First Nine Months 2021 Results:
The following table represents net revenue by product grouping for the nine months ended September 30, 2021 and September 30, 2020, respectively:
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| | Nine Months Ended September 30, | | | Change | |
| | 2021 | | | 2020 | | | $ | | | % | |
| | (in thousands, except for percentages) | |
Advanced Wound Care | | $ | 309,485 | | | $ | 201,009 | | | $ | 108,476 | | | | 54 | % |
Surgical & Sports Medicine | | | 30,016 | | | | 30,482 | | | | (466 | ) | | | (2 | %) |
| | | | | | | | | | | | | | | | |
Net revenue | | $ | 339,501 | | | $ | 231,491 | | | $ | 108,010 | | | | 47 | % |
| | | | | | | | | | | | | | | | |
Net revenue for the nine months ended September 30, 2021 was $339.5 million, compared to $231.5 million for the nine months ended September 30, 2020, an increase of $108.0 million, or 47%. The increase in net revenue was driven by a $108.5 million increase, or 54%, in net revenue of Advanced Wound Care products, partially offset by a $0.5 million decrease, or 2%, in net revenue of Surgical & Sports Medicine products, compared to the nine months ended September 30, 2020.
Gross profit for the nine months ended September 30, 2021 was $257.9 million, or 76% of net revenue, compared to $169.7 million, or 73% of net revenue, for the nine months ended September 30, 2020, an increase of $88.2 million, or 52%. The increase in gross profit resulted primarily from increased sales volume due to the strength in our Advanced Wound Care products as well as a shift in product mix to our higher gross margin products.
Operating expenses for the nine months ended September 30, 2021 were $205.4 million, compared to $164.6 million for the nine months September 30, 2020, an increase of $40.8 million, or 25%. R&D expense was $22.5 million for the nine months ended September 30, 2021, compared to $13.8 million in the nine months ended September 30, 2020, an increase of $8.7 million, or 63%. Selling, general and administrative expenses were $183.0 million for the nine months ended September 30, 2021, compared to $150.8 million in the nine months ended September 30, 2020, an increase of $32.2 million, or 21%.
Operating income for the nine months ended September 30, 2021 was $52.5 million, compared to $5.1 million for the nine months ended September 30, 2020, an increase of $47.4 million.
Total other expense, net, for the nine months ended September 30, 2021 were $8.3 million, compared to $6.1 million for the nine months ended September 30, 2020, an increase of $2.2 million, or 37%.
Net income for the nine months ended September 30, 2021 was $43.2 million, or $0.32 per share, compared to a net loss of $1.1 million, or $(0.01) per share, for the nine months ended September 30, 2020, an increase of $44.3 million, or $0.33 per share.
Adjusted EBITDA of $62.8 million, or 18% of net revenue, for the nine months ended September 30, 2021, compared to $13.9 million, or 6% of net revenue, for the nine months ended September 30, 2020, an increase of $48.9 million.