A new filing with the U.S. Securities and Exchange Commission has revealed that Apple CEO Tim Cook recently gifted 23,215 Apple shares – equal to about $5 million – to an undisclosed charity.

As the shares were donated rather than shared, the filing did not report the transfer’s monetary value. However, the gifting of directly-owned company stock happened this week, AppleInsider points out – putting the value in the region of $5 million, judging from Apple’s recent share prices.

At the close of business on Tuesday, the day of the filing’s publication, Apple stock rested at $215.04. This would bring the donation’s worth to $4,992,154 – but, as the exact timing of the donation is unknown, neither is the precise figure.

Also unknown is the charity which received Cook’s donation. Though it is necessary for corporate leaders to disclose movements in owned shares, they can stop short of naming the transaction’s recipient. In any case, Cook has a long history of contributing to charitable causes.

In 2014, Cook used the Charitybuzz website to auction off a lunch with himself. This helped him to raise over $330,000 for the Robert F. Kennedy Center for Justice and Human Rights, adding to the $610,000 that Cook had previously raised for the organization through a separate auction in 2013.

The post Tim Cook donates about $5 million in Apple stock to charity appeared first on AppleMagazine.