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
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
04 Sep 2026
- Public ticker
- AMBQ on NYSE
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Kleiner Perkins Caufield & Byers XVI, LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Kleiner Perkins Caufield & Byers XVI, LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
04 Sep 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001500412
- Issuer location
- Austin, TX
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 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
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
04 Sep 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%
BlackRock, Inc.
5.3%
T. Rowe Price Investment Manageme...
4.3%
Wen Hsuan Hsieh
2.7%
Michele Kim Connors
0.26%
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 |
| BlackRock, Inc. |
13F
13D/G
Company
|
5.3%
from 13D/G
|
$121,909,012
1,380,623 shares
|
— | 30 Jun 2026 |
| T. Rowe Price Investment Management, Inc. |
13F
13D/G
Company
|
4.3%
from 13D/G
|
$88,862,000
1,006,359 shares
|
— | 30 Jun 2026 |
| Wen Hsuan Hsieh |
3/4/5
Director
|
2.7%
|
$16,233,864
638,877 shares
|
— | 08 Jun 2026 |
| Michele Kim Connors |
3/4/5
General Counsel
|
0.26%
|
$1,613,818
60,554 shares
|
-$21,210 | 02 Apr 2026 |
| Joseph A. Tautges |
3/4/5
Director
|
0.23%
|
$1,364,593
53,703 shares
|
-$241,800 | 08 Jun 2026 |
| Timothy Chen |
3/4/5
Director
|
0.22%
|
$1,335,930
52,575 shares
|
— | 08 Jun 2026 |
| Ker Zhang |
3/4/5
Director
|
0.13%
|
$1,728,432
30,366 shares
|
-$10,530 | 04 Sep 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: -$22,888,654.
Buys
$0
Insiders: 0
Sells
$22,888,654
Insiders: 7
Net
-$22,888,654
Shares: -369,681
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 369,681
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 199,185 | $0 | $11,643,577 | -$11,643,577 |
| 3-6 | 0 | 152,696 | $0 | $10,693,277 | -$10,693,277 |
| 6-9 | 0 | 17,800 | $0 | $551,800 | -$551,800 |
| 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
-$22,888,655
Latest report
04 Sep 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Fumihide Esaka | Chief Executive Officer, Director | $26,140,360 | -$11,242,894 | -30% | Filing P/S | 31 Aug 2026 |
| Wen Hsuan Hsieh | Director | $16,233,864 | Mixed | 08 Jun 2026 | ||
| Scott McLean Hanson | Chief Technology Officer, Director | $13,344,573 | -$4,749,970 | -26% | Filing P/S | 26 Aug 2026 |
| Sean Chihhsiang Chen | President and COO | $6,937,293 | -$4,804,839 | -41% | Filing P/S | 04 Sep 2026 |
| Jeffrey G. Winzeler | Chief Financial Officer | $2,701,057 | -$1,817,412 | -40% | Mixed | 02 Jun 2026 |
| Ker Zhang | Director | $1,728,432 | -$10,530 | -0.61% | Filing P/S | 04 Sep 2026 |
| Michele Kim Connors | General Counsel | $1,613,818 | -$21,210 | -1.3% | Filing P/S | 02 Apr 2026 |
| Joseph A. Tautges | Director | $1,364,593 | -$241,800 | -15% | Mixed | 08 Jun 2026 |
| Timothy Chen | Director | $1,335,930 | Mixed | 08 Jun 2026 | ||
| Bernard Bennett Banks | Director | $125,957 | Mixed | 08 Jun 2026 | ||
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Sean Chihhsiang Chen | AMBQ | Common Stock | Sale | -11.1% | $857,558 | $57.17 | -15,000 | 120,275 | 04 Sep 2026 | Direct |
| Sean Chihhsiang Chen | AMBQ | Common Stock | Options Exercise | 12.5% | 15,000 | 135,275 | 04 Sep 2026 | Direct | ||
| Sean Chihhsiang Chen | AMBQ | Stock Option (Right to Buy) | Options Exercise | -9.12% | -15,000 | 149,423 | 04 Sep 2026 | Direct | ||
| Ker Zhang | AMBQ | Common Stock | Sale | -0.61% | $10,530 | $56.92 | -185 | 30,366 | 04 Sep 2026 | Direct |
| Ker Zhang | AMBQ | Common Stock | Options Exercise | 6.21% | 1,785 | 30,551 | 04 Sep 2026 | Direct | ||
| Ker Zhang | AMBQ | Stock Option (Right to Buy) | Options Exercise | -100% | -1,785 | 0 | 04 Sep 2026 | Direct | ||
| Fumihide Esaka | AMBQ | Common Stock | Sale | -2.34% | $625,108 | $56.69 | -11,027 | 460,460 | 02 Sep 2026 | Direct |
| Fumihide Esaka | AMBQ | Common Stock | Options Exercise | 2.39% | 11,027 | 471,487 | 02 Sep 2026 | Direct | ||
| Fumihide Esaka | AMBQ | Stock Option (Right to Buy) | Options Exercise | -36.7% | -11,027 | 19,007 | 02 Sep 2026 | Direct | ||
| Fumihide Esaka | AMBQ | Common Stock | Sale | -9.61% | $2,761,534 | $56.39 | -48,973 | 460,460 | 01 Sep 2026 | Direct |
| Fumihide Esaka | AMBQ | Common Stock | Options Exercise | 10.6% | 48,973 | 509,433 | 01 Sep 2026 | Direct | ||
| Fumihide Esaka | AMBQ | Stock Option (Right to Buy) | Options Exercise | -62% | -48,973 | 30,034 | 01 Sep 2026 | Direct | ||
| Fumihide Esaka | AMBQ | Common Stock | Sale | -9.71% | $2,785,904 | $57.44 | -48,500 | 451,189 | 31 Aug 2026 | Direct |
| Fumihide Esaka | AMBQ | Common Stock | Options Exercise | 13.2% | 57,771 | 495,460 | 31 Aug 2026 | Direct | ||
| Fumihide Esaka | AMBQ | Stock Option (Right to Buy) | Options Exercise | -44.5% | -57,771 | 72,007 | 31 Aug 2026 | Direct | ||
| Scott McLean Hanson | AMBQ | Common Stock | Sale | -11.1% | $1,644,609 | $59.80 | -27,500 | 221,226 | 27 Aug 2026 | Direct |
| Scott McLean Hanson | AMBQ | Common Stock | Options Exercise | 12.4% | 27,500 | 248,726 | 27 Aug 2026 | Direct | ||
| Scott McLean Hanson | AMBQ | Stock Option (Right to Buy) | Options Exercise | -24.8% | -27,500 | 83,558 | 27 Aug 2026 | Direct | ||
| Scott McLean Hanson | AMBQ | Common Stock | Sale | -11.1% | $1,638,469 | $59.58 | -27,500 | 221,226 | 26 Aug 2026 | Direct |
| Scott McLean Hanson | AMBQ | Common Stock | Options Exercise | 17.8% | 37,500 | 248,726 | 26 Aug 2026 | Direct | ||
| Scott McLean Hanson | AMBQ | Stock Option (Right to Buy) | Options Exercise | -41.8% | -37,500 | 52,279 | 26 Aug 2026 | Direct | ||
| Scott McLean Hanson | AMBQ | Common Stock | Sale | -3.21% | $450,639 | $64.38 | -7,000 | 211,226 | 14 Aug 2026 | Direct |
| Scott McLean Hanson | AMBQ | Common Stock | Options Exercise | 3.31% | 7,000 | 218,226 | 14 Aug 2026 | Direct | ||
| Scott McLean Hanson | AMBQ | Stock Option (Right to Buy) | Options Exercise | -10.1% | -7,000 | 62,279 | 14 Aug 2026 | Direct | ||
| Fumihide Esaka | AMBQ | Common Stock | Sale | -2.91% | $869,226 | $64.39 | -13,500 | 451,189 | 14 Aug 2026 | Direct |
| Fumihide Esaka | AMBQ | Common Stock | Options Exercise | 2.99% | 13,500 | 464,689 | 14 Aug 2026 | Direct | ||
| Fumihide Esaka | AMBQ | Stock Option (Right to Buy) | Options Exercise | -13.6% | -13,500 | 85,507 | 14 Aug 2026 | Direct | ||
| Wen Hsuan Hsieh | AMBQ | Common Stock | Award | 4,957 | 4,957 | 08 Jun 2026 | Direct | |||
| Timothy Chen | AMBQ | Common Stock | Award | 10.4% | 4,957 | 52,575 | 08 Jun 2026 | Direct | ||
| Bernard Bennett Banks | AMBQ | Common Stock | Award | 4,957 | 4,957 | 08 Jun 2026 | Direct | |||
| Joseph A. Tautges | AMBQ | Common Stock | Award | 10.2% | 4,957 | 53,703 | 08 Jun 2026 | Direct | ||
| Ker Zhang | AMBQ | Common Stock | Award | 20.8% | 4,957 | 28,766 | 08 Jun 2026 | Direct | ||
| 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 |
* marks a reported price that did not pass the local price check.