Louise Sams Biography and Net Worth

Director of CoStar Group

Louise Sams, CoStar Group’s Board Chair, has served on the CoStar Group Board since 2019, and is a veteran public company executive who brings considerable legal expertise. Ms. Sams most recently served as the Executive Vice President and General Counsel of Turner Broadcasting System, Inc., for nearly two decades. In this role she oversaw the legal work relating to all of the business activities of Turner and its subsidiaries worldwide with a focus on issues related to technology, information security, use of data and consumer privacy, as well as enterprise-wide risk management. She also served as President, Turner Broadcasting System International, Inc. from 2003 until 2012. Prior to joining Turner, she was an associate at White & Case, specializing in mergers and acquisitions and securities law. Ms. Sams holds a J.D. from the University of Virginia School of Law, and a bachelor’s from Princeton University.

What is Louise S. Sams' net worth?: The estimated net worth of Louise S. Sams is at least $994.12 thousand as of March 6th, 2026. Sams owns 20,409 shares of CoStar Group stock worth more than $994,122 as of March 9th. This net worth evaluation does not reflect any other investments that Sams may own. Learn More about Louise S. Sams' net worth.
How do I contact Louise S. Sams?: The corporate mailing address for Sams and other CoStar Group executives is 1331 L STREET NW, WASHINGTON DC, 20005. CoStar Group can also be reached via phone at (202) 346-6500 and via email at [email protected]. Learn More on Louise S. Sams' contact information.
Has Louise S. Sams been buying or selling shares of CoStar Group?: During the past quarter, Louise S. Sams has bought $48,360.00 of CoStar Group stock. Most recently, on Friday, March 6th, Louise S. Sams bought 1,000 shares of CoStar Group stock. The stock was acquired at an average cost of $48.36 per share, with a total value of $48,360.00. Following the completion of the transaction, the director now directly owns 20,409 shares of the company's stock, valued at $986,979.24. Learn More on Louise S. Sams' trading history.
Who are CoStar Group's active insiders?: CoStar Group's insider roster includes Michael Desmarais (Insider), Andrew Florance (CEO), John Hill (Director), Laura Kaplan (Director), Michael Klein (Director), Lisa Ruggles (VP), Frederick Saint (Insider), Louise Sams (Director), Frank Simuro (CTO), and Scott Wheeler (CFO). Learn More on CoStar Group's active insiders.
Are insiders buying or selling shares of CoStar Group?: During the last year, CoStar Group insiders bought shares 1 times. They purchased a total of 1,000 shares worth more than $48,360.00. During the last year, insiders at the technology company sold shares 4 times. They sold a total of 53,782 shares worth more than $4,917,509.15. The most recent insider tranaction occured on March, 6th when Director Louise S Sams bought 1,000 shares worth more than $48,360.00. Insiders at CoStar Group own 1.1% of the company. Learn More about insider trades at CoStar Group.
Information on this page was last updated on 3/6/2026.

Louise S. Sams Insider Trading History at CoStar Group

Transaction Date	Buy/Sell	Number of Shares	Average Share Price	Total Transaction	Shares Held After Transaction	Details
3/6/2026	Buy	1,000	$48.36	$48,360.00	20,409

Louise S. Sams Buying and Selling Activity at CoStar Group

CoStar Group Company Overview

CoStar Group, Inc. provides information, analytics, and online marketplace services to the commercial real estate, hospitality, residential, and related professionals industries in the United States, Canada, Europe, the Asia Pacific, and Latin America. The company offers CoStar Property that provides inventory of office, industrial, retail, multifamily, hospitality, and student housing properties and land; CoStar Sales, a robust database of comparable commercial real estate sales transactions; CoStar Market Analytics to view and report on aggregated market and submarket trends; and CoStar Tenant, an online business-to-business prospecting and analytical tool that provides tenant information. It also provides Leasing, a tool to capture, manage, and maintain lease data; CoStar Lease Analysis; Public Record, a searchable database of commercially zoned parcels; CoStar Real Estate Manager, a real estate lease administration, portfolio management, and lease accounting compliance software solution; and CoStar Risk Analytics and CoStar Investment. In addition, it offers apartment marketing sites, such as ApartmentFinder.com, ForRent.com, ApartmentHomeLiving.com, WestsideRentals.com, AFTER55.com, CorporateHousing.com, ForRentUniversity.com, Apartamentos.com, and Off Campus Partners; LoopNet Premium Lister; LoopNet Diamond, Platinum, and Gold Ads; LandsofAmerica.com, LandAndFarm.com, and LandWatch.com for rural land for-sale; BizBuySell.com, BizQuest.com, and FindaFranchise.com for operating businesses and franchises for-sale; Ten-X, an online auction platform for commercial real estate; and HomeSnap, an online and mobile software platform, as well as Homes.com, a homes for sale listings site. The company was founded in 1987 and is headquartered in Washington, the District of Columbia.

Today's Range

Now: $48.46

$47.62

$48.93

50 Day Range

MA: $56.48

$44.63

$67.86

2 Week Range

Now: $48.46

$43.16

$97.43

Volume

3,330,840 shs

Average Volume

7,211,378 shs

Market Capitalization

$20.34 billion

P/E Ratio

4,850.35

Dividend Yield

N/A

Beta

0.9