| (Unaudited) | |||||||||||||||
| Three Months Ended | |||||||||||||||
| (in thousands) |
March 31,
2020 |
June 30,
2020 |
Sept 30,
2020 |
December 31,
2020 | |||||||||||
| Net income (loss) | $ | 6,030 | $ | (10,223 | ) | $ | (8,505 | ) | $ | 2,198 | |||||
| Stock-based compensation expense | 3,171 | 4,534 | 6,234 | 7,416 | |||||||||||
| Amortization of intangible assets | 3,840 | 3,692 | 3,858 | 4,986 | |||||||||||
| Non-cash interest expense | 2,648 | 2,689 | 2,725 | 2,762 | |||||||||||
| Special adjustments and other | — | 578 | (950 | ) | — | ||||||||||
| Impact of non-GAAP tax rate | (637 | ) | 1,718 | 1,294 | (2,900 | ) | |||||||||
| Non-GAAP net income | $ | 15,052 | $ | 2,988 | $ | 4,656 | $ | 14,462 | |||||||
Altair Announces Fourth Quarter 2020 Financial Results
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For comparability purposes, the following table provides a reconciliation of the Quarterly Non-GAAP net income results for 2020 to GAAP net income (loss) for 2020, reflecting the 2021 definition:
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