Ticker · CUSIP 023939101
Holders (tracked)
15
Combined shares
8,464,524
Combined value
$245.47M
Last close
$27.58
Quarter
2025Q4
Price · 1Y$27.58+8.79 (+46.78%)H $37.53 · L $18.42 · Avg Vol 2.0M
Position opened
Tracked holders · last 8 quarters
+3 vs previous quarter over the last 6.
Price is -4.9% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
22 events
- Wellington Management trimmed2026-02-17−740 shares · 2025Q4Position
- Two Sigma Investments added2026-02-17+238,863 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−579,612 shares · 2025Q4Position
- Steve Cohen (Point72) trimmed2026-02-17−685,705 shares · 2025Q4Position
- T. Rowe Price added2026-02-17+11,307 shares · 2025Q4Position
- AQR Capital Management added2026-02-17+1,286,844 shares · 2025Q4Position
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−62,385 shares · 2025Q4Position
- −29,619 shares · 2025Q4Position
- +109,303 shares · 2025Q4Position
- +18,251 shares · 2025Q4Position
- Norges Bank (Norway SWF) opened position2026-02-10+2,294,097 shares · 2025Q4Position
- Mario Gabelli (GAMCO) trimmed2026-02-05−7,782 shares · 2025Q4Position
- AQR Capital Management trimmed2025-11-14−184,998 shares · 2025Q3Position
- −17,995 shares · 2025Q3Position
- Steve Cohen (Point72) added2025-11-14+1,030,364 shares · 2025Q3Position
- Two Sigma Investments added2025-11-14+385,394 shares · 2025Q3Position
- T. Rowe Price added2025-11-14+12,028 shares · 2025Q3Position
- Wellington Management trimmed2025-11-14−41,090 shares · 2025Q3Position
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−4,025,416 shares · 2025Q3Position
- Norges Bank (Norway SWF) exited2025-11-13−2,160,728 shares · 2025Q3Position
- Jeremy Grantham (GMO) opened position2025-11-13+10,457 shares · 2025Q3Position
- Mario Gabelli (GAMCO) trimmed2025-11-12−9,027 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of AMTM…
Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.
| Investor | First in | Cost basis | Return | Position value today |
|---|---|---|---|---|
| Norges Bank (Norway SWF) | 2024Q4 | $22.30 | +23.7% | $63.3M |
| Mario Gabelli (GAMCO) | 2025Q2 | $23.61 | +16.8% | $2.5M |
| Izzy Englander (Millennium Mgmt) | 2024Q3 | $23.62 | +16.8% | $1.7M |
| Steve Cohen (Point72) | 2024Q3 | $23.68 | +16.5% | $19.2M |
| Jeremy Grantham (GMO) | 2025Q3 | $23.95 | +15.2% | $288K |
| Two Sigma Investments | 2024Q3 | $26.02 | +6.0% | $17.6M |
| T. Rowe Price | 2024Q3 | $27.18 | +1.5% | $3.6M |
| Ken Griffin (Citadel Advisors) | 2024Q3 | $27.68 | -0.4% | $8.7M |
| Ken Griffin (Citadel Advisors) | 2024Q3 | $27.68 | -0.4% | $8.7M |
| Ken Griffin (Citadel Advisors) | 2024Q3 | $27.68 | -0.4% | $8.7M |
| AQR Capital Management | 2024Q3 | $28.40 | -2.9% | $40.0M |
| George Soros (Soros Fund Mgmt) | 2024Q3 | $29.80 | -7.5% | $3.0M |
| Ruane, Cunniff & Goldfarb (Sequoia) | 2024Q3 | $32.08 | -14.0% | $66.0M |
| Ray Dalio (Bridgewater Associates) | 2024Q3 | $32.25 | -14.5% | $503K |
| Wellington Management | 2024Q3 | $32.25 | -14.5% | $523K |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions3
- Norges Bank (Norway SWF)+2,294,097$66.5M
- George Soros (Soros Fund Mgmt)+109,303$3.2M
- Ray Dalio (Bridgewater Associates)+18,251$529K
Added to3
- AQR Capital Management+1,286,844$37.3M
- Two Sigma Investments+238,863$6.9M
- T. Rowe Price+11,307$328
Trimmed6
- Steve Cohen (Point72)−685,705$19.9M
- Izzy Englander (Millennium Mgmt)−579,612$16.8M
- Ken Griffin (Citadel Advisors)−62,385$1.8M
- Ruane, Cunniff & Goldfarb (Sequoia)−29,619$859K
- Mario Gabelli (GAMCO)−7,782$226K
- Wellington Management−740$21K
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2024Q3 | 12 | $199.9M |
| 2024Q4 | 11 | $137.1M |
| 2025Q1 | 9 | $150.9M |
| 2025Q2 | 13 | $265.1M |
| 2025Q3 | 12 | $136.0M |
| 2025Q4 | 15 | $245.5M |
Who owns AMTM
15 super-investors · 2025Q4
Tracked stake
8.46M
shares
Combined value
$245M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New3Added3Trim8Held1
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Ruane, Cunniff & Goldfarb Sequoia | 2.39M | $69M |
| 2 | Norges Bank Norway SWF | 2.29M | $67M |
| 3 | AQR Capital Management | 1.45M | $42M |
| 4 | Steve Cohen Point72 | 695.3K | $20M |
| 5 | Two Sigma Investments | 638.0K | $19M |
| 6 | Ken Griffin Citadel Advisors | 316.7K | $9M |
| 7 | Ken Griffin Citadel Advisors | 179.2K | $5M |
| 8 | T. Rowe Price | 129.5K | $4M |
| 9 | George Soros Soros Fund Mgmt | 109.3K | $3M |
| 10 | Mario Gabelli GAMCO | 91.9K | $3M |
| 11 | Izzy Englander Millennium Mgmt | 61.2K | $2M |
| 12 | Ken Griffin Citadel Advisors | 55.6K | $2M |
| 13 | Wellington Management | 18.9K | $549K |
| 14 | Ray Dalio Bridgewater Associates | 18.3K | $529K |
| 15 | Jeremy Grantham GMO | 10.5K | $303K |
Recent moves
20 transactions
- −62,385 · 2025Q4
- +238,863 · 2025Q4
- −579,612 · 2025Q4
- −740 · 2025Q4
- +1,286,844 · 2025Q4
- −685,705 · 2025Q4
- +11,307 · 2025Q4
- +18,251 · 2025Q4
- +109,303 · 2025Q4
- −29,619 · 2025Q4
- +2,294,097 · 2025Q4
- −7,782 · 2025Q4
- −17,995 · 2025Q3
- −4,025,416 · 2025Q3
- +12,028 · 2025Q3
- +1,030,364 · 2025Q3
- +385,394 · 2025Q3
- −41,090 · 2025Q3
- −184,998 · 2025Q3
- −2,160,728 · 2025Q3
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