Ticker · CUSIP 007973100
Holders (tracked)
14
Combined shares
2,283,888
Combined value
$478.18M
Last close
$375.60
Quarter
2025Q4
Price · 1Y$375.60+289.01 (+333.78%)H $385.73 · L $85.84 · Avg Vol 487K
Congress buyCongress sell
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 8.
Price is +79.4% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
28 events
- DelSanto Anne2026-04-15Sold $91.3K @ $380.52Insider sell
- Wellington Management added2026-02-17+133,008 shares · 2025Q4Position
- Ken Griffin (Citadel Advisors) exited2026-02-17−4,028 shares · 2025Q4Position
- AQR Capital Management added2026-02-17+4,329 shares · 2025Q4Position
- D.E. Shaw & Co. trimmed2026-02-17−4,953 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) added2026-02-17+31,572 shares · 2025Q4Position
- Steve Cohen (Point72) added2026-02-17+98,592 shares · 2025Q4Position
- −92,844 shares · 2025Q4Position
- T. Rowe Price added2026-02-17+35,641 shares · 2025Q4Position
- +7,248 shares · 2025Q4Position
- −4,624 shares · 2025Q4Position
- Norges Bank (Norway SWF) opened position2026-02-10+589,400 shares · 2025Q4Position
- Ken Fisher (Fisher Asset Mgmt) added2026-02-09+104,661 shares · 2025Q4Position
- −17,700 shares · 2025Q4Position
- −41,638 shares · 2025Q3Position
- AQR Capital Management added2025-11-14+7,557 shares · 2025Q3Position
- Izzy Englander (Millennium Mgmt) added2025-11-14+150,736 shares · 2025Q3Position
- Steve Cohen (Point72) opened position2025-11-14+3,600 shares · 2025Q3Position
- D.E. Shaw & Co. trimmed2025-11-14−37,123 shares · 2025Q3Position
- T. Rowe Price added2025-11-14+1,778 shares · 2025Q3Position
- Wellington Management opened position2025-11-14+294,890 shares · 2025Q3Position
- Ron Baron (Baron Capital / BAMCO) added2025-11-14+18,740 shares · 2025Q3Position
- Norges Bank (Norway SWF) exited2025-11-13−443,515 shares · 2025Q3Position
- +9,473 shares · 2025Q3Position
- Renaissance Technologies exited2025-11-13−28,122 shares · 2025Q3Position
- Ken Fisher (Fisher Asset Mgmt) added2025-11-12+15,532 shares · 2025Q3Position
- −3,710 shares · 2025Q3Position
- Norges Bank (Norway SWF) added2025-11-12+126,384 shares · 2024Q3Position
Insider activity
Last 30 days
Net (open-market)
−$91.3K
Buys
0 · $0
Sells
1 · $91.3K
Unique insiders
1
| Date | Insider | Code | Shares | Price | Value |
|---|---|---|---|---|---|
| 04-15 | DelSanto Anne Insider | S | 240 | $380.52 | $91.3K |
Follow-the-investor returns
If you'd copied each holder of AEIS…
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 |
|---|---|---|---|---|
| Ron Baron (Baron Capital / BAMCO) | 2019Q4 | $84.42 | +344.9% | $112.4M |
| First Eagle Investment Management | 2021Q2 | $95.07 | +295.1% | $37.0M |
| Paul Tudor Jones (Tudor Investment) | 2016Q2 | $96.13 | +290.7% | $2.7M |
| D.E. Shaw & Co. | 2016Q1 | $100.22 | +274.8% | $601K |
| Norges Bank (Norway SWF) | 2016Q1 | $109.46 | +243.1% | $221.4M |
| Ken Fisher (Fisher Asset Mgmt) | 2016Q1 | $131.37 | +185.9% | $148.1M |
| T. Rowe Price | 2016Q1 | $136.29 | +175.6% | $26.3M |
| AQR Capital Management | 2016Q1 | $146.10 | +157.1% | $11.5M |
| Ray Dalio (Bridgewater Associates) | 2025Q3 | $170.14 | +120.8% | $1.8M |
| Izzy Englander (Millennium Mgmt) | 2016Q1 | $170.84 | +119.9% | $75.6M |
| Wellington Management | 2016Q1 | $175.50 | +114.0% | $160.7M |
| Steve Cohen (Point72) | 2020Q3 | $204.93 | +83.3% | $38.4M |
| Ken Griffin (Citadel Advisors) | 2016Q3 | $205.21 | +83.0% | $17.9M |
| Ken Griffin (Citadel Advisors) | 2016Q3 | $205.21 | +83.0% | $17.9M |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions2
- Norges Bank (Norway SWF)+589,400$123.4M
- Paul Tudor Jones (Tudor Investment)+7,248$1.5M
Added to6
- Wellington Management+133,008$27.8M
- Ken Fisher (Fisher Asset Mgmt)+104,661$21.9M
- Steve Cohen (Point72)+98,592$20.6M
- Izzy Englander (Millennium Mgmt)+31,572$6.6M
- AQR Capital Management+4,329$906K
- T. Rowe Price+35,641$7K
Trimmed4
- Ron Baron (Baron Capital / BAMCO)−92,844$19.4M
- First Eagle Investment Management−17,700$3.7M
- D.E. Shaw & Co.−4,953$1.0M
- Ray Dalio (Bridgewater Associates)−4,624$968K
Exited1
- Ken Griffin (Citadel Advisors)−4,028$685K
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 13 | $26.57B |
| 2022Q2 | 11 | $21.83B |
| 2022Q3 | 12 | $584.9M |
| 2022Q4 | 15 | $696.6M |
| 2023Q1 | 15 | $739.4M |
| 2023Q2 | 14 | $841.7M |
| 2023Q3 | 16 | $792.7M |
| 2023Q4 | 12 | $812.7M |
| 2024Q1 | 14 | $788.3M |
| 2024Q2 | 14 | $815.9M |
| 2024Q3 | 12 | $192.0M |
| 2024Q4 | 10 | $184.5M |
| 2025Q1 | 12 | $80.2M |
| 2025Q2 | 13 | $198.0M |
| 2025Q3 | 13 | $243.0M |
| 2025Q4 | 14 | $478.2M |
Congress members trading this stock
| Date | Member | Type | Amount range | Filing |
|---|---|---|---|---|
| 2026-03-27 | Gilbert Cisneros | Sell (P) | $1K – $15K | PDF ↗ |
| 2026-03-03 | Gilbert Cisneros | Buy | $1K – $15K | PDF ↗ |
| 2026-01-20 | Gilbert Cisneros | Buy | $1K – $15K | PDF ↗ |
| 2025-04-17 | Josh Gottheimer | Sell | $1K – $15K | PDF ↗ |
Who owns AEIS
14 super-investors · 2025Q4
Tracked stake
2.28M
shares
Combined value
$478M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New2Added6Trim4Sold2
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Norges Bank Norway SWF | 589.4K | $123M |
| 2 | Wellington Management | 427.9K | $90M |
| 3 | Ken Fisher Fisher Asset Mgmt | 394.2K | $83M |
| 4 | Ron Baron Baron Capital / BAMCO | 299.1K | $63M |
| 5 | Izzy Englander Millennium Mgmt | 201.4K | $42M |
| 6 | Steve Cohen Point72 | 102.2K | $21M |
| 7 | First Eagle Investment Management | 98.5K | $21M |
| 8 | T. Rowe Price | 70.1K | $15M |
| 9 | Ken Griffin Citadel Advisors | 47.7K | $10M |
| 10 | AQR Capital Management | 30.6K | $6M |
| 11 | Ken Griffin Citadel Advisors | 9.1K | $2M |
| 12 | Paul Tudor Jones Tudor Investment | 7.2K | $2M |
| 13 | Ray Dalio Bridgewater Associates | 4.8K | $1M |
| 14 | D.E. Shaw & Co. | 1.6K | $335K |
Recent moves
20 transactions
- +4,329 · 2025Q4
- +133,008 · 2025Q4
- TRIMD.E. Shaw & Co.−4,953 · 2025Q4
- −4,028 · 2025Q4
- −92,844 · 2025Q4
- +98,592 · 2025Q4
- +35,641 · 2025Q4
- +7,248 · 2025Q4
- +31,572 · 2025Q4
- −4,624 · 2025Q4
- +589,400 · 2025Q4
- +104,661 · 2025Q4
- −17,700 · 2025Q4
- −41,638 · 2025Q3
- +294,890 · 2025Q3
- +3,600 · 2025Q3
- TRIMD.E. Shaw & Co.−37,123 · 2025Q3
- +150,736 · 2025Q3
- +1,778 · 2025Q3
- +18,740 · 2025Q3
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