Allegro Microsystems Inc

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Allegro Microsystems Inc
TickerALGM
CIK #0000866291
CUSIP01749D105
SectorManufacturing - Semiconductors & Related Devices
Address955 Perimeter Road, Manchester, NH 03103
Source [EDGAR]
CIK Filing 2011 - 2026
[0000866291] 10-K
[0000866291] 10-Q
[0000866291] 3
[0000866291] 4
[0000866291] 5
[0000866291] 8-K
[0000866291] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
JPMorgan Chase & Co Allegro Microsystems Inc [2026-07-16] 0.0
Capital Research Global Investors Allegro Microsystems Inc [2025-05-13] 0.0
BlackRock Inc Allegro Microsystems Inc [2024-11-08] 5.8
Vanguard Group Inc Allegro Microsystems Inc [2024-11-04] 7.59
BlackRock Inc Allegro Microsystems Inc [2024-10-24] 5.8
JPMorgan Chase & Co Allegro Microsystems Inc [2024-10-09] 5.6
FMR LLC Allegro Microsystems Inc [2024-02-09] 0.0
OEP SKNA LP Allegro Microsystems Inc [2021-02-08] 23.5
Sanken Electric Co Ltd Allegro Microsystems Inc [2021-02-08] 54.7
Form 3/4/5 Filer 2011 - 2026
White Brian C
Allegro Microsystems Inc
Madormo Richard
Coleman Troy
Webster Roald Graham
D'Antilio Derek
Hagen Erin
Kent Ian
Briansky Sharon
Doogue Michael
Willett Robert
Lynch Susan D
Lury Richard R
Raubacher Jennie
Palepu Krishna G
Martin Joseph R
PUMA Mary G
Suzuki Yoshihiro
Glover Max R
Nargolwala Vineet A
Narayan Suman
Aldrich David J
Sanken Electric Co Ltd
Schorr Paul IV
Valente Joanne
Kazerounian Reza
OEP VI GP Ltd
OEP SKNA GP LLC
OEP SKNA LP
OEP VI General Partner LP
Teebagy Thomas C Jr
Hatano Kojiro
Kawashima Katsumi
Vig Ravi
Walsh Paul V Jr
Brown Christopher
Fujita Noriharu
King Christine
Takani Hideo
Dunn Andrew Glover
Insider Transaction (Form 3/4/5) Date Action Shares Price Value ($)
Madormo Richard
Common Stock
2026-03-24 Disposed to issuer 6,498 $32.58 211,705
Hagen Erin
Common Stock
2026-03-02 Sell 2,598 $35.00 90,930
Briansky Sharon
Common Stock
2026-03-02 Sell 9,727 $35.00 340,445
D'Antilio Derek
Common Stock
2026-02-27 Tax withheld 9,995 $36.47 364,518
Briansky Sharon
Common Stock
2026-02-27 Tax withheld 9,107 $36.47 332,132
Hagen Erin
Common Stock
2026-02-27 Tax withheld 1,996 $36.47 72,794
Briansky Sharon
Common Stock
2026-02-17 Sell 9,258 $41.56 384,762
D'Antilio Derek
Common Stock
2026-02-13 Tax withheld 17,808 $42.38 754,703
Briansky Sharon
Common Stock
2026-02-13 Tax withheld 8,991 $42.38 381,039
Kent Ian
Common Stock
2026-02-02 Grant 9,183 $0.00
Briansky Sharon
Common Stock
2025-12-10 Sell 27,873 $30.00 836,190
Coleman Troy
Common Stock
2025-11-11 Grant 73,530 $0.00
Common Stock
2025-08-22 Sell 8,266 $32.81 271,207
Lury Richard R
Common Stock
2025-08-12 Sell 7,000 $31.81 222,670
Lynch Susan D
Common Stock
2025-08-07 Grant 5,932 $0.00
Martin Joseph R
Common Stock
2025-08-07 Grant 5,932 $0.00
PUMA Mary G
Common Stock
2025-08-07 Grant 5,932 $0.00
Raubacher Jennie
Common Stock
2025-08-07 Grant 5,932 $0.00
Palepu Krishna G
Common Stock
2025-08-07 Grant 5,932 $0.00
Lury Richard R
Common Stock
2025-08-07 Grant 5,932 $0.00
showing 20 of 200 most recent transactions
13F Ownership Over TimeHoldersShares Held
2026-03-31 320 137,075,356
2025-12-31 295 136,788,579
2025-09-30 300 145,445,776
2025-06-30 283 152,280,743
2025-03-31 296 160,024,062
2024-12-31 263 140,451,112
2024-09-30 259 154,060,065
2024-06-30 278 113,945,361
2024-03-31 285 117,679,789
2023-12-31 296 103,159,563
2023-09-30 315 101,157,534
2023-06-30 357 97,776,441
Form 13F Holdings
Firm Period DFND Voting Shares
Peregrine Capital Management LLC [2026-06-30] SOLE 74,657 200,422
Gateway Investment Advisers LLC [2026-06-30] SOLE 37,110 37,110
Louisiana State Employees Retirement System [2026-06-30] SOLE 36,000 36,000
Yousif Capital Management LLC [2026-06-30] SOLE 10,101 34,160
Commonwealth of Pennsylvania Public School Empls Retrmt SYS [2026-06-30] SOLE 29,721 29,721
Alaska Retirement Management Board [2026-06-30] SOLE 12,164 12,164
Wealth Enhancement Advisory Services LLC [2026-06-30] SOLE 523 10,944
Crossmark Global Holdings Inc [2026-06-30] SOLE 5,238 5,238
Archford Capital Strategies LLC [2026-06-30] SOLE 5,001 5,001
Fulton Bank NA [2026-06-30] SOLE 4,623 4,623
Gamma Investing LLC [2026-06-30] DFND 3,545 3,545
GC Wealth Management RIA LLC [2026-06-30] SOLE 3,085 3,085
Fifth Third Wealth Advisors LLC [2026-06-30] SOLE 3,073 3,073
Farther Finance Advisors LLC [2026-06-30] SOLE 0 2,778
Merit Financial Group LLC [2026-06-30] OTR 0 2,549
1620 Investment Advisors Inc [2026-06-30] SOLE 1,839 1,839
Harbor Investment Advisory LLC [2026-06-30] SOLE 1,032 1,032
Corecap Advisors LLC [2026-06-30] SOLE 0 1,000
Curated Wealth Partners LLC [2026-06-30] OTR 0 909
Global X Japan Co Ltd [2026-06-30] SOLE 674 674
Activest Wealth Management [2026-06-30] SOLE 0 385
Merit Financial Group LLC [2026-06-30] SOLE 0 358
Spire Wealth Management [2026-06-30] SOLE 0 233
Owl Creek Wealth Partners LLC [2026-06-30] SOLE 0 205
MassMutual Private Wealth & Trust FSB [2026-06-30] SOLE 196 196
LRI Investments LLC [2026-06-30] SOLE 109 109
Farmers & Merchants Investments Inc [2026-06-30] SOLE 105 105
Investors Research Corp [2026-06-30] SOLE 0 93
Versant Capital Management Inc [2026-06-30] SOLE 89 89
Handelsbanken Fonder AB [2026-06-30] SOLE 0 59
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