Civic Intelligence

Allegro Microsystems Inc

Plan context: Allegro Microsystems LLC Employees' Retirement Savings Plan

EIN 22-3056180 • Worcester, MA • 106 filings • 29 plans

115 Northeast CutoffWorcester, MA 01606
Current Snapshot

Latest Year

2025

2025 Participants

533

2025 Assets

$259,610,470

2025 Contributions

$15,013,742

Historical Graphs

Total Assets Over Time

Aggregate end-of-year assets by filing year, excluding zero-asset years

$259,610,470$129,805,235$0200020132025YearValue
$259,610,470Latest year 2025

Participants Over Time

Largest reported end-of-year plan headcount by filing year, used to avoid double-counting participants across overlapping plans

1,3246620199920122025YearValue
533Latest year 2025

Company Timeline

Year summaries and individual filings are combined here so you can stay in one place while moving across years and plan filings.

Year / FilingFilingsParticipantsAssetsContributionsContrib./Participant
20252533$259,610,470$15,013,742$28,168iApproximate average salary by contribution assumption: employee only about $704,209 at 4% or $469,473 at 6%; with 50% employer match about $469,473 at 4% or $312,982 at 6%; with 100% employer match about $352,105 at 4% or $234,736 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-532$259,610,470$15,013,742$28,221iApproximate average salary by contribution assumption: employee only about $705,533 at 4% or $470,355 at 6%; with 50% employer match about $470,355 at 4% or $313,570 at 6%; with 100% employer match about $352,766 at 4% or $235,178 at 6%.
Allegro Microsystems Inc. Employees Health and Welfare Plan-533---
20242687$251,822,857$18,164,215$26,440iApproximate average salary by contribution assumption: employee only about $660,998 at 4% or $440,665 at 6%; with 50% employer match about $440,665 at 4% or $293,777 at 6%; with 100% employer match about $330,499 at 4% or $220,333 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-629$251,822,857$18,164,215$28,878iApproximate average salary by contribution assumption: employee only about $721,948 at 4% or $481,299 at 6%; with 50% employer match about $481,299 at 4% or $320,866 at 6%; with 100% employer match about $360,974 at 4% or $240,649 at 6%.
Allegro Microsystems Inc. Employees Health and Welfare Plan-687---
20232716$234,636,927$19,384,051$27,073iApproximate average salary by contribution assumption: employee only about $676,817 at 4% or $451,212 at 6%; with 50% employer match about $451,212 at 4% or $300,808 at 6%; with 100% employer match about $338,409 at 4% or $225,606 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-716$234,636,927$19,384,051$27,073iApproximate average salary by contribution assumption: employee only about $676,817 at 4% or $451,212 at 6%; with 50% employer match about $451,212 at 4% or $300,808 at 6%; with 100% employer match about $338,409 at 4% or $225,606 at 6%.
Allegro Microsystems Inc. Employees Health and Welfare Plan-648---
20222651$196,347,436$17,680,678$27,159iApproximate average salary by contribution assumption: employee only about $678,981 at 4% or $452,654 at 6%; with 50% employer match about $452,654 at 4% or $301,770 at 6%; with 100% employer match about $339,491 at 4% or $226,327 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-651$196,347,436$17,680,678$27,159iApproximate average salary by contribution assumption: employee only about $678,981 at 4% or $452,654 at 6%; with 50% employer match about $452,654 at 4% or $301,770 at 6%; with 100% employer match about $339,491 at 4% or $226,327 at 6%.
Allegro Microsystems Inc. Employees Health and Welfare Plan-608---
20212611$241,408,292$13,954,968$22,840iApproximate average salary by contribution assumption: employee only about $570,989 at 4% or $380,659 at 6%; with 50% employer match about $380,659 at 4% or $253,773 at 6%; with 100% employer match about $285,494 at 4% or $190,330 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-611$241,408,292$13,954,968$22,840iApproximate average salary by contribution assumption: employee only about $570,989 at 4% or $380,659 at 6%; with 50% employer match about $380,659 at 4% or $253,773 at 6%; with 100% employer match about $285,494 at 4% or $190,330 at 6%.
Allegro Microsystems Inc. Employees Health and Welfare Plan-594---
20202596$210,406,417$11,607,283$19,475iApproximate average salary by contribution assumption: employee only about $486,883 at 4% or $324,588 at 6%; with 50% employer match about $324,588 at 4% or $216,392 at 6%; with 100% employer match about $243,441 at 4% or $162,294 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-596$210,406,417$11,607,283$19,475iApproximate average salary by contribution assumption: employee only about $486,883 at 4% or $324,588 at 6%; with 50% employer match about $324,588 at 4% or $216,392 at 6%; with 100% employer match about $243,441 at 4% or $162,294 at 6%.
Allegro Microsystems Inc. Employees Health and Welfare Plan-595---
20192589$186,283,274$12,345,018$20,959iApproximate average salary by contribution assumption: employee only about $523,982 at 4% or $349,321 at 6%; with 50% employer match about $349,321 at 4% or $232,881 at 6%; with 100% employer match about $261,991 at 4% or $174,661 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-569$186,283,274$12,345,018$21,696iApproximate average salary by contribution assumption: employee only about $542,400 at 4% or $361,600 at 6%; with 50% employer match about $361,600 at 4% or $241,067 at 6%; with 100% employer match about $271,200 at 4% or $180,800 at 6%.
Allegro Microsystems Inc. Employees Health and Welfare Plan-589---
20182620$157,103,696$11,694,692$18,862iApproximate average salary by contribution assumption: employee only about $471,560 at 4% or $314,373 at 6%; with 50% employer match about $314,373 at 4% or $209,582 at 6%; with 100% employer match about $235,780 at 4% or $157,187 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-606$157,103,696$11,694,692$19,298iApproximate average salary by contribution assumption: employee only about $482,454 at 4% or $321,636 at 6%; with 50% employer match about $321,636 at 4% or $214,424 at 6%; with 100% employer match about $241,227 at 4% or $160,818 at 6%.
Allegro Microsystems Inc. Employees Health and Welfare Plan-620---
20172651$170,039,030$11,016,198$16,922iApproximate average salary by contribution assumption: employee only about $423,049 at 4% or $282,033 at 6%; with 50% employer match about $282,033 at 4% or $188,022 at 6%; with 100% employer match about $211,525 at 4% or $141,016 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-649$170,039,030$11,016,198$16,974iApproximate average salary by contribution assumption: employee only about $424,353 at 4% or $282,902 at 6%; with 50% employer match about $282,902 at 4% or $188,601 at 6%; with 100% employer match about $212,176 at 4% or $141,451 at 6%.
Allegro Microsystems Inc. Employees Health and Welfare Plan-651---
20162676$148,472,727$11,343,946$16,781iApproximate average salary by contribution assumption: employee only about $419,525 at 4% or $279,683 at 6%; with 50% employer match about $279,683 at 4% or $186,455 at 6%; with 100% employer match about $209,762 at 4% or $139,842 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-676$148,472,727$11,343,946$16,781iApproximate average salary by contribution assumption: employee only about $419,525 at 4% or $279,683 at 6%; with 50% employer match about $279,683 at 4% or $186,455 at 6%; with 100% employer match about $209,762 at 4% or $139,842 at 6%.
Allegro Microsystems Inc. Employees Health and Welfare Plan-663---
20152659$136,142,077$10,273,732$15,590iApproximate average salary by contribution assumption: employee only about $389,747 at 4% or $259,831 at 6%; with 50% employer match about $259,831 at 4% or $173,221 at 6%; with 100% employer match about $194,874 at 4% or $129,916 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-659$136,142,077$10,273,732$15,590iApproximate average salary by contribution assumption: employee only about $389,747 at 4% or $259,831 at 6%; with 50% employer match about $259,831 at 4% or $173,221 at 6%; with 100% employer match about $194,874 at 4% or $129,916 at 6%.
Allegro Microsystems Inc. Employees Health and Welfare Plan-649---
20143641$134,651,908$9,171,022$14,307iApproximate average salary by contribution assumption: employee only about $357,684 at 4% or $238,456 at 6%; with 50% employer match about $238,456 at 4% or $158,971 at 6%; with 100% employer match about $178,842 at 4% or $119,228 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-641$134,651,908$9,138,682$14,257iApproximate average salary by contribution assumption: employee only about $356,423 at 4% or $237,615 at 6%; with 50% employer match about $237,615 at 4% or $158,410 at 6%; with 100% employer match about $178,211 at 4% or $118,808 at 6%.
Allegro Microsystems Inc. Employees Health and Welfare Plan-632---
ALLEGRO MICROSYSTEMS INC RETIREMENT SUCCESSOR PLAN-0-$32,340-
20135615$127,779,645$8,225,574$13,375iApproximate average salary by contribution assumption: employee only about $334,373 at 4% or $222,915 at 6%; with 50% employer match about $222,915 at 4% or $148,610 at 6%; with 100% employer match about $167,186 at 4% or $111,458 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-615$127,611,437$8,225,574$13,375iApproximate average salary by contribution assumption: employee only about $334,373 at 4% or $222,915 at 6%; with 50% employer match about $222,915 at 4% or $148,610 at 6%; with 100% employer match about $167,186 at 4% or $111,458 at 6%.
ALLEGRO MICROSYSTEMS INC RETIREMENT SUCCESSOR PLAN-33$168,208--
Allegro Microsystems Inc. Employees Health and Welfare Plan-605---
Allegro Microsystems Inc Supplemental Healthcare Expense Plan-0---
Allegro Microsystems Inc Salaried Employees Severance Plan-0---
20125668$108,068,850$8,651,228$12,951iApproximate average salary by contribution assumption: employee only about $323,774 at 4% or $215,849 at 6%; with 50% employer match about $215,849 at 4% or $143,899 at 6%; with 100% employer match about $161,887 at 4% or $107,925 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-633$107,900,660$8,651,228$13,667iApproximate average salary by contribution assumption: employee only about $341,676 at 4% or $227,784 at 6%; with 50% employer match about $227,784 at 4% or $151,856 at 6%; with 100% employer match about $170,838 at 4% or $113,892 at 6%.
ALLEGRO MICROSYSTEMS INC RETIREMENT SUCCESSOR PLAN-35$168,190--
Allegro Microsystems Inc Supplemental Healthcare Expense Plan-202---
Allegro Microsystems Inc Salaried Employees Severance Plan-457---
Allegro Microsystems Inc. Employees Health and Welfare Plan-668---
20115789$100,963,046$8,266,542$10,477iApproximate average salary by contribution assumption: employee only about $261,931 at 4% or $174,621 at 6%; with 50% employer match about $174,621 at 4% or $116,414 at 6%; with 100% employer match about $130,965 at 4% or $87,310 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-787$100,749,699$8,260,542$10,496iApproximate average salary by contribution assumption: employee only about $262,406 at 4% or $174,937 at 6%; with 50% employer match about $174,937 at 4% or $116,625 at 6%; with 100% employer match about $131,203 at 4% or $87,469 at 6%.
ALLEGRO MICROSYSTEMS INC RETIREMENT SUCCESSOR PLAN-40$213,347$6,000$150iApproximate average salary by contribution assumption: employee only about $3,750 at 4% or $2,500 at 6%; with 50% employer match about $2,500 at 4% or $1,667 at 6%; with 100% employer match about $1,875 at 4% or $1,250 at 6%.
Allegro Microsystems Inc. Employees Health and Welfare Plan-789---
Allegro Microsystems Inc Salaried Employees Severance Plan-475---
Allegro Microsystems Inc Supplemental Healthcare Expense Plan-199---
20105774$99,966,119$7,587,121$9,802iApproximate average salary by contribution assumption: employee only about $245,062 at 4% or $163,375 at 6%; with 50% employer match about $163,375 at 4% or $108,916 at 6%; with 100% employer match about $122,531 at 4% or $81,687 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-772$99,756,661$7,401,121$9,587iApproximate average salary by contribution assumption: employee only about $239,674 at 4% or $159,782 at 6%; with 50% employer match about $159,782 at 4% or $106,522 at 6%; with 100% employer match about $119,837 at 4% or $79,891 at 6%.
ALLEGRO MICROSYSTEMS INC RETIREMENT SUCCESSOR PLAN-42$209,458$186,000$4,429iApproximate average salary by contribution assumption: employee only about $110,714 at 4% or $73,810 at 6%; with 50% employer match about $73,810 at 4% or $49,206 at 6%; with 100% employer match about $55,357 at 4% or $36,905 at 6%.
Allegro Microsystems Inc. Employees Health and Welfare Plan-774---
Allegro Microsystems Inc Salaried Employees Severance Plan-432---
Allegro Microsystems Inc Supplemental Healthcare Expense Plan-213---
20095718$85,683,421$5,018,025$6,989iApproximate average salary by contribution assumption: employee only about $174,722 at 4% or $116,482 at 6%; with 50% employer match about $116,482 at 4% or $77,654 at 6%; with 100% employer match about $87,361 at 4% or $58,241 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-718$85,653,392$4,861,525$6,771iApproximate average salary by contribution assumption: employee only about $169,273 at 4% or $112,849 at 6%; with 50% employer match about $112,849 at 4% or $75,233 at 6%; with 100% employer match about $84,637 at 4% or $56,424 at 6%.
ALLEGRO MICROSYSTEMS INC RETIREMENT SUCCESSOR PLAN-42$30,029$156,500$3,726iApproximate average salary by contribution assumption: employee only about $93,155 at 4% or $62,103 at 6%; with 50% employer match about $62,103 at 4% or $41,402 at 6%; with 100% employer match about $46,577 at 4% or $31,052 at 6%.
Allegro Microsystems Inc Supplemental Healthcare Expense Plan-182---
Allegro Microsystems Inc Salaried Employees Severance Plan-402---
Allegro Microsystems Inc. Employees Health and Welfare Plan-706---
20085832$71,908,691$6,902,326$8,296iApproximate average salary by contribution assumption: employee only about $207,402 at 4% or $138,268 at 6%; with 50% employer match about $138,268 at 4% or $92,178 at 6%; with 100% employer match about $103,701 at 4% or $69,134 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-832$71,639,493$6,902,326$8,296iApproximate average salary by contribution assumption: employee only about $207,402 at 4% or $138,268 at 6%; with 50% employer match about $138,268 at 4% or $92,178 at 6%; with 100% employer match about $103,701 at 4% or $69,134 at 6%.
ALLEGRO MICROSYSTEMS INC RETIREMENT SUCCESSOR PLAN-49$269,198--
Allegro Microsystems Inc. Employees Health and Welfare Plan-816---
Allegro Microsystems Inc Salaried Employees Severance Plan-448---
Allegro Microsystems Inc Supplemental Healthcare Expense Plan-213---
20076812$95,165,520$6,673,317$8,218iApproximate average salary by contribution assumption: employee only about $205,459 at 4% or $136,973 at 6%; with 50% employer match about $136,973 at 4% or $91,315 at 6%; with 100% employer match about $102,730 at 4% or $68,486 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-812$95,165,520$6,673,317$8,218iApproximate average salary by contribution assumption: employee only about $205,459 at 4% or $136,973 at 6%; with 50% employer match about $136,973 at 4% or $91,315 at 6%; with 100% employer match about $102,730 at 4% or $68,486 at 6%.
Allegro Microsystems Inc. Hourly Health and Welfare Plan-0---
Allegro Microsystems Inc. Employees Health and Welfare Plan-440---
ALLEGRO MICROSYSTEMS INC RETIREMENT SUCCESSOR PLAN-49---
Allegro Microsystems Inc Salaried Employees Severance Plan-439---
Allegro Microsystems Inc Supplemental Healthcare Expense Plan-262---
20066850$86,859,352$7,314,822$8,606iApproximate average salary by contribution assumption: employee only about $215,142 at 4% or $143,428 at 6%; with 50% employer match about $143,428 at 4% or $95,619 at 6%; with 100% employer match about $107,571 at 4% or $71,714 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-850$86,482,458$7,223,375$8,498iApproximate average salary by contribution assumption: employee only about $212,452 at 4% or $141,635 at 6%; with 50% employer match about $141,635 at 4% or $94,423 at 6%; with 100% employer match about $106,226 at 4% or $70,817 at 6%.
ALLEGRO MICROSYSTEMS INC RETIREMENT SUCCESSOR PLAN-52$376,894$91,447$1,759iApproximate average salary by contribution assumption: employee only about $43,965 at 4% or $29,310 at 6%; with 50% employer match about $29,310 at 4% or $19,540 at 6%; with 100% employer match about $21,982 at 4% or $14,655 at 6%.
Allegro Microsystems Inc Salaried Employees Severance Plan-432---
Allegro Microsystems Inc Supplemental Healthcare Expense Plan-0---
Allegro Microsystems Inc. Hourly Health and Welfare Plan-423---
Allegro Microsystems Inc. Employees Health and Welfare Plan-433---
20056920$73,786,002$5,227,372$5,682iApproximate average salary by contribution assumption: employee only about $142,048 at 4% or $94,699 at 6%; with 50% employer match about $94,699 at 4% or $63,133 at 6%; with 100% employer match about $71,024 at 4% or $47,349 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-920$73,259,234$5,102,718$5,546iApproximate average salary by contribution assumption: employee only about $138,661 at 4% or $92,441 at 6%; with 50% employer match about $92,441 at 4% or $61,627 at 6%; with 100% employer match about $69,330 at 4% or $46,220 at 6%.
ALLEGRO MICROSYSTEMS INC RETIREMENT SUCCESSOR PLAN-56$526,768$124,654$2,226iApproximate average salary by contribution assumption: employee only about $55,649 at 4% or $37,099 at 6%; with 50% employer match about $37,099 at 4% or $24,733 at 6%; with 100% employer match about $27,825 at 4% or $18,550 at 6%.
Allegro Microsystems Inc Salaried Employees Severance Plan-425---
Allegro Microsystems Inc Supplemental Healthcare Expense Plan-134---
Allegro Microsystems Inc. Hourly Health and Welfare Plan-480---
Allegro Microsystems Inc. Employees Health and Welfare Plan-431---
20046951$68,302,357$6,645,895$6,988iApproximate average salary by contribution assumption: employee only about $174,708 at 4% or $116,472 at 6%; with 50% employer match about $116,472 at 4% or $77,648 at 6%; with 100% employer match about $87,354 at 4% or $58,236 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-951$67,720,607$6,644,715$6,987iApproximate average salary by contribution assumption: employee only about $174,677 at 4% or $116,451 at 6%; with 50% employer match about $116,451 at 4% or $77,634 at 6%; with 100% employer match about $87,339 at 4% or $58,226 at 6%.
ALLEGRO MICROSYSTEMS INC RETIREMENT SUCCESSOR PLAN-58$581,750$1,180$20iApproximate average salary by contribution assumption: employee only about $509 at 4% or $339 at 6%; with 50% employer match about $339 at 4% or $226 at 6%; with 100% employer match about $254 at 4% or $170 at 6%.
Allegro Microsystems Inc Salaried Employees Severance Plan-442---
Allegro Microsystems Inc Supplemental Healthcare Expense Plan-127---
Allegro Microsystems Inc. Hourly Health and Welfare Plan-510---
Allegro Microsystems Inc. Employees Health and Welfare Plan-440---
20035973$57,171,612$5,309,915$5,457iApproximate average salary by contribution assumption: employee only about $136,432 at 4% or $90,954 at 6%; with 50% employer match about $90,954 at 4% or $60,636 at 6%; with 100% employer match about $68,216 at 4% or $45,477 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-973$57,171,612$5,309,915$5,457iApproximate average salary by contribution assumption: employee only about $136,432 at 4% or $90,954 at 6%; with 50% employer match about $90,954 at 4% or $60,636 at 6%; with 100% employer match about $68,216 at 4% or $45,477 at 6%.
Allegro Microsystems Inc. Hourly Health and Welfare Plan-504---
Allegro Microsystems Inc Salaried Employees Severance Plan-407---
Allegro Microsystems Inc Supplemental Healthcare Expense Plan-102---
Allegro Microsystems Inc. Employees Health and Welfare Plan-416---
200261,093$46,948,940$3,224,953$2,951iApproximate average salary by contribution assumption: employee only about $73,764 at 4% or $49,176 at 6%; with 50% employer match about $49,176 at 4% or $32,784 at 6%; with 100% employer match about $36,882 at 4% or $24,588 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-1,093$46,948,940$3,224,953$2,951iApproximate average salary by contribution assumption: employee only about $73,764 at 4% or $49,176 at 6%; with 50% employer match about $49,176 at 4% or $32,784 at 6%; with 100% employer match about $36,882 at 4% or $24,588 at 6%.
Allegro Microsystems Inc Salaried Employees Severance Plan-357---
Allegro Microsystems Inc Supplemental Healthcare Expense Plan-93---
Allegro Microsystems Inc. Hourly Health and Welfare Plan-514---
Allegro Microsystems Inc. Employees Health and Welfare Plan-370---
ALLEGRO MICROSYSTEMS INC RETIREMENT SUCCESSOR PLAN-62---
200171,190$57,122,777$5,172,695$4,347iApproximate average salary by contribution assumption: employee only about $108,670 at 4% or $72,447 at 6%; with 50% employer match about $72,447 at 4% or $48,298 at 6%; with 100% employer match about $54,335 at 4% or $36,223 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-1,190$57,122,777$5,172,695$4,347iApproximate average salary by contribution assumption: employee only about $108,670 at 4% or $72,447 at 6%; with 50% employer match about $72,447 at 4% or $48,298 at 6%; with 100% employer match about $54,335 at 4% or $36,223 at 6%.
Allegro Microsystems Inc Supplemental Healthcare Expense Plan-100---
Allegro Microsystems Inc Salaried Employees Severance Plan-398---
ALLEGRO MICROSYSTEMS INC RETIREMENT SUCCESSOR PLAN-66---
Allegro Microsystems Inc. Hourly Health and Welfare Plan-526---
Allegro Microsystems Inc. Hourly Health and Welfare Plan-526---
Allegro Microsystems Inc. Employees Health and Welfare Plan-391---
200061,324$59,211,210$5,760,419$4,351iApproximate average salary by contribution assumption: employee only about $108,769 at 4% or $72,513 at 6%; with 50% employer match about $72,513 at 4% or $48,342 at 6%; with 100% employer match about $54,385 at 4% or $36,256 at 6%.
Allegro Microsystems LLC Employees' Retirement Savings Plan-1,324$59,211,210$5,760,419$4,351iApproximate average salary by contribution assumption: employee only about $108,769 at 4% or $72,513 at 6%; with 50% employer match about $72,513 at 4% or $48,342 at 6%; with 100% employer match about $54,385 at 4% or $36,256 at 6%.
ALLEGRO MICROSYSTEMS INC RETIREMENT SUCCESSOR PLAN-67---
Allegro Microsystems Inc. Employees Health and Welfare Plan-389---
Allegro Microsystems Inc. Hourly Health and Welfare Plan-882---
Allegro Microsystems Inc Salaried Employees Severance Plan-457---
Allegro Microsystems Inc Supplemental Healthcare Expense Plan-1,085---
199931,045$0$0-
Allegro Microsystems Inc Salaried Employees Severance Plan-371---
Allegro Microsystems Inc Supplemental Healthcare Expense Plan-1,045---
Allegro Microsystems Inc. Hourly Health and Welfare Plan-873---