$CSGP insider trading
Over the last 12 months, Costar Group insiders reported 6 buys totaling $8.5M and 8 sales totaling $534K across SEC Form 4 filings.
- Bought · 12m
- $8.5M 6 events
- Sold · 12m
- $534K 8 events
- Events · 12m
- 14 Form 4 filings, grouped
- Insiders · 12m
- 8 distinct reporters
- 10b5-1 share
- 0% of events, not dollars
All insider trades
Scroll the table sideways for price, value and marks.
| Date | Insider | Type | Shares | Avg price | Value | Δ stake | Marks |
|---|---|---|---|---|---|---|---|
| Aug 7, 2026 | Cann Cynthia CammettChief Accounting Officer · O | ▼ Sale | 4,788 | $30.78 | $147K | -20.3% | — |
| Aug 5, 2026 | Hill John WD | ▼ Sale | 3,500 | $30.21 | $106K | -13.2% | — |
| Aug 4, 2026 | FLORANCE ANDREW CFounder and CEO · O·D | ▲ Buy | 83,300 | $29.89 | $2.5M | +4.8% | — |
| May 1, 2026 | FLORANCE ANDREW CPresident and CEO · O·D | ▲ Buy | 71,430 | $35.2 | $2.5M | +4.3% | 2 tranches |
| Mar 6, 2026 | Sams Louise SD | ▲ Buy | 1,000 | $48.36 | $48K | +5.2% | — |
| Mar 2, 2026 | SAINT FREDERICK G.President, Marketplaces · O | ▲ Buy | 20,000 | $45.33 | $907K | +7.7% | — |
| Mar 2, 2026 | Glaser Rachel CD | ▲ Buy | 1,000 | $44.94 | $45K | +31.7% | — |
| Feb 27, 2026 | FLORANCE ANDREW CPresident and CEO · O·D | ▲ Buy | 55,720 | $44.52 | $2.5M | +3.6% | — |
| Feb 19, 2026 | SIMURO FRANKChief Technology Officer · O | ▽ Sale to issuer | 30,727 | — | — | -6.4% | — |
| Feb 19, 2026 | Ruggles LisaSenior VP, Global Operations · O | ▽ Sale to issuer | 17,583 | — | — | -8.5% | — |
| Feb 19, 2026 | SAINT FREDERICK G.President, Marketplaces · O | ▽ Sale to issuer | 17,583 | — | — | -6% | — |
| Feb 19, 2026 | FLORANCE ANDREW CPresident and CEO · O·D | ▽ Sale to issuer | 104,983 | — | — | -6.3% | — |
| Nov 13, 2025 | Hill John WD | ▼ Sale | 2,250 | $68.68 | $155K | -11% | — |
| Nov 13, 2025 | Cann Cynthia CammettChief Accounting Officer · O | ▼ Sale | 1,841 | $68.79 | $127K | -7.3% | — |
| Aug 28, 2025 | SAINT FREDERICK G.President, Marketplaces · O | ▼ Sale | 25,000 | $90.33 | $2.3M | -7.9% | — |
Every $CSGP filing on this page is one API call away
The same Form 4 data over REST or MCP, already grouped into events with the plan flag and the dollar value read. A free key does 100 calls a day and needs no card. Prefer email? Costar Group filings can reach your inbox instead.
Corporate insiders — officers, directors and 10%+ owners — must report their trades to the SEC on Form 4 within two business days. This page shows open-market activity: purchases (code P), sales (S) and dispositions back to the issuer (D). Scheduled compensation events such as stock grants and option exercises are also filed on Form 4 but carry no trading signal, so they are not shown and counts here can be lower than the raw EDGAR filing total. We group each filing's transactions into one economic event (a laddered 10b5-1 sale is one event, not 25 rows), flag pre-arranged plans and late filings, and link every event to its AI-scored article in the $CSGP feed.