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Mid Cap Biotechnology
Stocks Ranked by
Market Capitalization

Mid Cap Biotechnology Stocks at a Glance

Biotechnology companies research and develop novel drugs and therapies, often with no products yet on the market. Clinical-trial readouts and regulatory decisions drive binary stock moves, making pipeline breadth, cash runway, and partnership deals the key variables.

There are 76 mid cap Biotechnology stocks — companies in the Biotechnology industry with a market cap between $2B and $10B — worth a combined $357B.

The largest by market cap are Vaxcyte (PCVX) at $9.6B, Twist Bioscience (TWST) at $9.3B and TG Therapeutics (TGTX) at $9.3B.

Among institutional investors, Definium Therapeutics (DFTX) drew the most net new fund positions in Q2 2026: 149 funds opened new positions, taking total fund holders up 114 (46%) quarter-over-quarter.

  • Combined market cap: $357B across 76 stocks.
  • Mid Cap: market cap between $2B and $10B.
  • Largest constituent: Vaxcyte (PCVX), $9.6B market cap.
  • Most net new fund positions in Q2 2026: Definium Therapeutics (DFTX), +114 holders.

Market caps and prices updated daily; fund activity based on aggregated SEC 13F filings for Q2 2026.