Robert W. Musslewhite

Executive Vice President, ADVISORY BOARD CO.

Companies

Cardinal HealthBoard member Mar 11, 2025 to now¹
CoStar GroupBoard member Dec 23, 2019 to now²
Definitive Healthcare Corp.Chief executive officer Oct 12, 2022 to Jan 9, 2024³
Definitive Healthcare Corp.Board member Sep 15, 2021 to Jan 9, 2024⁴
Definitive Healthcare Corp.President Oct 8, 2021 to May 5, 2022⁵
Evolent Health, Inc.Board member Jun 5, 2015 to Jun 5, 2015⁶

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

As of each latest filing. The line shows shares held over time.

Jun 23, 2026Granted 8,262 shares of CoStar Group⁸
Nov 5, 2025Granted 1,067 shares of Cardinal Health⁹
Sep 9, 2025Granted 3,121 shares of CoStar Group¹⁰
Mar 15, 2025Granted 1,049 shares of Cardinal Health¹¹
Jul 17, 2024Granted 3,293 shares of CoStar Group¹²
Jan 7, 2024Shares withheld for tax 14,207 shares at $9.00 of Definitive Healthcare Corp.⁷
Nov 4, 2023Shares withheld for tax 12,656 shares at $7.27 of Definitive Healthcare Corp.¹³
Oct 30, 2023Granted 3,532 shares of CoStar Group¹⁴
Oct 7, 2023Shares withheld for tax 20,016 shares at $7.20 of Definitive Healthcare Corp.¹⁵
Aug 4, 2023Shares withheld for tax 12,657 shares at $11.31 of Definitive Healthcare Corp.¹⁶
Jul 7, 2023Shares withheld for tax 20,016 shares at $10.67 of Definitive Healthcare Corp.¹⁷
May 4, 2023Shares withheld for tax 53,587 shares at $9.90 of Definitive Healthcare Corp.¹⁸
Apr 7, 2023Shares withheld for tax 15,616 shares at $10.47 of Definitive Healthcare Corp.¹⁹
Feb 16, 2023Granted 368,422 shares of Definitive Healthcare Corp.²⁰
Jan 7, 2023Shares withheld for tax 14,026 shares at $10.41 of Definitive Healthcare Corp.²¹
Oct 7, 2022Shares withheld for tax 70,658 shares at $14.82 of Definitive Healthcare Corp.²²
Sep 14, 2022Granted 3,380 shares of CoStar Group²³
May 3, 2022Granted 83,333 shares of Definitive Healthcare Corp.²⁴
May 3, 2022Granted 333,322 shares of Definitive Healthcare Corp.²⁴
Oct 7, 2021Granted 650,000 shares of Definitive Healthcare Corp.²⁵

The numbers on this page point here. Each one links to the record it came from.