Table:
|  | Pro Forma |  |
| --- | --- | --- |
|  | Year Ended December 31, |  |
|  | 2019 | 2018 |
| Revenue | $527,550 | $451,013 |
| Net income attributable to common stockholders | 51,075 | 13,264 |
| Net income attributable to common stockholders per share - basic | $1.05 | $0.27 |
| Net income attributable to common stockholders per share - diluted | $1.02 | $0.26 |
Paragraphs:
Unaudited Pro Forma Information - OpenEye
The following unaudited pro forma data is presented as if OpenEye were included in our historical consolidated statements of operations beginning January 1, 2018. These pro forma results do not necessarily represent what would have occurred if all the business combination had taken place on January 1, 2018, nor do they represent the results that may occur in the future.
This pro forma financial information includes our historical financial statements and those of our OpenEye business combination with the following adjustments: (i) we adjusted the pro forma amounts for income taxes, (ii) we adjusted for amortization expense assuming the fair value adjustments to intangible assets had been applied beginning January 1, 2018, and (iii) we adjusted for transaction fees incurred and reclassified them to January 1, 2018.
The pro forma adjustments were based on available information and upon assumptions that we believe are reasonable to reflect the impact of these acquisitions on our historical financial information on a supplemental pro forma basis, as follows (in thousands, except per share data):
Question:
What was the change in the Net income attributable to common stockholders between 2018 and 2019?
Answer: 51075-13264 = 37811