Recent insider transactions reported to the SEC on Form 4 — directors and officers buying or selling their own company’s stock. Sourced directly from public SEC filings, latest filed Sep 28, 2026.
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Counts cover the 32 most recent Form 4 filings Tradune holds for CME (filed Jun 29 – Sep 28, 2026); the score below covers only the trailing 90 days (1 buy, 3 sells). No completed check of CME's Form 4 list on SEC EDGAR is on record yet; the latest CME filing Tradune holds was filed Sep 28, 2026. This is not guaranteed to be the complete record — see CME's full Form 4 filing history on SEC EDGAR.
Open-market activity, last 90 days
Purchases (Form 4 code P) and sales (code S) on the 14 filings Tradune holds for CME filed Sep 11 – Sep 28, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
filed before Apr 1, 2023, or no checkbox value in the filing data
Counts are Form 4 lines as filed. The checkbox is one per filing, so every sale on a filing with the box checked is counted there even if only some of its transactions were under a plan; it records what the filer disclosed, and the three categories are not a judgement about why a sale was made.
Open-market purchases and sales by insider
Insider
Buys
Sells
Shares bought
Shares sold
Value
Terrence A. DuffyChairman and CEO
0
2
—
15,000
−$4,116,539
Elizabeth A. CookDirector
0
1
—
500
−$140,055
William R. ShepardDirector
1
0
293
—
+$78,626
Value = shares × the price reported on each Form 4 (+ purchases, − sales); every open-market line in this window disclosed a price.
Insider-activity score
39/ 100
Net insider sales
1 distinct buyer1 buy · 3 sell txofficer buying
Summarises ~90 days of public SEC Form 4 activity — more distinct buyers, officer involvement and net buying score higher. A description of filing activity, not a rating or buy signal. How this score is computed →
How to read this: an open-market purchase (Form 4 code P) is a buy at the market price with the insider’s own money, as opposed to a grant, award or option exercise; an open-market sale is code S. When two or more distinct insiders report open-market purchases in the same 90-day window, this site labels that a cluster — a definition, not a forecast; see insider cluster buying.
“Held after” is Form 4 Table I column 5; “Change” = shares ÷ holdings before the trade (held after − shares for an acquisition, held after + shares for a disposition).
Insider Buying at CME
Insiders reported 3 open-market purchases of CME between Jun 29, 2026 and Sep 28, 2026, across 1 distinct buyer.
The most recent purchase was reported by William R. Shepard (Director) on Sep 25, 2026.
Grants, option exercises, and tax-withholding transactions are excluded from these counts.
† change in this filer’s own reported holding line (Form 4 Table I, col. 5), not of total company ownership; small prior holdings produce large percentages, so under 100 shares the prior holding is shown instead.
“10b5-1 box checked” = the filer checked the Form 4 box stating that a transaction on the filing was made under a plan intended to satisfy Rule 10b5-1(c); “10b5-1 box not checked” = the box was left blank, which does not prove that no plan exists. The box applies to Form 4s filed from April 1, 2023; older filings, and boxes we could not read, carry no tag. What the 10b5-1 box means.
Listing the 25 most recent of 32 Form 4 filings held for CME; the 7 older filings (filed Jun 29 – Jun 29, 2026) are counted above but not listed here — see CME's full Form 4 filing history on SEC EDGAR.
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to CME's (Sep 28, 2026).
How many insiders bought CME stock in these Form 4 filings?
1 distinct insider at CME Group Inc reported 3 open-market purchases (Form 4 code P) of CME shares between Jun 29, 2026 and Sep 28, 2026, the most recent filed by William R. Shepard (Director) on Sep 25, 2026. Grants, option exercises, and tax-withholding transactions are excluded from these counts.
Who filed the most recent Form 4 for CME?
The most recent Form 4 on this page was filed by William R. Shepard (Director) on Sep 28, 2026, reporting 3 transactions. The original document is linked from the filing list above on SEC EDGAR. Amended filings (Form 4/A) may later revise reported figures.
What was the largest open-market CME insider sale shown?
The largest open-market sale among the filings shown was 14,372 CME shares at $274.41 (about $3,943,821) by Terrence A. Duffy (Chairman and CEO) on Sep 10, 2026. Value is shares × the price reported on the Form 4; its Rule 10b5-1 box is not checked.
Do the recent CME insider purchases have the Form 4 10b5-1 box checked?
No. All 3 CME open-market purchases shown were reported with the Rule 10b5-1 box not checked. A blank box records what the filer disclosed; it does not prove that no plan exists. Latest: William R. Shepard (Director) on Sep 25, 2026, 293 shares.
New to Form 4s? The transaction codes, the 90-day window and the 0–100 score are defined on the insider-activity score methodology page.
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This score summarizes SEC Form 4 filing activity over the trailing 90 days. It is descriptive, not predictive — not a rating, recommendation, or investment advice. Data: SEC EDGAR (public domain), as filed; amendments may revise figures. Tradune is not a registered investment adviser.
Data as filed; amended filings (Form 4/A) may revise figures. Sales may occur under prearranged Rule 10b5-1 trading plans.