OTHER ASSETS, NET

12 Months Ended

Dec. 31, 2022

9. OTHER ASSETS, NET

Other assets, net consisted of the following as of December 31, 2022 and 2021 (in millions):


	December 31,		December 31,
	2022		2021
Software development work in progress	$	8.9	$	5.6
Data processing software		124.2		103.8
Less accumulated depreciation and amortization		(78.8)		(70.9)
Data processing software, net		54.3		38.5
Other assets (1)		127.6		87.3
Other assets, net	$	181.9	$	125.8

(1)

At December 31, 2022 and December 31, 2021, the majority of the balance included long-term prepaid assets and notes receivable. See Note 8 (“Credit Losses”) for more information on the notes receivable included within other assets, net on the consolidated balance sheets. As of December 31, 2022 and December 31, 2021, the notes receivable, net balance was $102.9 million and $79.3 million, respectively. At December 31, 2022, a contra-revenue asset totaling $19.9 million, which arose from the issuance of Cboe Digital Restricted Common Units and Warrants, is included in other assets, net. The issuance of Cboe Digital Restricted Common Units and Warrants is described in Note 19 (“Stock-based Compensation”).

Amortization expense related to data processing software was $7.2 million, $7.3 million, and $6.9 million for the years ended December 31, 2022, 2021, and 2020, respectively.