Comparable stake leader
Kleiner Perkins Caufield & Byers XVI, LLC
SEC ownership of Ambiq Micro, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001500412.
Disclosed value leader
Kleiner Perkins Caufield & Byers XVI, LLC
Comparable rows
50/50
Latest evidence
27 May 2026
- Public ticker
- AMBQ on NYSE
- Parsed ownership sources
- 13D/G, 13F, and 3/4/5
- Largest SEC-reported holder
- Kleiner Perkins Caufield & Byers XVI, LLC
- Latest 13D/G holder
- Kleiner Perkins Caufield & Byers XVI, LLC
- Latest parsed ownership date
- 27 May 2026
- Issuer CIK
- 0001500412
- Issuer location
- Austin, TX
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Ambiq Micro, Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Kleiner Perkins Caufield ...
Disclosed value leader
Kleiner Perkins Caufield ...
Comparable rows
50/50
Latest evidence
27 May 2026
13D/G
13F
3/4/5
Lead comparable stake: 8.2%
13D/G row: Kleiner Perkins Caufield & Byers XVI, LLC
Showing 1-8 of 50 holder rows.
Quick read
Kleiner Perkins Caufield & Byers XVI, LLC leads the comparable SEC ownership view at 8.2%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Kleiner Perkins Caufield & Byers XVI, LLC's linked filing trail.
Comparable ownership
Top 5
Kleiner Perkins Caufield & Byers ...
8.2%
T. Rowe Price Investment Manageme...
6%
Wen Hsuan Hsieh
3%
Michele Kim Connors
0.29%
Joseph A. Tautges
0.23%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Kleiner Perkins Caufield & Byers XVI, LLC |
13D/G
KPCB XVI Associates, LLC
|
8.2%
|
$44,549,354
1,488,949 shares
|
$0 | 30 Sep 2025 |
| T. Rowe Price Investment Management, Inc. |
13D/G
13F
Company
|
6%
|
$36,530,820
1,267,551 shares
|
$0 | 31 Mar 2026 |
| Wen Hsuan Hsieh |
3/4/5
Director
|
3%
|
$7,987,392
633,920 shares
|
— | 18 Feb 2026 |
| Michele Kim Connors |
3/4/5
General Counsel
|
0.29%
|
$1,613,818
60,554 shares
|
-$21,210 | 02 Apr 2026 |
| Joseph A. Tautges |
3/4/5
Director
|
0.23%
|
$1,511,126
48,746 shares
|
-$241,800 | 26 Jan 2026 |
| Timothy Chen |
3/4/5
Director
|
0.23%
|
$1,209,973
47,618 shares
|
— | 27 May 2026 |
| BlackRock, Inc. |
13F
Company
|
4.8%
|
$25,744,421
1,013,161 shares
|
— | 31 Mar 2026 |
| Atreides Management, LP |
13F
Company
|
4.1%
|
$21,907,867
862,175 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$11,245,077.
Buys
$0
Insiders: 0
Sells
$11,245,077
Insiders: 6
Net
-$11,245,077
Shares: -170,496
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 170,496
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 152,696 | $0 | $10,693,277 | -$10,693,277 |
| 3-6 | 0 | 17,800 | $0 | $551,800 | -$551,800 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-11 of 11 reporting-owner rows connected to Ambiq Micro, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
11
Largest Forms 3/4/5 holder
Fumihide Esaka
Net 12M change
-$11,245,077
Latest report
02 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Fumihide Esaka | Chief Executive Officer, Director | $11,464,712 | -$4,201,122 | -27% | Median | 14 May 2026 |
| Sean Chihhsiang Chen | President and COO | $8,584,580 | -$3,947,281 | -31% | Filing P/S | 15 May 2026 |
| Wen Hsuan Hsieh | Director | $7,987,392 | Mixed | 18 Feb 2026 | ||
| Scott McLean Hanson | Chief Technology Officer, Director | $5,367,252 | -$1,016,252 | -16% | Median | 14 May 2026 |
| Jeffrey G. Winzeler | Chief Financial Officer | $2,701,057 | -$1,817,412 | -40% | Median | 02 Jun 2026 |
| Michele Kim Connors | General Counsel | $1,613,818 | -$21,210 | -1.3% | Filing P/S | 02 Apr 2026 |
| Joseph A. Tautges | Director | $1,511,126 | -$241,800 | -14% | Filing P/S | 26 Jan 2026 |
| Timothy Chen | Director | $1,209,973 | Median | 27 May 2026 | ||
| Bernard Bennett Banks | Director | Mixed | 05 Jan 2026 | |||
| Ker Zhang | Director | Mixed | 29 Jul 2025 | |||
| KPCB XVI Associates, LLC | 10%+ Owner | Mixed | 31 Jul 2025 |
Recent insider transactions for Ambiq Micro, Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Jeffrey G. Winzeler | AMBQ | Common Stock | Options Exercise | 5.93% | 5,952 | 106,299 | 02 Jun 2026 | Direct | ||
| Jeffrey G. Winzeler | AMBQ | Stock Option (Right to Buy) | Options Exercise | -5.37% | -5,952 | 104,953 | 02 Jun 2026 | Direct | ||
| Timothy Chen | AMBQ | Common Stock | Sale | -100% | -70,592 | 0 | 27 May 2026 | By: Triumph Way Investment Inc. | ||
| Jeffrey G. Winzeler | AMBQ | Common Stock | Options Exercise | 6.31% | 5,952 | 100,347 | 15 May 2026 | Direct | ||
| Jeffrey G. Winzeler | AMBQ | Stock Option (Right to Buy) | Options Exercise | -5.09% | -5,952 | 110,905 | 15 May 2026 | Direct | ||
| Scott McLean Hanson | AMBQ | Common Stock | Options Exercise | 3.99% | 8,100 | 211,226 | 15 May 2026 | Direct | ||
| Scott McLean Hanson | AMBQ | Stock Option (Right to Buy) | Options Exercise | -10.5% | -8,100 | 69,279 | 15 May 2026 | Direct | ||
| Sean Chihhsiang Chen | AMBQ | Common Stock | Sale | -31.6% | $3,947,281 | $70.89 | -55,685 | 120,275 | 15 May 2026 | Direct |
| Sean Chihhsiang Chen | AMBQ | Common Stock | Options Exercise | 46.3% | 55,685 | 175,960 | 15 May 2026 | Direct | ||
| Sean Chihhsiang Chen | AMBQ | Stock Option (Right to Buy) | Options Exercise | -100% | -55,685 | 1 | 15 May 2026 | Direct | ||
| Fumihide Esaka | AMBQ | Common Stock | Options Exercise | 15.3% | 60,000 | 451,189 | 15 May 2026 | Direct | ||
| Fumihide Esaka | AMBQ | Stock Option (Right to Buy) | Options Exercise | -37.7% | -60,000 | 99,007 | 15 May 2026 | Direct | ||
| Jeffrey G. Winzeler | AMBQ | Common Stock | Sale | -21.6% | $1,817,412 | $69.90 | -26,000 | 94,395 | 14 May 2026 | Direct |
| Jeffrey G. Winzeler | AMBQ | Common Stock | Options Exercise | 27.5% | 26,000 | 120,395 | 14 May 2026 | Direct | ||
| Jeffrey G. Winzeler | AMBQ | Stock Option (Right to Buy) | Options Exercise | -18.2% | -26,000 | 116,857 | 14 May 2026 | Direct | ||
| Scott McLean Hanson | AMBQ | Common Stock | Sale | -4.78% | $706,252 | $69.24 | -10,200 | 203,126 | 14 May 2026 | Direct |
| Scott McLean Hanson | AMBQ | Common Stock | Options Exercise | 5.02% | 10,200 | 213,326 | 14 May 2026 | Direct | ||
| Scott McLean Hanson | AMBQ | Stock Option (Right to Buy) | Options Exercise | -11.6% | -10,200 | 77,379 | 14 May 2026 | Direct | ||
| Fumihide Esaka | AMBQ | Common Stock | Sale | -13.3% | $4,201,122 | $70.02 | -60,000 | 391,189 | 14 May 2026 | Direct |
| Fumihide Esaka | AMBQ | Common Stock | Options Exercise | 15.3% | 60,000 | 451,189 | 14 May 2026 | Direct | ||
| Fumihide Esaka | AMBQ | Stock Option (Right to Buy) | Options Exercise | -29.3% | -60,000 | 144,470 | 14 May 2026 | Direct | ||
| Michele Kim Connors | AMBQ | Common Stock | Sale | -1.32% | $21,210 | $26.15 | -811 | 60,554 | 02 Apr 2026 | Direct |
| Jeffrey G. Winzeler | AMBQ | Common Stock | Award | 79.2% | 41,728 | 94,395 | 06 Mar 2026 | Direct | ||
| Sean Chihhsiang Chen | AMBQ | Common Stock | Award | 114.7% | 64,246 | 120,275 | 06 Mar 2026 | Direct | ||
| Scott McLean Hanson | AMBQ | Common Stock | Award | 65.4% | 80,308 | 203,126 | 06 Mar 2026 | Direct | ||
| Fumihide Esaka | AMBQ | Common Stock | Award | 69.7% | 160,616 | 391,189 | 06 Mar 2026 | Direct | ||
| Michele Kim Connors | AMBQ | Common Stock | Award | 109.8% | 32,123 | 61,365 | 06 Mar 2026 | Direct | ||
| Wen Hsuan Hsieh | AMBQ | Common Stock | Options Exercise | 60.5% | 238,931 | 633,920 | 18 Feb 2026 | By: Matter Venture Partners Fund I, L.P. | ||
| Wen Hsuan Hsieh | AMBQ | Warrant (Right to Buy) | Options Exercise | -100% | -238,931 | 0 | 18 Feb 2026 | By: Matter Venture Partners Fund I, L.P. | ||
| Scott McLean Hanson | AMBQ | Common Stock | Sale | -7.53% | $310,000 | $31.00 | -10,000 | 122,818 | 26 Jan 2026 | Direct |
| Joseph A. Tautges | AMBQ | Common Stock | Sale | -13.8% | $241,800 | $31.00 | -7,800 | 48,746 | 26 Jan 2026 | Direct |
| Michele Kim Connors | AMBQ | Common Stock | Award | 29,242 | 29,242 | 05 Jan 2026 | Direct | |||
| Fumihide Esaka | AMBQ | Common Stock | Options Exercise | 30.3% | 53,660 | 230,573 | 07 Oct 2025 | Direct | ||
| Fumihide Esaka | AMBQ | Stock Option (Right to Buy) | Options Exercise | -100% | -53,660 | 0 | 07 Oct 2025 | Direct | ||
| Jeffrey G. Winzeler | AMBQ | Common Stock | Award | 52,667 | 52,667 | 02 Oct 2025 | Direct | |||
| Scott McLean Hanson | AMBQ | Common Stock | Award | 171.1% | 83,819 | 132,818 | 02 Oct 2025 | Direct | ||
| Sean Chihhsiang Chen | AMBQ | Common Stock | Award | 56,029 | 56,029 | 02 Oct 2025 | Direct | |||
| Fumihide Esaka | AMBQ | Common Stock | Award | 940.3% | 159,907 | 176,913 | 02 Oct 2025 | Direct | ||
| Timothy Chen | AMBQ | Common Stock | Conversion of derivative security | 70,592 | 70,592 | 31 Jul 2025 | By: Triumph Way Investment Inc. | |||
| Timothy Chen | AMBQ | Series F-1 Convertible Preferred Stock | Conversion of derivative security | -100% | -1,707,853 | 0 | 31 Jul 2025 | By: Triumph Way Investment Inc. | ||
| KPCB XVI Associates, LLC | AMBQ | Common Stock | Conversion of derivative security | 27% | 316,870 | 1,488,949 | 31 Jul 2025 | By KPCB Holdings, Inc., as nominee | ||
| KPCB XVI Associates, LLC | AMBQ | Common Stock | Conversion of derivative security | 176.4% | 748,046 | 1,172,079 | 31 Jul 2025 | By: KPCB Holdings, Inc., as nominee | ||
| KPCB XVI Associates, LLC | AMBQ | Series F Convertible Preferred Stock | Conversion of derivative security | -100% | -171,064 | 0 | 31 Jul 2025 | By: KPCB Holdings, Inc., as nominee | ||
| KPCB XVI Associates, LLC | AMBQ | Series E Convertible Preferred Stock | Conversion of derivative security | -100% | -22,594 | 0 | 31 Jul 2025 | By: KPCB Holdings, Inc., as nominee | ||
| KPCB XVI Associates, LLC | AMBQ | Series D Convertible Preferred Stock | Conversion of derivative security | -100% | -98,958 | 0 | 31 Jul 2025 | By: KPCB Holdings, Inc., as nominee | ||
| KPCB XVI Associates, LLC | AMBQ | Series C Convertible Preferred Stock | Conversion of derivative security | -100% | -748,046 | 0 | 31 Jul 2025 | By: KPCB Holdings, Inc., as nominee | ||
| Wen Hsuan Hsieh | AMBQ | Common Stock | Conversion of derivative security | 394,989 | 394,989 | 31 Jul 2025 | By: Matter Venture Partners Fund I, L.P. | |||
| Wen Hsuan Hsieh | AMBQ | Series G Convertible Preferred Stock | Conversion of derivative security | -100% | -394,989 | 0 | 31 Jul 2025 | By: Matter Venture Partners Fund I, L.P. | ||
| Ker Zhang | AMBQ | Common Stock | Award | 23,809 | 23,809 | 29 Jul 2025 | Direct | |||
| Joseph A. Tautges | AMBQ | Common Stock | Award | 56,546 | 56,546 | 29 Jul 2025 | Direct |
* marks a reported price that did not pass the local price check.