Dell, Silver Lake Said to Reap 90% Gain a Year After LBO

A year after taking Dell Inc. private in a $24.9 billion buyout, Chief Executive Officer Michael Dell and private equity firm Silver Lake Management LLC have made a paper gain of at least 90 percent on their investment, two people with knowledge of the matter said.

Silver Lake last year invested $1.4 billion and Dell himself put in a stake worth $4.2 billion to take the company private, with the rest of the transaction financed by debt and cash from the personal-computer maker. Now Dell’s equity value stands at $10.8 billion or more, based on valuations of Hewlett-Packard Co. and other publicly traded rivals, said the people, who asked not to be identified because the details are private.