Comparable stake leader
VANGUARD PORTFOLIO MANAGEMENT LLC
SEC ownership of AMBARELLA INC
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001280263.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
17 Jun 2026
- Public ticker
- AMBA on Nasdaq
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
VANGUARD PORTFOLIO MANAGEMENT LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
VANGUARD PORTFOLIO MANAGEMENT LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
17 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001280263
- Issuer location
- Santa Clara, CA
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 AMBARELLA 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
VANGUARD PORTFOLIO MANAGE...
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
17 Jun 2026
13D/G
13F
3/4/5
Lead comparable stake: 8.6%
13D/G row: VANGUARD PORTFOLIO MANAGEMENT LLC
Showing 1-8 of 50 holder rows.
Quick read
VANGUARD PORTFOLIO MANAGEMENT LLC leads the comparable SEC ownership view at 8.6%.
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 VANGUARD PORTFOLIO MANAGEMENT LLC's linked filing trail.
Comparable ownership
Top 5
VANGUARD PORTFOLIO MANAGEMENT LLC
8.6%
BlackRock, Inc.
7.3%
Feng-Ming Wang
1.8%
Chi-Hong Ju
0.4%
Chan W. Lee
0.36%
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 |
|---|---|---|---|---|---|
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
8.6%
|
$193,175,380
3,752,800 shares
|
$0 | 31 Mar 2026 |
| BlackRock, Inc. |
13F
13D/G
Company
|
7.3%
from 13D/G
|
$195,049,857
3,789,215 shares
|
— | 31 Mar 2026 |
| Feng-Ming Wang |
3/4/5
CEO, Director
|
1.8%
|
$40,657,889
789,857 shares
|
-$8,604,769 | 17 Jun 2026 |
| Chi-Hong Ju |
3/4/5
Senior VP, Systems & GM
|
0.4%
|
$11,673,061
173,924 shares
|
-$3,008,751 | 17 Jun 2026 |
| Chan W. Lee |
3/4/5
Chief Operations Officer
|
0.36%
|
$10,662,241
157,098 shares
|
-$1,079,947 | 17 Jun 2026 |
| Yun-Lung Chen |
3/4/5
VP, Business Development and
|
0.15%
|
$4,460,495
66,515 shares
|
-$1,377,838 | 12 Jun 2026 |
| Christopher B. Paisley |
3/4/5
Director
|
0.09%
|
$2,979,518
41,279 shares
|
-$98,670 | 26 Dec 2025 |
| Hsiao-Wuen Hon |
3/4/5
Director
|
0.07%
|
$1,935,502
30,776 shares
|
— | 02 Sep 2025 |
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: -$16,189,464.
Buys
$0
Insiders: 0
Sells
$16,189,464
Insiders: 8
Net
-$16,189,464
Shares: -234,717
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 234,717
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 60,932 | $0 | $4,873,548 | -$4,873,548 |
| 3-6 | 0 | 121,866 | $0 | $7,246,535 | -$7,246,535 |
| 6-9 | 0 | 29,569 | $0 | $2,268,597 | -$2,268,597 |
| 9-12 | 0 | 22,350 | $0 | $1,800,786 | -$1,800,786 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-19 of 19 reporting-owner rows connected to AMBARELLA INC. Open a relationship link for the CIK-to-CIK filing trail.
Rows
19
Largest Forms 3/4/5 holder
Leslie Kohn
Net 12M change
-$16,189,465
Latest report
17 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Leslie Kohn | Chief Technology Officer, Director | $77,637,106 | -$178,638 | -0.23% | Filing P/S | 17 Sep 2025 |
| Feng-Ming Wang | CEO, Director | $40,657,889 | -$8,604,769 | -17% | Median | 17 Jun 2026 |
| Chi-Hong Ju | Senior VP, Systems & GM | $11,673,061 | -$3,008,751 | -20% | Mixed | 17 Jun 2026 |
| Chan W. Lee | Chief Operations Officer | $10,662,241 | -$1,079,947 | -9.2% | Filing P/S | 17 Jun 2026 |
| John Alexander Young | Cfo | $7,541,278 | -$1,568,244 | -17% | Filing P/S | 17 Jun 2026 |
| Andrew W. Verhalen | Director | $6,117,572 | Mixed | 31 Aug 2023 | ||
| Brian C. White | Cfo | $4,681,200 | Mixed | 19 Dec 2023 | ||
| Kevin C. Eichler | Cfo | $4,625,573 | Mixed | 16 Mar 2022 | ||
| Yun-Lung Chen | VP, Business Development and | $4,460,495 | -$1,377,838 | -24% | Filing P/S | 12 Jun 2026 |
| Christopher B. Paisley | Director | $2,979,518 | -$98,670 | -3.2% | Filing P/S | 26 Dec 2025 |
| David Jeffrey Richardson | Director | $2,438,622 | Mixed | 15 Dec 2025 | ||
| Hsiao-Wuen Hon | Director | $1,935,502 | Mixed | 02 Sep 2025 | ||
| Chenming Hu | Director | $1,856,261 | Mixed | 02 Sep 2025 | ||
| Christopher Day | VP, Marketing | $789,073 | Filing P/S | 17 Jun 2025 | ||
| Anne de Greef-Safft | Director | $664,202 | Mixed | 29 Aug 2024 | ||
| Elizabeth M. Schwarting | Director | $484,202 | -$272,608 | -36% | Filing P/S | 16 Dec 2025 |
| Teresa H. Meng | Director | $417,103 | Mixed | 16 Mar 2022 | ||
| Chantelle Yvette Breithaupt | Director | $310,676 | Mixed | 02 Sep 2025 | ||
| Gregory M. Bryant | Director | $164,299 | Mixed | 02 Mar 2026 |
Recent insider transactions for AMBARELLA 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| John Alexander Young | AMBA | Ordinary Shares | Sale | -4.28% | $339,946 | $67.54 | -5,033 | 112,590 | 17 Jun 2026 | Direct |
| Chan W. Lee | AMBA | Ordinary Shares | Sale | -1.84% | $200,284 | $67.87 | -2,951 | 157,098 | 17 Jun 2026 | Direct |
| Chi-Hong Ju | AMBA | Ordinary Shares | Sale | -1.2% | $136,894 | $67.87 | -2,017 | 165,924 | 17 Jun 2026 | Direct |
| Feng-Ming Wang | AMBA | Ordinary Shares | Gift | -1.25% | -10,000 | 789,857 | 17 Jun 2026 | Direct | ||
| Feng-Ming Wang | AMBA | Ordinary Shares | Sale | -0.77% | $421,065 | $67.87 | -6,204 | 799,857 | 17 Jun 2026 | Direct |
| Yun-Lung Chen | AMBA | Ordinary Shares | Sale | -12.9% | $660,943 | $67.06 | -9,856 | 66,515 | 12 Jun 2026 | Direct |
| John Alexander Young | AMBA | Ordinary Shares | Sale | -0.34% | $38,400 | $96.00 | -400 | 117,623 | 26 May 2026 | Direct |
| John Alexander Young | AMBA | Ordinary Shares | Options Exercise | 0.34% | 400 | 118,023 | 26 May 2026 | Direct | ||
| John Alexander Young | AMBA | Non-Qualified Stock Option (right to buy) | Options Exercise | -1.6% | -400 | 24,600 | 26 May 2026 | Direct | ||
| Feng-Ming Wang | AMBA | Ordinary Shares | Sale | -3.88% | $2,957,755 | $91.01 | -32,500 | 806,061 | 26 May 2026 | Direct |
| John Alexander Young | AMBA | Ordinary Shares | Sale | -1.65% | $118,260 | $60.00 | -1,971 | 117,623 | 21 Apr 2026 | Direct |
| John Alexander Young | AMBA | Ordinary Shares | Sale | -2.48% | $164,477 | $54.14 | -3,038 | 119,594 | 19 Mar 2026 | Direct |
| Chan W. Lee | AMBA | Ordinary Shares | Sale | -2.22% | $197,124 | $54.14 | -3,641 | 160,049 | 19 Mar 2026 | Direct |
| Chi-Hong Ju | AMBA | Ordinary Shares | Sale | -1.27% | $116,672 | $54.14 | -2,155 | 167,941 | 19 Mar 2026 | Direct |
| Feng-Ming Wang | AMBA | Ordinary Shares | Sale | -0.95% | $437,614 | $54.14 | -8,083 | 838,561 | 19 Mar 2026 | Direct |
| John Alexander Young | AMBA | Ordinary Shares | Award | 4.75% | 5,560 | 122,632 | 18 Mar 2026 | Direct | ||
| Yun-Lung Chen | AMBA | Ordinary Shares | Award | 3.88% | 2,849 | 76,371 | 18 Mar 2026 | Direct | ||
| Chan W. Lee | AMBA | Ordinary Shares | Award | 4.68% | 7,320 | 163,690 | 18 Mar 2026 | Direct | ||
| Chi-Hong Ju | AMBA | Ordinary Shares | Award | 3.61% | 5,930 | 170,096 | 18 Mar 2026 | Direct | ||
| Feng-Ming Wang | AMBA | Ordinary Shares | Award | 1.89% | 15,686 | 846,644 | 18 Mar 2026 | Direct | ||
| John Alexander Young | AMBA | Ordinary Shares | Sale | -3.76% | $241,528 | $52.77 | -4,577 | 117,072 | 17 Mar 2026 | Direct |
| John Alexander Young | AMBA | Ordinary Shares | Options Exercise | 3.01% | 3,556 | 121,649 | 17 Mar 2026 | Direct | ||
| John Alexander Young | AMBA | Performance Stock Units | Options Exercise | -100% | -3,556 | 0 | 17 Mar 2026 | Direct | ||
| Yun-Lung Chen | AMBA | Ordinary Shares | Options Exercise | 6.75% | 4,651 | 73,522 | 17 Mar 2026 | Direct | ||
| Yun-Lung Chen | AMBA | Performance Stock Units | Options Exercise | -100% | -4,651 | 0 | 17 Mar 2026 | Direct | ||
| Chan W. Lee | AMBA | Ordinary Shares | Sale | -4.13% | $355,089 | $52.77 | -6,729 | 156,370 | 17 Mar 2026 | Direct |
| Chan W. Lee | AMBA | Ordinary Shares | Options Exercise | 9.15% | 13,678 | 163,099 | 17 Mar 2026 | Direct | ||
| Chan W. Lee | AMBA | Performance Stock Units | Options Exercise | -100% | -13,678 | 0 | 17 Mar 2026 | Direct | ||
| Chi-Hong Ju | AMBA | Ordinary Shares | Sale | -2.8% | $249,549 | $52.77 | -4,729 | 164,166 | 17 Mar 2026 | Direct |
| Chi-Hong Ju | AMBA | Ordinary Shares | Options Exercise | 6% | 9,553 | 168,895 | 17 Mar 2026 | Direct | ||
| Chi-Hong Ju | AMBA | Performance Stock Units | Options Exercise | -100% | -9,553 | 0 | 17 Mar 2026 | Direct | ||
| Feng-Ming Wang | AMBA | Ordinary Shares | Sale | -2.23% | $1,001,364 | $52.77 | -18,976 | 830,958 | 17 Mar 2026 | Direct |
| Feng-Ming Wang | AMBA | Ordinary Shares | Options Exercise | 3.36% | 27,598 | 849,934 | 17 Mar 2026 | Direct | ||
| Feng-Ming Wang | AMBA | Performance Stock Units | Options Exercise | -100% | -27,598 | 0 | 17 Mar 2026 | Direct | ||
| John Alexander Young | AMBA | Ordinary Shares | Award | 14.8% | 15,201 | 117,939 | 02 Mar 2026 | Direct | ||
| John Alexander Young | AMBA | Performance Stock Units | Award | 15,201 | 15,201 | 02 Mar 2026 | Direct | |||
| Yun-Lung Chen | AMBA | Ordinary Shares | Award | 11.7% | 7,220 | 68,871 | 02 Mar 2026 | Direct | ||
| Yun-Lung Chen | AMBA | Performance Stock Units | Award | 7,220 | 7,220 | 02 Mar 2026 | Direct | |||
| Chan W. Lee | AMBA | Ordinary Shares | Award | 19.8% | 24,701 | 149,267 | 02 Mar 2026 | Direct | ||
| Chan W. Lee | AMBA | Performance Stock Units | Award | 24,701 | 24,701 | 02 Mar 2026 | Direct | |||
| Chi-Hong Ju | AMBA | Ordinary Shares | Award | 12.2% | 17,329 | 159,188 | 02 Mar 2026 | Direct | ||
| Chi-Hong Ju | AMBA | Performance Stock Units | Award | 17,329 | 17,329 | 02 Mar 2026 | Direct | |||
| Feng-Ming Wang | AMBA | Ordinary Shares | Award | 6.92% | 53,203 | 822,182 | 02 Mar 2026 | Direct | ||
| Feng-Ming Wang | AMBA | Ordinary Shares | Sale | -6.11% | $3,040,031 | $60.80 | -50,000 | 768,979 | 02 Mar 2026 | Direct |
| Feng-Ming Wang | AMBA | Ordinary Shares | Options Exercise | 6.5% | 50,000 | 818,979 | 02 Mar 2026 | Direct | ||
| Feng-Ming Wang | AMBA | Performance Stock Units | Award | 53,203 | 53,203 | 02 Mar 2026 | Direct | |||
| Feng-Ming Wang | AMBA | Non-Qualified Stock Option (right to buy) | Options Exercise | -100% | -50,000 | 0 | 02 Mar 2026 | Direct | ||
| Gregory M. Bryant | AMBA | Ordinary Shares | Award | 2,457 | 2,457 | 02 Mar 2026 | Direct | |||
| Chi-Hong Ju | AMBA | Ordinary Shares | Sale | -5.03% | $584,105 | $75.58 | -7,728 | 146,039 | 05 Jan 2026 | Direct |
| Chi-Hong Ju | AMBA | Ordinary Shares | Sale | -5.04% | $558,136 | $70.25 | -7,945 | 149,587 | 30 Dec 2025 | Direct |
* marks a reported price that did not pass the local price check.