Ticker · CUSIP 01881G106
Holders (tracked)
3
Combined shares
312,816
Combined value
$12.04M
Last close
$38.89
Quarter
2025Q4
Price · 1Y$38.89+4.95 (+14.59%)H $41.79 · L $33.20 · Avg Vol 258K
Tracked holders · last 8 quarters
-1 vs previous quarter over the last 8.
Price is +1.1% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
3 events
- Ken Griffin (Citadel Advisors) added2026-02-17+27,930 shares · 2025Q4Position
- Mario Gabelli (GAMCO) trimmed2026-02-05−400 shares · 2025Q4Position
- Mario Gabelli (GAMCO) trimmed2025-11-12−1,100 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of AB…
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 |
|---|---|---|---|---|
| Mario Gabelli (GAMCO) | 2016Q1 | $24.17 | +60.9% | $1.2M |
| Ken Griffin (Citadel Advisors) | 2016Q3 | $38.52 | +1.0% | $3.2M |
| Ken Griffin (Citadel Advisors) | 2016Q3 | $38.52 | +1.0% | $3.2M |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions0
—
Added to1
- Ken Griffin (Citadel Advisors)+27,930$1.1M
Trimmed1
- Mario Gabelli (GAMCO)−400$15K
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 4 | $19.0M |
| 2022Q2 | 4 | $12.4M |
| 2022Q3 | 3 | $12.6M |
| 2022Q4 | 4 | $14.8M |
| 2023Q1 | 4 | $22.7M |
| 2023Q2 | 5 | $20.4M |
| 2023Q3 | 5 | $16.8M |
| 2023Q4 | 5 | $15.7M |
| 2024Q1 | 5 | $19.8M |
| 2024Q2 | 5 | $17.4M |
| 2024Q3 | 4 | $11.8M |
| 2024Q4 | 4 | $11.5M |
| 2025Q1 | 4 | $32.5M |
| 2025Q2 | 4 | $7.1M |
| 2025Q3 | 4 | $11.5M |
| 2025Q4 | 3 | $12.0M |
Who owns AB
3 super-investors · 2025Q4
Tracked stake
312.8K
shares
Combined value
$12M
% of shares outstanding
—
shares-out unknown
Quarter action mix
Added2Trim1
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Ken Griffin Citadel Advisors | 199.1K | $8M |
| 2 | Ken Griffin Citadel Advisors | 82.0K | $3M |
| 3 | Mario Gabelli GAMCO | 31.7K | $1M |
Recent moves
20 transactions
- +27,930 · 2025Q4
- −400 · 2025Q4
- −1,100 · 2025Q3
- −38,800 · 2025Q2
- +1,350 · 2025Q1
- −200 · 2024Q4
- TRIMBlackRock−6 · 2024Q2
- −275 · 2024Q2
- −1,596 · 2024Q1
- ADDBlackRock+2 · 2024Q1
- −2,427 · 2023Q4
- −300 · 2023Q3
- −2,400 · 2023Q2
- NEWBlackRock+6 · 2023Q2
- −1,517 · 2023Q1
- +3,000 · 2022Q3
- −800 · 2022Q1
- −67,647 · 2021Q3
- +220,962 · 2021Q4
- −25,950 · 2021Q3
Embed this chart
Paste this iframe anywhere to embed the live AB chart.
<iframe src="https://openstocks.me/embed/stocks/AB" width="100%" height="480" frameborder="0" loading="lazy" title="AB chart by OpenStocks" style="border:0;border-radius:12px;background:transparent"></iframe>Explore related topics
- AB insider tradingEvery Form 4 filing by AB officers, directors, and 10%+ holders.
- AB 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.