The forms below do not constitute tax advice, and shareholders should consult their own tax advisors regarding the particular consequences of the transactions to them.

SendGrid: This IRS Form 8937 provides information regarding the effect of the Twilio Inc. transaction on the basis of SendGrid, Inc. and Twilio Inc. stock outstanding prior to these transactions.

Segment: ThisĀ IRS Form 8937 provides information regarding the effect of the Twilio Inc. transaction on the basis of Segment, Inc. and Twilio Inc. stock outstanding prior to these transactions.

Zipwhip: ThisĀ IRS Form 8937 provides information regarding the effect of the Twilio Inc. transaction on the basis of Zipwhip, Inc. and Twilio Inc. stock outstanding prior to these transactions.