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Michael Grey

Executive Chairman of the Board at SPRUCE BIOSCIENCES
Board

About Michael Grey

Michael Grey, 72, is Executive Chairman of Spruce Biosciences and has served on the Board since April 2017; he also served as Interim Chief Executive Officer from November 2021 to January 2022 . He holds a B.S. in chemistry from the University of Nottingham and has more than 45 years of operating and board experience in biotech and pharma, including CEO and Chairman roles at multiple companies and senior corporate development roles at Glaxo . He is classified as a non‑independent director under Nasdaq rules due to his executive role; the Board specifically determined Mr. Grey is not independent .

Past Roles

OrganizationRoleTenureCommittees/Impact
Spruce Biosciences, Inc.Executive Chairman; Interim CEOExec Chairman since Apr 2017; Interim CEO Nov 2021–Jan 2022 Chair the Board; oversight of strategy and risk
Mirum Pharmaceuticals, Inc. (public)Chairman; Executive Chairman; CEO; DirectorChairman since Jan 2020; Exec Chair Mar–Dec 2019; CEO May 2018–Mar 2019; Director since May 2018 Led company-building and leadership transitions
Reneo Pharmaceuticals, Inc.Executive Chairman; Chairman & CEOExec Chair Dec 2017–Oct 2024; Chairman & CEO Sep 2014–Dec 2017 Guided through growth and later merger with OnKure
OnKure, Inc.DirectorSince Oct 2024 Post‑merger board governance
Plexium, Inc.Executive ChairmanSince Sep 2020 Portfolio company leadership
Sorriso Pharmaceuticals, Inc. (private)ChairmanSince May 2021 Company oversight
Theolytics Ltd. (private)Executive ChairSince Nov 2023 Company oversight
BioMarin Pharmaceutical Inc. (public)DirectorDec 2005–May 2021 Long‑tenured public board experience
Mirati Therapeutics, Inc. (public)DirectorNov 2014–Jun 2021 Public board governance
Pappas VenturesVenture PartnerSince Jan 2010 Investment and board work
Curzion Pharmaceuticals, Inc.Director; President & CEODirector Jan 2019–Apr 2020; President & CEO Jan–Sep 2019 Led sale to Horizon in Apr 2020
Horizon Pharma plcDirectorSep 2011–Oct 2023 Public board governance
Amplyx Pharmaceuticals, Inc.President & CEOOct 2015–Jan 2017 Executive leadership
Lumena Pharmaceuticals, Inc.President & CEOFeb 2011–Jun 2014 Led sale to Shire in 2014
SGX Pharmaceuticals, Inc.President & CEOPrior role; company sold to Eli Lilly in 2008 Led strategic exit
Trega Biosciences, Inc.President & CEOPrior role; company sold to LION Bioscience in 2001 Led strategic exit
BioChem Therapeutic Inc.PresidentPrior senior role Operations leadership
Glaxo, Inc.; Glaxo Holdings PLCVP Corporate Development; Director of International LicensingPrior senior roles Corporate development, licensing

External Roles

CompanyRolePublic/PrivateStart Date
Mirum Pharmaceuticals, Inc.Chairman; DirectorPublicChairman since Jan 2020; Director since May 2018
OnKure, Inc.DirectorPrivateOct 2024
Plexium, Inc.Executive ChairmanPrivateSep 2020
Sorriso Pharmaceuticals, Inc.ChairmanPrivateMay 2021
Theolytics Ltd.Executive ChairPrivateNov 2023

Board Governance

  • Independence: Not independent (Board determined all directors except Szwarcberg, Ways, and Grey are non‑independent) .
  • Role: Chair of the Board; sets agendas, presides over meetings, coordinates with CEO on information flow .
  • Committees: Not listed as a member of Audit, Compensation, or Nominating in 2024 .
  • Attendance: Board met 11 times in 2024; all directors except Dr. Muralidhar attended at least 75% of board and committee meetings (implies Mr. Grey met the threshold) .
  • Executive sessions: Non‑employee directors held 4 executive sessions in 2024 .

Fixed Compensation

ComponentAmount (2024)Notes
Cash fees$70,000 Comprised of $40,000 annual retainer plus $30,000 Executive Chairman retainer per policy
Committee fees$0 Not a member or chair of any committee in 2024 ; policy specifies committee member and chair retainers
Other cash$0 No other cash disclosed

Performance Compensation

Award TypeGrant Practice2024 Grant ValueVestingPerformance Metrics
Stock optionsAnnual grant of 30,000 options at each annual meeting; initial grant of 60,000 at appointment $19,224 aggregate grant date fair value in 2024 Annual grants vest on earlier of 1-year anniversary or next annual meeting; options vest in full upon change of control None disclosed for directors; options are time‑based per policy

Other Directorships & Interlocks

EntityTypeRolePotential Interlock/Context
BioMarin Pharmaceutical Inc.PublicDirector (2005–2021) Spruce CEO Szwarcberg previously a BioMarin executive, indicating network ties but not a current interlock
Horizon Pharma plcPublicDirector (2011–2023) Grey also led Curzion sale to Horizon; transaction history noted
Mirum Pharmaceuticals, Inc.PublicChairman; Director No disclosed related‑party transactions with Mirum; general related‑party policy in place
2023 Private Placement investorsPublic/PrivateSeveral >5% holders affiliated with board members participated (Novo, Abingworth, Rock Springs, Armistice, RiverVest) No specific transactions identified for Mr. Grey; Audit Committee reviews related‑person transactions

Expertise & Qualifications

  • Operating excellence: CEO/Chairman roles across multiple biopharmas; executed notable exits (Lumena→Shire 2014; SGX→Eli Lilly 2008; Trega→LION 2001) .
  • Finance and corporate development: Former VP Corporate Development and licensing leader at Glaxo; extensive board governance across public companies .
  • Industry depth: 45+ years in pharma/biotech; commercialization, R&D, licensing, and M&A experience .
  • Education: B.S. in chemistry, University of Nottingham .

Equity Ownership

MetricAmountNotes
Total beneficial ownership (shares)439,745 Represents options exercisable within 60 days as of April 1, 2025
Ownership % of outstanding1.0% Based on 42,231,285 shares outstanding at measurement date
Options held (as of 12/31/2024)447,037 options outstanding Director holdings summary table
Vested vs unvested439,745 exercisable within 60 days (vested for beneficial ownership); additional options outstanding not all counted in beneficial ownership
Pledging/HedgingProhibited by company policy (no pledging or hedging allowed)

Governance Assessment

  • Positives

    • Deep operating and board experience; relevant expertise for a small‑cap biotech facing financing and development risk .
    • Separation of Chair and CEO roles enhances oversight; regular executive sessions (4 in 2024) support independent discussion among non‑employee directors .
    • Attendance met the ≥75% threshold in 2024, indicating engagement .
    • Company policies prohibit hedging and pledging; clawback policy implemented per SEC/Dodd‑Frank requirements .
  • Concerns and RED FLAGS

    • Non‑independent Board Chair: Mr. Grey is not independent, which may weaken perceived board checks and balances versus a lead independent director or independent chair model .
    • Overboarding/time‑commitment risk: Simultaneous chair/board roles at several companies (Mirum, Plexium, Sorriso, Theolytics, OnKure) could constrain bandwidth during critical periods for SPRB .
    • Ownership alignment: Beneficial ownership primarily via options; limited disclosed direct share ownership may reduce “skin in the game” perception relative to significant stock holdings .
    • Capital structure and listing risk context: 2025 proxy highlights going‑concern uncertainty, reverse split proposal, and Nasdaq delisting/suspension risks—placing heightened importance on board effectiveness in financing and governance; while not Grey‑specific, this amplifies governance scrutiny of the Chair’s role .
  • Related‑party and consultant oversight

    • 2023 private placement involved several >5% holders affiliated with directors; Audit Committee is responsible for related‑party review; no specific Grey‑related transactions disclosed .
    • Compensation consultant Aon provided director/executive comp advice in 2023; in 2024 an affiliate provided $150,000 insurance brokerage services approved by management—independence safeguards described, but committee did not review those services (potential optics issue) .

Director Compensation Mix and Structure (Context)

ElementPolicy/PracticeGrey 2024 Actual
Cash retainer$40,000 annual cash retainer for all non‑employee directors Included in $70,000 cash total
Executive Chair premium+$30,000 additional annual cash retainer for Executive Chairman Included in $70,000 cash total
Committee retainersMembers: Audit $7,500; Comp $5,000; Nominating $4,000. Chairs: Audit $15,000; Comp $10,000; Nominating $8,000 $0 (not on committees)
EquityInitial 60,000 options at appointment; annual 30,000 options at each annual meeting; 10‑year term; full vesting at change of control $19,224 option grant fair value in 2024

Independence, Attendance & Engagement Summary

AttributeStatus
IndependenceNot independent (Board determination)
Board attendance≥75% in 2024 (all except Dr. Muralidhar met threshold)
Committee participationNone in 2024; not a committee chair/member
Executive sessions4 in 2024 for non‑employee directors
Years on BoardSince April 2017

Notes on Compensation & Incentives

  • No director performance‑based metrics disclosed; options vest on time basis and at change of control; no RSUs/PSUs for directors noted .
  • Company clawback policy implemented per SEC/Dodd‑Frank; insider trading policy bans hedging and pledging, reinforcing alignment and risk controls .

Potential Conflicts or Related‑Party Exposure

  • No Grey‑specific related‑party transactions disclosed since 2023; broader private placement participation involved holders affiliated with other board members and funds; Audit Committee oversees related‑party reviews .
  • Consultant independence: Aon provided independent compensation consulting (2023); an affiliate provided insurance brokerage services in 2024 approved by management, not the Compensation Committee, though safeguards to maintain independence were described .

Summary Implications for Investor Confidence

  • The Chair’s non‑independent status and broad external commitments warrant monitoring, particularly amid going‑concern and financing risks highlighted in the proxy .
  • Positive governance signals include separation of CEO/Chair, executive sessions, attendance, and strong industry credentials, but ownership alignment appears modest (options‑heavy) .
  • No disclosed pledging/hedging and presence of clawback policy are supportive of governance hygiene .