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.

• Raymond James analyst John Ransom downgraded the rating for HCA Healthcare, Inc. (NYSE:HCA) from Outperform to Market Perform. HCA Healthcare shares closed at $332.24 on Thursday. See how other analysts view this stock.
• JMP Securities analyst Matthew Carletti downgraded the rating for Root, Inc. (NASDAQ:ROOT) from Market Outperform to Market Perform. Root shares closed at $109.40 on Thursday. See how other analysts view this stock.
• Needham analyst Mike Matson downgraded TransMedics Group, Inc (NASDAQ:TMDX) from Buy to Hold and maintained the price target of $109. TransMedics shares closed at $79.34 on Thursday. See how other analysts view this stock.
• Keybanc analyst Steve Barger downgraded the rating for The Timken Company (NYSE:TKR) from Overweight to Sector Weight. Timken shares closed at $75.22 on Thursday. See how other analysts view this stock.
• B. Riley Securities analyst Alex Rygiel downgraded Atkore Inc. (NYSE:ATKR) from Buy to Neutral and lowered the price target from $135 to $84. Atkore shares closed at $85.14 on Thursday. See how other analysts view this stock.

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

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