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ALTR

Altair Engineering Inc.

Total Trades

257

Buys

0

Sells

221

Largest Trade

N/A

Insiders

20

Institutional Funds

1

Inst. Value

$1K–$15K

Activist Filings

19

Insider Trades

Insider	Title	Type	Value	Shares	Price	Date
Messano Amy	Chief Marketing Of…	SELL	$15K–$50K	396	$64.55	Mar 10, 2022
Saravia Gilma	Chief People Officer	SELL	$50K–$100K	816	$64.55	Mar 10, 2022
Marraccini Jeffrey	See Remarks	SELL	$1K–$15K	91	$64.55	Mar 10, 2022
Maitra Raoul	Chief Legal Officer	SELL	$1K–$15K	91	$64.55	Mar 10, 2022
Scapa James Ralph	CEO	SELL	$100K–$500K	2K	$64.55	Mar 10, 2022
Dias Nelson	Chief Revenue Offi…	SELL	$1K–$15K	105	$64.55	Mar 10, 2022
Scapa James Ralph	CEO	SELL	$50K–$100K	2K	$28.83	Feb 2, 2022

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Institutional Ownership

13F filings as of Dec 31, 2025 · 1 funds holding

Fund	Shares	Value	Type
HUNTINGTON NATIONAL BANK	1	$1K–$15K	SH

Activist & 5%+ Owners

SC 13D/13G filings — investors holding 5%+ of outstanding shares

Matrix Capital Management Company, LP

SC 13G/A · Apr 7, 2025

0.0%

0 shares

James Ralph Scapa

SC 13G/A · Mar 26, 2025

0.0%

0 shares

George J. Christ

SC 13G/A · Mar 26, 2025

0.0%

0 shares

BlackRock, Inc.

SC 13G/A · Feb 5, 2025

12.5%

7.5M shares

Pictet Asset Management SA The reporting person disclaim beneficial ownership of the shares reported, which are owned of record and beneficially by Pictet Asset Management SA. 2

SC 13G · Nov 21, 2024

3.8%

2.3M shares

Matrix Capital Management Company LP

SC 13G/A · Nov 13, 2024

20.9%

12.4M shares

James Ralph Scapa (2)

SC 13G/A · Nov 8, 2024

22.3%

17.1M shares

George J. Christ (2)

SC 13G/A · Nov 8, 2024

13.9%

9.5M shares

BlackRock, Inc.

SC 13G/A · Jul 8, 2024

13.8%

7.9M shares

The Vanguard Group - 23-1945930

SC 13G/A · Feb 13, 2024

10.6%

5.8M shares

Matrix Capital Management Company LP

SC 13G/A · Feb 13, 2024

22.4%

12.2M shares

James Ralph Scapa (2)

SC 13G/A · Feb 13, 2024

23.9%

17.1M shares

George J. Christ (2)

SC 13G/A · Feb 13, 2024

15.8%

10.2M shares

Pictet Asset Management SA The reporting person disclaim beneficial ownership of the shares reported, which are owned of record and beneficially by Pictet Asset Management SA.

SC 13G · Jan 31, 2024

5.3%

2.9M shares

BlackRock, Inc.

SC 13G/A · Jan 25, 2024

8.4%

4.6M shares

The Vanguard Group - 23-1945930

SC 13G/A · Jun 9, 2023

10.1%

5.4M shares

Matrix Capital Management Company LP

SC 13G/A · Feb 13, 2023

20.8%

10.9M shares

BlackRock, Inc.

SC 13G/A · Jan 31, 2023

7.7%

4.1M shares

Matrix Capital Management Company LP

SC 13G/A · Feb 14, 2022

16.9%

8.6M shares