500
179.1500 181.2500 178.4100 180.1600 2,116,000
180.0000 180.6800 176.7100 178.1200 2,244,200
180.6700 182.6300 179.2300 180.8800 1,625,500
Weekend
Weekend
183.7700 184.1100 180.8700 181.6100 1,943,200
177.9900 182.9800 177.0700 182.7100 3,006,400
177.5400 179.2200 176.5900 178.1900 2,775,000
20 · DEFA14A After-hours · 16:13 ET DEFA14A ↗ 19 · 10-Q After-hours · 16:11 ET 10-Q ↗
176.5000 180.1800 174.2900 178.4000 4,484,600
18 · 8-K Pre-market · 07:04 ET 8-K ↗
178.6400 178.9000 174.7000 175.3000 3,046,500
Weekend
Weekend
178.8900 179.6200 176.2600 178.2100 3,065,000
177.5500 179.2100 176.3800 179.0100 2,433,900
176.9300 178.1900 174.8200 176.3100 2,269,500
181.7400 181.8800 174.3100 174.7600 3,564,000
181.3700 183.4300 180.5000 181.6600 2,778,700
Weekend
Weekend
178.2900 183.0700 177.4100 182.3600 4,708,600
177.1700 178.6400 176.5800 178.6000 1,915,900
177.7700 178.7000 176.2200 176.9900 2,129,100
178.4400 178.8400 173.0000 176.4100 2,887,200
179.4800 181.2100 178.4800 180.9400 2,597,700
Weekend
Weekend
180.5500 181.5800 178.3100 179.2900 3,179,700
175.2400 182.3600 175.2400 179.9300 3,273,800
175.0000 177.2000 173.7300 176.1800 3,465,200
17 · DEFA14A Pre-market · 08:35 ET DEFA14A ↗ 16 · DEF 14A Pre-market · 08:32 ET DEF 14A ↗
175.8200 176.3800 172.8900 174.0800 3,617,100
172.7400 177.2300 171.7200 176.1400 2,898,900
Weekend
Weekend
No trading
171.4900 176.4700 170.3400 173.7300 4,241,600
172.6700 173.9100 169.7900 171.0200 2,311,000
172.6300 173.1100 170.4800 172.5800 4,425,800
171.5400 173.0300 169.7800 170.3600 3,106,500
Weekend
Weekend
168.7900 171.6600 167.9700 169.5200 2,468,500
167.2900 169.0700 165.7500 168.9200 2,890,300
169.4800 171.9900 165.0800 167.2700 4,107,600
175.4900 176.3800 170.1000 170.3600 4,558,300
179.2000 179.6300 173.1500 176.5000 4,363,100
Weekend
Weekend
184.0200 185.7200 175.6000 176.7900 6,368,000
180.2900 183.0700 178.3500 182.7600 3,615,200
183.1400 184.2000 180.2000 180.6900 3,654,800
185.6000 187.8400 184.1400 185.0700 2,728,900
185.7300 186.2100 184.1500 184.7100 2,267,300
Weekend
Weekend
182.1000 184.5400 181.0100 184.4100 3,194,200
181.0600 184.1800 179.6000 179.8600 3,070,400
185.6100 185.6100 182.4900 182.8500 1,587,900
15 · 8-K After-hours · 16:24 ET 8-K ↗
186.5000 187.9900 184.5300 186.1200 3,288,700
188.2300 189.5300 185.3000 186.6400 2,800,900
Weekend
Weekend
187.8900 190.1500 185.8600 188.5900 2,747,300
14 · 8-K After-hours · 16:22 ET 8-K ↗
189.0000 189.0300 185.0300 187.6400 3,430,400
188.5100 190.9900 187.2200 190.8000 2,457,200
187.5300 191.1800 186.2500 190.2500 2,361,100
190.0200 192.2400 188.5400 190.2000 3,390,200
Weekend
Weekend
13 · 8-K After-hours · 16:16 ET 8-K ↗
186.1600 191.9700 184.6800 191.8600 4,964,400
183.1700 187.3900 181.1800 185.0100 2,918,200
191.6000 191.6500 182.2900 182.4800 3,406,300
12 · 10-K After-hours · 16:08 ET 10-K ↗
188.1500 195.4500 187.0300 190.1900 3,535,100
11 · 8-K Pre-market · 07:05 ET 8-K ↗
187.5000 191.4900 186.6800 190.0500 2,966,400
Weekend
Weekend
186.0000 187.4200 183.4100 187.3100 2,484,100
186.5800 188.3800 184.4000 184.7900 2,257,500
192.0700 192.1800 185.6300 186.6200 2,636,100
192.5000 193.6200 189.9300 193.0900 3,166,000
No trading
Weekend
Weekend
188.6700 192.2100 188.1000 192.1000 3,413,100
182.4700 190.3400 181.8500 188.1900 4,537,000
177.5100 180.5400 175.6000 180.4800 2,089,100
174.3500 179.6700 173.5900 178.5100 2,680,700
171.0500 174.2600 169.3200 173.7100 2,507,800
Weekend
Weekend
172.7700 173.6000 168.6800 171.2700 3,481,800
172.5800 173.7200 169.3000 171.4900 4,730,000
174.1300 177.9200 172.3800 176.5500 4,518,900
173.0400 174.2300 171.4400 173.1300 3,147,200
178.9800 179.8200 173.5900 173.7000 2,968,500
Weekend
Weekend
181.2100 181.2100 175.3000 179.2800 3,504,300
10 · 8-K After-hours · 16:19 ET 8-K ↗
177.5100 181.8900 176.8100 181.3400 3,496,100
9 · 8-K After-hours · 16:22 ET 8-K ↗
180.0700 180.8800 176.2300 177.5100 3,437,700
178.5900 181.3600 177.0800 180.0700 2,867,000
179.8200 182.6400 178.9900 179.4600 4,304,100
Weekend
Weekend
176.3800 179.7000 175.1500 178.7500 2,869,700
177.2900 181.0800 176.5200 176.9500 3,741,500
178.9900 179.6800 176.6900 178.1700 2,755,700
182.9000 183.9600 177.6300 177.7500 5,038,500
No trading
Weekend
Weekend
179.6800 184.1700 178.6500 183.5700 4,130,800
177.4500 181.8100 176.3700 181.5500 3,868,300
174.4800 180.6100 174.2600 177.4800 3,604,700
171.4000 174.1200 169.7100 173.9600 2,870,300
169.4000 172.8800 169.4000 171.5300 2,732,700
Weekend
Weekend
169.4400 170.0700 166.8800 168.5100 2,359,900
168.5700 171.3200 168.3400 170.3300 2,714,700
176.9900 177.0000 169.4000 169.4400 2,756,800
175.3800 177.8000 174.7700 175.8200 2,362,300
174.2600 176.2700 171.0400 176.2500 3,433,400
Weekend
Weekend
175.2600 175.8100 173.1700 174.8000 1,786,500
No trading
175.9200 176.7600 175.4000 175.5700 1,680,100
175.6700 176.8500 175.0000 176.7200 1,718,900
175.0700 176.5100 174.8800 175.8300 2,177,300
Weekend
Weekend
174.5000 176.7000 174.5000 176.4100 1,463,200
No trading
174.7200 175.1800 174.2900 174.8000 1,040,000
172.9500 174.5800 172.1300 174.5100 3,358,100
171.6300 173.3700 170.7700 172.5300 4,154,500
Weekend
Weekend
174.2100 174.8400 171.9500 172.4100 6,033,000
178.6000 179.3600 174.1900 174.2900 3,950,800
178.5400 180.7700 177.8000 178.4900 4,084,700
180.2700 180.9800 178.7000 179.1300 3,198,300
181.7400 181.9400 177.9100 180.2600 5,020,800
Weekend
Weekend
182.1700 183.1600 180.3200 180.7000 5,329,400
181.6600 183.2100 180.7400 181.7100 4,370,000
179.8100 182.6300 179.5500 180.2600 2,500,900
183.2000 184.6100 179.3500 179.5500 3,161,100
178.5400 183.3100 176.9000 183.2000 5,804,200
Weekend
Weekend
8 · 8-K After-hours · 16:19 ET 8-K ↗
178.8200 180.3700 178.1000 178.8600 2,998,000
7 · 8-K After-hours · 16:24 ET 8-K ↗
175.5700 179.1100 175.4000 178.8300 2,804,200
6 · 424B2 After-hours · 16:17 ET 424B2 ↗
176.0300 176.7700 174.3500 176.1800 2,693,000
4 · 8-K After-hours · 16:59 ET 8-K ↗
177.0600 177.7300 175.2000 175.8100 2,467,200
5 · 424B5 Pre-market · 09:12 ET 424B5 ↗
178.5000 179.1000 174.9100 176.2700 3,329,600
Weekend
Weekend
180.4100 182.0500 180.0200 181.2700 1,088,800
No trading
180.0200 182.3000 178.5000 181.2400 1,941,700
180.2300 182.0000 179.4700 179.7600 2,005,100
179.5800 180.3600 176.5800 179.5700 6,032,500
Weekend
Weekend
180.3700 181.9900 179.0100 179.5600 2,609,900
180.5000 180.6600 178.0100 179.1200 3,094,500
181.5400 182.3600 178.9200 180.5000 2,673,200
180.0000 182.3600 178.9400 181.5500 3,436,500
183.6900 184.7000 179.9600 180.4700 3,253,600
Weekend
Weekend
182.8500 184.4000 179.6100 183.5900 3,807,200
183.0200 184.2400 180.8500 181.1300 3,072,000
184.0000 185.3800 181.9300 183.3500 2,947,600
181.4800 184.9600 180.8100 184.7900 2,429,500
176.2400 180.9700 176.0000 179.7200 2,911,100
Weekend
Weekend
177.7500 178.4800 175.3800 177.9500 4,255,800
3 · 8-K Pre-market · 08:33 ET 8-K ↗
178.8800 182.1100 177.8500 178.0900 1,960,500
180.6000 182.0300 178.7200 179.4300 2,330,500
178.6500 180.7700 177.4400 180.3500 2,663,800
177.7500 178.0200 175.0000 176.6400 3,481,700
Weekend
Weekend
177.1300 180.0600 176.8900 178.9800 2,604,700
180.2500 182.5800 178.4700 179.4500 2,954,900
182.6700 183.9200 178.7500 179.0800 4,501,500
2 · 10-Q After-hours · 16:10 ET 10-Q ↗
185.9400 186.3400 177.4900 182.7200 6,047,500
1 · 8-K Pre-market · 07:04 ET 8-K ↗
190.0000 191.0900 188.7400 189.7300 2,979,100
Weekend
Weekend
191.3100 192.7300 189.9700 191.5200 1,721,800

Announcement Events

Each title opens the filing on the SEC website. Registered users can summarise the filing and up to seven relevant exhibits linked within the same SEC submission.

35 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:50 ET Summarise
34 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:16 ET Summarise
33 424B2 424B2 (opens SEC filing in a new tab) After-hours · 16:15 ET Summarise
32 424B5 424B5 (opens SEC filing in a new tab) Pre-market · 08:58 ET Summarise
31 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:29 ET Summarise
30 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:07 ET Summarise
29 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:05 ET Summarise
28 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:39 ET Summarise
27 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:18 ET Summarise
26 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:00 ET Summarise
25 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:17 ET Summarise
24 424B2 424B2 (opens SEC filing in a new tab) After-hours · 16:11 ET Summarise
23 424B5 424B5 (opens SEC filing in a new tab) Pre-market · 06:02 ET Summarise
22 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:14 ET Summarise
21 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:38 ET Summarise
20 DEFA14A DEFA14A (opens SEC filing in a new tab) After-hours · 16:13 ET Summarise
19 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:11 ET Summarise
18 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:04 ET Summarise
17 DEFA14A DEFA14A (opens SEC filing in a new tab) Pre-market · 08:35 ET Summarise
16 DEF 14A DEF 14A (opens SEC filing in a new tab) Pre-market · 08:32 ET Summarise
15 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:24 ET Summarise
14 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:22 ET Summarise
13 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:16 ET Summarise
12 10-K 10-K (opens SEC filing in a new tab) After-hours · 16:08 ET Summarise
11 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:05 ET Summarise
10 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:19 ET Summarise
9 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:22 ET Summarise
8 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:19 ET Summarise
7 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:24 ET Summarise
6 424B2 424B2 (opens SEC filing in a new tab) After-hours · 16:17 ET Summarise
5 424B5 424B5 (opens SEC filing in a new tab) Pre-market · 09:12 ET Summarise
4 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:59 ET Summarise
3 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:33 ET Summarise
2 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:10 ET Summarise
1 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:04 ET Summarise