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Disclosery

AMBQ AMBIQ MICRO INC

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COMMON STOCK (common), issuer CIK 1500412

75 managers (75 13F filers) reported a position in AMBQ shares at 2025-12-31, 4,714,305 shares in all. 16 filers opened a position and 15 filers sold out during the quarter.

Managers
75
13F filers
75
New
16
Added
27
Reduced
17
Sold out
15
Shares held by filers
4,714,305

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

The latest Form 4 transactions, non-derivative.
OwnerDateSharesPriceFiling
Chen Sean Chihhsiangofficer (President and COO)2026-10-05-100 S$69.51Form 4
Chen Sean Chihhsiangofficer (President and COO)2026-10-05-800 S$68.0757Form 4
Chen Sean Chihhsiangofficer (President and COO)2026-10-05-1,797 S$67.2861Form 4
Chen Sean Chihhsiangofficer (President and COO)2026-10-05-5,508 S$66.3808Form 4
Winzeler Jeffrey Gofficer (Chief Financial Officer)2026-10-02-284 S$71.8592Form 4
Winzeler Jeffrey Gofficer (Chief Financial Officer)2026-10-02-2,828 S$69.7722Form 4
Winzeler Jeffrey Gofficer (Chief Financial Officer)2026-10-02-2,343 S$69.1083Form 4
Esaka Fumihidedirector, officer (Chief Executive Officer)2026-10-02-862 S$71.8592Form 4
Esaka Fumihidedirector, officer (Chief Executive Officer)2026-10-02-8,585 S$69.7722Form 4
Esaka Fumihidedirector, officer (Chief Executive Officer)2026-10-02-7,113 S$69.1083Form 4
Hanson Scott McLeandirector, officer (Chief Technology Officer)2026-10-02-452 S$71.8592Form 4
Hanson Scott McLeandirector, officer (Chief Technology Officer)2026-10-02-4,500 S$69.7722Form 4
Hanson Scott McLeandirector, officer (Chief Technology Officer)2026-10-02-3,728 S$69.1083Form 4
Chen Sean Chihhsiangofficer (President and COO)2026-10-02-302 S$71.8592Form 4
Chen Sean Chihhsiangofficer (President and COO)2026-10-02-3,008 S$69.7722Form 4

13F holders, Q4 2025

Filers in the available 13F reports with a share position at 2025-12-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
Atreides Management, LP696,420$19.8M0.42%+12,11313F-HRTimeline
ALLIANCEBERNSTEIN L.P.395,371$11.3M<0.01%-40,78313F-HRTimeline
KADENSA CAPITAL Ltd394,991$11.3M1.17%013F-HRTimeline
VANGUARD GROUP INCin group VANGUARD GROUP INC328,182$9.35M<0.01%+20,34613F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.307,896$8.78M<0.01%+16,02013F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources307,887$8.77M<0.01%+295,92713F-HRTimelineGroup
Schonfeld Strategic Advisors LLC221,810$6.32M0.03%-52,27713F-HRTimeline
WASATCH ADVISORS LP217,512$6.2M0.04%+72,08613F-HRTimeline
First Eagle Investment Management, LLCin group First Eagle Investment Manage…189,723$5.41M0.01%+130,82313F-HRTimelineGroup
SILVERCREST ASSET MANAGEMENT GROUP LLC188,690$5.38M0.04%013F-HRTimeline
SOFTBANK GROUP CORP.in group SOFTBANK GROUP CORP.148,939$4.24M0.03%013F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC132,112$3.77M<0.01%+10,70913F-HR/ATimelineGroup
SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT…in group SUMMIT PARTNERS PUBLIC ASSET …123,597$3.52M0.1%+30,00013F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC104,184$2.97M<0.01%+6,15813F-HRTimelineGroup
GILDER GAGNON HOWE & CO LLC93,745$2.67M0.03%-2,00313F-HRTimeline
Monashee Investment Management LLC85,089$2.43M1.37%-114,91113F-HRTimeline
STATE STREET CORPin group STATE STREET CORP84,507$2.41M<0.01%+12,21113F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC62,018$1.77M<0.01%new13F-HRTimelineGroup
MAVERICK CAPITAL LTD59,248$1.69M0.02%013F-HRTimeline
SEVEN GRAND MANAGERS, LLC50,000$1.43M0.11%013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY39,284$1.12M<0.01%+30,57313F-HR/ATimelineGroup
PEAK6 LLCin group PEAK6 LLC35,835$1.02M0.03%-4,16413F-HR/ATimelineGroup
UBS Group AGin group UBS Group AG35,789$1.02M<0.01%-5,64113F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co33,833$964K<0.01%+2,98113F-HRTimelineGroup
Alyeska Investment Group, L.P.in group Alyeska Investment Group, L.P.32,832$936K<0.01%+14,12213F-HRTimelineGroup
TUDOR INVESTMENT CORP ET AL26,976$769K<0.01%new13F-HRTimeline
Polar Asset Management Partners Inc.26,088$744K0.01%new13F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…22,179$632K<0.01%+20,01313F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC20,456$583K<0.01%-2,17113F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP20,284$578K<0.01%-13,68513F-HRTimelineGroup
Hound Partners, LLCin group Hound Partners, LLC20,000$570K0.08%013F-HRTimelineGroup
NORGES BANK20,000$570K<0.01%new13F-HRTimeline
Ghisallo Capital Management LLC20,000$570K0.03%013F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.19,574$558K<0.01%+4,40513F-HRTimelineGroup
KORNITZER CAPITAL MANAGEMENT INC /KS17,073$487K0.01%+7313F-HRTimeline
READYSTATE ASSET MANAGEMENT LP16,596$473K0.02%-4,90413F-HRTimeline
Inspire Investing, LLCin group Inspire Investing, LLC16,141$460K0.04%+1,06513F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\15,389$439K<0.01%-4,50213F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO12,691$362K<0.01%+10,81413F-HRTimelineGroup
Walleye Capital LLCin group Walleye Capital LLC11,555$329K<0.01%013F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp10,818$308K<0.01%-23513F-HRTimelineGroup
LOS ANGELES CAPITAL MANAGEMENT LLC8,658$257K<0.01%new13F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC8,451$241K<0.01%+1,88313F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/6,559$187K<0.01%+64713F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN5,344$152K<0.01%+2,22813F-HRTimelineGroup
Quantbot Technologies LP3,865$110K<0.01%new13F-HRTimeline
RHUMBLINE ADVISERS3,408$97.1K<0.01%-57513F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND1,700$48.5K<0.01%new13F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.1,595$45.5K<0.01%-25013F-HRTimelineGroup
SBI Securities Co., Ltd.1,236$35.2K<0.01%-2,14113F-HRTimeline
CITIGROUP INCin group CITIGROUP INC1,101$31.4K<0.01%+95513F-HRTimelineGroup
Police & Firemen's Retirement System of…1,025$29.2K<0.01%013F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS989$28.2K<0.01%+4913F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA810$24K<0.01%-3,96213F-HRTimelineGroup
STRS OHIO800$22.8K<0.01%013F-HRTimeline
FMR LLCin group FMR LLC572$16.3K<0.01%+46113F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc473$13.5K<0.01%013F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…440$12.5K<0.01%-54813F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…412$11.7K<0.01%+1313F-HRTimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…389$11.1K<0.01%013F-HRTimelineGroup
Quarry LP304$8.66K<0.01%+28613F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…287$8.18K<0.01%new13F-HRTimeline
Hurley Capital, LLC200$5.7K<0.01%013F-HRTimeline
AMALGAMATED BANK146$4K<0.01%-513F-HRTimeline
Sterling Capital Management LLC135$3.85K<0.01%+1313F-HRTimeline
CWM, LLCin group CWM, LLC49$1K<0.01%new13F-HRTimelineGroup
NISA INVESTMENT ADVISORS, LLC12$342<0.01%new13F-HRTimeline
GAMMA Investing LLC11$314<0.01%new13F-HRTimeline
Rachor Investment Advisory Services, LLC9$257<0.01%13F-HRTimeline
ROTHSCHILD INVESTMENT LLC5$143<0.01%new13F-HRTimeline
Allworth Financial LP2$57<0.01%new13F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…1$29<0.01%new13F-HRTimelineGroup
Essential Partners LLC1$29<0.01%new13F-HRTimeline
IFP Advisors, Inc1$28<0.01%new13F-HRTimeline
Coston, McIsaac & Partners1$00%013F-HRTimelineValue filed as zero, left out of ratios.

Events

  • Winzeler Jeffrey G sold 5,455 AMBQ shares on 2026-10-02, Form 4 filed 2026-10-06. 0001312143-26-000013

    Accepted , ingested

  • Esaka Fumihide sold 16,560 AMBQ shares on 2026-10-02, Form 4 filed 2026-10-06. 0002078454-26-000018

    Accepted , ingested

  • Hanson Scott McLean sold 8,680 AMBQ shares on 2026-10-02, Form 4 filed 2026-10-06. 0002078339-26-000018

    Accepted , ingested

  • Chen Sean Chihhsiang sold 14,007 AMBQ shares between 2026-10-02 and 2026-10-05, Form 4 filed 2026-10-06. 0002078559-26-000014

    Accepted , ingested