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Employer with a benefit plan

ALTAIR ENGINEERING, INC.

The Employer Identification Number (EIN) for ALTAIR ENGINEERING, INC. is 38-2591828.

At a glance

EIN
38-2591828 · 382591828
Legal name
ALTAIR ENGINEERING, INC.
Also filed as
ALTAIR, INC.
Address on file
1820 EAST BIG BEAVER ROAD, TROY, MI 48083
Records show
SEC filer; employer with a benefit plan; state registration
Latest record
2026-07-10

State registration

Florida Division of Corporations (Sunbiz) bulk data · records as of 2026-07-10

Florida registration
Inactive · Foreign profit corporation
Source: Florida registry · as of 2026-07-10
Florida document number
F20000002962
Source: Florida registry · as of 2026-07-10
Registered in Florida
2020-06-24
Source: Florida registry · as of 2026-07-10
Registered agent
C T CORPORATION SYSTEM
Source: Florida registry · as of 2026-07-10
Last registry activity
2026-01-27
Source: Florida registry · as of 2026-07-10

Benefit plans

DOL Form 5500 filings (EFAST2) · records as of 2026-02-11

Benefit plan 501, 2024 filing
ALTAIR ENGINEERING INC. CAFETERIA PLAN
Source: DOL 5500 · as of 2026-02-11
Participants (start of year)
991
Source: DOL 5500 · as of 2026-02-11
Plan features
Health (other than dental or vision); Life insurance; Dental; Vision; Long-term disability; Death benefits (other than life insurance)
Source: DOL 5500 · as of 2026-02-11
Plan type
Single-employer plan
Source: DOL 5500 · as of 2026-02-11
Business code (NAICS)
511210
Source: DOL 5500 · as of 2026-02-11
Benefit plan 1, 2024 filing
ALTAIR SALARY REDUCTION PROFIT SHARING PLAN
Source: DOL 5500 · as of 2025-10-05
Participants (start of year)
1,602
Source: DOL 5500 · as of 2025-10-05
Plan features
Profit-sharing; ERISA 404(c) plan; Participant-directed; 401(k) feature; 401(m) matching; Pension plan with defined contribution
Source: DOL 5500 · as of 2025-10-05
Plan type
Single-employer plan
Source: DOL 5500 · as of 2025-10-05

What this record is

Public filings that carry this EIN (DOL Form 5500 filings (EFAST2), Florida Division of Corporations (Sunbiz) bulk data and SEC EDGAR company filings), shown as filed. Nothing is scraped from the IRS, and a public-record match is not IRS TIN validation.

What it is not

Registry status, formation date, and registered agent come from the Michigan Department of Licensing and Regulatory Affairs (LARA), Corporations, Securities and Commercial Licensing Bureau, Corporations Division; see the Michigan business entity search.

If something is wrong

A name, address, or classification here is what the source published. To correct the source, file with it; to have this page removed, see corrections and removal.

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