Quick Takeaways
- Martin D. Madaus has 5 issuer positions tracked on this page.
- Estimated disclosed ownership value: $4,673,549.
- Recent insider filing activity is available below.
- Info
- Insider Ownership
Insider Trading & Ownership of Martin D. Madaus
- Location
- Marlborough, MA
- Summary
- The estimated net worth of Martin D. Madaus is at least $4,673,549 dollars as of 09 Apr 2026. Martin D. Madaus is the Director of Quanterix Corp and owns shares of Quanterix Corp (QTRX) stock worth about $3.14M. Martin D. Madaus is the Director of REPLIGEN CORP and owns shares of REPLIGEN CORP (RGEN) stock worth about $928.4K. Martin D. Madaus is the Director of STANDARD BIOTOOLS INC. and owns shares of STANDARD BIOTOOLS INC. (LAB) stock worth about $396.8K. Martin D. Madaus is the Director of Azenta, Inc. and owns shares of Azenta, Inc. (AZTA) stock worth about $211.4K.
- Signature
- /s/ Mark W. Irving, attorney-in-fact for Mr. Madaus
- All Insider Reports
- All Insider Reports
Follow Filing Activity
Follow Martin D. Madaus and return when a new Insider Trading filing changes the record on this page.
This uses the existing product follow flow to surface future filing-backed changes without guessing what they mean.
What Changed
- Largest disclosed position: Quanterix Corp ($3,136,981).
- 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
See Original Filing
Insider ownership context is sourced from SEC Forms 3, 4, and 5.
Ownership of Martin D. Madaus
| Symbol | Company | Relationship | Holdings Value | Past Year Net Change | Change % | Report Period |
|---|---|---|---|---|---|---|
| QTRX | Quanterix Corp | Director | $3,136,981 | 02 Jan 2025 | ||
| RGEN | REPLIGEN CORP | Director | $928,432 | +$201,830 | +28% | 08 Aug 2025 |
| LAB | STANDARD BIOTOOLS INC. | Director | $396,763 | 20 Oct 2023 | ||
| AZTA | Azenta, Inc. | Director | $211,373 | 05 Feb 2026 | ||
| HOLX | HOLOGIC INC | Director | $0 | +$300,760 | 07 Apr 2026 |
Insider Transactions Reported by Martin D. Madaus:
| 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.