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AMBQ in the 13F filings

Ambiq Micro Inc · CUSIP 023193105

Sector · SemiconductorsTheme · AI infrastructure and semiconductors· L3VLUP-definedTheme · Semiconductors
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025
Quarter end
31 Mar 2026
the date the book describes
Filed
15 May 2026
latest of these filings; the earliest 13 May 2026
Managers listing it
11
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 2 listed it in both
Shares listed
1,929,945
combined, among listed positions
Reported value
$51m
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 10 buyers (opened or added shares) and 4 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +939,233.

Managers listing AMBQ in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

11 of 11 holders

ActionFiling
AllianceBernstein LP686,098$20munder 0.1%Added+290,72715 May 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC656,552$17m0.12%Added+434,74215 May 2026 (the filing on sec.gov)
First Eagle Investment Management LLC279,073$7.1munder 0.1%Added+89,35014 May 2026 (the filing on sec.gov)
Millennium Management LLC177,556$4.5munder 0.1%Added+115,53815 May 2026 (the filing on sec.gov)
Renaissance Technologies LLC42,600$1.1munder 0.1%Newnew14 May 2026 (the filing on sec.gov)
Two Sigma Investments LP36,794$935kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Quantbot Technologies LP15,156$385kunder 0.1%Added+11,29113 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc14,936$381kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Walleye Capital LLC11,429$290kunder 0.1%Trimmed-12613 May 2026 (the filing on sec.gov)
Squarepoint Ops LLC8,988$228kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)763$19kunder 0.1%Added+19115 May 2026 (the filing on sec.gov)

Largest increases and reductions, by shares

Q4 2025 to Q1 2026, 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 (4)

Exited (3)

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 2025 to 5 in Q2 2026

Tracked managers listing it, at least.

0246Q3 2025Q4 2025Q1 2026Q2 2026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
AMBQ by quarter
QuarterHoldersReported valueBuyersSellers
Q3 20253$12m30
Q4 20253$13m67
Q1 20262$24m104
Q2 20265$91m234

Compare with…

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

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

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 AMBQ, latest filings →Back to the 13F Explorer →