One of the first tech companies to do so:

While we wholeheartedly support a more secure Internet, CISPA has a broad and alarming reach that goes far beyond Internet security. The bill infringes on our privacy, includes vague definitions of cybersecurity, and grants immunities to companies and government that are too broad around information misuse.

Distinguishing itself admirably from Facebook, Microsoft, IBM, Oracle, and others who have come out in support of the legislation.