Altair Engineering Inc.

Symbol: ALTR on Nasdaq
Entity: Company
Industry: Services Prepackaged Software (Office Of Technology)
Business address: 1820 E. Big Beaver Road, 48083 Troy, MI
Phone: 248-614-2400
State of incorporation: DE
Fiscal year end: December 31
Category: Large accelerated filer
All SEC filings: View on sec.gov

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Altair Engineering Inc. has filed 1,329 SEC EDGAR filings since 6/16/2017

Latest Filings

Form type	Document	Filing	Description	Filing date	Reporting date	File number(s)
SCHEDULE 13G/A	Open Document	Open Filing		Apr 7, 2025		005-90370
15-12G	Open Document	Open Filing	15-12G	Apr 7, 2025		001-38263
8-K	Open Document \| Data	Open Filing	8-K	Mar 28, 2025	Mar 26, 2025	001-38263
4	Open Document	Open Filing	4	Mar 26, 2025	Mar 26, 2025
SCHEDULE 13G/A	Open Document	Open Filing		Mar 26, 2025		005-90370
SCHEDULE 13G/A	Open Document	Open Filing		Mar 26, 2025		005-90370
4	Open Document	Open Filing	4	Mar 26, 2025	Mar 26, 2025
4	Open Document	Open Filing	4	Mar 26, 2025	Mar 26, 2025
4	Open Document	Open Filing	4	Mar 26, 2025	Mar 26, 2025
4	Open Document	Open Filing	4	Mar 26, 2025	Mar 26, 2025
4	Open Document	Open Filing	4	Mar 26, 2025	Mar 26, 2025
4	Open Document	Open Filing	4	Mar 26, 2025	Mar 26, 2025
4	Open Document	Open Filing	4	Mar 26, 2025	Mar 26, 2025
4	Open Document	Open Filing	4	Mar 26, 2025	Mar 26, 2025
4	Open Document	Open Filing	4	Mar 26, 2025	Mar 26, 2025
4	Open Document	Open Filing	4	Mar 26, 2025	Mar 26, 2025
4	Open Document	Open Filing	4	Mar 26, 2025	Mar 26, 2025
4	Open Document	Open Filing	4	Mar 26, 2025	Mar 26, 2025
4	Open Document	Open Filing	4	Mar 26, 2025	Mar 26, 2025
4	Open Document	Open Filing	4	Mar 26, 2025	Mar 26, 2025
4	Open Document	Open Filing	4	Mar 26, 2025	Mar 26, 2025
4	Open Document	Open Filing	4	Mar 26, 2025	Mar 26, 2025
4	Open Document	Open Filing	4	Mar 26, 2025	Mar 26, 2025
4	Open Document	Open Filing	4	Mar 26, 2025	Mar 26, 2025
4	Open Document	Open Filing	4	Mar 26, 2025	Mar 26, 2025
4	Open Document	Open Filing	4	Mar 26, 2025	Mar 26, 2025
4	Open Document	Open Filing	4	Mar 26, 2025	Mar 26, 2025
S-8 POS	Open Document	Open Filing	S-8 POS	Mar 26, 2025		333-221312
S-8 POS	Open Document	Open Filing	S-8 POS	Mar 26, 2025		333-236814
S-8 POS	Open Document	Open Filing	S-8 POS	Mar 26, 2025		333-223833
S-8 POS	Open Document	Open Filing	S-8 POS	Mar 26, 2025		333-230019
S-8 POS	Open Document	Open Filing	S-8 POS	Mar 26, 2025		333-255157
S-8 POS	Open Document	Open Filing	S-8 POS	Mar 26, 2025		333-255160
S-8 POS	Open Document	Open Filing	S-8 POS	Mar 26, 2025		333-263122
S-8 POS	Open Document	Open Filing	S-8 POS	Mar 26, 2025		333-277284
POSASR	Open Document	Open Filing	POSASR	Mar 26, 2025		333-266587
25-NSE	Open Document	Open Filing		Mar 26, 2025		001-38263
10-K/A	Open Document \| Data	Open Filing	10-K/A	Mar 25, 2025	Dec 31, 2024	001-38263
4	Open Document	Open Filing	PRIMARY DOCUMENT	Mar 21, 2025	Mar 17, 2025
4/A	Open Document	Open Filing	PRIMARY DOCUMENT	Mar 19, 2025	Mar 17, 2025
4	Open Document	Open Filing	PRIMARY DOCUMENT	Mar 19, 2025	Mar 17, 2025
4	Open Document	Open Filing	PRIMARY DOCUMENT	Mar 19, 2025	Mar 17, 2025
4	Open Document	Open Filing	PRIMARY DOCUMENT	Mar 19, 2025	Mar 17, 2025
4	Open Document	Open Filing	PRIMARY DOCUMENT	Mar 19, 2025	Mar 17, 2025
4	Open Document	Open Filing	PRIMARY DOCUMENT	Mar 19, 2025	Mar 17, 2025
4	Open Document	Open Filing	PRIMARY DOCUMENT	Mar 19, 2025	Mar 17, 2025
4	Open Document	Open Filing	PRIMARY DOCUMENT	Mar 19, 2025	Mar 17, 2025
4	Open Document	Open Filing	PRIMARY DOCUMENT	Mar 19, 2025	Mar 18, 2025
144	Open Document	Open Filing		Mar 18, 2025		001-38263
144	Open Document	Open Filing		Mar 18, 2025		001-38263

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