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William Donnelly

Chair of the Board at Quanterix
Board

About William P. Donnelly

Independent director since August 2023; appointed Chair of the Board in March 2025. Age 64 (as of 2025). Former CFO and later EVP (finance, IR, supply chain, IT) at Mettler-Toledo; earlier CFO roles at Elsag Bailey and auditor at PwC; B.S. in Business Administration from John Carroll University. Designated an Audit Committee Financial Expert; independence affirmed by Nasdaq standards in 2024 and 2025 .

Past Roles

OrganizationRoleTenureCommittees/Impact
Mettler-Toledo International Inc.EVP (finance, IR, supply chain, IT); CFO; Division Head (Product Inspection, certain lab businesses)EVP 2014–2018; CFO 1997–2002 and 2004–2014; Division Head 2002–2004Led finance and operations transformation; multi-functional oversight
Elsag Bailey Process Automation, NVSenior financial roles incl. CFO1993–1997Corporate finance leadership
PricewaterhouseCoopers LLPAuditor1983–1993Audit practice experience

External Roles

OrganizationRoleStartNotes
Ingersoll Rand Inc. (NYSE: IR)Director; Lead Independent DirectorDirector May 2017; Lead Director Nov 2021Board leadership at diversified industrial
T. Rowe Price Group, Inc. (Nasdaq: TROW)Director2023Global asset manager board experience

Board Governance

  • Board leadership: Chair of the Board (independent) since March 2025 .
  • Independence: Board determined Donnelly is independent (Nasdaq) in 2024 and 2025 .
  • Attendance: No director attended fewer than 75% of Board/committee meetings in 2023; all incumbents ≥75% in 2024 .
  • Committees: Audit (member; financial expert) and Compensation (member). 2024: Audit Committee; 2025: Audit and Compensation Committees .
Governance Item202320242025
Board roleDirector (joined Aug 17, 2023) Director Chair of the Board
Audit CommitteeMember; Financial ExpertMember; Financial ExpertMember; Financial Expert
Audit Committee compositionMeister (Chair), Donnelly, Hlavinka, Madaus Same Elliott (Chair), Donnelly, Meister
Compensation CommitteeNot listed Member (Flynn Chair; Donnelly; Magovčević-Liebisch; Walt)
Nominating & GovernanceNot listed Not listed
IndependenceIndependent Independent Independent
Meeting attendance≥75% threshold metAll incumbents ≥75%All incumbents ≥75%

Fixed Compensation

  • Non-employee director compensation policy includes: annual retainer; committee fees; and annual equity grants (60% options, 40% RSUs). Directors may elect cash fees in common stock .
  • Policy changes: Chair retainer increased to $80,000 effective Jan 1, 2024; increased to $95,000 effective Jan 1, 2025 .
Component20232024Notes
Fees earned (cash or stock election)$18,579 $51,269 Donnelly elected to receive fees in stock (2023; also noted for 2024 group)
Stock awards (RSUs)$196,888 $120,000 Annual director grant (part of $200k equity)
Option awards$203,113 $80,000 Annual director grant (remaining of $200k equity)
Total director compensation$418,580 $251,269 2023 includes $400k initial award upon appointment
Fee Policy Elements2023 Policy2024 Policy2025 Policy
Annual retainer (Director)$40,000 $40,000 $50,000
Annual retainer (Chair/Lead)$60,000 $80,000 $95,000
Committee fees (Audit)$10,000 member; $20,000 chair Same Same
Committee fees (Comp)$7,250 member; $15,000 chair $7,500 member; $15,000 chair Same
Committee fees (Nominating)$5,000 member; $10,000 chair Same Same
Annual equity grant$200,000 (60% options/40% RSUs) Same Same
Initial new director grant$400,000 (60% options/40% RSUs) Same Same
Equity vestingAnnual grants vest Dec 31 of grant year; initial grants vest 1/3 annually over 3 years; options 1/3 at 1 year then monthly over next 2 yrs Same Same

Performance Compensation

  • Director pay is not tied to performance metrics; equity awards are time-based per policy (no performance vesting) .
Performance Metrics Applied to Director Compensation202320242025
Performance-vesting metrics for directorsNone (time-based equity only) None None

Other Directorships & Interlocks

CompanyRelationship to QTRXPotential Interlock/Conflict
Ingersoll Rand Inc.Independent director; Lead Independent DirectorNo QTRX-disclosed transactions with IR; independence maintained
T. Rowe Price Group, Inc.Independent directorAsset manager; no QTRX-disclosed related transactions
  • QTRX related-party transactions disclosed involve Tufts/Harvard (David Walt) and UltraDx (linked to Keith Crandell); none involve Donnelly .

Expertise & Qualifications

  • Financial strategy and capital markets expertise; extensive CFO experience; designated Audit Committee Financial Expert .
  • Governance credentials: current Board Chair; prior lead independent director role at IR; broad public company board experience .

Equity Ownership

As-of DateShares Beneficially Owned% Outstanding
March 1, 202420,888<1%
July 31, 2025148,050<1%
  • Ownership guidelines: Non-employee directors must hold 5x annual base cash retainer; attainment period five years; all applicable individuals were in compliance as of Oct 9, 2024 .
  • Anti-hedging/anti-pledging: Company policy prohibits hedging and pledging by directors/officers .

Insider Trades (Form 4)

  • Pattern: Regular small stock awards consistent with fee elections; significant open market purchases in 2023 and 2025 increase alignment [ReadFile insider JSON entries; see URLs above].

Governance Assessment

  • Strengths
    • Independent Chair; dual committee roles (Audit; Compensation) enhance oversight; designated Audit Committee financial expert .
    • High engagement/attendance; independence affirmed .
    • Strong ownership alignment: elected to receive fees in stock; large open-market buys; compliance with stock ownership guidelines; anti-hedging/anti-pledging policy .
    • Governance enhancements in 2025: majority voting for uncontested elections; Board declassification proposal via cooperation agreement .
  • Risks/RED FLAGS
    • Financial restatement in 2024 related to inventory capitalization; Audit Committee (including Donnelly) oversaw remediation; clawback policy concluded no recovery required for 2023, but restatement remains a governance risk .
    • Multiple external boards (IR; TROW) may constrain time, though attendance meets thresholds .
  • Overall: Donnelly’s financial expertise and chair role are positives for board effectiveness. Insider buying and stock fee elections signal alignment. Continued monitoring of internal control remediation and financial reporting quality is warranted .