Every Form 4 that Alpha and Omega Semiconductor Limited (AOSL) has filed with the SEC in the last 12 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A Form 4 covers the transactions officers, directors and large holders report, so if you follow AOSL and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full AOSL filings page.
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 & 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.
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 and 10% owner Mike F. Chang reported an internal equity transfer. On July 13, 2026 he made a bona fide gift of 23,754 common shares to the CHANG TRUST for no consideration and remains the beneficial owner. Following the transfer he holds 3,560,540 shares directly and 799,786 shares indirectly through the trust, plus additional unvested PSU, MSU and RSU awards.
Alpha & Omega Semiconductor executive vice president of worldwide sales and business development Bing Xue reported an open-market sale of 4,916 common shares at $47.09 per share on June 16, 2026, executed under a pre-arranged Rule 10b5-1 trading plan adopted on August 14, 2025.
Following this transaction, Xue directly owns 123,660 shares, which include 18,750 unvested Performance Share Unit shares, 22,500 unvested Market-Based Performance Share Unit shares, 38,750 shares subject to Restricted Share Unit awards that will be issued as they vest, and 875 shares acquired through the company’s Employee Stock Purchase Plan.
Alpha & Omega Semiconductor director and 10% owner Mike F. Chang reported a bona fide gift of 30,000 Common Shares at $0.00 per share. After this gift, he holds 3,584,294 Common Shares directly and 776,032 Common Shares indirectly through the CHANG TRUST.
The indirect holdings include 35,625 unvested shares under performance share units granted in 2024 and 2025, 45,000 unvested shares under market-based performance share units granted in 2018, and 67,500 shares subject to restricted share unit awards that will be issued as the units vest.
ALPHA & OMEGA SEMICONDUCTOR Ltd director and 10% owner Mike F. Chang reported an internal share transfer involving a bona fide gift of common shares. On May 26, 2026, he transferred 39,780 common shares for no consideration as a gift.
These shares were moved to the CHANG TRUST, where he serves as trustee and his immediate family members are the sole beneficiaries. After the transfer, he directly holds 3,614,294 common shares and indirectly holds 776,032 common shares through the trust, while remaining the beneficial owner of the trust’s shares. The filing also notes unvested performance and restricted share units that may vest over time, but no option exercises or open-market trades.
ALPHA & OMEGA SEMICONDUCTOR Ltd director and 10% owner Mike F. Chang reported an internal share transfer. On May 22, 2026, he made a bona fide gift of 736,252 common shares to the CHANG TRUST for no consideration. A footnote states he is trustee of the trust, his immediate family members are the sole beneficiaries, and he remains the beneficial owner of the trust’s shares. After the transaction, he directly holds 3,654,074 common shares and indirectly holds 736,252 common shares through the trust, so his overall economic exposure is unchanged.
Alpha & Omega Semiconductor director Claudia Chen reported selling a total of 4,061 common shares on May 22, 2026 in open-market transactions. The shares were sold at weighted average prices of $39.4742 and $40.5406 per share. The sales were carried out under a Rule 10b5-1 trading plan adopted on February 20, 2026, indicating they were pre-arranged. Following these transactions, Chen continues to directly hold between 28,192 and 28,409 common shares.
ALPHA & OMEGA SEMICONDUCTOR Ltd Chief Executive Officer Stephen Chunping Chang reported a bona fide gift of 2,000 common shares on May 21, 2026 at a stated price of $0.00 per share. After this charitable transfer, he directly holds 634,070 common shares, including substantial unvested MSU, PSU, and RSU awards that continue to align his interests with shareholders.
ALPHA & OMEGA SEMICONDUCTOR Ltd executive vice president of worldwide sales and business development, Bing Xue, sold 4,916 common shares in an open-market transaction at $41.00 per share. The sale was executed on May 18, 2026 under a pre-arranged Rule 10b5-1 trading plan.
After the sale, Xue directly holds 127,701 common shares, including unvested equity awards. These holdings comprise 18,750 shares tied to performance share units granted in 2024 and 2025, 22,500 shares tied to market-based performance share units granted in 2018, and 38,750 shares from restricted share unit awards granted between 2023 and 2026.
ALPHA & OMEGA SEMICONDUCTOR Ltd CFO Yifan Liang reported two bona fide gifts of common shares. On April 27 and 28, he gifted 300 shares each day, for a total of 600 shares, at a stated price of $0.00 per share.
After these gifts, Liang directly holds 269,403 common shares. This figure includes 22,500 unvested shares from a market-based performance share unit grant dated July 1, 2018, 25,625 unvested shares from performance share unit grants dated March 15, 2024 and March 17, 2025, and 52,500 shares subject to restricted share unit awards granted between March 15, 2023 and March 16, 2026.
The holding figure excludes an additional 22,500 unvested common shares from a performance share unit grant dated March 16, 2026 that may vest only if specified corporate performance goals are achieved in the future.
ALPHA & OMEGA SEMICONDUCTOR Ltd CFO and Corporate Secretary Yifan Liang executed an open-market sale of 8,625 common shares at a weighted average price of $35.0004 per share under a pre-arranged Rule 10b5-1 trading plan. After this transaction, Liang directly holds 270,003 shares, which include substantial unvested equity awards such as market-based performance share units, performance share units, and restricted share units that remain subject to future vesting conditions.
Alpha & Omega Semiconductor’s Chief Executive Officer Stephen Chunping Chang reported open-market sales of a total of 14,884 common shares of AOSL on April 17, 2026. The trades were executed at prices between $32.90 and $34.90 per share under a pre-arranged Rule 10b5-1 trading plan.
Following these sales, Chang continues to hold a large equity position, including substantial unvested awards such as market-based performance share units, performance share units, and restricted share units that may vest over time if service and performance conditions are met.
Alpha & Omega Semiconductor executive vice president of worldwide sales and business development, Bing Xue, completed an open-market sale of 1,832 common shares at $31.21 per share under a pre-arranged Rule 10b5-1 trading plan. After the sale, Xue directly holds 132,617 shares, which the disclosure notes include 22,500 unvested market-based performance share units, 18,750 unvested performance share units, and 38,750 shares subject to restricted share unit awards, while excluding 15,000 unvested common shares tied to a separate performance share unit grant.
Alpha & Omega Semiconductor CFO Yifan Liang sold common shares of AOSL in pre-planned trades. On April 14, 2026, he completed open-market sales totaling 26,517 common shares at prices around $29, $30, and about $32.00 per share under a Rule 10b5-1 trading plan adopted on August 21, 2025.
After these transactions, Liang directly holds 278,628 common shares, plus significant unvested equity awards. These include 22,500 market-based performance share units, 25,625 performance share units, and 52,500 restricted share units that may vest over time if service and performance conditions are met.
ALPHA & OMEGA SEMICONDUCTOR Ltd Chief Executive Officer Stephen Chunping Chang sold 5,594 common shares on April 14, 2026 in an open-market transaction at $31.90 per share. The sale was made under a pre‑arranged Rule 10b5-1 trading plan adopted on September 8, 2025.
Following the sale, he directly holds 650,785 common shares, which include 22,500 unvested Market-Based Performance Share Units, 79,375 unvested Performance Share Units, and 161,250 shares tied to Restricted Share Unit awards. This figure excludes 67,500 unvested common shares under a later PSU grant that depend on future corporate performance goals.
ALPHA & OMEGA SEMICONDUCTOR Ltd Chief Operating Officer Wenjun Li reported routine equity compensation and tax-related share movements. On 2026-03-16, Li received an award of 10,000 Common Shares, increasing direct holdings to 86,558 shares. On the same date, a total of 5,607 shares were disposed of at $21.43 per share to satisfy tax withholding obligations tied to vesting Performance Share Units and Restricted Share Units, rather than through open-market sales. This amended filing corrects earlier errors in the reported number of tax-withholding shares.
ALPHA & OMEGA SEMICONDUCTOR Ltd director Mike F. Chang filed an amended insider report covering restricted share unit activity. On March 16, 2026, 14,419 Common Shares were disposed of to cover tax withholding on RSU vesting, and 22,500 Common Shares were acquired as a grant. After these changes, Chang directly held 4,390,326 Common Shares. The amendment corrects the number of shares previously reported as withheld for taxes and does not reflect any open-market buying or selling.
Alpha & Omega Semiconductor’s Chief Operating Officer Wenjun Li reported equity compensation changes. On March 16, 2026, Li received two grants of 10,000 common shares each at no cost, structured as Restricted Share Units that vest in equal annual installments over four years from March 16, 2026, subject to continued service.
The company withheld 3,272 and 2,267 common shares at $21.43 per share to cover tax obligations upon vesting of prior RSU and Performance Share Unit awards. After these transactions, Li directly holds 86,626 common shares. Footnotes note additional unvested awards, including 7,500 market-based PSUs granted in 2018, 12,500 PSUs granted in 2024 and 2025, and 25,000 RSUs granted from 2023–2026, plus a 10,000-share PSU granted March 16, 2026 that vests only if future corporate performance goals are achieved.
ALPHA & OMEGA SEMICONDUCTOR Ltd EVP Xue Bing reported mixed share transactions involving sales, equity awards, and tax withholding. On March 16, 2026, he sold 2,408 common shares in an open-market transaction at $21.92 per share under a pre-arranged Rule 10b5-1 trading plan.
On the same date, he received two equity grants totaling 30,000 common shares at no cash cost, described as grant or award acquisitions. The company withheld 9,182 shares at $21.43 per share to cover tax obligations related to vesting of Restricted Share Units and Performance Share Units, which is not an open-market sale.
After these transactions, Xue Bing directly held 134,449 common shares. This position includes unvested Market-Based Performance Share Units, Performance Share Units, and multiple Restricted Share Unit awards that will vest over time if continued service and specified performance and service conditions are met.
ALPHA & OMEGA SEMICONDUCTOR Ltd CFO and Corporate Secretary Yifan Liang reported equity compensation and related tax withholding transactions in common shares. Liang received two grants of 22,500 Restricted Share Units each, awarded at no cash cost, which are scheduled to vest in equal annual installments over four years from March 16, 2026, contingent on continued service. The filing also shows a total of 11,499 shares withheld at $21.43 per share to cover tax obligations upon vesting of earlier RSU and Performance Share Unit awards. After these grants and withholdings, Liang directly holds 305,145 common shares, which include various unvested MSU, PSU and RSU awards that vest over time based on service and, for some awards, corporate performance goals.
Alpha & Omega Semiconductor CEO Stephen Chunping Chang reported equity compensation and related tax withholding transactions involving the company’s common shares. On March 16, 2026, he received two grants totaling 135,000 common shares at no cost, structured as restricted and performance-based share units that vest over multiple years, subject to continued service and corporate performance goals.
On the same date, a total of 43,483 shares were withheld at $21.43 per share to cover tax obligations arising from vesting of earlier restricted and performance share unit awards. After these grants and tax withholdings, Chang directly owns 656,379 common shares, in addition to various unvested RSU, PSU, and MSU awards that may settle in shares as vesting and performance conditions are met.
ALPHA & OMEGA SEMICONDUCTOR Ltd director and 10% owner Mike F. Chang reported equity compensation activity involving common shares. On March 16, 2026, he received two stock awards totaling 45,000 common shares at no cost, described as Restricted Share Unit grants that vest in equal annual installments over four years from that date, subject to continued service.
On the same date, the issuer withheld 27,813 common shares at $21.43 per share to cover tax obligations upon the vesting of earlier RSU and Performance Share Unit grants. After these grant and tax-withholding entries, Chang directly holds 4,364,261 common shares, including multiple unvested RSU, PSU, and market-based PSU awards that remain subject to service-based and, in some cases, performance-based vesting conditions.
ALPHA & OMEGA SEMICONDUCTOR Ltd director and 10% owner Mike F. Chang made an open-market purchase of 33,727 common shares at $19.00 per share. This buy on March 9, 2026 increased his direct holdings to 4,369,574 common shares.
His reported position includes 41,670 unvested shares from performance share units granted on March 15, 2022 and March 15, 2024, 45,000 unvested shares from MSUs, and 86,875 shares underlying restricted share unit awards that will be issued as they vest. It excludes 22,500 unvested common shares tied to a performance share unit grant from March 17, 2025 that vest only if certain corporate performance goals are achieved.
Alpha & Omega Semiconductor executive vice president of worldwide sales and business development, Bing Xue, sold 2,460 common shares in an open-market transaction at $22.33 per share. After this sale, Xue still holds 116,039 common shares, reflecting a substantial ongoing stake in the company.
The transaction was carried out under a pre-arranged Rule 10b5-1 trading plan adopted by Xue on August 14, 2025. The reported holdings include unvested equity awards, such as performance share units, market-based performance share units, and restricted share units that vest over time or upon meeting performance conditions.
Alpha & Omega Semiconductor executive Bing Xue reported a small insider sale of company stock. On 01/15/2026, the EVP – Worldwide Sales & Business Development sold 737 common shares of ALPHA & OMEGA SEMICONDUCTOR Ltd at a price of $22.43 per share under transaction code "S".
The filing states that this sale was effected under a pre-arranged Rule 10b5-1 trading plan adopted on August 14, 2025. After the transaction, Xue beneficially owns 118,499 common shares. This total includes 14,154 unvested shares from performance share units granted on March 15, 2022 and March 15, 2024, 22,500 unvested market-based performance share units granted on July 1, 2018, and 40,000 shares underlying restricted share unit awards granted between March 15, 2022 and March 17, 2025.
Alpha & Omega Semiconductor Ltd officer and CFO and corporate secretary Yifan Liang reported a transaction involving 500 common shares of the company on 12/15/2025. The transaction, coded “G,” was reported at a price of $0 per share and left Liang with beneficial ownership of 280,271 common shares held directly.
The reported beneficial ownership includes 16,512 unvested shares from performance share units granted on March 15, 2022 and March 15, 2024, 45,000 unvested shares from a market-based performance share unit grant dated July 1, 2018, and 50,000 shares subject to restricted share unit awards granted on March 15, 2022, March 15, 2023, March 15, 2024, and March 17, 2025. It also reflects 235 shares acquired under the employee stock purchase plan on November 14, 2025 and excludes 22,500 unvested common shares subject to a March 17, 2025 performance share unit grant.
Alpha & Omega Semiconductor executive Bing Xue reported a sale of company stock. On 12/15/2025, the EVP, WW Sales & Business Development sold 1,845 common shares at $20.56 per share under a Rule 10b5-1 trading plan adopted on August 14, 2025.
After this transaction, Xue beneficially owns 127,863 common shares. This includes 14,154 unvested shares from performance share units granted on March 15, 2022 and March 15, 2024, 45,000 unvested shares from market-based performance share units granted on July 1, 2018, and an aggregate of 40,000 shares subject to restricted share unit awards granted on March 15, 2022, March 15, 2023, March 15, 2024, and March 17, 2025. It excludes 15,000 unvested common shares from a March 17, 2025 performance share unit grant that may vest upon achievement of corporate performance goals.
Alpha & Omega Semiconductor Ltd. (AOSL) executive vice president of worldwide sales and business development, Bing Xue, reported a sale of company stock on 11/14/2025. The Form 4 shows a disposition of 1,845 common shares at a price of $18.16 per share in an open-market transaction coded "S" for sale. The filing notes that this transaction was carried out under a Rule 10b5-1 trading plan adopted on August 14, 2025, which is a pre-arranged program for trading shares. Following this transaction, Xue beneficially owns 129,708 shares, including unvested performance share units, market-based performance share units, restricted share units, and shares acquired under the employee stock purchase plan.
Alpha & Omega Semiconductor (AOSL) reported a director equity award on Form 4. On 11/11/2025, the reporting person acquired 5,681 common shares subject to restricted share units (code A) at a price of $0 under the company’s 2018 Omnibus Incentive Plan. Following this grant, the director beneficially owns 23,800 shares directly.
The RSUs vest in four equal quarterly installments, each tied to completion of a quarter of Board service after the grant date. This filing reflects routine director compensation in equity rather than an open‑market purchase.
Alpha & Omega Semiconductor (AOSL) reported an insider equity award. On 11/11/2025, a Director received 5,681 common shares via a restricted share unit (RSU) grant at a reported price of $0 per share (Transaction Code: A).
The award was granted for Board service under the company’s 2018 Omnibus Incentive Plan and will vest in four equal quarterly installments following the grant date, contingent on continued Board service. Following this grant, the Director beneficially owned 23,800 common shares, held directly.
Alpha & Omega Semiconductor (AOSL) reported an insider equity grant. A director acquired 5,681 common shares on 11/11/2025 through a restricted share unit (RSU) award at $0 per share. Following this transaction, the director’s beneficial ownership is 71,294 shares, held directly.
The RSU award was granted for Board service under the company’s 2018 Omnibus Incentive Plan and will vest in four successive equal quarterly installments upon completion of each quarter of Board service after the grant date.
Alpha & Omega Semiconductor (AOSL) — Form 4 filing: A director reported an award of 5,681 restricted share units (RSUs) on 11/11/2025, coded “A” at a price of $0 under the company’s 2018 Omnibus Incentive Plan. The RSUs vest in four equal quarterly installments following the grant date.
Following this transaction, the reporting person beneficially owned 30,885 common shares, held directly.
Alpha & Omega Semiconductor (AOSL) reported a director equity grant on a Form 4. On 11/11/2025, the reporting person acquired 5,681 common shares in the form of restricted share units (RSUs) at $0 per share as part of Board compensation under the company’s 2018 Omnibus Incentive Plan.
Following this grant, the reporting person beneficially owned 64,824 common shares. The filing states the RSUs will vest in four equal quarterly installments, each tied to the completion of a quarter of Board service after the grant date.
Alpha & Omega Semiconductor (AOSL) reported a director equity award. On 11/11/2025, the reporting person acquired 5,681 common shares at $0 via a restricted share unit (RSU) grant under the company’s 2018 Omnibus Incentive Plan.
Following the transaction, the reporting person beneficially owned 32,253 shares, held directly. The RSUs will vest in four successive equal quarterly installments upon completion of each quarter of Board service following the grant date.
Alpha & Omega Semiconductor (AOSL) reported a Form 4 showing a disposition of 40,000 common shares on 10/20/2025 at $0 under transaction code G.
Following the transaction, the reporting person beneficially owned 4,352,547 shares, held directly. Footnotes state this includes 86,875 shares subject to RSUs granted on March 15, 2022, March 15, 2023, March 15, 2024, and March 17, 2025 as they vest; 90,000 unvested shares subject to a market-based PSU granted on July 1, 2018; and 41,670 unvested shares subject to PSUs granted on March 15, 2022 and March 15, 2024. It excludes 22,500 unvested common shares subject to a PSU granted on March 17, 2025 that vest upon achievement of corporate performance goals.
The reporting person is listed as a Director and 10% Owner, and the filing was made as a single reporting person.
Alpha & Omega Semiconductor (AOSL) disclosed a Form 4 by CFO and Corporate Secretary Yifan Liang. On 10/17/2025, Liang reported a Code G transaction, a gift of 300 common shares at $0. After the transaction, Liang beneficially owned 280,536 shares directly.
Holdings include 45,000 unvested MSUs granted 7/1/2018 (service-based vesting), 16,512 unvested PSUs from 3/15/2022 and 3/15/2024 (service-based), and 50,000 RSUs granted on 3/15/2022, 3/15/2023, 3/15/2024, and 3/17/2025 that will be issued as they vest. It excludes 22,500 unvested PSUs granted 3/17/2025, which may vest upon achievement of corporate performance goals. ESPP activity reflects 875 shares acquired on 5/14/2025.