American Tower Corporation (REIT) AMT
Open calendar →American Tower Corporation (REIT) Common Stock · Company · NYSE
USD closing-price chart (daily close from yfinance · Last year)
USD 232.35 → 166.06 · -28.5%
Numbered dotted lines mark the filtered filings under Announcement Events below.
Price & SEC Filing History 22 Jul 2025 — 23 Jul 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.
Date
Open
High
Low
Close
Volume
No data yet
163.7400
166.8200
163.4800
166.0600
2,702,101
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
38 · 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
37 · 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
36 · 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
35 · 8-K
After-hours · 16:17 ET
8-K ↗
183.2000
184.8400
181.9900
183.7800
2,929,200
34 · 424B2
After-hours · 16:11 ET
424B2 ↗
181.9600
184.0200
180.6600
184.0200
2,812,700
32 · 8-K
After-hours · 16:14 ET
8-K ↗
178.8100
184.1200
177.7000
183.0000
4,659,700
33 · 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
31 · 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
30 · DEFA14A
After-hours · 16:13 ET
DEFA14A ↗
29 · 10-Q
After-hours · 16:11 ET
10-Q ↗
176.5000
180.1800
174.2900
178.4000
4,484,600
28 · 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
27 · DEFA14A
Pre-market · 08:35 ET
DEFA14A ↗
26 · 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
25 · 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
24 · 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
23 · 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
22 · 10-K
After-hours · 16:08 ET
10-K ↗
188.1500
195.4500
187.0300
190.1900
3,535,100
21 · 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
20 · 8-K
After-hours · 16:19 ET
8-K ↗
177.5100
181.8900
176.8100
181.3400
3,496,100
19 · 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
18 · 8-K
After-hours · 16:19 ET
8-K ↗
178.8200
180.3700
178.1000
178.8600
2,998,000
17 · 8-K
After-hours · 16:24 ET
8-K ↗
175.5700
179.1100
175.4000
178.8300
2,804,200
16 · 424B2
After-hours · 16:17 ET
424B2 ↗
176.0300
176.7700
174.3500
176.1800
2,693,000
14 · 8-K
After-hours · 16:59 ET
8-K ↗
177.0600
177.7300
175.2000
175.8100
2,467,200
15 · 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
13 · 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
12 · 10-Q
After-hours · 16:10 ET
10-Q ↗
185.9400
186.3400
177.4900
182.7200
6,047,500
11 · 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
191.2700
192.2200
187.4700
190.3000
2,279,900
192.0300
193.4300
190.8700
191.1900
1,535,700
192.1500
194.4000
190.8500
192.3700
1,749,500
191.9500
193.1200
190.6200
193.0800
1,782,100
Weekend
Weekend
192.0800
192.5100
188.1600
191.2900
1,981,400
190.5700
194.0800
190.2400
191.4700
3,394,700
185.9200
190.1900
185.7600
190.0300
3,353,900
183.8100
186.5200
183.1300
186.5100
4,174,900
184.3600
186.0700
182.5000
183.2000
3,242,800
Weekend
Weekend
186.7700
187.9900
184.0100
186.6800
3,154,400
186.3000
186.5100
183.9900
185.3200
2,211,000
186.7100
188.8900
183.7700
185.5900
3,329,700
186.2600
186.9900
183.9500
186.9700
2,741,700
189.4500
189.4500
185.3300
185.5700
2,968,100
Weekend
Weekend
191.0000
192.4100
189.4600
190.2100
2,863,100
190.9500
193.2100
188.8800
191.1700
2,822,300
192.2800
194.5000
192.1100
193.3200
2,960,500
192.8900
193.8000
191.1300
192.3200
3,426,900
194.5600
195.5000
192.3100
194.5500
3,314,300
Weekend
Weekend
194.3300
195.4500
193.3800
194.2700
2,608,300
194.4300
197.4100
193.1400
193.7100
3,022,700
10 · 8-K
After-hours · 16:17 ET
8-K ↗
193.7400
195.5600
192.5500
192.9300
2,963,500
193.4200
194.7500
192.7200
194.2800
2,774,700
194.2900
196.5400
191.9500
193.2100
3,471,300
Weekend
Weekend
193.5500
194.6400
192.0900
193.3100
5,329,500
9 · 8-K
After-hours · 16:15 ET
8-K ↗
195.2300
196.4600
192.2300
193.0300
2,368,700
194.9600
199.1300
194.4300
197.2200
3,041,900
8 · 8-K
After-hours · 16:15 ET
8-K ↗
192.0000
195.1500
191.4800
194.7300
3,253,800
196.0600
196.7300
188.5500
192.5000
3,883,400
Weekend
Weekend
7 · 424B2
After-hours · 16:16 ET
424B2 ↗
195.7500
196.5500
194.5900
195.0800
3,096,400
5 · 8-K
After-hours · 17:07 ET
8-K ↗
194.3200
197.0900
193.0700
196.5500
2,277,400
6 · 424B5
Pre-market · 09:03 ET
424B5 ↗
194.0100
195.7500
193.3200
193.7600
2,539,100
193.9300
194.7800
192.0000
194.6000
3,383,900
194.3800
195.4700
189.0100
193.6400
5,376,600
Weekend
Weekend
4 · 8-K
After-hours · 16:10 ET
8-K ↗
197.0700
199.4000
196.2800
198.3200
4,126,100
197.9200
198.1900
193.0500
195.0900
3,523,700
201.4900
202.8000
195.2000
196.2600
3,630,500
202.6000
205.2200
198.7500
200.4900
2,601,200
No trading
Weekend
Weekend
203.0000
203.8600
201.6800
203.8500
2,618,100
203.2600
204.4400
201.7100
202.5600
2,978,200
207.7500
208.0300
203.2100
203.2700
3,083,500
209.1000
209.1000
204.5500
207.4500
3,538,700
211.0000
211.9200
209.9100
211.1200
1,238,900
3 · 8-K
Pre-market · 08:05 ET
8-K ↗
Weekend
Weekend
210.9000
214.7900
210.2500
211.8800
2,343,000
208.3700
211.0000
208.3700
209.7300
1,483,300
208.4900
211.1400
207.6800
209.5000
2,217,500
203.5400
206.8300
203.2300
206.6500
1,669,400
206.6000
207.0200
202.6600
203.1300
3,227,700
Weekend
Weekend
204.1900
208.2100
203.1900
206.1200
2,640,400
203.2000
204.1900
200.7900
203.4600
2,636,900
204.8800
205.3100
202.9500
204.1500
2,717,800
206.1500
206.7800
203.2200
204.6200
1,757,100
205.9300
207.8800
204.8500
206.0800
2,339,200
Weekend
Weekend
210.3300
210.8900
205.8100
206.5100
1,727,500
208.9200
211.0700
208.0000
210.0100
2,025,800
210.5000
211.5800
208.5000
208.9000
1,634,100
212.2600
212.7900
207.7800
210.0500
1,854,800
211.3600
214.3400
211.0000
212.9800
2,804,500
Weekend
Weekend
211.4100
217.3900
211.1300
212.1000
3,232,200
207.2200
209.6000
205.7100
208.3900
2,774,000
211.5600
215.0800
207.6600
208.7400
3,693,300
2 · 10-Q
After-hours · 16:10 ET
10-Q ↗
219.0000
219.0000
211.8000
214.7100
3,704,000
1 · 8-K
Pre-market · 07:03 ET
8-K ↗
227.7200
229.0700
223.3500
224.2100
2,176,300
Weekend
Weekend
230.6200
231.5500
228.2500
229.8700
1,031,300
230.7200
234.3300
228.4800
231.2400
2,034,700
230.9400
232.4700
229.5900
230.1800
1,839,700
229.5900
232.5500
227.9600
232.3500
2,274,400
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.