Ticker · CUSIP 02155H200
Holders (tracked)
10
Combined shares
5,657,132
Combined value
$20.42M
Last close
$3.50
Quarter
2025Q4
Price · 1Y$3.50-1.05 (-23.08%)H $7.71 · L $2.88 · Avg Vol 4.1M
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 8.
Price is -3.1% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
15 events
- Ken Griffin (Citadel Advisors) added2026-02-17+55,913 shares · 2025Q4Position
- D.E. Shaw & Co. added2026-02-17+983,188 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−160,199 shares · 2025Q4Position
- Steve Cohen (Point72) exited2026-02-17−476,926 shares · 2025Q4Position
- T. Rowe Price added2026-02-17+8,386 shares · 2025Q4Position
- Wellington Management trimmed2026-02-17−7,531 shares · 2025Q4Position
- Jeremy Grantham (GMO) opened position2026-02-17+172,559 shares · 2025Q4Position
- AQR Capital Management opened position2026-02-17+21,147 shares · 2025Q4Position
- Two Sigma Investments trimmed2026-02-17−731,165 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) added2025-11-14+289,288 shares · 2025Q3Position
- T. Rowe Price added2025-11-14+7,262 shares · 2025Q3Position
- Wellington Management added2025-11-14+12,936 shares · 2025Q3Position
- Steve Cohen (Point72) opened position2025-11-14+476,926 shares · 2025Q3Position
- Two Sigma Investments added2025-11-14+1,559,562 shares · 2025Q3Position
- D.E. Shaw & Co. added2025-11-14+309,137 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of ALT…
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 |
|---|---|---|---|---|
| Jeremy Grantham (GMO) | 2025Q4 | $3.61 | -3.0% | $604K |
| D.E. Shaw & Co. | 2018Q4 | $3.65 | -4.1% | $4.7M |
| Ken Griffin (Citadel Advisors) | 2019Q1 | $3.70 | -5.3% | $2.0M |
| Ken Griffin (Citadel Advisors) | 2019Q1 | $3.70 | -5.3% | $2.0M |
| Ken Griffin (Citadel Advisors) | 2019Q1 | $3.70 | -5.3% | $2.0M |
| Izzy Englander (Millennium Mgmt) | 2020Q2 | $3.83 | -8.7% | $726K |
| Two Sigma Investments | 2018Q4 | $4.44 | -21.2% | $4.4M |
| AQR Capital Management | 2023Q1 | $6.25 | -44.0% | $74K |
| T. Rowe Price | 2020Q3 | $6.71 | -47.8% | $175K |
| Wellington Management | 2024Q1 | $8.03 | -56.4% | $900K |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions2
- Jeremy Grantham (GMO)+172,559$623K
- AQR Capital Management+21,147$76K
Added to3
- D.E. Shaw & Co.+983,188$3.5M
- Ken Griffin (Citadel Advisors)+55,913$202K
- T. Rowe Price+8,386$30
Trimmed3
- Two Sigma Investments−731,165$2.6M
- Izzy Englander (Millennium Mgmt)−160,199$578K
- Wellington Management−7,531$27K
Exited1
- Steve Cohen (Point72)−476,926$1.8M
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 10 | $1.20B |
| 2022Q2 | 11 | $2.28B |
| 2022Q3 | 9 | $57.6M |
| 2022Q4 | 9 | $70.4M |
| 2023Q1 | 12 | $28.6M |
| 2023Q2 | 10 | $25.9M |
| 2023Q3 | 9 | $15.5M |
| 2023Q4 | 6 | $67.6M |
| 2024Q1 | 9 | $66.3M |
| 2024Q2 | 10 | $48.6M |
| 2024Q3 | 10 | $15.7M |
| 2024Q4 | 8 | $19.7M |
| 2025Q1 | 9 | $17.2M |
| 2025Q2 | 10 | $10.2M |
| 2025Q3 | 9 | $20.8M |
| 2025Q4 | 10 | $20.4M |
Who owns ALT
10 super-investors · 2025Q4
Tracked stake
5.66M
shares
Combined value
$20M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New2Added5Trim3
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | D.E. Shaw & Co. | 1.34M | $5M |
| 2 | Ken Griffin Citadel Advisors | 1.34M | $5M |
| 3 | Two Sigma Investments | 1.27M | $5M |
| 4 | Ken Griffin Citadel Advisors | 578.5K | $2M |
| 5 | Ken Griffin Citadel Advisors | 423.2K | $2M |
| 6 | Wellington Management | 257.3K | $929K |
| 7 | Izzy Englander Millennium Mgmt | 207.4K | $749K |
| 8 | Jeremy Grantham GMO | 172.6K | $623K |
| 9 | T. Rowe Price | 49.9K | $181K |
| 10 | AQR Capital Management | 21.1K | $76K |
Recent moves
20 transactions
- +55,913 · 2025Q4
- +21,147 · 2025Q4
- +8,386 · 2025Q4
- +172,559 · 2025Q4
- −731,165 · 2025Q4
- −476,926 · 2025Q4
- +983,188 · 2025Q4
- −7,531 · 2025Q4
- −160,199 · 2025Q4
- +12,936 · 2025Q3
- +289,288 · 2025Q3
- +1,559,562 · 2025Q3
- +309,137 · 2025Q3
- +476,926 · 2025Q3
- +7,262 · 2025Q3
- −710,530 · 2025Q2
- −1,033,005 · 2025Q2
- +742 · 2025Q2
- +2,753 · 2025Q2
- +26,912 · 2025Q2
Embed this chart
Paste this iframe anywhere to embed the live ALT chart.
<iframe src="https://openstocks.me/embed/stocks/ALT" width="100%" height="480" frameborder="0" loading="lazy" title="ALT chart by OpenStocks" style="border:0;border-radius:12px;background:transparent"></iframe>Explore related topics
- ALT insider tradingEvery Form 4 filing by ALT officers, directors, and 10%+ holders.
- ALT analyst target pricesWall Street consensus target, analyst-by-analyst breakdown, and revision history.
- Most popular hedge-fund stocksSee where this ticker ranks against the broader smart-money consensus.
- All insider tradingCross-ticker view of where corporate insiders are buying on the open market.
- Congress stock tradesReal-time PTR disclosures filed under the STOCK Act.
- Smart-money signalsComposite signals where institutional, insider and Congress flows converge.