Ambarella, Inc. (AMBA)
Nasdaq: AMBA · Semiconductors & Related Devices · Santa Clara, CA · filing with the SEC since 2004
Grade5.6
◀ Past 4.7● Present 5.1▶ Future 7.2
Who owns Ambarella, Inc.
As filed with the SECHolders of 5% or more
5
Vanguard Portfolio Management holds 8.57% of Common Stock, as its SCHEDULE 13G filed Apr 28, 2026 says.
Directors and officers
13
report now, of 21 people on the record since 2012. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 5 named at left.
Holders of 5% or moreshare of the class, as filed
Vanguard Portfolio Management
SCHEDULE 13G · filed Apr 28, 2026 · Common Stock
Blackrock, Inc.
SCHEDULE 13G/A · filed Apr 23, 2025 · Common Stock
T. Rowe Price Associates, Inc.
SCHEDULE 13G · filed Aug 14, 2026 · COMMON STOCK
State Street Corporation
SCHEDULE 13G · filed Aug 7, 2026 · COMMON STOCK
Vanguard Capital Management
SCHEDULE 13G · filed Jul 31, 2026 · Common Stock
The Vanguard Group
SCHEDULE 13G/A · filed Mar 26, 2026 · Common Stock · reported falling below 5%, from 12.7% in Jan 30, 2026
What AMBA reports owning in othersstakes of 5% or more, and other ties
11 subsidiaries in 9 countries, from the list filed with the 10-K filed Mar 29, 2024.
Insider tradesForm 4
47sales
0purchases
16sales on a scheduled plan
7people selling
$18.3Msold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window7 of 23 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Wang Feng-Ming | CEO | 14 | $10.1M | 9 | 0 | $0 |
| Ju Chi-Hong | Senior VP, Systems & GM | 11 | $3.9M | 0 | 0 | $0 |
| Young John Alexander | CFO | 10 | $1.7M | 5 | 0 | $0 |
| Lee Chan W | Chief Operations Officer | 5 | $1.1M | 0 | 0 | $0 |
| Chen Yun-Lung | VP, Business Dev. & Marketing | 2 | $1.1M | 0 | 0 | $0 |
| Schwarting Elizabeth M | director | 2 | $300,000 | 0 | 0 | $0 |
| Paisley Christopher B | director | 3 | $100,000 | 2 | 0 | $0 |