Ticker · CUSIP 023193105

AMBQ

AMBIQ MICRO INC

···Share

Holders (tracked)

Combined shares

397,539

Combined value

$11.33M

Last close

$34.76

Quarter

2025Q4

Price is +22.0% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$34.76-3.77 (-9.78%)H $43.85 · L $22.76 · Avg Vol 295K

Position opened

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 · 2025Q4
Position
D.E. Shaw & Co. added2026-02-17
+4,405 shares · 2025Q4
Position
Two Sigma Investments exited2026-02-17
−7,466 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) opened position2026-02-17
+62,018 shares · 2025Q4
Position
Paul Tudor Jones (Tudor Investment) opened position2026-02-17
+26,976 shares · 2025Q4
Position
Norges Bank (Norway SWF) opened position2026-02-10
+20,000 shares · 2025Q4
Position
First Eagle Investment Management added2026-02-04
+130,823 shares · 2025Q4
Position
Lee Ainslie (Maverick Capital) opened position2025-11-14
+59,248 shares · 2025Q3
Position
Jonathan Auerbach (Hound Partners) opened position2025-11-14
+20,000 shares · 2025Q3
Position
D.E. Shaw & Co. opened position2025-11-14
+15,169 shares · 2025Q3
Position
Two Sigma Investments opened position2025-11-14
+7,466 shares · 2025Q3
Position
First Eagle Investment Management opened position2025-11-12
+58,900 shares · 2025Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for AMBQ →

Follow-the-investor returns

If you'd copied each holder of AMBQ…

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
Izzy Englander (Millennium Mgmt)	2025Q4	$28.50	+22.0%	$2.2M
Paul Tudor Jones (Tudor Investment)	2025Q4	$28.50	+22.0%	$938K
Norges Bank (Norway SWF)	2025Q4	$28.50	+22.0%	$695K
First Eagle Investment Management	2025Q3	$28.94	+20.1%	$6.6M
D.E. Shaw & Co.	2025Q3	$29.60	+17.4%	$680K
Lee Ainslie (Maverick Capital)	2025Q3	$29.92	+16.2%	$2.1M
Jonathan Auerbach (Hound Partners)	2025Q3	$29.92	+16.2%	$695K

Who moved on this name in 2025Q4

Position changes 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	Shares	Combined value	Δ holders
2025Q3	6	220,783	$6.6M	—
2025Q4	7	397,539	$11.3M	+1

Who owns AMBQ

7 super-investors · 2025Q4

Tracked stake

397.5K

Combined value

$11M

% of shares outstanding

—

shares-out unknown

Quarter action mix

New3Added2Held2

#	Manager	Shares	Value	% of book	Last action	8Q trend
1	First Eagle Investment Management	189.7K	$5M	0.0%	Added+130.8K
2	Izzy Englander Millennium Mgmt	62.0K	$2M	0.0%	New+62.0K	—
3	Lee Ainslie Maverick Capital	59.2K	$2M	0.0%	Held
4	Paul Tudor Jones Tudor Investment	27.0K	$769K	0.0%	New+27.0K	—
5	Jonathan Auerbach Hound Partners	20.0K	$570K	0.1%	Held
6	Norges Bank Norway SWF	20.0K	$570K	0.0%	New+20.0K	—
7	D.E. Shaw & Co.	19.6K	$558K	0.0%	Added+4.4K

Recent moves

12 transactions

SOLDKen Griffin (Citadel Advisors)
−60,000 · 2025Q4
ADDD.E. Shaw & Co.
+4,405 · 2025Q4
SOLDTwo Sigma Investments
−7,466 · 2025Q4
NEWIzzy Englander (Millennium Mgmt)
+62,018 · 2025Q4
NEWPaul Tudor Jones (Tudor Investment)
+26,976 · 2025Q4
NEWNorges Bank (Norway SWF)
+20,000 · 2025Q4
ADDFirst Eagle Investment Management
+130,823 · 2025Q4
NEWLee Ainslie (Maverick Capital)
+59,248 · 2025Q3
NEWJonathan Auerbach (Hound Partners)
+20,000 · 2025Q3
NEWD.E. Shaw & Co.
+15,169 · 2025Q3
NEWTwo Sigma Investments
+7,466 · 2025Q3
NEWFirst Eagle Investment Management
+58,900 · 2025Q3

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