7 U.S. lawmakers have disclosed 18 CoStar Group, Inc. trades under the STOCK Act — 4 buys and 14 sells between 2015 and 2025. Congress has been net sellers of CSGP, and their disclosed buys are down 60.5% versus the latest close.
*Notional-weighted price return on lawmakers' disclosed buys of CSGP, marked to the latest close — per-share (share counts aren't disclosed).
Lawmakers ranked by notional-weighted return on their disclosed CSGP buys (last ~3y), marked to the latest close.
| Date | Member | Type | Amount | Est. price | Latest close | Return |
|---|---|---|---|---|---|---|
| 2025-09-25 | Lisa McClain | SELL | $1K–$15K | $83.09 | $33.05 2026-08-13 | +60.2% exit |
| 2025-07-31 | Gilbert Cisneros | BUY | $1K–$15K | $95.19 | $33.05 2026-08-13 | -65.3% |
| 2025-07-09 | Gilbert Cisneros | BUY | $1K–$15K | $84.50 | $33.05 2026-08-13 | -60.9% |
| 2025-01-21 | William R. Keating | BUY | $1K–$15K | $74.16 | $33.05 2026-08-13 | -55.4% |
| 2020-10-13 | Greg Gianforte | SELL | $1K–$15K | $88.32 | $33.05 2026-08-13 | +62.6% exit |
| 2020-09-24 | Greg Gianforte | SELL | $100K–$250K | $81.92 | $33.05 2026-08-13 | +59.6% exit |
| 2020-05-07 | Greg Gianforte | SELL | $50K–$100K | $63.90 | $33.05 2026-08-13 | +48.3% exit |
| 2020-01-17 | Josh Gottheimer | SELL | $1K–$15K | $64.96 | $33.05 2026-08-13 | +49.1% exit |
| 2019-11-22 | Josh Gottheimer | SELL | $1K–$15K | $59.06 | $33.05 2026-08-13 | +44.0% exit |
| 2019-10-09 | Gilbert Cisneros | SELL | $1K–$15K | $60.03 | $33.05 2026-08-13 | +45.0% exit |
| 2019-09-26 | Gilbert Cisneros | SELL | $1K–$15K | $59.46 | $33.05 2026-08-13 | +44.4% exit |
| 2019-09-10 | Gilbert Cisneros | SELL | $1K–$15K | $57.97 | $33.05 2026-08-13 | +43.0% exit |
| 2019-09-06 | Greg Gianforte | SELL | $50K–$100K | $61.60 | $33.05 2026-08-13 | +46.4% exit |
| 2019-04-23 | Susie Lee | SELL | $1K–$15K | $49.51 | $33.05 2026-08-13 | +33.2% exit |
| 2018-06-28 | Lamar Smith | SELL | $1K–$15K | $41.53 | $33.05 2026-08-13 | +54.8% rt |
| 2017-10-27 | Greg Gianforte | SELL | $100K–$250K | $29.94 | $33.05 2026-08-13 | -10.4% exit |
| 2017-09-29 | Lamar Smith | BUY | $1K–$15K | $26.82 | $33.05 2026-08-13 | +23.2% |
| 2015-06-03 | Lamar Smith | SELL | $1K–$15K | $20.77 | $33.05 2026-08-13 | -59.1% exit |
Return: buys marked to the latest close (open); sells tagged rt are realized round-trips vs a prior disclosed buy; exit = timing (stock move after the sale, seller's perspective).
7 members of the U.S. House and Senate have disclosed CoStar Group, Inc. transactions under the STOCK Act — 4 purchases and 14 sales. The full member-by-member breakdown, with dates and dollar ranges, is in the table above.
No member of Congress has disclosed a CSGP purchase in the last 90 days. STOCK Act filings lag the trade by up to 45 days, so newer buys may still be pending disclosure.
Notional-weighted, lawmakers' disclosed CSGP buys are down 60.5% versus the latest close of $33.05. Each trade's own return — and realized round-trips on matched sells — is in the Return column.
Yes. Under the 2012 STOCK Act, members of Congress may buy and sell individual stocks but must publicly disclose each transaction within 45 days. Bargo surfaces those filings so you can see who traded CSGP and how it performed.