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ALGM SEC Filing News — Allegro MicroSystems, Inc.

Latest SEC filings for Allegro MicroSystems, Inc. (ALGM) explained in plain English: insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). Sourced directly from SEC EDGAR.

What you’re looking at: Each item below is parsed from an actual SEC filing. Form 4 = confirmed insider transaction · Form 144 = proposed sale notice · 8-K = material event (earnings, M&A, leadership change, etc.) · 10-Q / 10-K = quarterly / annual report.
Form 4 Insider Selling 2026-05-26

ALGM insider Coleman Troy (SVP, General Manager, Products) sold 4,500 shares (~$205.7K)

Coleman Troy, listed as SVP, General Manager, Products at ALLEGRO MICROSYSTEMS, INC., reported an open-market sale of 4,500 ALGM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

Filing: Form 4 (Insider Transaction) Insider: Coleman Troy (SVP, General Manager, Products) Shares: 4,500 Est. Value: $205.7K
Form 4 Insider Selling 2026-05-22

ALGM insider Webster Roald Graham (VP, Chief Accounting Officer) sold 5,217 shares (~$234.2K)

Webster Roald Graham, listed as VP, Chief Accounting Officer at ALLEGRO MICROSYSTEMS, INC., reported an open-market sale of 5,217 ALGM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

Filing: Form 4 (Insider Transaction) Insider: Webster Roald Graham (VP, Chief Accounting Officer) Shares: 5,217 Est. Value: $234.2K
Form 144 Proposed Insider Sale 2026-05-22

ALGM Form 144 filed for proposed insider sale by Coleman Troy (4,500 shares) ~$411.5K

Coleman Troy filed a Form 144 with the SEC indicating intent to sell ALGM (ALLEGRO MICROSYSTEMS, INC.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Coleman Troy Shares: 4,500 Est. Value: $411.5K
Form 10-K Annual Report 2026-05-21

ALGM filed Annual Report (10-K)

ALLEGRO MICROSYSTEMS, INC. filed its annual report with the SEC. This report includes audited financial statements, business overview, risk factors, and management discussion.

Filing: 10-K (Annual Report)
Form 4 Tax / Compensation Filing 2026-05-19

ALGM insider Form 4 filed for equity award, exercise, or tax withholding

Hagen Erin (SVP, CHRO) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: Hagen Erin (SVP, CHRO) Shares: 5,815
Form 4 Insider Selling 2026-05-19

ALGM insider Kent Ian (SVP, Global Operations) sold 2,642 shares (~$109.8K)

Kent Ian, listed as SVP, Global Operations at ALLEGRO MICROSYSTEMS, INC., reported an open-market sale of 2,642 ALGM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

Filing: Form 4 (Insider Transaction) Insider: Kent Ian (SVP, Global Operations) Shares: 2,642 Est. Value: $109.8K
Form 4 Tax / Compensation Filing 2026-05-19

ALGM insider Form 4 filed for equity award, exercise, or tax withholding

D'Antilio Derek (EVP, CFO & Treasurer) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: D'Antilio Derek (EVP, CFO & Treasurer) Shares: 37,840
Form 4 Tax / Compensation Filing 2026-05-19

ALGM insider Form 4 filed for equity award, exercise, or tax withholding

Madormo Richard (SVP, Worldwide Sales) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: Madormo Richard (SVP, Worldwide Sales) Shares: 5,439
Form 4 Tax / Compensation Filing 2026-05-19

ALGM insider Form 4 filed for equity award, exercise, or tax withholding

Webster Roald Graham (VP, Chief Accounting Officer) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: Webster Roald Graham (VP, Chief Accounting Officer) Shares: 4,277
Form 4 Tax / Compensation Filing 2026-05-19

ALGM insider Form 4 filed for equity award, exercise, or tax withholding

Doogue Michael (Director, President and CEO) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: Doogue Michael (Director, President and CEO) Shares: 60,508
Form 4 Tax / Compensation Filing 2026-05-19

ALGM insider Form 4 filed for equity award, exercise, or tax withholding

Briansky Sharon (SVP, GC and Secretary) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: Briansky Sharon (SVP, GC and Secretary) Shares: 13,942
Form 4 Tax / Compensation Filing 2026-05-19

ALGM insider Form 4 filed for equity award, exercise, or tax withholding

Coleman Troy (SVP, General Manager, Products) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: Coleman Troy (SVP, General Manager, Products) Shares: 9,670
Form 144 Proposed Insider Sale 2026-05-18

ALGM Form 144 filed for proposed insider sale by Kent Ian (2,642 shares) ~$219.6K

Kent Ian filed a Form 144 with the SEC indicating intent to sell ALGM (ALLEGRO MICROSYSTEMS, INC.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Kent Ian Shares: 2,642 Est. Value: $219.6K
Form 4 Tax / Compensation Filing 2026-05-15

ALGM insider Form 4 filed for equity award, exercise, or tax withholding

Willett Robert (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: Willett Robert (Director) Shares: 1,094
Form 4 Tax / Compensation Filing 2026-05-15

ALGM insider Form 4 filed for equity award, exercise, or tax withholding

Kent Ian (SVP, Global Operations) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: Kent Ian (SVP, Global Operations) Shares: 8,492
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