AMERICAN TOWER CORP /MA/ (AMT)
Every FINRA and SEC series the site collects for AMERICAN TOWER CORP /MA/: short interest with days to cover, daily short sale volume, fails to deliver and Form 4 insider trades. Listed on NYSE, classified by the SEC as real estate investment trusts.
7.0M
Short interest
settlement 2026-08-14
3.0
Days to cover
-7.5% vs prior
42.7%
Short share of volume
2026-09-11
1,493
Fails to deliver
settlement 2026-08-14
-$703K
Insider flow, 90 days
1 buys, 3 sells
As of 2026-09-11.
Short interest
FINRA, twice a month; the last 12 months shown, all 48 settlements in the JSONAs of 14 August 2026, short interest in AMT is 7,032,065 shares, down 608,216 shares over the last month. Over the last 48 readings it ranged from 3,614,819 shares (30 September 2024) to 9,063,793 shares (29 May 2026). At the reported average volume of 2.4M shares a day that is 3.0 days to cover.
Embed this chartfree, with the attribution line it carries
<iframe src="https://xoomar.com/embed/stocks/amt" width="100%" height="440" style="border:0;max-width:100%" loading="lazy" title="XOOMAR chart"></iframe>
| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-08-14 | 7,032,065 | -7.5% | 2,364,087 | 2.97 |
| 2026-07-31 | 7,601,720 | -0.5% | 3,458,704 | 2.20 |
| 2026-07-15 | 7,640,281 | -0.2% | 3,083,594 | 2.48 |
| 2026-06-30 | 7,656,891 | -14.5% | 3,993,208 | 1.92 |
| 2026-06-15 | 8,952,567 | -1.2% | 3,243,947 | 2.76 |
| 2026-05-29 | 9,063,793 | +0.9% | 3,110,003 | 2.91 |
| 2026-05-15 | 8,986,581 | +11.7% | 2,790,554 | 3.22 |
| 2026-04-30 | 8,044,843 | +17.6% | 3,095,373 | 2.60 |
| 2026-04-15 | 6,841,061 | -2.0% | 3,060,274 | 2.24 |
| 2026-03-31 | 6,981,335 | +6.8% | 3,712,926 | 1.88 |
| 2026-03-13 | 6,536,992 | +3.7% | 2,832,962 | 2.31 |
| 2026-02-27 | 6,301,990 | -6.6% | 3,148,357 | 2.00 |
| 2026-02-13 | 6,744,851 | +13.8% | 3,407,523 | 1.98 |
| 2026-01-30 | 5,928,746 | -10.4% | 3,614,678 | 1.64 |
| 2026-01-15 | 6,615,588 | +3.7% | 2,849,029 | 2.32 |
| 2025-12-31 | 6,378,028 | +5.0% | 2,987,213 | 2.14 |
| 2025-12-15 | 6,074,387 | +1.3% | 3,679,959 | 1.65 |
| 2025-11-28 | 5,998,677 | +2.3% | 2,904,038 | 2.07 |
| 2025-11-14 | 5,864,326 | +18.5% | 2,986,032 | 1.96 |
| 2025-10-31 | 4,948,438 | +0.8% | 2,794,501 | 1.77 |
| 2025-10-15 | 4,906,974 | +6.4% | 3,074,870 | 1.60 |
| 2025-09-30 | 4,610,775 | -17.3% | 3,234,233 | 1.43 |
| 2025-09-15 | 5,577,255 | -3.2% | 3,443,976 | 1.62 |
| 2025-08-29 | 5,760,876 | +6.5% | 2,439,916 | 2.36 |
Daily short volume
FINRA Reg SHO, last 60 sessions. JSONAs of 11 September 2026, the short share of AMT volume is 42.7%, up 4.9 points over the last five sessions. Over the last 52 readings it ranged from 13.1% (8 July 2026) to 49.4% (10 August 2026). The latest reading is 5.6 points above the 30-session average of 37.1%, on 779K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-09-11 | 333K | 779K | 42.7% | 232 |
| 2026-09-10 | 320K | 857K | 37.3% | 165 |
| 2026-09-09 | 269K | 591K | 45.5% | 367 |
| 2026-09-08 | 266K | 583K | 45.6% | 922 |
| 2026-09-04 | 366K | 778K | 47.1% | 452 |
| 2026-09-03 | 245K | 647K | 37.8% | 938 |
| 2026-09-02 | 271K | 941K | 28.8% | 403 |
| 2026-09-01 | 308K | 712K | 43.3% | 660 |
| 2026-08-31 | 203K | 563K | 36.1% | 60 |
| 2026-08-28 | 147K | 580K | 25.4% | 151 |
| 2026-08-27 | 234K | 551K | 42.4% | 131 |
| 2026-08-26 | 263K | 649K | 40.6% | 428 |
| 2026-08-25 | 163K | 544K | 30.0% | 4,840 |
| 2026-08-24 | 211K | 602K | 35.0% | 965 |
| 2026-08-21 | 161K | 497K | 32.4% | 6,034 |
| 2026-08-20 | 240K | 633K | 38.0% | 1,936 |
| 2026-08-19 | 251K | 538K | 46.7% | 6 |
| 2026-08-18 | 218K | 609K | 35.8% | 405 |
| 2026-08-17 | 194K | 849K | 22.8% | 4 |
| 2026-08-14 | 284K | 657K | 43.1% | 8 |
| 2026-08-13 | 198K | 530K | 37.3% | 157 |
| 2026-08-12 | 255K | 676K | 37.8% | 4,963 |
| 2026-08-11 | 248K | 622K | 40.0% | 539 |
| 2026-08-10 | 376K | 760K | 49.4% | 0 |
| 2026-08-07 | 199K | 639K | 31.1% | 143 |
| 2026-08-06 | 316K | 930K | 34.0% | 0 |
| 2026-08-05 | 641K | 2.1M | 30.5% | 0 |
| 2026-08-04 | 287K | 1.0M | 28.1% | 2,844 |
| 2026-08-03 | 341K | 1.0M | 33.0% | 707 |
| 2026-07-31 | 493K | 1.3M | 36.5% | 438 |
Fails to deliver
SEC, by settlement date. JSONAs of 14 August 2026, the fails-to-deliver balance in AMT is 1,493 shares, down 6,396 shares over the last settlement date. Over the last 52 readings it ranged from 1 share (18 March 2026) to 36,438 shares (6 August 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-08-14 | 1,493 | $174.19 | $260K |
| 2026-08-12 | 7,889 | $169.55 | $1.3M |
| 2026-08-10 | 4,168 | $172.54 | $719K |
| 2026-08-06 | 36,438 | $168.07 | $6.1M |
| 2026-08-04 | 5,042 | $173.00 | $872K |
| 2026-08-03 | 13,391 | $173.36 | $2.3M |
| 2026-07-31 | 184 | $174.46 | $32K |
| 2026-07-30 | 1,409 | $179.26 | $253K |
| 2026-07-29 | 411 | $171.50 | $70K |
| 2026-07-28 | 26,600 | $166.74 | $4.4M |
| 2026-07-27 | 11,885 | $166.67 | $2.0M |
| 2026-07-24 | 1,757 | $164.65 | $289K |
| 2026-07-23 | 19 | $166.06 | $3K |
| 2026-07-22 | 495 | $163.39 | $81K |
| 2026-07-16 | 1,032 | $168.63 | $174K |
| 2026-07-13 | 43 | $168.59 | $7K |
| 2026-07-10 | 600 | $165.00 | $99K |
| 2026-06-29 | 186 | $175.59 | $33K |
| 2026-06-26 | 45 | $168.72 | $8K |
| 2026-06-25 | 47 | $174.46 | $8K |
| 2026-06-24 | 8 | $179.38 | $1K |
| 2026-06-18 | 408 | $181.09 | $74K |
| 2026-06-15 | 536 | $187.18 | $100K |
| 2026-06-11 | 2,489 | $192.50 | $479K |
| 2026-06-05 | 16,087 | $193.91 | $3.1M |
| 2026-06-02 | 1,055 | $187.53 | $198K |
| 2026-04-24 | 1,371 | $179.01 | $245K |
| 2026-04-22 | 496 | $174.76 | $87K |
| 2026-04-21 | 718 | $181.66 | $130K |
| 2026-04-20 | 103 | $182.36 | $19K |
Insider trades
SEC Form 4, newest first, 50 of 65 shown. JSONOver the last 90 days AMT insiders reported 1 open-market buy ($501K) against 3 sells ($1.2M), so the dollar flow leans toward selling. Latest filing: Kalathur Rajesh on 2026-08-21.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-08-21 | Kalathur Rajesh | n/a | Buy | 3K | $177.00 | $501K | 8K |
| 2026-07-29 | Meyer Robert Joseph | SVP & Advisor to the CFO | Sell | 5K | $178.89 | $894K | 21K |
| 2026-07-29 | Dowling Ruth T | EVP, Chief Admin Ofr, GC & Sec | Sell | 1K | $174.96 | $194K | 28K |
| 2026-07-28 | Dowling Ruth T | EVP, Chief Admin Ofr, GC & Sec | Sell | 685 | $169.54 | $116K | 29K |
| 2026-06-01 | Meyer Robert Joseph | SVP & Advisor to the CFO | Tax withholding | 153 | $187.53 | $29K | 26K |
| 2026-05-28 | REEVE PAMELA D A | n/a | Gift | 810 | $0.00 | $0 | 21K |
| 2026-04-29 | Dowling Ruth T | EVP, Chief Admin Ofr, GC & Sec | Sell | 416 | $177.54 | $74K | 29K |
| 2026-04-28 | Dowling Ruth T | EVP, Chief Admin Ofr, GC & Sec | Sell | 556 | $178.48 | $99K | 30K |
| 2026-03-11 | Rossi Richard C | EVP & President, U.S. Tower | Tax withholding | 684 | $182.85 | $125K | 18K |
| 2026-03-11 | Font Juan | SVP, Pres. & CEO, CoreSite | Tax withholding | 928 | $182.85 | $170K | 28K |
| 2026-03-11 | Smith Rodney M | EVP, CFO & Treasurer | Tax withholding | 1K | $182.85 | $237K | 93K |
| 2026-03-11 | Meyer Robert Joseph | SVP & Chief Accounting Officer | Tax withholding | 684 | $182.85 | $125K | 26K |
| 2026-03-11 | Dowling Ruth T | EVP, Chief Admin Ofr, GC & Sec | Tax withholding | 863 | $182.85 | $158K | 30K |
| 2026-03-11 | Noel Eugene M | EVP & Chief Operating Officer | Tax withholding | 719 | $182.85 | $131K | 35K |
| 2026-03-11 | Vondran Steven O | President and CEO | Tax withholding | 2K | $182.85 | $395K | 109K |
| 2026-03-10 | Rossi Richard C | EVP & President, U.S. Tower | Tax withholding | 2K | $186.12 | $287K | 18K |
| 2026-03-10 | Rossi Richard C | EVP & President, U.S. Tower | Grant | 6K | $0.00 | $0 | 20K |
| 2026-03-10 | Font Juan | SVP, Pres. & CEO, CoreSite | Tax withholding | 2K | $186.12 | $341K | 29K |
| 2026-03-10 | Font Juan | SVP, Pres. & CEO, CoreSite | Grant | 8K | $0.00 | $0 | 31K |
| 2026-03-10 | Smith Rodney M | EVP, CFO & Treasurer | Tax withholding | 12K | $186.12 | $2.3M | 94K |
| 2026-03-10 | Smith Rodney M | EVP, CFO & Treasurer | Grant | 11K | $0.00 | $0 | 106K |
| 2026-03-10 | Meyer Robert Joseph | SVP & Chief Accounting Officer | Tax withholding | 1K | $186.12 | $255K | 27K |
| 2026-03-10 | Meyer Robert Joseph | SVP & Chief Accounting Officer | Grant | 4K | $0.00 | $0 | 28K |
| 2026-03-10 | Dowling Ruth T | EVP, Chief Admin Ofr, GC & Sec | Tax withholding | 7K | $186.12 | $1.2M | 31K |
| 2026-03-10 | Dowling Ruth T | EVP, Chief Admin Ofr, GC & Sec | Grant | 7K | $0.00 | $0 | 38K |
| 2026-03-10 | Noel Eugene M | EVP & Chief Operating Officer | Tax withholding | 2K | $186.12 | $465K | 35K |
| 2026-03-10 | Noel Eugene M | EVP & Chief Operating Officer | Grant | 8K | $0.00 | $0 | 38K |
| 2026-03-10 | Vondran Steven O | President and CEO | Tax withholding | 15K | $186.12 | $2.8M | 111K |
| 2026-03-10 | Vondran Steven O | President and CEO | Grant | 21K | $0.00 | $0 | 126K |
| 2026-03-10 | Chambliss Kelly C | n/a | Grant | 1K | $0.00 | $0 | 4K |
| 2026-03-10 | MACNAB CRAIG | n/a | Grant | 1K | $0.00 | $0 | 15K |
| 2026-03-10 | Kalathur Rajesh | n/a | Buy | 3K | $185.30 | $495K | 5K |
| 2026-03-10 | Kalathur Rajesh | n/a | Grant | 1K | $0.00 | $0 | 2K |
| 2026-03-10 | HORMATS ROBERT D | n/a | Grant | 1K | $0.00 | $0 | 10K |
| 2026-03-10 | Clarke Teresa Hillary | n/a | Grant | 1K | $0.00 | $0 | 5K |
| 2026-03-10 | REEVE PAMELA D A | n/a | Grant | 1K | $0.00 | $0 | 22K |
| 2026-03-10 | Ray Neville R | n/a | Grant | 1K | $0.00 | $0 | 2K |
| 2026-03-10 | REILLY EUGENE F | n/a | Grant | 1K | $0.00 | $0 | 7K |
| 2026-03-10 | Tanner Bruce L | n/a | Grant | 1K | $0.00 | $0 | 7K |
| 2026-03-10 | Lieblein Grace | n/a | Grant | 1K | $0.00 | $0 | 9K |
| 2026-03-10 | Frank Kenneth R | n/a | Grant | 1K | $0.00 | $0 | 6K |
| 2026-03-04 | Vondran Steven O | President and CEO | Sell | 2K | $189.82 | $337K | 105K |
| 2026-03-04 | Vondran Steven O | President and CEO | Sell | 17K | $188.82 | $3.1M | 107K |
| 2026-03-04 | Vondran Steven O | President and CEO | Sell | 15K | $187.90 | $2.8M | 124K |
| 2026-03-04 | Vondran Steven O | President and CEO | Option exercise | 33K | $94.71 | $3.2M | 139K |
| 2026-03-04 | Dowling Ruth T | EVP, Chief Admin Ofr, GC & Sec | Sell | 682 | $188.51 | $129K | 31K |
| 2026-03-02 | Noel Eugene M | EVP & Chief Operating Officer | Sell | 7K | $192.03 | $1.3M | 30K |
| 2026-03-02 | Noel Eugene M | EVP & Chief Operating Officer | Sell | 22K | $191.40 | $4.1M | 37K |
| 2026-03-02 | Noel Eugene M | EVP & Chief Operating Officer | Sell | 7K | $190.29 | $1.4M | 58K |
| 2026-03-02 | Noel Eugene M | EVP & Chief Operating Officer | Sell | 5K | $189.36 | $993K | 66K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are the rarer, stronger signal.
Planned sales (Form 144)
Newest first. JSON2 Form 144 notices on file for AMT worth $1.2M at the prices reported; 2 in the last 90 days worth $1.2M. Latest: ROBERT MEYER filed on 2026-07-29 to sell 5,000 shares ($894K) from 2026-07-29.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-07-29 | ROBERT MEYEROfficer | 5K | $894K | 0.001% | 2026-07-29 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-28 | RUTH T DOWLINGOfficer | 2K | $299K | 0.000% | 2026-07-28 | Morgan Stanley Smith Barney LLC Executive Financial Services |
13F holders
Tracked managers holding AMT at their latest 13F. JSON8 of the 30 tracked managers held AMT at their latest 13F, $1.61B in total at quarter-end prices. AQR Capital Management is the largest at $402.4M (0.1% of its portfolio) as of 2026-06-30. Over the prior quarter 2 added shares and 5 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| AQR Capital Management | 2026-06-30 | 2.5M | $402.4M | 0.14% | +1.9M |
| Millennium Management | 2026-06-30 | 2.2M | $366.1M | 0.13% | new or n/a |
| Citadel Advisors | 2026-06-30 | 2.0M | $324.7M | 0.04% | +375K |
| D. E. Shaw & Co. | 2026-06-30 | 1.0M | $168.2M | 0.08% | -128K |
| Point72 Asset Management | 2026-06-30 | 856K | $140.1M | 0.15% | -468K |
| Fisher Asset Management | 2026-06-30 | 829K | $135.5M | 0.04% | -908K |
| Two Sigma Investments | 2026-06-30 | 432K | $70.6M | 0.05% | -798K |
| Bridgewater Associates | 2026-06-30 | 36K | $5.9M | 0.02% | -21K |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
Financials
SEC XBRL, as filed. JSONIn Q2 2026 (quarter ended 2026-06-30) AMERICAN TOWER CORP /MA/ reported revenue of $211.1M, down 13.4% from the same quarter a year earlier (1.86 diluted EPS). In FY 2025 it generated $5.46B of operating cash flow and spent $364.6M on buybacks and $3.18B on dividends.
- Cash
- $1.76B
- Equity
- $3.72B
- Total assets
- $63.30B
- Shares outstanding
- 465,960,048
Quarterly, last 8 quarters
| Quarter | Period end | Revenue | Net income | Margin | Diluted EPS |
|---|---|---|---|---|---|
| Q2 2026 | 2026-06-30 | $211.1M | n/a | n/a | 1.86 |
| Q1 2026 | 2026-03-31 | $216.1M | n/a | n/a | 1.84 |
| Q4 2025derived | 2025-12-31 | $219.8M | n/a | n/a | n/a |
| Q3 2025 | 2025-09-30 | $246.4M | n/a | n/a | 1.82 |
| Q2 2025 | 2025-06-30 | $243.7M | n/a | n/a | 0.78 |
| Q1 2025 | 2025-03-31 | $226.0M | n/a | n/a | 1.04 |
| Q4 2024 | 2024-12-31 | $2.55B | n/a | n/a | 2.62 |
| Q3 2024 | 2024-09-30 | $190.4M | n/a | n/a | -1.69 |
Fiscal years, with buybacks and dividends
| Fiscal year | Ends | Revenue | Net income | Operating cash flow | Capex | Buybacks | Dividends |
|---|---|---|---|---|---|---|---|
| FY 2025 | 2025-12-31 | $935.9M | n/a | $5.46B | $1.68B | $364.6M | $3.18B |
| FY 2024 | 2024-12-31 | $774.6M | n/a | $5.29B | $1.59B | $0 | $3.03B |
| FY 2023 | 2023-12-31 | $747.3M | n/a | $4.72B | $1.80B | $0 | $3.01B |
| FY 2022 | 2022-12-31 | $840.7M | n/a | $3.70B | $1.87B | $18.8M | $2.72B |
| FY 2021 | 2021-12-31 | $717.2M | n/a | $4.82B | $1.38B | $0 | $2.27B |
Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are cash paid to repurchase common stock in the year (XBRL PaymentsForRepurchaseOfCommonStock), not authorizations. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2026-07-21 from the cover page.
What this page is
AMERICAN TOWER CORP /MA/ in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page pulls every series the site collects for one ticker onto one URL, keyed by the SEC's own ticker list, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a summary sentence built from the rows (last value, change, range with dates) and its own JSON and CSV links. Nothing on the page is written by a model; the sentences change only when the data does. A page exists only for companies with data in at least two series, and every section says when its source last updated.
This page follows AMERICAN TOWER CORP /MA/ (AMT), SEC CIK 1053507, listed on NYSE, classified by the SEC as real estate investment trusts. The cross-market tables live on the short interest and insider transactions hubs.
Source and method
- Short interest
- FINRA consolidated short interestTwice a month, about eight business days after settlement. Latest 2026-08-14.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesEvery trading day, loaded the following morning. Latest 2026-09-11.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataTwice a month, a few weeks after the half month ends. Latest 2026-08-14.JSON and CSV
- Planned sales
- SEC EDGAR Form 144EDGAR read every 30 minutes; a notice is filed on or before the sell order. Latest 2026-07-29.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRQuarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Financials
- SEC XBRL company factsRefreshed weekly from the SEC's structured data; values are as filed in the 10-Q and 10-K. Latest 2026-06-30.JSON and CSV
- Insider trades
- SEC EDGAR Form 4EDGAR read every 30 minutes; filings are due two business days after the trade. Latest 2026-08-21.JSON and CSV
- Company record
- EDGAR filing index for CIK 1053507Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 30 requests a minute without a key, 120 a minute with a key from a free account.
Data checks. Every dataset is checked against its source once a day. This dataset passed the last run, 13 Sep 05:40 UTC.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a crowded short are the combination that has historically preceded squeezes; insider sells next to a crowded short are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
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Datasets
Frequently Asked Questions
How much of AMT is sold short?
What is AMT's daily short volume?
Does AMT have fails to deliver?
Are AMT insiders buying or selling?
Have AMT insiders filed to sell?
What did AMT report last quarter?
Which funds hold AMT?
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.