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AMBA in the 13F filings

Ambarella Inc · CUSIP G037AX101

Sector · SemiconductorsTheme · AI infrastructure and semiconductors· L3VLUP-definedTheme · Semiconductors
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
30 Sep 2025
the date the book describes
Filed
14 Nov 2025
latest of these filings; the earliest 31 Oct 2025
Managers listing it
2
at least, of 95 tracked, among listed positions
Comparable managers
95
filed both Q2 2025 and Q3 2025; 2 listed it in both
Shares listed
736,932
combined, among listed positions
Reported value
$61m
combined, at the quarter end

Among the 95 comparable managers: 1 buyer (opened or added shares) and 2 sellers (trimmed or exited), at least, among listed positions. Their net change in shares is not known from listed positions, because at least one of them lists it in only one of the two quarters.

Managers listing AMBA in Q3 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q2 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

2 of 2 holders

ActionFiling
Squarepoint Ops LLC586,972$48munder 0.1%Added+29,80014 Nov 2025 (the filing on sec.gov)
Acadian Asset Management LLC149,960$12munder 0.1%Trimmed-75,82713 Nov 2025 (the filing on sec.gov)

Largest increases and reductions, by shares

Q2 2025 to Q3 2025, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (0)

No new position among listed positions.

Exited (1)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
3 in Q3 2024 to 3 in Q2 2026

Tracked managers listing it, at least.

0510152014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
AMBA by quarter
QuarterHoldersReported valueBuyersSellers
Q3 20132$4.4mn.a.n.a.
Q1 20141$2.8mn.a.n.a.
Q2 20143$16mn.a.n.a.
Q3 20141$8.3mn.a.n.a.
Q4 20141$235kn.a.n.a.
Q1 20156$91mn.a.n.a.
Q2 20154$190mn.a.n.a.
Q3 20155$69mn.a.n.a.
Q4 20154$64mn.a.n.a.
Q1 20165$67mn.a.n.a.
Q2 20162$63mn.a.n.a.
Q3 20164$140mn.a.n.a.
Q4 20166$83mn.a.n.a.
Q1 20173$12mn.a.n.a.
Q2 20173$12mn.a.n.a.
Q3 20173$27mn.a.n.a.
Q4 20176$101mn.a.n.a.
Q1 20182$35mn.a.n.a.
Q2 20183$32mn.a.n.a.
Q3 20185$39mn.a.n.a.
Q4 20183$32mn.a.n.a.
Q1 20193$40mn.a.n.a.
Q2 20195$42mn.a.n.a.
Q3 201914$196mn.a.n.a.
Q4 20199$196mn.a.n.a.
Q1 20208$195mn.a.n.a.
Q2 20208$144mn.a.n.a.
Q3 202012$258mn.a.n.a.
Q4 202012$382mn.a.n.a.
Q1 202113$312mn.a.n.a.
Q2 202110$312mn.a.n.a.
Q3 202112$597mn.a.n.a.
Q4 202114$914mn.a.n.a.
Q1 20228$365mn.a.n.a.
Q2 20228$194mn.a.n.a.
Q3 20229$196mn.a.n.a.
Q4 202210$335mn.a.n.a.
Q1 20239$269mn.a.n.a.
Q2 20238$308mn.a.n.a.
Q3 202311$277mn.a.n.a.
Q4 20239$249m39
Q1 20248$93m44
Q2 202411$149m48
Q3 20243$99m21
Q4 20246$258m51
Q1 20253$43m12
Q2 20255$82m41
Q3 20252$61m12
Q4 20253$118m1611
Q1 20262$29m1812
Q2 20263$230m818

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

AMBA and NVDA →AMBA and AVGO →AMBA and MU →Choose a stock to compare with AMBA →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own AMBA, latest filings →Back to the 13F Explorer →