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  • Insider Ownership

Insider Trading & Ownership of John W. Pietrowicz

Location
Chicago, IL
Summary
The estimated net worth of John W. Pietrowicz is at least $12,116,591 dollars as of 18 Mar 2026. John W. Pietrowicz is the Sr MD Chief Financial Officer of CME GROUP INC. and owns shares of CME GROUP INC. (CME) stock worth about $11.18M. John W. Pietrowicz is the Director of Marex Group plc and owns shares of Marex Group plc (MRX) stock worth about $934.2K.
Signature
/s/ Scott Linsley, as Attorney-in-Fact
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Quick Takeaways

  • John W. Pietrowicz has 2 issuer positions tracked on this page.
  • Estimated disclosed ownership value: $12,116,591.
  • Recent insider filing activity is available below.

What Changed

  • Largest disclosed position: CME GROUP INC. ($11,182,381).
  • Past-year value change for that position: .

Why This Matters

  • This page translates Forms 3/4/5 into a quick ownership context before you inspect each transaction row.
  • You can cross-check role, issuer, and filing chronology directly against the SEC source.

Source Evidence

Filed on Form 4

Insider ownership context is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Ownership of John W. Pietrowicz

Symbol Company Relationship Holdings Value Past Year Net Change Change % Report Period
CME CME GROUP INC. Sr MD Chief Financial Officer $11,182,381 15 Sep 2022
MRX Marex Group plc Director $934,210 18 Mar 2026

Insider Transactions Reported by John W. Pietrowicz:

Sym Company Class Transaction % Value $ * Price $ Shares Shares After Date Ownership
* An asterisk sign (*) next to the price indicates that the price is likely invalid.