Welcome to our dedicated page for ALPHA & OMEGA SEMICONDUCTOR SEC filings (Ticker: AOSL), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Our SEC filing database is enhanced with expert analysis from Rhea-AI, providing insights into the potential impact of each filing on ALPHA & OMEGA SEMICONDUCTOR's stock performance. Each filing includes a concise AI-generated summary, sentiment and impact scores, and end-of-day stock performance data showing the actual market reaction. Navigate easily through different filing types including 10-K annual reports, 10-Q quarterly reports, 8-K current reports, proxy statements (DEF 14A), and Form 4 insider trading disclosures.
Designed for fundamental investors and regulatory compliance professionals, our page simplifies access to critical SEC filings. By combining real-time SEC filing updates, Rhea-AI's analytical insights, and historical stock performance data, we provide comprehensive visibility into ALPHA & OMEGA SEMICONDUCTOR's regulatory disclosures and financial reporting.
ALPHA & OMEGA SEMICONDUCTOR Ltd (symbol: AOSL) is the issuer of record for a Form 4 filing submitted to the SEC. Chang Stephen Chunping reported acquisition or exercise transactions in this Form 4 filing.
ALPHA & OMEGA SEMICONDUCTOR Ltd (AOSL) reported that Chief Executive Officer and director Stephen Chunping Chang transferred 100,947 common shares on August 24, 2026 as a bona fide gift to the STEPHEN CHUPING CHANG TTEE TRUST, for no consideration, and continues to be the beneficial owner of those shares held indirectly through the trust.
After this transaction, he reports 100,947 common shares held indirectly via the trust and 634,070 common shares held directly, which include various unvested market-based performance share units, performance share units, and restricted share unit awards.
ALPHA & OMEGA SEMICONDUCTOR Ltd (AOSL) insider Mike F. Chang, a director and more-than-10% owner, reported a bona fide gift transfer of 100,947 common shares on August 24, 2026 from the CHANG Trust for no consideration. The trust’s beneficiaries are his immediate family, and he remains the beneficial owner of the trust’s holdings, which total 3,698,839 common shares after the gift. He also directly holds 560,540 common shares, including unvested MSUs, PSUs and RSUs that are subject to service-based and performance-based vesting conditions.
Alpha and Omega Semiconductor Limited (AOSL) describes a diversified power semiconductor business focused on MOSFETs, power ICs, IGBTs and SiC devices for computing, AI/data centers, consumer, communications, power supply and industrial markets. The company offers about 2,900 products, introduced over 70 new products in fiscal 2026, and relies on a mix of in-house and foundry manufacturing plus internal packaging and test capacity of over 600 million parts per month.
AOSL holds a minority interest in a Chongqing joint-venture fab and packaging company; during fiscal 2026 it completed the sale of approximately 20.3% of that JV for $150 million in cash, reducing its stake to 18.9% while retaining guaranteed wafer capacity. The company emphasizes ongoing investment in its Oregon wafer fab and global R&D footprint, with fiscal 2026 research and development spending of $103.9 million and a portfolio of 961 U.S. and 991 foreign patents.
Customer and channel concentration remain notable: as of fiscal 2026 two distributors, WPG and Promate, represented 53.0% and 19.3% of revenue, respectively, and the PC market is still a major end-market amid cyclical demand and memory supply constraints. AOSL operates globally with 2,519 employees, significant operations in China and the U.S., and highlights risks from semiconductor cyclicality, PC market declines, export controls, U.S.–China tensions, and complex China regulatory and data-security regimes.
ALPHA & OMEGA SEMICONDUCTOR Ltd director and ten-percent owner Mike F. Chang reported a bona fide gift transfer of 3,000,000 Common Shares on August 13, 2026 to the CHANG TRUST for no consideration. He is trustee of the trust and his immediate family members are the sole beneficiaries, and he remains the beneficial owner of the shares held by the trust.
Following the transfer, Chang directly holds 560,540 Common Shares and indirectly holds 3,799,786 Common Shares through the CHANG TRUST. The reported holdings include unvested awards: 35,625 Performance Share Units, 45,000 Market-Based Performance Share Units, and 67,500 Restricted Share Units, while 22,500 additional PSU shares remain unvested and excluded.
Alpha and Omega Semiconductor Limited reported fiscal Q4 2026 revenue of $170.4 million, down 3.5% year-over-year but up 4.0% sequentially, with GAAP gross margin of 23.1%. Q4 GAAP net loss was $13.1 million (diluted EPS -$0.43); on a non-GAAP basis, net loss was $4.0 million (EPS -$0.13).
For fiscal 2026, revenue was $678.9 million versus $696.2 million in 2025, while GAAP net loss improved to $42.3 million (EPS -$1.41) from $97.0 million (EPS -$3.30). However, non-GAAP results deteriorated from $7.0 million net income (EPS $0.22) to a $12.9 million net loss (EPS -$0.43), and operating cash flow swung to a $16.3 million use of cash from $29.7 million provided.
The company ended June 30, 2026 with $180.8 million in cash and cash equivalents and total shareholders’ equity of $797.9 million. Management highlighted strong growth in Advanced Computing and AI-related applications, and guided fiscal Q1 2027 revenue to $176 million ± $10 million, with expected GAAP gross margin of 23.8% ±1%, while noting a slight near-term impact from Typhoon Dolphin on Shanghai packaging operations.
Alpha and Omega Semiconductor Limited large shareholder Mike F. Chang filed an amended beneficial ownership report. As of June 30, 2026, he beneficially owned 4,212,201 common shares, representing 13.9% of the company’s outstanding common shares, based on 30,253,076 shares outstanding as of that date.
Chang held 3,436,169 shares with sole voting and dispositive power and 776,032 shares with shared voting and dispositive power. The filing indicates no ownership on behalf of a group or other persons above 5% and notes no applicable certifications or group arrangements.
State Street Corporation and its affiliate SSGA Funds Management, Inc. report significant ownership of Alpha & Omega Semiconductor Ltd common stock. They beneficially own 2,347,448 shares of common stock, representing 7.8% of the class, with shared power over both voting and disposition of these shares and no sole voting or dispositive power. Within this, SSGA Funds Management, Inc. is reported with 1,766,810 shares, or 5.9% of the class. Several State Street Global Advisors entities are identified as investment adviser subsidiaries involved in holding these securities. The filing is executed by senior officers on August 7, 2026.
Chien Joshua C. reported acquisition or exercise transactions in this Form 4 filing.
Alpha & Omega Semiconductor Ltd reports that director Joshua C. Chien was granted restricted share units covering 1,368 common shares on 2026-07-20 at a reported price of $0.0000 per share. The RSUs vest on the same schedule as prior annual director grants, pro rata with his Board service, and 1,368 common shares subject to RSUs are reported as directly owned following this award.
Alpha & Omega Semiconductor Ltd EVP Xue Bing sold 875 common shares on July 16, 2026 at $33.99 per share in an open-market transaction pursuant to a Rule 10b5-1 trading plan adopted on August 14, 2025.
After the sale, Xue Bing directly holds 122,785 shares, including unvested PSUs, MSUs and RSUs described in the footnotes.
Alpha & Omega Semiconductor Ltd director Joshua C. Chien submitted an initial Form 3 reporting his status as a director and potential beneficial owner. The Form 3 does not list any reportable equity holdings or transactions, and it includes an exhibit granting a Power of Attorney for future SEC-related actions.