Ambiq Micro, Inc.: which funds bought and sold

Institutions that bought and sold Ambiq Micro shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 147 institutions that filed 13F reports for both quarters added to or opened positions in Ambiq Micro, and 41 cut or closed them. Together they added a net 6.5M shares, +59.1% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 2.8M shares (+48.8%); index fund managers were net buyers of 1.2M shares (+42.7%). 96 opened a new position and 10 sold out entirely.

Bought, Q2 2026 147 institutions, 96 of them new holders Sold, Q2 2026 41 institutions, 10 of them sold out

Net change, all compared +6.5M shares (+59.1%)

Net change, active managers +2.8M shares (+48.8%), 40 bought, 11 sold

Buyers versus sellers

institutions compared, 192

147 bought 4 41 sold

Active managers and hedge funds 40 bought · 11 sold · +2.8M

Index fund managers 10 bought · 0 sold · +1.2M

Other institutions 97 bought · 30 sold · +2.6M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
D. E. Shaw & Co., Inc. Hedge fund	+984K New position	984K	$86.9M
Two Sigma Investments, LP Hedge fund	+615K +1671.4%	652K	$57.6M
State Street Corp Index funds	+602K +231.2%	862K	$76.1M
Blackrock, Inc. Index funds	+367K +36.3%	1.4M	$122M
Jane Street Group, LLC	+295K New position	295K	$26M
Neuberger Berman Group LLC Active manager	+272K New position	272K	$24M
Emerald Advisers, LLC	+244K New position	244K	$21.5M
HRT Financial LP	+226K New position	226K	$19.9M
Voloridge Investment Management, LLC Hedge fund	+223K New position	223K	$19.7M
Cooper Creek Partners Management LLC	+220K New position	220K	$19.4M
First Eagle Investment Management, LLC Active manager	+210K +75.1%	489K	$43.2M
Walleye Capital LLC Hedge fund	+203K +1777.0%	215K	$18.9M
BNP Paribas Financial Markets	+200K +5150.2%	204K	$18M
Renaissance Technologies LLC Hedge fund	+172K +404.1%	215K	$19M
Wellington Management Group LLP Active manager	+168K New position	168K	$14.8M
Emerald Mutual Fund Advisers Trust	+159K New position	159K	$14.1M
Bank Of America Corp	+155K +323.2%	203K	$17.9M
Morgan Stanley	+151K +479.5%	182K	$16.1M
Deutsche Bank Ag\	+142K +618.7%	165K	$14.6M
Price T Rowe Associates Inc Active manager	+142K +950.5%	157K	$13.9M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
D. E. Shaw & Co., Inc. Hedge fund	+984K New position	984K	$86.9M
Two Sigma Investments, LP Hedge fund	+615K +1671.4%	652K	$57.6M
Neuberger Berman Group LLC Active manager	+272K New position	272K	$24M
Voloridge Investment Management, LLC Hedge fund	+223K New position	223K	$19.7M
First Eagle Investment Management, LLC Active manager	+210K +75.1%	489K	$43.2M
Walleye Capital LLC Hedge fund	+203K +1777.0%	215K	$18.9M
Renaissance Technologies LLC Hedge fund	+172K +404.1%	215K	$19M
Wellington Management Group LLP Active manager	+168K New position	168K	$14.8M
Price T Rowe Associates Inc Active manager	+142K +950.5%	157K	$13.9M
Citadel Advisors LLC Hedge fund	+122K New position	122K	$10.8M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Schonfeld Strategic Advisors LLC Hedge fund	−341K −52.0%	315K	$27.9M
Franklin Resources Inc Active manager	−318K −58.7%	224K	$19.8M
T. Rowe Price Investment Management, Inc. Active manager	−261K −20.6%	1.0M	$88.9M
Polar Asset Management Partners Inc.	−201K Sold out	0	—
Wasatch Advisors LP Active manager	−173K −67.9%	82K	$7.2M
UBS Group AG	−130K −78.4%	36K	$3.2M
Monashee Investment Management LLC	−104K Sold out	0	—
Driehaus Capital Management LLC Active manager	−92K −24.1%	289K	$25.5M
Summit Partners Public Asset Management, LLC	−89K −57.1%	67K	$5.9M
Alliancebernstein L.P. Active manager	−76K −11.1%	610K	$15.5M
Roubaix Capital, LLC	−73K −57.7%	53K	$4.7M
S Squared Technology, LLC	−72K −37.3%	121K	$10.7M
Alyeska Investment Group, L.P. Hedge fund	−68K −86.8%	10K	$912,051
Lazard Asset Management LLC Active manager	−64K Sold out	0	—
Los Angeles Capital Management LLC Active manager	−57K −61.8%	35K	$3.1M
Centerbook Partners LP Hedge fund	−56K Sold out	0	—
Stifel Financial Corp	−16K −56.3%	12K	$1.1M
Inspire Investing, LLC	−13K −63.3%	7,640	$674,612
Ameriprise Financial Inc	−13K −35.2%	24K	$2.1M
Xtx Topco Ltd	−8,131 −32.7%	17K	$1.5M

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Schonfeld Strategic Advisors LLC Hedge fund	−341K −52.0%	315K	$27.9M
Franklin Resources Inc Active manager	−318K −58.7%	224K	$19.8M
T. Rowe Price Investment Management, Inc. Active manager	−261K −20.6%	1.0M	$88.9M
Wasatch Advisors LP Active manager	−173K −67.9%	82K	$7.2M
Driehaus Capital Management LLC Active manager	−92K −24.1%	289K	$25.5M
Alliancebernstein L.P. Active manager	−76K −11.1%	610K	$15.5M
Alyeska Investment Group, L.P. Hedge fund	−68K −86.8%	10K	$912,051
Lazard Asset Management LLC Active manager	−64K Sold out	0	—
Los Angeles Capital Management LLC Active manager	−57K −61.8%	35K	$3.1M
Centerbook Partners LP Hedge fund	−56K Sold out	0	—

New positions

largest by value

Institution	Shares	Value June 30, 2026
D. E. Shaw & Co., Inc.Hedge fund	984K	$86.9M
Jane Street Group, LLC	295K	$26M
Neuberger Berman Group LLCActive manager	272K	$24M
Emerald Advisers, LLC	244K	$21.5M
HRT Financial LP	226K	$19.9M
Voloridge Investment Management, LLCHedge fund	223K	$19.7M
Cooper Creek Partners Management LLC	220K	$19.4M
Wellington Management Group LLPActive manager	168K	$14.8M
Emerald Mutual Fund Advisers Trust	159K	$14.1M
Healthcare Of Ontario Pension Plan Trust Fund	126K	$11.1M

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Polar Asset Management Partners Inc.	201K	$5.1M
Monashee Investment Management LLC	104K	$2.6M
Lazard Asset Management LLCActive manager	64K	$1.6M
Centerbook Partners LPHedge fund	56K	$1.4M
Aquatic Capital Management LLC	779	$19,794
Hurley Capital, LLC	200	$5,082
Mai Capital Management	20	$509
Rachor Investment Advisory Services, LLC	13	$331
Root Financial Partners, LLC	4	$102
True Wealth Design, LLC	1	$26

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 182
Ten largest holders: 46.2%
Index fund managers: 22.1%
Active managers and hedge funds: 48.2%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	40	11	28	2	+2.8M	+48.8%
Index fund managers	10	0	1	0	+1.2M	+42.7%
Other institutions	97	30	67	8	+2.6M	+98.2%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Ambiq Micro.

Only managers that filed a holdings report for both quarters are compared (192 here). 1 other holder is left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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