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Perimeter Solutions Stock Up 111% but One Fund Trimmed Its $35 Million Stake

After a monster year for the stock, this move looks less like doubt and more like a textbook decision about concentration risk, timing, and discipline.

By Jonathan Ponciano Updated Dec 26, 2025 at 6:01PM EST

Key Points

  • Massachusetts-based East Coast Asset Management sold 497,847 shares of Perimeter Solutions in the third quarter.
  • The position value fell by $6.40 million from the previous period.
  • As of September 30, the fund reported holding nearly 1.6 million shares of Perimeter Solutions valued at $35.24 million.

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