Ticker · CUSIP 023193105
Holders (tracked)
7
Combined shares
397,539
Combined value
$11.33M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 2.
SEC event timeline
12 events
- Ken Griffin (Citadel Advisors) exited2026-02-17−60,000 shares · 2025Q413F
- D.E. Shaw & Co. added2026-02-17+4,405 shares · 2025Q413F
- Two Sigma Investments exited2026-02-17−7,466 shares · 2025Q413F
- +62,018 shares · 2025Q413F
- +26,976 shares · 2025Q413F
- Norges Bank (Norway SWF) opened position2026-02-10+20,000 shares · 2025Q413F
- First Eagle Investment Management added2026-02-04+130,823 shares · 2025Q413F
- +59,248 shares · 2025Q313F
- +20,000 shares · 2025Q313F
- D.E. Shaw & Co. opened position2025-11-14+15,169 shares · 2025Q313F
- Two Sigma Investments opened position2025-11-14+7,466 shares · 2025Q313F
- +58,900 shares · 2025Q313F
Insider activity
No insider transactions in the last 30 days.
Who moved on this name in 2025Q4
13F transactions reported for the latest quarter, grouped by direction.
New positions3
- Izzy Englander (Millennium Mgmt)+62,018$1.8M
- Paul Tudor Jones (Tudor Investment)+26,976$769K
- Norges Bank (Norway SWF)+20,000$570K
Added to2
- First Eagle Investment Management+130,823$3.7M
- D.E. Shaw & Co.+4,405$126K
Trimmed0
—
Exited2
- Ken Griffin (Citadel Advisors)−60,000$1.8M
- Two Sigma Investments−7,466$223K
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2025Q3 | 6 | $6.6M |
| 2025Q4 | 7 | $11.3M |
Who owns AMBQ
7 super-investors · 2025Q4
Tracked stake
397.5K
shares
Combined value
$11M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New3Added2Held2
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | First Eagle Investment Management | 189.7K | $5M |
| 2 | Izzy Englander Millennium Mgmt | 62.0K | $2M |
| 3 | Lee Ainslie Maverick Capital | 59.2K | $2M |
| 4 | Paul Tudor Jones Tudor Investment | 27.0K | $769K |
| 5 | Jonathan Auerbach Hound Partners | 20.0K | $570K |
| 6 | Norges Bank Norway SWF | 20.0K | $570K |
| 7 | D.E. Shaw & Co. | 19.6K | $558K |
Recent moves
12 transactions
- −60,000 · 2025Q4
- +4,405 · 2025Q4
- −7,466 · 2025Q4
- +62,018 · 2025Q4
- +26,976 · 2025Q4
- +20,000 · 2025Q4
- +130,823 · 2025Q4
- +59,248 · 2025Q3
- +20,000 · 2025Q3
- +15,169 · 2025Q3
- +7,466 · 2025Q3
- +58,900 · 2025Q3
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