Quick Takeaways
- ALGM - ALLEGRO MICROSYSTEMS, INC. has 32 insiders with reported activity on this page.
- Net insider value flow over the last year: -$2,586,864.
- Recent transaction rows are available for direct filing-level review.
- Info
- Insider Trading
- Financials
- Holders
Insider Transactions Reported by 32 Insiders of ALLEGRO MICROSYSTEMS, INC.
- Symbol
- ALGM on Nasdaq
- Location
- Manchester, NH
What Changed
- Buy value: ; sell value: $2,586,864.
- Net share flow: -79,714.
Why This Matters
- 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.
Official SEC Source
Insider trading overview
Last 12 monthsNet insider flow leans to selling over the last 12 months. Net value: -$2,586,864.
Buys
$0
Shares: 0
Insiders: 0
Sells
$2,586,864
Shares: 79,714
Insiders: 4
Net
-$2,586,864
Shares: -79,714
Insiders: -4
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 21,583 | $0 | $816,137 | -$816,137 |
| 3-6 | 0 | 27,873 | $0 | $836,190 | -$836,190 |
| 6-9 | 0 | 20,309 | $0 | $651,106 | -$651,106 |
| 9-12 | 0 | 9,949 | $0 | $283,431 | -$283,431 |
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 | $10,661,985 | Mixed | 15 May 2025 | ||
| Derek P. D'Antilio | EVP, CFO & Treasurer | $7,905,820 | Mixed | 27 Feb 2026 | ||
| Yoshihiro Suzuki | Director | $7,850,465 | Mixed | 07 Aug 2025 | ||
| 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 | ||
| Sharon Briansky | SVP, GC and Secretary | $2,946,300 | -$1,561,397 | -35% | Filing P/S | 27 Feb 2026 |
| Troy Coleman | SVP, General Manager, Products | $2,147,076 | Mixed | 11 Nov 2025 | ||
| Thomas C. Teebagy Jr. | SVP of Operations and Quality | $2,056,341 | Mixed | 18 Nov 2022 | ||
| Richard Madormo | SVP, Worldwide Sales | $1,591,004 | Mixed | 24 Mar 2026 | ||
| Joseph R. Martin | Director | $1,293,180 | Mixed | 07 Aug 2025 | ||
| Susan D. Lynch | Director | $1,085,008 | Mixed | 07 Aug 2025 | ||
| Erin Hagen | Svp, Chro | $1,053,290 | -$248,171 | -19% | Filing P/S | 27 Feb 2026 |
| Ian Kent | SVP, Global Operations | $936,982 | Mixed | 02 Feb 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 | $567,581 | -$271,193 | -32% | Filing P/S | 22 Aug 2025 |
| 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 | ||
| 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 by the holder's primary source 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 |
|---|---|---|---|---|---|---|---|---|
| Sanken Electric Co., Ltd. |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
59,732,782
|
$1,383,411,231 | — | 07 Aug 2024 | |
| FMR LLC |
13F
13D/G
|
Company |
13%
from 13D/G
|
23,635,746
|
$623,510,987 | — | 31 Dec 2025 | |
| OEP SKNA, L.P. |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
17,649,247
|
$494,884,886 | — | 02 Feb 2023 | |
| Capital Research Global Investors |
13D/G
13F
|
Company |
7.1%
|
13,111,292
|
$410,252,327 | -$87,395,004 | 31 Dec 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
7.7%
|
14,202,528
|
$374,662,689 | — | 31 Dec 2025 | |
| BlackRock, Inc. |
13F
|
Company |
6.6%
|
12,201,457
|
$321,874,446 | — | 31 Dec 2025 | |
| Invesco Ltd. |
13F
|
Company |
4.1%
|
7,651,051
|
$201,834,725 | — | 31 Dec 2025 | |
| JPMORGAN CHASE & CO |
13F
13D/G
|
Company |
4.8%
from 13D/G
|
7,347,422
|
$193,825,019 | — | 31 Dec 2025 | |
| STATE STREET CORP |
13F
|
Company |
2.9%
|
5,359,488
|
$141,383,293 | — | 31 Dec 2025 | |
| Ravi Vig |
3/4/5
|
President and CEO, Director |
—
class O/S missing
|
3,271,883
|
$91,743,601 | — | 13 Jun 2022 | |
| Clearbridge Investments, LLC |
13F
|
Company |
1.6%
|
2,916,785
|
$76,944,799 | — | 31 Dec 2025 | |
| ADAGE CAPITAL PARTNERS GP, L.L.C. |
13F
|
Company |
1.5%
|
2,803,944
|
$73,968,043 | — | 31 Dec 2025 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
1.4%
|
2,560,520
|
$67,546,518 | — | 31 Dec 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
1.3%
|
2,393,968
|
$63,165,468 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
1.2%
|
2,233,136
|
$58,910,171 | — | 31 Dec 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
1.2%
|
2,140,147
|
$56,461,794 | — | 31 Dec 2025 | |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. |
13F
|
Company |
1.1%
|
2,036,212
|
$53,715,000 | — | 31 Dec 2025 | |
| Analog Century Management LP |
13F
|
Company |
1%
|
1,890,072
|
$49,860,099 | — | 31 Dec 2025 | |
| PRINCIPAL FINANCIAL GROUP INC |
13F
|
Company |
0.94%
|
1,742,296
|
$45,961,768 | — | 31 Dec 2025 | |
| NORGES BANK |
13F
|
Company |
0.79%
|
1,457,805
|
$38,456,896 | — | 31 Dec 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.74%
|
1,362,418
|
$35,940,587 | — | 31 Dec 2025 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
0.73%
|
1,341,739
|
$35,395,075 | — | 31 Dec 2025 | |
| SEGALL BRYANT & HAMILL, LLC |
13F
|
Company |
0.68%
|
1,248,310
|
$32,930,418 | — | 31 Dec 2025 | |
| ALLIANCEBERNSTEIN L.P. |
13F
|
Company |
0.62%
|
1,148,652
|
$30,301,440 | — | 31 Dec 2025 | |
| Point72 Asset Management, L.P. |
13F
|
Company |
0.61%
|
1,119,265
|
$29,526,211 | — | 31 Dec 2025 | |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
|
Company |
0.6%
|
1,106,337
|
$29,185,170 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.55%
|
1,014,999
|
$26,775,673 | — | 31 Dec 2025 | |
| VOYA INVESTMENT MANAGEMENT LLC |
13F
|
Company |
0.51%
|
940,358
|
$24,806,644 | — | 31 Dec 2025 | |
| RAYMOND JAMES FINANCIAL INC |
13F
|
Company |
0.49%
|
908,441
|
$23,964,672 | — | 31 Dec 2025 | |
| LOOMIS SAYLES & CO L P |
13F
|
Company |
0.45%
|
829,239
|
$21,875,325 | — | 31 Dec 2025 | |
| Paul V Walsh Jr. |
3/4/5
|
SVP, CFO & Treasurer |
—
class O/S missing
|
779,994
|
$21,871,032 | — | 21 Dec 2021 | |
| BALYASNY ASSET MANAGEMENT L.P. |
13F
|
Company |
0.44%
|
810,460
|
$21,379,935 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.43%
|
796,329
|
$21,007,159 | — | 31 Dec 2025 | |
| Schonfeld Strategic Advisors LLC |
13F
|
Company |
0.41%
|
754,824
|
$19,912,255 | — | 31 Dec 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.41%
|
750,586
|
$19,800,456 | — | 31 Dec 2025 | |
| MARSHALL WACE, LLP |
13F
|
Company |
0.39%
|
714,579
|
$18,850,595 | — | 31 Dec 2025 | |
| SILVERCREST ASSET MANAGEMENT GROUP LLC |
13F
|
Company |
0.37%
|
675,703
|
$17,825,066 | — | 31 Dec 2025 | |
| GW&K Investment Management, LLC |
13F
|
Company |
0.36%
|
669,146
|
$17,652,000 | — | 31 Dec 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.31%
|
576,655
|
$15,212,159 | — | 31 Dec 2025 | |
| Talos Eurisko Asset Management LP |
13F
|
Company |
0.3%
|
560,200
|
$14,778,076 | — | 31 Dec 2025 | |
| FRONTIER CAPITAL MANAGEMENT CO LLC |
13F
|
Company |
0.28%
|
524,931
|
$13,847,680 | — | 31 Dec 2025 | |
| S Squared Technology, LLC |
13F
|
Company |
0.25%
|
457,451
|
$12,067,557 | — | 31 Dec 2025 | |
| FIRST TRUST ADVISORS LP |
13F
|
Company |
0.24%
|
448,980
|
$11,844,092 | — | 31 Dec 2025 | |
| RENAISSANCE TECHNOLOGIES LLC |
13F
|
Company |
0.24%
|
436,200
|
$11,506,956 | — | 31 Dec 2025 | |
| Engineers Gate Manager LP |
13F
|
Company |
0.23%
|
419,600
|
$11,069,048 | — | 31 Dec 2025 | |
| Michael C. Doogue |
3/4/5
|
President and CEO, Director |
0.25%
|
461,635
|
$10,661,985 | — | 15 May 2025 | |
| Alyeska Investment Group, L.P. |
13F
|
Company |
0.22%
|
400,000
|
$10,552,000 | — | 31 Dec 2025 | |
| Man Group plc |
13F
|
Company |
0.21%
|
387,105
|
$10,211,830 | — | 31 Dec 2025 | |
| AMERIPRISE FINANCIAL INC |
13F
|
Company |
0.2%
|
373,490
|
$9,852,666 | — | 31 Dec 2025 | |
| Allspring Global Investments Holdings, LLC |
13F
|
Company |
0.19%
|
356,026
|
$9,580,660 | — | 31 Dec 2025 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| Michael C. Doogue | ALGM | Common Stock | Tax liability | -9.16% | -21,730 | 215,549 | 16 May 2025 | Direct | ||
| Roald G. Webster | ALGM | Common Stock | Tax liability | -16.2% | -4,948 | 25,566 | 16 May 2025 | Direct | ||
| Erin E. Hagen | ALGM | Common Stock | Tax liability | -11% | -4,899 | 39,731 | 16 May 2025 | Direct | ||
| Sharon Briansky | ALGM | Common Stock | Tax liability | -11.2% | -18,712 | 149,136 | 16 May 2025 | Direct | ||
| Derek P. D'Antilio | ALGM | Common Stock | Tax liability | -10.9% | -29,911 | 244,579 | 16 May 2025 | Direct | ||
| Michael C. Doogue | ALGM | Common Stock | Award | 172.6% | 150,226 | 237,279 | 15 May 2025 | Direct | ||
| Roald G. Webster | ALGM | Common Stock | Award | 47.1% | 9,765 | 30,514 | 15 May 2025 | Direct | ||
| Richard Madormo | ALGM | Common Stock | Award | 128.4% | 37,557 | 66,809 | 15 May 2025 | Direct | ||
| Erin E. Hagen | ALGM | Common Stock | Award | 68.6% | 18,153 | 44,630 | 15 May 2025 | Direct | ||
| Sharon Briansky | ALGM | Common Stock | Award | 26.4% | 35,053 | 167,848 | 15 May 2025 | Direct | ||
| Derek P. D'Antilio | ALGM | Common Stock | Award | 31.1% | 65,098 | 274,490 | 15 May 2025 | Direct | ||
| Michael C. Doogue | ALGM | Common Stock | Award | 27% | 18,489 | 87,053 | 13 May 2025 | Direct | ||
| Derek P. D'Antilio | ALGM | Common Stock | Award | 11.3% | 21,295 | 209,392 | 13 May 2025 | Direct | ||
| Roald G. Webster | ALGM | Common Stock | Award | 5.07% | 1,002 | 20,749 | 13 May 2025 | Direct | ||
| Erin E. Hagen | ALGM | Common Stock | Award | 4.84% | 1,222 | 26,477 | 13 May 2025 | Direct | ||
| Sharon S. Briansky | ALGM | Common Stock | Award | 12.4% | 14,656 | 132,795 | 13 May 2025 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.