This Week’s Disclosures Highlight Large Insider Buys

September 13, 2026 · Radar Report

Insider Buys Disclosed Sept. 7–13, 2026: Cascade Adds $82M of RSG.

Reviewed by CapitolRadar’s financial-disclosure editorial team.

CapitolRadar.com’s notable disclosures for September 7-13, 2026, center on corporate insiders rather than members of Congress. The headline number is concentration, not breadth: Cascade’s three RSG purchases represented about $82.05 million, or 82% of the roughly $99.67 million listed this week. Our screen of Form 4 filings retrieved Sept. 7–13 identified 12 purchases by executives, directors and a 10 percent owner; the listed transactions start at about $995,345, and no separate notability threshold is specified. It includes transactions in nine stocks, with reported amounts ranging from about $995,345 to roughly $47.2 million.

Because 82% of the listed value came from one existing 10% owner, this week signals concentrated RSG accumulation—not broad confidence among unrelated insiders.

Notable trades disclosed this week

The reported RXST transaction date, September 5, 2026, falls on a Saturday; the supplied information does not explain the non-market-day date.

RSG and WST appear more than once

Cascade Investment, L.L.C. accounted for three separate RSG purchases in the notable list. The largest was approximately $47,226,807 for 213,574 shares at $221.13 on September 9. Another purchase, dated September 8, covered 141,819 shares at $220.77 for about $31,308,898. The third was dated September 3 and totaled roughly $3,513,821 for 15,716 shares at $223.58.

WST also appeared twice. Michel Lagarde, identified as a director and President and CEO, bought 13,879 shares for approximately $4,687,632 and 11,081 shares for about $3,742,608. Both transactions carry a September 8 trade date and a price of $337.75 per share.

Post-transaction holdings for Cascade Investment, L.L.C. and Michel Lagarde were not included in the supplied information.

RSG and WST together represented approximately $90.48 million, or about 91% of listed purchase value.

The listed CEO and CFO purchases were separate from Cascade Investment, L.L.C.’s three RSG purchases as a 10 percent owner. No member of Congress appears in the supplied notable-trade list for this period; every listed transaction is identified as a corporate-insider or 10 percent owner purchase.

Disclosure dates can trail trade dates

A weekly disclosure list does not necessarily describe trades executed during that same calendar week. This roundup covers disclosures from September 7 through September 13, but some underlying transactions carry earlier trade dates, including September 3 and September 5. The table therefore separates the week in which the trades were highlighted from the date each transaction occurred.

Congressional disclosures may be filed up to 45 days after a trade; Form 4 reports are generally due within two business days, subject to limited exceptions.

CapitolRadar tracks publicly disclosed trades (STOCK Act and SEC Form 4 filings); disclosures can lag the trade by up to 45 days. This article is impersonal information for your own research, not investment advice.