Salesforce owns $1 billion worth of other companies - here are its four biggest investments

Salesforce is a big investor in Twilio, the cloud communication company that went public in 2016. Twilio stock is on something of a bull run: It's now trading at about $74 a share — up from $31 in the August of 2017.

Salesforce owns 888,517 shares in the company, for a total investment valued at $49.775 million. That makes Twilio its third-largest investment.

Salesforce swooped in just before Dropbox's March IPO to make a whopping $100 million investment — one of its largest strategic investments ever. Before that, Salesforce had previously invested $5 million into the file sharing and collaboration software company.

Now Salesforce owns 4,938,567 shares, which is worth $160.1 million, according to the filing. While Salesforce owns more stock in Dropbox than in any other company, it's only the second largest investment by value.

Salesforce's highest-value investment is in the e-signature company DocuSign, which went public at the end of April.

Salesforce owns 4,534,239 shares in DocuSign, worth a total of $240.088 million. Salesforce owns slightly fewer shares of DocuSign than Dropbox, but the price of each stock makes DocuSign Salesforce's biggest investment in terms of dollars and cents.