Key facts
- ALGM - ALLEGRO MICROSYSTEMS, INC. has 33 insiders with reported activity on this page.
- Net insider value flow over the last year: -$5,537,087.
- Recent transaction rows are available for direct filing-level review.
Insider Transactions Reported by 33 Insiders of ALLEGRO MICROSYSTEMS, INC.
- Symbol
- ALGM on Nasdaq
- Location
- Manchester, NH
Change
- Buy value: ; sell value: $5,537,087.
- Net share flow: -143,321.
Research use
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Evidence
Filed on Form 4
See Original Filing
Issuer insider activity is sourced from SEC Forms 3, 4, and 5.
Insider trading overview
Last 12 monthsNet insider flow leans to selling over the last 12 months. Net value: -$5,537,087.
Buys
$0
Shares: 0
Insiders: 0
Sells
$5,537,087
Shares: 143,321
Insiders: 7
Net
-$5,537,087
Shares: -143,321
Insiders: -7
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 75,932 | $0 | $3,381,598 | -$3,381,598 |
| 3-6 | 0 | 37,131 | $0 | $1,220,952 | -$1,220,952 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 30,258 | $0 | $934,537 | -$934,537 |
ALLEGRO MICROSYSTEMS, INC. executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Sanken Electric Co., Ltd. | 10%+ Owner | $1,383,411,231 | Filing P/S | 07 Aug 2024 | ||
| OEP SKNA, L.P. | 10%+ Owner | $494,884,886 | Mixed | 02 Feb 2023 | ||
| Ravi Vig | President and CEO, Director | $91,743,601 | Mixed | 13 Jun 2022 | ||
| Paul V Walsh Jr. | SVP, CFO & Treasurer | $21,871,032 | Mixed | 21 Dec 2021 | ||
| Michael C. Doogue | President and CEO, Director | $16,769,955 | -$1,421,251 | -7.8% | Median | 16 May 2026 |
| Yoshihiro Suzuki | Director | $7,850,465 | Mixed | 07 Aug 2025 | ||
| Derek P. D'Antilio | EVP, CFO & Treasurer | $7,529,773 | Median | 16 May 2026 | ||
| Vineet A. Nargolwala | President and CEO, Director | $7,075,965 | Filing P/S | 05 Nov 2024 | ||
| Reza Kazerounian | Director | $6,163,416 | Mixed | 03 Aug 2023 | ||
| Max R. Glover | SVP of Worldwide Sales | $5,124,362 | Mixed | 18 Nov 2024 | ||
| Christopher Brown | SVP and General Counsel | $4,065,464 | Mixed | 19 Nov 2021 | ||
| Joanne Valente | Svp, Chro | $3,553,173 | Mixed | 17 Nov 2023 | ||
| Suman Narayan | SVP, Products | $3,019,251 | Mixed | 30 Aug 2024 | ||
| Troy Coleman | SVP, General Manager, Products | $2,584,703 | Median | 16 May 2026 | ||
| Sharon S. Briansky | SVP, GC and Secretary | $2,514,612 | -$1,986,777 | -44% | Median | 16 May 2026 |
| Richard Madormo | SVP, Worldwide Sales | $2,354,881 | Median | 16 May 2026 | ||
| Thomas C. Teebagy Jr. | SVP of Operations and Quality | $2,056,341 | Mixed | 18 Nov 2022 | ||
| Joseph R. Martin | Director | $1,293,180 | Mixed | 07 Aug 2025 | ||
| Ian Kent | SVP, Global Operations | $1,055,291 | -$109,802 | -9.4% | Filing P/S | 16 May 2026 |
| Erin E. Hagen | Svp, Chro | $1,051,115 | -$248,171 | -19% | Median | 16 May 2026 |
| David J. Aldrich | Director | $720,002 | Mixed | 08 Aug 2024 | ||
| Mary G. Puma | Director | $642,675 | Mixed | 07 Aug 2025 | ||
| Richard R. Lury | Director | $599,848 | -$506,104 | -46% | Filing P/S | 12 Aug 2025 |
| Roald G. Webster | VP, Chief Accounting Officer | $588,262 | -$505,358 | -46% | Filing P/S | 21 May 2026 |
| Susan D. Lynch | Director | $582,071 | -$759,625 | -57% | Filing P/S | 14 May 2026 |
| Jennie M. Raubacher | Director | $550,517 | Mixed | 07 Aug 2025 | ||
| Krishna G. Palepu | Director | $386,384 | Mixed | 07 Aug 2025 | ||
| Christine King | Director | $347,135 | Mixed | 05 Aug 2021 | ||
| Noriharu Fujita | Director | $281,409 | Mixed | 29 Sep 2021 | ||
| Paul Carl Schorr IV | Director | $274,557 | Mixed | 08 Aug 2024 | ||
| Robert Willett | Director | $34,493 | Median | 13 May 2026 | ||
| Katsumi Kawashima | Director | Mixed | 20 Jun 2022 | |||
| Kojiro Hatano | Director | Mixed | 20 Jun 2022 |
Top shareholders of ALLEGRO MICROSYSTEMS, INC. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| FMR LLC |
13D/G
13F
|
Company |
15%
|
27,421,206
|
$1,043,102,661 | +$143,998,860 | 31 Mar 2026 | |
| Capital Research Global Investors |
13D/G
13F
|
Company |
7.1%
|
13,111,292
|
$410,252,327 | -$87,395,004 | 31 Dec 2025 | |
| JPMORGAN CHASE & CO |
13F
13D/G
|
Company |
4.8%
from 13D/G
|
8,652,068
|
$242,604,037 | — | 31 Mar 2026 | |
| Michael C. Doogue |
3/4/5
|
President and CEO, Director |
0.29%
|
531,873
|
$16,769,955 | -$1,421,251 | 16 May 2026 | |
| Derek P. D'Antilio |
3/4/5
|
EVP, CFO & Treasurer |
0.13%
|
238,813
|
$7,529,773 | — | 16 May 2026 | |
| Yoshihiro Suzuki |
3/4/5
|
Director |
0.12%
|
213,560
|
$7,850,465 | — | 07 Aug 2025 | |
| Troy Coleman |
3/4/5
|
SVP, General Manager, Products |
0.04%
|
81,976
|
$2,584,703 | — | 16 May 2026 | |
| Sharon S. Briansky |
3/4/5
|
SVP, GC and Secretary |
0.04%
|
79,753
|
$2,514,612 | -$1,986,777 | 16 May 2026 | |
| Richard Madormo |
3/4/5
|
SVP, Worldwide Sales |
0.04%
|
74,687
|
$2,354,881 | — | 16 May 2026 | |
| Joseph R. Martin |
3/4/5
|
Director |
0.02%
|
35,179
|
$1,293,180 | — | 07 Aug 2025 | |
| Erin E. Hagen |
3/4/5
|
SVP, CHRO |
0.02%
|
33,337
|
$1,051,115 | -$248,171 | 16 May 2026 | |
| Ian Kent |
3/4/5
|
SVP, Global Operations |
0.01%
|
25,392
|
$1,055,291 | -$109,802 | 16 May 2026 | |
| Richard R. Lury |
3/4/5
|
Director |
0.01%
|
18,857
|
$599,848 | -$506,104 | 12 Aug 2025 | |
| Mary G. Puma |
3/4/5
|
Director |
0.01%
|
17,483
|
$642,675 | — | 07 Aug 2025 | |
| Jennie M. Raubacher |
3/4/5
|
Director |
0.01%
|
14,976
|
$550,517 | — | 07 Aug 2025 | |
| Roald G. Webster |
3/4/5
|
VP, Chief Accounting Officer |
0.01%
|
13,106
|
$588,262 | -$505,358 | 21 May 2026 | |
| Susan D. Lynch |
3/4/5
|
Director |
0.01%
|
12,805
|
$582,071 | -$759,625 | 14 May 2026 | |
| Krishna G. Palepu |
3/4/5
|
Director |
0.01%
|
10,511
|
$386,384 | — | 07 Aug 2025 | |
| Robert Willett |
3/4/5
|
Director |
0%
|
1,094
|
$34,493 | — | 13 May 2026 | |
| BlackRock, Inc. |
13F
|
Company |
6.7%
|
12,494,868
|
$393,963,174 | — | 31 Mar 2026 | |
| Invesco Ltd. |
13F
|
Company |
4.7%
|
8,751,481
|
$275,934,196 | — | 31 Mar 2026 | |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13F
|
Company |
4.3%
|
7,920,042
|
$249,718,924 | — | 31 Mar 2026 | |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
|
Company |
2.9%
|
5,464,718
|
$172,302,559 | — | 31 Mar 2026 | |
| STATE STREET CORP |
13F
|
Company |
2.8%
|
5,228,104
|
$164,842,119 | — | 31 Mar 2026 | |
| Clearbridge Investments, LLC |
13F
|
Company |
1.5%
|
2,863,710
|
$90,292,781 | — | 31 Mar 2026 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
1.3%
|
2,456,820
|
$77,480,560 | — | 31 Mar 2026 | |
| MORGAN STANLEY |
13F
|
Company |
1.2%
|
2,275,285
|
$71,739,824 | — | 31 Mar 2026 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
1.2%
|
2,170,487
|
$68,398,874 | — | 31 Mar 2026 | |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. |
13F
|
Company |
1.1%
|
2,080,641
|
$65,603,000 | — | 31 Mar 2026 | |
| PRINCIPAL FINANCIAL GROUP INC |
13F
|
Company |
0.97%
|
1,790,466
|
$56,453,393 | — | 31 Mar 2026 | |
| ALLIANCEBERNSTEIN L.P. |
13F
|
Company |
0.93%
|
1,723,370
|
$45,462,501 | — | 31 Mar 2026 | |
| LOOMIS SAYLES & CO L P |
13F
|
Company |
0.9%
|
1,674,108
|
$52,784,625 | — | 31 Mar 2026 | |
| ADAGE CAPITAL PARTNERS GP, L.L.C. |
13F
|
Company |
0.79%
|
1,464,737
|
$46,183,158 | — | 31 Mar 2026 | |
| VOYA INVESTMENT MANAGEMENT LLC |
13F
|
Company |
0.79%
|
1,459,271
|
$46,010,815 | — | 31 Mar 2026 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.78%
|
1,437,215
|
$45,315,389 | — | 31 Mar 2026 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.75%
|
1,390,606
|
$43,845,807 | — | 31 Mar 2026 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.56%
|
1,045,541
|
$32,965,909 | — | 31 Mar 2026 | |
| SEGALL BRYANT & HAMILL, LLC |
13F
|
Company |
0.56%
|
1,044,984
|
$32,948,346 | — | 31 Mar 2026 | |
| RAYMOND JAMES FINANCIAL INC |
13F
|
Company |
0.54%
|
995,753
|
$31,396,089 | — | 31 Mar 2026 | |
| Nuveen, LLC |
13F
|
Company |
0.51%
|
947,502
|
$29,874,739 | — | 31 Mar 2026 | |
| KENNEDY CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.49%
|
910,039
|
$28,693,530 | — | 31 Mar 2026 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.46%
|
855,453
|
$26,972,435 | — | 31 Mar 2026 | |
| VANGUARD FIDUCIARY TRUST CO |
13F
|
Company |
0.41%
|
765,886
|
$24,148,386 | — | 31 Mar 2026 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.4%
|
743,292
|
$23,436,011 | — | 31 Mar 2026 | |
| MARSHALL WACE, LLP |
13F
|
Company |
0.4%
|
739,780
|
$23,325,264 | — | 31 Mar 2026 | |
| Aperture Investors, LLC |
13F
|
Company |
0.38%
|
709,674
|
$22,376,021 | — | 31 Mar 2026 | |
| SILVERCREST ASSET MANAGEMENT GROUP LLC |
13F
|
Company |
0.38%
|
707,891
|
$22,319,832 | — | 31 Mar 2026 | |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
|
Company |
0.36%
|
673,096
|
$21,222,716 | — | 31 Mar 2026 | |
| GW&K Investment Management, LLC |
13F
|
Company |
0.36%
|
659,576
|
$20,797,000 | — | 31 Mar 2026 | |
| TWO SIGMA INVESTMENTS, LP |
13F
|
Company |
0.35%
|
639,841
|
$20,174,187 | — | 31 Mar 2026 |
Recent Insider Transactions by Companies or Individuals for ALLEGRO MICROSYSTEMS, INC.
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Roald G. Webster | ALGM | Common Stock | Sale | -28.5% | $234,165 | $44.88 | -5,217 | 13,106 | 21 May 2026 | Direct |
| Ian Kent | ALGM | Common Stock | Sale | -9.42% | $109,802 | $41.56 | -2,642 | 25,392 | 18 May 2026 | Direct |
| Erin E. Hagen | ALGM | Common Stock | Tax liability | -14.8% | -5,815 | 33,337 | 16 May 2026 | Direct | ||
| Ian Kent | ALGM | Common Stock | Tax liability | -7.72% | -2,345 | 28,034 | 16 May 2026 | Direct | ||
| Derek P. D'Antilio | ALGM | Common Stock | Tax liability | -13.7% | -37,840 | 238,813 | 16 May 2026 | Direct | ||
| Richard Madormo | ALGM | Common Stock | Tax liability | -6.79% | -5,439 | 74,687 | 16 May 2026 | Direct | ||
| Roald G. Webster | ALGM | Common Stock | Tax liability | -18.9% | -4,277 | 18,323 | 16 May 2026 | Direct | ||
| Michael C. Doogue | ALGM | Common Stock | Tax liability | -17.8% | -60,508 | 279,076 | 16 May 2026 | Direct | ||
| Sharon S. Briansky | ALGM | Common Stock | Tax liability | -14.9% | -13,942 | 79,753 | 16 May 2026 | Direct | ||
| Troy Coleman | ALGM | Common Stock | Tax liability | -10.6% | -9,670 | 81,976 | 16 May 2026 | Direct | ||
| Susan D. Lynch | ALGM | Common Stock | Sale | -56.6% | $759,625 | $45.46 | -16,711 | 12,805 | 14 May 2026 | Direct |
| Robert J. Willett | ALGM | Common Stock | Award | 1,094 | 1,094 | 13 May 2026 | Direct | |||
| Ian Kent | ALGM | Common Stock | Award | 38.8% | 8,492 | 30,379 | 13 May 2026 | Direct | ||
| Richard Madormo | ALGM | Common Stock | Award | 32.8% | 19,815 | 80,126 | 13 May 2026 | Direct | ||
| Sharon Briansky | ALGM | Common Stock | Award | 24.5% | 18,463 | 93,695 | 13 May 2026 | Direct | ||
| Derek P. D'Antilio | ALGM | Common Stock | Award | 27.6% | 59,877 | 276,653 | 13 May 2026 | Direct | ||
| Troy Coleman | ALGM | Common Stock | Award | 24.6% | 18,116 | 91,646 | 13 May 2026 | Direct | ||
| Michael C. Doogue | ALGM | Common Stock | Award | 90% | 160,835 | 339,584 | 13 May 2026 | Direct | ||
| Erin E. Hagen | ALGM | Common Stock | Award | 30.1% | 9,058 | 39,152 | 13 May 2026 | Direct | ||
| Roald G. Webster | ALGM | Common Stock | Award | 30.6% | 5,300 | 22,600 | 13 May 2026 | Direct | ||
| Sharon Briansky | ALGM | Common Stock | Sale | -10.6% | $425,380 | $47.54 | -8,948 | 75,232 | 11 May 2026 | Direct |
| Michael C. Doogue | ALGM | Common Stock | Sale | -10.6% | $1,421,251 | $47.23 | -30,089 | 252,797 | 11 May 2026 | By the Michael C. Doogue Revocable Trust of 2015 |
| Richard Madormo | ALGM | Common Stock | Disposed to Issuer | -9.73% | -6,498 | 60,311 | 24 Mar 2026 | Direct | ||
| Sharon Briansky | ALGM | Common Stock | Sale | -10.4% | $340,445 | $35.00 | -9,727 | 84,180 | 02 Mar 2026 | Direct |
| Erin Hagen | ALGM | Common Stock | Sale | -7.95% | $90,930 | $35.00 | -2,598 | 30,094 | 02 Mar 2026 | Direct |
| Sharon Briansky | ALGM | Common Stock | Tax liability | -8.84% | -9,107 | 93,907 | 27 Feb 2026 | Direct | ||
| Derek P. D'Antilio | ALGM | Common Stock | Tax liability | -4.41% | -9,995 | 216,776 | 27 Feb 2026 | Direct | ||
| Erin Hagen | ALGM | Common Stock | Tax liability | -5.75% | -1,996 | 32,692 | 27 Feb 2026 | Direct | ||
| Sharon Briansky | ALGM | Common Stock | Sale | -8.25% | $384,762 | $41.56 | -9,258 | 103,014 | 17 Feb 2026 | Direct |
| Sharon Briansky | ALGM | Common Stock | Tax liability | -7.41% | -8,991 | 112,272 | 13 Feb 2026 | Direct | ||
| Derek P. D'Antilio | ALGM | Common Stock | Tax liability | -7.28% | -17,808 | 226,771 | 13 Feb 2026 | Direct | ||
| Ian Kent | ALGM | Common Stock | Award | 72.3% | 9,183 | 21,887 | 02 Feb 2026 | Direct | ||
| Sharon S. Briansky | ALGM | Common Stock | Sale | -18.7% | $836,190 | $30.00 | -27,873 | 121,263 | 10 Dec 2025 | Direct |
| Troy Coleman | ALGM | Common Stock | Award | 73,530 | 73,530 | 11 Nov 2025 | Direct | |||
| Roald G. Webster | ALGM | Common Stock | Sale | -32.3% | $271,193 | $32.81 | -8,266 | 17,300 | 22 Aug 2025 | Direct |
| Richard R. Lury | ALGM | Common Stock | Sale | -27.1% | $222,673 | $31.81 | -7,000 | 18,857 | 12 Aug 2025 | Direct |
| Mary G. Puma | ALGM | Common Stock | Award | 51.4% | 5,932 | 17,483 | 07 Aug 2025 | Direct | ||
| Joseph R. Martin | ALGM | Common Stock | Award | 20.3% | 5,932 | 35,179 | 07 Aug 2025 | Direct | ||
| Yoshihiro Suzuki | ALGM | Common Stock | Award | 2.86% | 5,932 | 213,560 | 07 Aug 2025 | Direct | ||
| Krishna G. Palepu | ALGM | Common Stock | Award | 147.2% | 5,932 | 9,961 | 07 Aug 2025 | Direct | ||
| Jennie M. Raubacher | ALGM | Common Stock | Award | 65.6% | 5,932 | 14,976 | 07 Aug 2025 | Direct | ||
| Susan D. Lynch | ALGM | Common Stock | Award | 25.2% | 5,932 | 29,516 | 07 Aug 2025 | Direct | ||
| Richard R. Lury | ALGM | Common Stock | Award | 29.8% | 5,932 | 25,857 | 07 Aug 2025 | Direct | ||
| Erin E. Hagen | ALGM | Common Stock | Sale | -12.7% | $157,241 | $31.18 | -5,043 | 34,688 | 04 Aug 2025 | Direct |
| Richard R. Lury | ALGM | Common Stock | Sale | -13.5% | $94,395 | $30.45 | -3,100 | 19,925 | 11 Jun 2025 | Direct |
| Richard R. Lury | ALGM | Common Stock | Sale | -22.9% | $189,036 | $27.60 | -6,849 | 23,025 | 04 Jun 2025 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.