Top Wall Street analysts changed their outlook on these top names. For a complete view of all analyst rating changes, including upgrades and downgrades, please see our analyst ratings page.

• JP Morgan analyst Sebastiano Petti upgraded the rating for Lumen Technologies, Inc. (NYSE:LUMN) from Underweight to Neutral. Lumen shares gained 93.1% to close at $5.00 on Tuesday. See how other analysts view this stock.
• B of A Securities analyst Jason Kupferberg upgraded Cognizant Technology Solutions Corporation (NASDAQ:CTSH) from Underperform to Neutral and raised the price target from $73 to $75. Cognizant Tech shares gained 1.3% to close at $72.65 on Tuesday. See how other analysts view this stock.
• Mizuho analyst Brett Linzey upgraded the rating for Vertiv Holdings Co (NYSE:VRT) from Neutral to Outperform, while slashing the price target from $95 to $92. Vertiv shares gained 2.3% to close at $69.27 on Tuesday. See how other analysts view this stock.
• Deutsche Bank analyst Emmanuel Papadakis upgraded BioNTech SE (NASDAQ:BNTX) from Hold to Buy and maintained the price target of $95. BioNTech shares gained 1.5% to close at $79.50 on Tuesday. See how other analysts view this stock.
• Baird analyst David Manthey upgraded the rating for Builders FirstSource, Inc. (NYSE:BLDR) from Neutral to Outperform and raised the price target from $185 to $190. Builders FirstSource shares gained 4.1% to close at $155.73 on Tuesday. See how other analysts view this stock. See how other analysts view this stock.

Considering buying Cognizant stock? Here's what analysts think:

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