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See how Context works →On the price, the facts of the public record■Insider buy□Insider sell●Results filed
With an account, also○dividends▲splits◌next earningswith an account
End-of-day prices provided by Twelve Data · One close per session; the series does not update during the trading day.
Latest on record
The most recent facts, as filed.
Up to three of the most recent, checkable facts already loaded on this page, each linked to its source.
- Sep 25, 2026Reported sale · Form 4CHRISTOPHER B PAISLEY · $17.7KOpen the filing ↗
- Sep 25, 2026Notice of sale · Form 144PAISLEY CHRISTOPHER B · Director · $17.7KOpen the filing ↗
- Sep 18, 2026Reported sale · Form 4John Alexander Young, CFO · $127.6KOpen the filing ↗
In numbers
What this profile holds, counted.
Closes · 1 year250
SEC filings on record1,40613 flagged findings
Reported transactions (Form 4)80since Mar 15, 2023 · and 6 other holdings
Corporate events (8-K)30since Apr 18, 2018
What the record says
Description, identity and filings, each with its source.
Every block cites its source. The colour of a finding marks its category — which document, who filed it — not how much it matters.
What the company does
Ambarella, Inc. is an American fabless semiconductor design company, focusing on low-power, high-definition (HD) and Ultra HD video compression, image processing, and computer vision processors. Ambarella's products are used in a wide variety of human and computer vision applications, including video security, advanced driver assistance systems (ADAS), electronic mirror, drive recorder, driver and in-cabin monitoring, autonomous driving, and robotics applications. Ambarella's system on chips (SoCs) are designed to deliver a combination of video compression, image processing, and computer vision performance with low-power operation to enable cameras to extract data from high-resolution video streams.
Source: Wikipedia (CC BY-SA 4.0) · copied on Sep 3, 2026 · may not reflect recent changes.
Regulatory history
Topics detected in its SEC reports, with the original excerpt.
Each topic is assigned by a classifier over the full filing; the excerpts show where it was detected and are not always enough to verify it. Open the filing to read it in full.
- 2026-06-02export control restrictionsrecentOpen filing ↗“…and European leaders. Changes in U.S. trade policy could trigger retaliatory actions by Russia, its allies and other affected…”
+1 more passage from the same document
- “…Industry and Security, or BIS, of the U.S. Department of Commerce, or Commerce, imposes on Hong Kong the same stringent export and…”
- 2026-06-02capital return (buybacks/dividends)recentOpen filing ↗“…2026, the following ordinary shares were reserved for future issuance under the Company’s equity plans and employee stock purchase…”
+1 more passage from the same document
- “…agreement, the Company agreed to refund $ 4.5 million of the $ 13.5 million deposit previously received from the customer . The…”
- 2026-06-02Department of Justice inquiryrecentOpen filing ↗“…California has adopted the California Consumer Privacy Act of 2018, or CCPA, which took effect in 2020. The CCPA was…”
- 2026-03-23export control restrictionsrecentOpen filing ↗“…and European leaders. Changes in U.S. trade policy could trigger retaliatory actions by Russia, its allies and other affected…”
+1 more passage from the same document
- “…products. To date, we have not incurred significant expenditures relating to environmental compliance at our facilities nor have we…”
- 2026-03-23capital return (buybacks/dividends)recentOpen filing ↗“…performance of our ordinary shares. Comparison of 5-year Cumulative Total Return Dividends We have never declared or paid any…”
+1 more passage from the same document
- “…There were no shares repurchased in fiscal years 2025 and 2024. In the first quarter of fiscal year 2026, we repurchased a…”
- 2026-03-23Department of Justice inquiryrecentOpen filing ↗“…California has adopted the California Consumer Privacy Act of 2018, or CCPA, which took effect in 2020. The CCPA was…”
Original excerpts from SEC filings, untranslated. Not advice and not a prediction.
The 25 most recent filings (of 1,406)
Every SEC filing, newest first, with what it is. Below, each type with its own explanation.
- Sep 28, 26Form 4 ↗Insider transaction
- Sep 25, 26Form 144 ↗Notice of proposed sale
- Sep 21, 26Form 4 ↗Insider transaction
- Sep 18, 26Form 144 ↗Notice of proposed sale
Insider transaction · 11 Form 4 filingsshow all 11hide
- Sep 18, 26Form 4 ↗Insider transaction
- Sep 18, 26Form 4 ↗Insider transaction
- Sep 18, 26Form 4 ↗Insider transaction
- Sep 18, 26Form 4 ↗Insider transaction
- Sep 10, 26Form 4 ↗Insider transaction
- Sep 10, 26Form 4 ↗Insider transaction
- Sep 10, 26Form 4 ↗Insider transaction
- Sep 10, 26Form 4 ↗Insider transaction
- Sep 10, 26Form 4 ↗Insider transaction
- Sep 10, 26Form 4 ↗Insider transaction
- Sep 10, 26Form 4 ↗Insider transaction
- Sep 4, 2610-Q ↗Quarterly report
- Sep 3, 268-K ↗Current report · Results
- Aug 14, 26SCHEDULE 13G ↗Passive stake · T. Rowe Price Associates, Inc. · 5.9% · event on Jun 30, 26
- Aug 7, 26SCHEDULE 13G ↗Passive stake · STATE STREET CORPORATION · 5.8% · event on Jun 30, 26
- Jul 31, 26SCHEDULE 13G ↗Passive stake · Vanguard Capital Management · 5.0% · event on Jun 30, 26
- Jul 10, 26Form 4 ↗Insider transaction
- Jul 9, 26Form 144 ↗Notice of proposed sale
- Jul 1, 26Form 144 ↗Notice of proposed sale
1,406 filings on record, the oldest from Oct 9, 12.
Listing the 25 most recent filings of the 1,406 on record.
834
6 senior executive changes2025 – 2026show all 6hide
- Jul 1, 26A senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
- Feb 27, 26A senior executive left or was appointed8-K 5.02 ↗
- Feb 26, 26A senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
- Nov 25, 25A senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
- Apr 4, 25A senior executive left or was appointed8-K 5.02 ↗
- Feb 28, 25A senior executive left or was appointed8-K 5.02 ↗
- Dec 27, 24Entered a material agreement8-K 1.01 ↗
11 senior executive changes2021 – 2024show all 11hide
- Jun 17, 24A senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
- May 3, 24A senior executive left or was appointed8-K 5.02 ↗
- Feb 28, 24A senior executive left or was appointed8-K 5.02 ↗
- Oct 18, 23A senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
- Mar 2, 23A senior executive left or was appointed8-K 5.02 ↗
- Apr 27, 22A senior executive left or was appointed8-K 5.02 ↗
- Apr 25, 22A senior executive left or was appointed8-K 5.02 ↗
- Mar 28, 22A senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
- Mar 21, 22A senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
- Feb 1, 22A senior executive left or was appointed8-K 5.02 ↗
- Nov 9, 21A senior executive left or was appointed8-K 5.02 ↗
- Nov 8, 21Completed an acquisition or disposal+1 more in the same filing8-K 2.01 ↗
- Oct 26, 21Entered a material agreement+1 more in the same filing8-K 1.01 ↗
3 senior executive changes2021show all 3hide
- Sep 8, 21A senior executive left or was appointed8-K 5.02 ↗
- Jun 23, 21A senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
- Mar 4, 21A senior executive left or was appointed8-K 5.02 ↗
- Aug 15, 19Entered a material agreement8-K 1.01 ↗
6 senior executive changes2018 – 2019show all 6hide
- Mar 6, 19A senior executive left or was appointed8-K 5.02 ↗
- Nov 30, 18A senior executive left or was appointed8-K/A 5.02 ↗
- Oct 18, 18A senior executive left or was appointed8-K 5.02 ↗
- Aug 6, 18A senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
- Jun 7, 18A senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
- Apr 18, 18A senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
The record reaches back to Mar 7, 13.
Corporate events are tracked from 2004-08-23, when the SEC renumbered 8-K items. Earlier filings use an incompatible numbering and are not classified here.
Schedule 13G: short-form filing
The short form, for holders who meet specific requirements: institutional investors, passive investors without a control purpose, or exempt investors. Asset managers and index funds usually file it.
- The Vanguard Group12.7%Dec 31, 25SCHEDULE 13G/A ↗
- Vanguard Portfolio Management8.6%Mar 31, 26SCHEDULE 13G ↗
- BlackRock, Inc.7.3%Mar 31, 25SCHEDULE 13G/A ↗
- T. Rowe Price Associates, Inc.5.9%Jun 30, 26SCHEDULE 13G ↗
- STATE STREET CORPORATION5.8%Jun 30, 26SCHEDULE 13G ↗
show one more holderhide
- Vanguard Capital Management5.0%Jun 30, 26SCHEDULE 13G ↗
Structured 13D/G data starts 2023-12, when the SEC moved these filings to a machine-readable format. Earlier filings exist but are not parsed here.
Sale intention announced
On Sep 25, PAISLEY CHRISTOPHER B filed notice of intent to sell up to $18K. It is filed under a scheduled plan (10b5-1), arranged in advance.
A notice is not a sale: it may not go ahead, may happen in part, or at a different price.
After the notice, they sold $18K on Sep 25, per their Form 4. That is 100% of the shares announced so far, and the window is still open.
View notice (Form 144) ↗+5 more recent notices · 5 with a later sale
- Sep 25, 26Sell$18KCHRISTOPHER B PAISLEY↗
- Sep 18, 26Sell$128KJohn Alexander YoungCFO↗
- Sep 17, 26Sell$203KJohn Alexander YoungCFO↗
- Sep 17, 26Sell$188KChan W LeeChief Operations Officer↗
- Sep 17, 26Sell$130KChi-Hong JuSenior VP, Systems & GM↗
- Sep 17, 26Sell$395KFeng-Ming WangCEO↗
- Jul 9, 26Sell$469KYun-Lung ChenVP, Business Dev. & Marketing↗
- Jul 1, 26Sell$1.5MFeng-Ming WangCEO↗
- Jul 1, 26Sell$888KChi-Hong JuSenior VP, Systems & GM↗
- Jun 26, 26Sell$16KCHRISTOPHER B PAISLEY↗
- Jun 17, 26Sell$421KFeng-Ming WangCEO↗
- Jun 17, 26Sell$137KChi-Hong JuSenior VP, Systems & GM↗
There are 13 more transactions in this stretch.
Stock compensation, tax and giftsshow the 15 other transactionshide
Stock compensation, tax withholding, option exercises and gifts. They are listed separately and are not included in the purchase and sale totals. The type describes the transaction, not the filer's intent.
- Sep 8, 26Compensationamount n/aCHRISTOPHER B PAISLEY↗
- Sep 8, 26Compensationamount n/aDAVID JEFFREY RICHARDSON↗
- Sep 8, 26Compensationamount n/aHsiao-Wuen Hon↗
- Sep 8, 26Compensationamount n/aElizabeth M Schwarting↗
- Sep 8, 26Compensationamount n/aChantelle Yvette Breithaupt↗
- Sep 8, 26Compensationamount n/aGregory M Bryant↗
- Sep 8, 26Compensationamount n/aChenming Hu↗
- Jun 17, 26Giftamount n/aFeng-Ming WangCEO↗
- May 26, 26Compensation$22KJohn Alexander YoungCFO↗
- Mar 18, 26Compensationamount n/aFeng-Ming WangCEO↗
- Mar 18, 26Compensationamount n/aChi-Hong JuSenior VP, Systems & GM, Asia↗
- Mar 18, 26Compensationamount n/aChan W LeeChief Operations Officer↗
- Mar 18, 26Compensationamount n/aYun-Lung ChenVP, Business Development and M↗
- Mar 18, 26Compensationamount n/aJohn Alexander YoungCFO↗
- Mar 17, 26Compensationamount n/aFeng-Ming WangCEO↗
The full record holds 297 transactions and goes back to Mar 2, 23.
Its sector and its market
Ambarella, Inc. among Information Technology companies
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- SEC records
- 1,406 documents on file, from Oct 9, 2012 to Sep 28, 2026.
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- Wikipedia, read on Sep 3, 2026.
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Those filed with the SEC by the company, its insiders and its major shareholders, within our coverage: periodic reports (10-K, 10-Q, 20-F), material events (8-K), proposed sale notices (Form 144), insider transactions (Form 4) and stakes above 5% (13D/13G). Each links to the original on EDGAR.
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