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Disclosery

AMBQ AMBIQ MICRO INC

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COMMON STOCK (common), issuer CIK 1500412

93 managers (97 13F filers) reported a position in AMBQ shares at 2026-03-31, 10,993,196 shares in all. 32 filers opened a position and 13 filers sold out during the quarter.

Managers
93
13F filers
97
New
32
Added
48
Reduced
7
Sold out
13
Shares held by filers
10,993,196

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, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, 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
T. Rowe Price Investment Management, In…1,267,551$32.2M0.02%new13F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.1,013,161$25.7M<0.01%+705,26513F-HRTimelineGroup
VANGUARD GROUP INCgroup of 4 filers holding934,478$23.7MnewTimeline
Atreides Management, LP862,175$21.9M0.53%+165,75513F-HRTimeline
ALLIANCEBERNSTEIN L.P.686,098$19.6M0.01%+290,72713F-HRTimeline
Schonfeld Strategic Advisors LLC656,552$16.7M0.14%+434,74213F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources542,216$13.8M<0.01%+234,32913F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC413,426$10.5M<0.01%+281,31413F-HRTimelineGroup
Driehaus Capital Management LLC380,768$9.68M0.07%new13F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC297,548$7.56M<0.01%+193,36413F-HRTimelineGroup
SILVERCREST ASSET MANAGEMENT GROUP LLC282,373$7.18M0.05%+93,68313F-HRTimeline
First Eagle Investment Management, LLCin group First Eagle Investment Manage…279,073$7.09M0.01%+89,35013F-HR/ATimelineGroup
STATE STREET CORPin group STATE STREET CORP260,227$6.61M<0.01%+175,72013F-HRTimelineGroup
WASATCH ADVISORS LP254,303$6.46M0.04%+36,79113F-HRTimeline
Polar Asset Management Partners Inc.201,335$5.12M0.12%+175,24713F-HRTimeline
NEEDHAM INVESTMENT MANAGEMENT LLCin group NEEDHAM INVESTMENT MANAGEMENT…200,000$5.08M0.26%new13F-HRTimelineGroup
S SQUARED TECHNOLOGY, LLC192,773$4.9M1.85%new13F-HR/ATimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC177,556$4.51M<0.01%+115,53813F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding166,064$4.22M+130,275Timeline
SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT…in group SUMMIT PARTNERS PUBLIC ASSET …155,597$3.95M0.18%+32,00013F-HRTimelineGroup
SOFTBANK GROUP CORP.in group SOFTBANK GROUP CORP.148,939$3.78M0.03%013F-HRTimelineGroup
Roubaix Capital, LLC125,821$3.2M1.49%new13F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP110,847$2.82M<0.01%+90,56313F-HRTimelineGroup
GILDER GAGNON HOWE & CO LLC109,577$2.78M0.03%+15,83213F-HRTimeline
Monashee Investment Management LLC103,756$2.64M1.43%+18,66713F-HRTimeline
LOS ANGELES CAPITAL MANAGEMENT LLC92,584$2.35M0.01%+83,92613F-HRTimeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co81,067$2.06M<0.01%+47,23413F-HRTimelineGroup
Alyeska Investment Group, L.P.in group Alyeska Investment Group, L.P.78,305$1.99M0.01%+45,47313F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO76,519$1.81M<0.01%+63,82813F-HR/ATimelineGroup
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC64,247$1.63M<0.01%new13F-HRTimelineGroup
CenterBook Partners LP55,568$1.41M0.08%new13F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/48,033$1.22M<0.01%+41,47413F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC42,600$1.08M<0.01%new13F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp42,030$1.07M<0.01%+31,21213F-HRTimelineGroup
READYSTATE ASSET MANAGEMENT LP41,917$1.07M0.06%+25,32113F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP36,794$935K<0.01%new13F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC36,783$935K<0.01%+16,32713F-HR/ATimelineGroup
Nuveen, LLCin group TIAA35,721$908K<0.01%new13F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY31,405$798K<0.01%-7,87913F-HRTimelineGroup
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP27,695$704K<0.01%new13F-HRTimelineGroup
KORNITZER CAPITAL MANAGEMENT INC /KS26,442$672K0.01%+9,36913F-HRTimeline
Capital Asset Advisory Services LLC18,928$665K0.03%new13F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd24,854$632K0.01%new13F-HRTimelineGroup
TD Asset Management Inc23,770$604K<0.01%new13F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\23,010$585K<0.01%+7,62113F-HRTimelineGroup
HighTower Advisors, LLC21,652$550K<0.01%new13F-HRTimeline
Toronado Partners, LLC21,222$539K1.02%new13F-HRTimeline
Inspire Investing, LLCin group Inspire Investing, LLC20,806$529K0.03%+4,66513F-HRTimelineGroup
Ghisallo Capital Management LLC20,000$508K0.01%013F-HRTimeline
ESSEX INVESTMENT MANAGEMENT CO LLC19,216$488K0.08%new13F-HRTimeline
Perpetual Ltdin group Perpetual Ltd16,649$423K0.01%new13F-HRTimelineGroup
Quantbot Technologies LP15,156$385K0.02%+11,29113F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/14,936$381K<0.01%new13F-HRTimeline
RHUMBLINE ADVISERS14,037$357K<0.01%+10,62913F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA11,600$295K<0.01%+10,79013F-HRTimelineGroup
Walleye Capital LLCin group Walleye Capital LLC11,429$290K<0.01%-12613F-HR/ATimelineGroup
Quadrature Capital Ltdin group Quadrature Capital Ltd11,052$281K<0.01%new13F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…10,169$258K<0.01%new13F-HRTimelineGroup
Squarepoint Ops LLCin group Squarepoint Ops LLC8,988$228K<0.01%new13F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…8,492$216K<0.01%-13,68713F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN6,870$175K<0.01%+1,52613F-HR/ATimelineGroup
BARCLAYS PLCin group BARCLAYS PLC4,731$120K<0.01%-3,72013F-HRTimelineGroup
Police & Firemen's Retirement System of…4,581$116K<0.01%+3,55613F-HRTimeline
CITIGROUP INCin group CITIGROUP INC4,294$109K<0.01%+3,19313F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS3,889$98.8K<0.01%+2,90013F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND1,700$43.2K<0.01%013F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc1,584$40.2K<0.01%+1,11113F-HRTimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…1,482$37.7K<0.01%+1,09313F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…1,421$36.1K<0.01%+1,00913F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…1,348$34.3K<0.01%+90813F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…989$25.1K<0.01%+70213F-HRTimeline
SBI Securities Co., Ltd.831$21.1K<0.01%-40513F-HRTimeline
STRS OHIO800$20.3K<0.01%013F-HRTimeline
Aquatic Capital Management LLC779$19.8K<0.01%new13F-HRTimeline
FMR LLCin group FMR LLC763$19.4K<0.01%+19113F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.335$8.51K<0.01%-1,26013F-HRTimelineGroup
Sterling Capital Management LLC290$7.37K<0.01%+15513F-HRTimeline
Hurley Capital, LLC200$5.08K<0.01%013F-HRTimeline
Caitong International Asset Management …192$4.88K<0.01%new13F-HRTimeline
CWM, LLCin group CWM, LLC91$2.31K<0.01%+4213F-HRTimelineGroup
SIMPLEX TRADING, LLC33$838<0.01%new13F-HRTimeline
Farther Finance Advisors, LLC19$512<0.01%new13F-HRTimeline
MAI Capital Management20$509<0.01%new13F-HRTimeline
ZIONS BANCORPORATION, NATIONAL ASSOCIAT…17$432<0.01%new13F-HRTimeline
Rachor Investment Advisory Services, LLC13$331<0.01%+413F-HRTimeline
GAMMA Investing LLC11$280<0.01%013F-HRTimeline
Allworth Financial LP7$178<0.01%+513F-HRTimeline
Arax Advisory Partners5$127<0.01%new13F-HRTimeline
Root Financial Partners, LLC4$102<0.01%new13F-HRTimeline
Essential Partners LLC3$76<0.01%+213F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…2$51<0.01%+113F-HR/ATimelineGroup
True Wealth Design, LLC1$26<0.01%new13F-HRTimeline
ROTHSCHILD INVESTMENT LLC1$25<0.01%-413F-HRTimeline

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