I'm not going to update this but I put in bold players that are 100% gone and in italics those that could return. Here are the Big Ten players on ESPN's Top 100:
4. Jaden Ivey - Purdue
5. Keegan Murray - Iowa
9. Johnny Davis - Wisconsin
16. Malaki Branham - Ohio State
21. EJ Liddell - Ohio State
29. Bryce McGowens - Nebraska
42. Max Christie - Michigan State
49. Trevion Williams - Purdue
67. Ron Harper Jr. - Rutgers
68. Caleb Houstan - Michigan
69. Zach Edey - Purdue
72. Trayce Jackson-Davis - Indiana
74. Moussa Diabate - Michigan
88. Gabe Brown - Michigan State
91. Kofi Cockburn - Illinois
98. Kris Murray - Iowa
Others:
Marcus Bingham - Michigan State
Jaden Jones - Rutgers
I did find this tracker but it doesn't say who signed with an agent.
www.cbssports.com
4. Jaden Ivey - Purdue
5. Keegan Murray - Iowa
9. Johnny Davis - Wisconsin
16. Malaki Branham - Ohio State
21. EJ Liddell - Ohio State
29. Bryce McGowens - Nebraska
42. Max Christie - Michigan State
49. Trevion Williams - Purdue
67. Ron Harper Jr. - Rutgers
68. Caleb Houstan - Michigan
69. Zach Edey - Purdue
72. Trayce Jackson-Davis - Indiana
74. Moussa Diabate - Michigan
88. Gabe Brown - Michigan State
91. Kofi Cockburn - Illinois
98. Kris Murray - Iowa
Others:
Marcus Bingham - Michigan State
Jaden Jones - Rutgers
I did find this tracker but it doesn't say who signed with an agent.

2022 NBA Draft underclassmen decision tracker: Takeaways after deadline to declare
A look at the list of underclassmen who have declared for the NBA Draft
