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
3/50
Latest evidence
15 Oct 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
-
3 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
-
15 Oct 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
3/50
Latest evidence
15 Oct 2026
13D/G
13F
3/4/5
Lead comparable stake: 8.2%
47 rows are not safely comparable across share classes.
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%.
3 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 3
Kleiner Perkins Caufield & Byers ...
8.2%
BlackRock, Inc.
5.3%
T. Rowe Price Investment Manageme...
4.3%
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%
Reported 13D/G
· 30 Sep 2025
|
$44,549,354
1,488,949 shares
|
$0 | 30 Sep 2025 |
| BlackRock, Inc. |
13F
13D/G
Company
|
5.3%
Reported 13D/G
· 30 Jun 2026
|
$121,909,012
1,380,623 shares
|
— | 30 Jun 2026 |
| T. Rowe Price Investment Management, Inc. |
13F
13D/G
Company
|
4.3%
Reported 13D/G
· 30 Jun 2026
|
$88,862,000
1,006,359 shares
|
— | 30 Jun 2026 |
| KPCB XVI Associates, LLC |
3/4/5
10%+ Owner
|
—
denominator unverified
|
—
1,488,949 shares
|
— | 31 Jul 2025 |
| D. E. Shaw & Co., Inc. |
13F
Company
|
—
denominator unverified
|
$86,879,783
983,916 shares
|
— | 30 Jun 2026 |
| Atreides Management, LP |
13F
Company
|
—
denominator unverified
|
$77,449,961
877,123 shares
|
— | 30 Jun 2026 |
| STATE STREET CORP |
13F
Company
|
—
denominator unverified
|
$76,112,746
861,979 shares
|
— | 30 Jun 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
—
denominator unverified
|
$67,861,994
768,539 shares
|
— | 30 Jun 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: -$33,301,244.
Buys
$0
Insiders: 0
Sells
$33,301,244
Insiders: 7
Net
-$33,301,244
Shares: -536,883
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 536,883
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 366,387 | $0 | $22,056,167 | -$22,056,167 |
| 3-6 | 0 | 151,885 | $0 | $10,672,067 | -$10,672,067 |
| 6-9 | 0 | 18,611 | $0 | $573,010 | -$573,010 |
| 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
-$33,301,244
Latest report
15 Oct 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Fumihide Esaka | Chief Executive Officer, Director | $23,018,301 | -$16,632,124 | -42% | Filing P/S | 15 Oct 2026 |
| Wen Hsuan Hsieh | Director | $16,233,864 | Mixed | 08 Jun 2026 | ||
| Scott McLean Hanson | Chief Technology Officer, Director | $11,022,954 | -$6,133,011 | -36% | Filing P/S | 15 Oct 2026 |
| Jeffrey G. Winzeler | Chief Financial Officer | $7,246,569 | -$2,197,057 | -23% | Filing P/S | 02 Oct 2026 |
| Sean Chihhsiang Chen | President and COO | $5,767,164 | -$7,431,151 | -56% | Filing P/S | 14 Oct 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 | ||
| Ker Zhang | Director | $1,302,338 | -$644,891 | -33% | Filing P/S | 11 Sep 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Scott McLean Hanson | AMBQ | Common Stock | Sale | -3.19% | $357,008 | $51.00 | -7,000 | 212,546 | 15 Oct 2026 | Direct |
| Scott McLean Hanson | AMBQ | Common Stock | Options Exercise | 3.29% | 7,000 | 219,546 | 15 Oct 2026 | Direct | ||
| Scott McLean Hanson | AMBQ | Stock Option (Right to Buy) | Options Exercise | -15.5% | -7,000 | 38,279 | 15 Oct 2026 | Direct | ||
| Fumihide Esaka | AMBQ | Common Stock | Sale | -1.11% | $255,017 | $51.00 | -5,000 | 443,900 | 15 Oct 2026 | Direct |
| Fumihide Esaka | AMBQ | Common Stock | Options Exercise | 1.13% | 5,000 | 448,900 | 15 Oct 2026 | Direct | ||
| Fumihide Esaka | AMBQ | Stock Option (Right to Buy) | Options Exercise | -8.55% | -5,000 | 53,507 | 15 Oct 2026 | Direct | ||
| Sean Chihhsiang Chen | AMBQ | Common Stock | Sale | -12.4% | $772,438 | $51.50 | -15,000 | 106,268 | 14 Oct 2026 | Direct |
| Sean Chihhsiang Chen | AMBQ | Common Stock | Options Exercise | 14.1% | 15,000 | 121,268 | 14 Oct 2026 | Direct | ||
| Sean Chihhsiang Chen | AMBQ | Stock Option (Right to Buy) | Options Exercise | -11.2% | -15,000 | 119,423 | 14 Oct 2026 | Direct | ||
| Sean Chihhsiang Chen | AMBQ | Common Stock | Sale | -7.17% | $547,950 | $66.78 | -8,205 | 106,268 | 05 Oct 2026 | Direct |
| Jeffrey G. Winzeler | AMBQ | Common Stock | Sale | -5.13% | $379,645 | $69.60 | -5,455 | 100,844 | 02 Oct 2026 | Direct |
| Fumihide Esaka | AMBQ | Common Stock | Sale | -3.6% | $1,152,504 | $69.60 | -16,560 | 443,900 | 02 Oct 2026 | Direct |
| Scott McLean Hanson | AMBQ | Common Stock | Sale | -3.92% | $604,091 | $69.60 | -8,680 | 212,546 | 02 Oct 2026 | Direct |
| Sean Chihhsiang Chen | AMBQ | Common Stock | Sale | -4.82% | $403,794 | $69.60 | -5,802 | 114,473 | 02 Oct 2026 | Direct |
| Scott McLean Hanson | AMBQ | Common Stock | Sale | -3.07% | $421,942 | $60.28 | -7,000 | 221,226 | 15 Sep 2026 | Direct |
| Scott McLean Hanson | AMBQ | Common Stock | Options Exercise | 3.16% | 7,000 | 228,226 | 15 Sep 2026 | Direct | ||
| Scott McLean Hanson | AMBQ | Stock Option (Right to Buy) | Options Exercise | -13.4% | -7,000 | 45,279 | 15 Sep 2026 | Direct | ||
| Fumihide Esaka | AMBQ | Common Stock | Sale | -2.85% | $813,715 | $60.28 | -13,500 | 460,460 | 15 Sep 2026 | Direct |
| Fumihide Esaka | AMBQ | Common Stock | Options Exercise | 2.93% | 13,500 | 473,960 | 15 Sep 2026 | Direct | ||
| Fumihide Esaka | AMBQ | Stock Option (Right to Buy) | Options Exercise | -18.8% | -13,500 | 58,507 | 15 Sep 2026 | Direct | ||
| Sean Chihhsiang Chen | AMBQ | Common Stock | Sale | -11.1% | $902,130 | $60.14 | -15,000 | 120,275 | 14 Sep 2026 | Direct |
| Sean Chihhsiang Chen | AMBQ | Common Stock | Options Exercise | 12.5% | 15,000 | 135,275 | 14 Sep 2026 | Direct | ||
| Sean Chihhsiang Chen | AMBQ | Stock Option (Right to Buy) | Options Exercise | -10% | -15,000 | 134,423 | 14 Sep 2026 | Direct | ||
| Ker Zhang | AMBQ | Common Stock | Sale | -32.9% | $634,361 | $63.44 | -10,000 | 20,366 | 11 Sep 2026 | Direct |
| Fumihide Esaka | AMBQ | Common Stock | Sale | -9.8% | $3,167,993 | $63.36 | -50,000 | 460,460 | 11 Sep 2026 | Direct |
| Fumihide Esaka | AMBQ | Common Stock | Options Exercise | 10.9% | 50,000 | 510,460 | 11 Sep 2026 | Direct | ||
| Fumihide Esaka | AMBQ | Stock Option (Right to Buy) | Options Exercise | -100% | -50,000 | 0 | 11 Sep 2026 | Direct | ||
| 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 |
* marks a reported price that did not pass the local price check.