• Info
  • Insider Ownership

Insider Trading & Ownership of Stephen P. Macmillan

Location
Marlborough, MA
Summary
The estimated net worth of Stephen P. Macmillan is at least $190,947,402 dollars as of 18 Nov 2025. Stephen P. Macmillan is the Chairman, President and CEO, Director of HOLOGIC INC and owns shares of HOLOGIC INC (HOLX) stock worth about $190.42M. Stephen P. Macmillan is the Director of ILLUMINA, INC. and owns shares of ILLUMINA, INC. (ILMN) stock worth about $527.5K.
Signature
/s/ Mark W. Irving, attorney-in-fact for Mr. MacMillan
All Insider Reports
All Insider Reports

Follow Filing Activity

Follow Stephen P. Macmillan and return when a new Insider Trading filing appears.

This tracks SEC filing changes for this page using existing product update flows.

Sign up to follow filing activity

Sponsored

Quick Takeaways

  • Stephen P. Macmillan has 2 issuer positions tracked on this page.
  • Estimated disclosed ownership value: $190,947,402.
  • Recent insider filing activity is available below.

What Changed

  • Largest disclosed position: HOLOGIC INC ($190,419,922).
  • Past-year value change for that position: -$9,266,118.

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.

Official SEC Source

Filed on Form 4

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

See Original Filing

Ownership of Stephen P. Macmillan

Symbol Company Relationship Holdings Value Past Year Net Change Change % Report Period
HOLX HOLOGIC INC Chairman, President and CEO, Director $190,419,922 -$9,266,118 -4.6% 14 Nov 2025
ILMN ILLUMINA, INC. Director $527,480 16 May 2024

Insider Transactions Reported by Stephen P. Macmillan:

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.

Sponsored