FID · Weight 7 of 100
Fiduciary duty and loyalty
PBM agrees to act as a fiduciary by acting in good faith, with candor and due diligence in connection with the performance of the Contract and any negotiations related thereto.
Why this verdict
All five models reached this verdict. Section 2.3 has Express Scripts agree to act as a fiduciary in good faith with candor and due diligence, and section 5.4(b) on page 7 adds a warranty of utmost good faith, loyalty, candor and skill. That is an express fiduciary undertaking, which is rare in pharmacy benefit contracts, but the duty is framed around performance of the contract rather than loyalty owed solely to the plan and its members. There is no duty to disclose every form of direct and indirect compensation and no disgorgement remedy for value retained in breach, so the clause is weaker than the model contract published by Mark Cuban and collaborators.
Compare with the model contract · § Section 2.4
The PBM owes duties of loyalty and care solely to the plan and its members, must disclose all direct and indirect compensation and every economic conflict, and must disgorge anything retained in breach without the plan proving damages.
Without a loyalty duty the PBM is free to put its own affiliates and revenue ahead of the plan when it exercises discretion over formularies, networks and pricing.
Independent council readings 5 published readings
Only readings under the score’s rubric version are shown here. Model confidence and agreement do not establish legal correctness.
The agreement contains an express fiduciary undertaking, which is unusual for a pharmacy benefit manager, and section 5.4(b) on page 7 adds duties of utmost good faith, loyalty, candor and skill. The duty is framed around good faith performance of the contract rather than loyalty owed solely to the plan and its members. There is no requirement to disclose every form of direct and indirect compensation as part of that duty and no disgorgement remedy for value retained in breach. The model contract published by Mark Cuban and collaborators ties the fiduciary standard to sole loyalty and to giving back retained amounts, so this falls short of that standard.
PBM agrees to act as a fiduciary by acting in good faith, with candor and due diligence in connection with the performance of the Contract and any negotiations related thereto.Page 2 · Rubric v2
The agreement states that the PBM will act as a fiduciary and perform its duties with good faith and loyalty. However, it does not mandate that these duties are owed solely to the plan and its members, nor does it include a provision for disgorgement of retained amounts.
PBM warrants and represents that it shall perform its obligations and duties under this Contract with utmost good faith, loyalty, candor and skill.Page 7 · Rubric v2
The agreement expressly makes the PBM a fiduciary and separately requires loyalty, candor, skill, and good faith. It does not state that duties run solely to the plan and members, require disclosure of all direct and indirect compensation, or expressly provide disgorgement and participant enforcement.
PBM agrees to act as a fiduciary by acting in good faith, with candor and due diligence in connection with the performance of the Contract and any negotiations related thereto.Page 2 · Rubric v2
Express Scripts agrees to act as a fiduciary, and later warrants utmost good faith, loyalty, candor and skill. That is more than silence, but it is not the duty of loyalty and care owed solely to the plan and members in the model contract published by Mark Cuban and collaborators. There is no duty to disclose every economic conflict or to disgorge amounts retained in breach without ERS proving damages.
PBM agrees to act as a fiduciary by acting in good faith, with candor and due diligence in connection with the performance of the Contract and any negotiations related thereto.Page 2 · Rubric v2
The contract does use the word fiduciary, and Section 5.4(b) adds that the PBM will perform with utmost good faith, loyalty, candor and skill. But the model contract published by Mark Cuban and collaborators requires duties of loyalty and care owed solely to the plan and its members, disclosure of all direct and indirect compensation and conflicts, and disgorgement of anything retained in breach without the plan proving damages. None of those mechanics appear. What ERS got is a general good faith standard, not an enforceable loyalty duty with teeth.
PBM agrees to act as a fiduciary by acting in good faith, with candor and due diligence in connection with the performance of the Contract and any negotiations related thereto.Page 2 · Rubric v2
Finding provenance
- Finding ID
- 6cc981df-1611-4bf3-bc38-81fd2b3548bd
- Reviewed
- Sep 30, 2026
- Reviewer
- owner
- Recorded confidence
- 0.95
- Model votes
- Kimi K3: partial; Grok 4.6: partial; GPT 5.6 Sol: partial; Claude Opus 5: partial; Gemini 3.1 Pro: partial