Reviewing CMC documentation

CMC is the one risk a sponsor controls, yet it is often reviewed only after a setback. Z2 provides independent scientific and technical assessment of cell line, upstream and associated CMC strategies – supporting development programmes, regulatory readiness, investment decisions and technology evaluation.

74%

of FDA rejection letters issued 2020–2024 cited quality or manufacturing (CMC) deficiencies1

65%

of rejection letters for later-approved drugs cited manufacturing-facility problems2

1.3 years

median delay from rejection letter to eventual approval2

CMC planning & regulatory review

  • A CMC plan, budget and risk register set up front
  • Independent review of CLD and upstream programmes: rationale, data maturity, process understanding and scalability
  • Review and contribution to IND/BLA documentation and supporting technical content
  • Experience with regulatory submissions and agency interactions including FDA and MHRA
  • Documentation review for scientific consistency, traceability and regulatory readiness

Technical due diligence

Independent, evidence-based assessment for biotechnology companies, investors, funders and strategic partners – evaluating technology maturity, proof-of-concept evidence, development strategy, scalability, CMC readiness, technical risks and key development gaps to support investment, partnership, acquisition or programme-progression decisions.

  • Technology maturity: is the science real, and how far has it been taken?
  • Scalability: does the process survive manufacturing scale?
  • Development risk: capability gaps and unproven assumptions
  • CMC readiness, including CDMO location under the BIOSECURE Act

Where rushed timelines break

Diligence reads CMC summaries, not raw data.

Where Z2 helps

A data-room review of clone, process and CDMO, with a red-flag report.

Investment, grant & fundraising readiness

Strong proof-of-concept data can sit alongside a process that cannot scale – a mismatch that is usually invisible to non-technical funders. UK biotech venture deals fell from 111 in 2024 to 58 in 2025, so every proposition has to stand up to scrutiny.3

−48%

fall in UK biotech venture deals in 2025 (111 → 58)3

£1.8B

UK biotech VC in 2025, down 13.2% from £2.1B in 2024 (£1.3B in 2023)3

£2.6B

UK biotech VC in H1 2026 alone, led by Isomorphic Labs4

30%

of European biotech venture capital went to UK companies in 20253

  • Assess: technology maturity, bioprocess strategy, scalability, evidence quality and technical risk
  • Articulate: scientific input to grant applications, funding proposals, investor presentations and technical narratives
  • Assure: independent CMC-focused due diligence for investors and partners

Where rushed timelines break

Budgets with no line for technology transfer or rework.5

Where Z2 helps

A CMC plan, budget and risk register that reviewers can check line by line.

Sources

  1. Pharmaceutical Technology. CMC and analytical gaps in CRLs: why they persist despite FDA guidance, July 2026.
  2. Deficiencies Delaying Prescription Drug Approvals by the US FDA, 2020–2024: cross-sectional analysis of 43 novel therapeutics with CRLs. PubMed 41670800, 2026.
  3. BioIndustry Association. UK biotech financing 2025, Jan 2026.
  4. BIA / Biotech Finance. UK biotech financing Q2 2026.
  5. BioPharm International. Current challenges with cell culture scale-up for biologics production.
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Whether you are designing a CLD programme, stuck on an upstream process, preparing for technology transfer, or assessing a biologics asset before you commit.