Mailing Address 955 PERIMETER ROAD MANCHESTER NH 03103
Business Address 955 PERIMETER ROAD MANCHESTER NH 03103 (603) 626-2300
ALLEGRO MICROSYSTEMS, INC. CIK#: 0000866291 (see all company filings)

SIC: 3674 - SEMICONDUCTORS & RELATED DEVICES
State location: NH | Fiscal Year End: 0331
formerly: ALLEGRO MICROSYSTEMS INC (filings through 2020-10-21)
(CF Office: 04 Manufacturing)
Get insider transactions for this issuer.

Filter Results
Search Within Files

(YYYYMMDD)
Ownership?


Enter keywords
Items 1 - 40  0000866291 Filings RSS Feed
Filings Format Description Filing Date File/Film Number
8-K  Documents   Interactive Data Current report, items 5.02 and 9.01
Acc-no: 0000950170-25-037637 (34 Act)  Size: 157 KB
2025-03-12 001-39675
25730168
425  Documents Prospectuses and communications, business combinations
Acc-no: 0001193125-25-047736 (34 Act)  Size: 50 KB
2025-03-06 001-39675
25713521
8-K  Documents   Interactive Data Current report, items 5.02 and 9.01
Acc-no: 0000950103-25-002318 (34 Act)  Size: 407 KB
2025-02-24 001-39675
25654185
SCHEDULE 13G/A  Documents [Amend] Statement of Beneficial Ownership by Certain Investors
Acc-no: 0000315066-25-000750 (34 Act)  Size: 11 KB
2025-02-12 005-92108
25612347
8-K  Documents   Interactive Data Current report, items 1.01, 2.03, and 9.01
Acc-no: 0000950170-25-015395 (34 Act)  Size: 3 MB
2025-02-06 001-39675
25597539
8-K  Documents   Interactive Data Current report, items 5.02, 7.01, and 9.01
Acc-no: 0000950170-25-012020 (34 Act)  Size: 253 KB
2025-02-03 001-39675
25580594
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0000950170-25-011434 (34 Act)  Size: 9 MB
2025-01-31 001-39675
25575987
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0000950170-25-010785 (34 Act)  Size: 1 MB
2025-01-30 001-39675
25571168
8-K  Documents   Interactive Data Current report, items 7.01 and 9.01
Acc-no: 0000950170-25-003826 (34 Act)  Size: 164 KB
2025-01-10 001-39675
25520547
8-K  Documents   Interactive Data Current report, items 7.01 and 9.01
Acc-no: 0000950170-25-001662 (34 Act)  Size: 165 KB
2025-01-06 001-39675
25509027
8-K  Documents   Interactive Data Current report, items 5.02 and 9.01
Acc-no: 0000950170-24-139583 (34 Act)  Size: 155 KB
2024-12-23 001-39675
241573757
SC 13G/A  Documents [Amend] Statement of Beneficial Ownership by Certain Investors
Acc-no: 0000932471-24-000833 (34 Act)  Size: 6 KB
2024-11-12 005-92108
241446440
SC 13G/A  Documents [Amend] Statement of Beneficial Ownership by Certain Investors
Acc-no: 0000315066-24-002630 (34 Act)  Size: 8 KB
2024-11-12 005-92108
241444422
SC 13G  Documents Statement of Beneficial Ownership by Certain Investors
Acc-no: 0002012383-24-004106 (34 Act)  Size: 14 KB
2024-11-08 005-92108
241442138
SC 13G  Documents Statement of Beneficial Ownership by Certain Investors
Acc-no: 0000932471-24-000240 (34 Act)  Size: 5 KB
2024-11-04 005-92108
241421351
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0000950170-24-119808 (34 Act)  Size: 8 MB
2024-11-01 001-39675
241417079
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0000950170-24-119242 (34 Act)  Size: 1 MB
2024-10-31 001-39675
241412402
SC 13G  Documents Statement of Beneficial Ownership by Certain Investors
Acc-no: 0002012383-24-002212 (34 Act)  Size: 13 KB
2024-10-24 005-92108
241392067
SC 13G  Documents Statement of Beneficial Ownership by Certain Investors
Acc-no: 0000019617-24-000531 (34 Act)  Size: 90 KB
2024-10-09 005-92108
SC 13G/A  Documents [Amend] Statement of Beneficial Ownership by Certain Investors
Acc-no: 0000950103-24-014604 (34 Act)  Size: 57 KB
2024-10-03 005-92108
241353142
8-K  Documents   Interactive Data Current report, items 1.01, 5.02, and 9.01
Acc-no: 0000950170-24-109070 (34 Act)  Size: 700 KB
2024-09-24 001-39675
241320259
8-K  Documents   Interactive Data Current report, items 5.07 and 9.01
Acc-no: 0000950170-24-095424 (34 Act)  Size: 237 KB
2024-08-12 001-39675
241196854
SC 13G/A  Documents [Amend] Statement of Beneficial Ownership by Certain Investors
Acc-no: 0001193125-24-197302 (34 Act)  Size: 35 KB
2024-08-09 005-92108
241190275
8-K  Documents   Interactive Data Current report, items 1.01, 2.03, 8.01, and 9.01
Acc-no: 0000950103-24-011823 (34 Act)  Size: 2 MB
2024-08-07 001-39675
241181763
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0000950170-24-089610 (34 Act)  Size: 7 MB
2024-08-02 001-39675
241168960
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0000950170-24-088944 (34 Act)  Size: 976 KB
2024-08-01 001-39675
241164195
8-K  Documents   Interactive Data Current report, items 8.01 and 9.01
Acc-no: 0000950103-24-010880 (34 Act)  Size: 510 KB
2024-07-26 001-39675
241146828
424B5  Documents Prospectus [Rule 424(b)(5)]
Acc-no: 0000950103-24-010788 (33 Act)  Size: 541 KB
2024-07-25 333-280960
241142993
424B5  Documents Prospectus [Rule 424(b)(5)]
Acc-no: 0000950103-24-010524 (33 Act)  Size: 509 KB
2024-07-23 333-280960
241134744
8-K  Documents   Interactive Data Current report, items 1.01, 2.02, 5.02, 7.01, and 9.01
Acc-no: 0000950103-24-010519 (34 Act)  Size: 513 KB
2024-07-23 001-39675
241134538
S-3ASR  Documents Automatic shelf registration statement of securities of well-known seasoned issuers
Acc-no: 0000950103-24-010515 (33 Act)  Size: 301 KB
2024-07-23 333-280960
241134482
SC 13G/A  Documents [Amend] Statement of Beneficial Ownership by Certain Investors
Acc-no: 0000315066-24-001820 (34 Act)  Size: 8 KB
2024-07-10 005-92108
241108954
ARS  Documents Annual Report to Security Holders
Acc-no: 0000950170-24-077614 (34 Act)  Size: 4 MB
2024-06-26 001-39675
241070609
DEFA14A  Documents Additional definitive proxy soliciting materials and Rule 14(a)(12) material
Acc-no: 0000950170-24-077613 (34 Act)  Size: 1 MB
2024-06-26 001-39675
241070607
DEF 14A  Documents   Interactive Data Other definitive proxy statements
Acc-no: 0000950170-24-077611 (34 Act)  Size: 11 MB
2024-06-26 001-39675
241070604
10-K  Documents   Interactive Data Annual report [Section 13 and 15(d), not S-K Item 405]
Acc-no: 0000950170-24-063770 (34 Act)  Size: 19 MB
2024-05-23 001-39675
24975386
SD  Documents Specialized disclosure report
Acc-no: 0000950170-24-058637 (34 Act)  Size: 390 KB
2024-05-13 001-39675
24938995
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0000950170-24-056257 (34 Act)  Size: 1 MB
2024-05-09 001-39675
24928512
8-K  Documents   Interactive Data Current report, items 1.01 and 9.01
Acc-no: 0000950170-24-048323 (34 Act)  Size: 1 MB
2024-04-25 001-39675
24876462
8-K  Documents   Interactive Data Current report, items 5.02, 7.01, and 9.01
Acc-no: 0000950170-24-041158 (34 Act)  Size: 254 KB
2024-04-03 001-39675
24819487