William Blair Investment Management
CPRX

William Blair Investment Management’s Catalyst Pharmaceutical CPRX Stock Holding History

William Blair Investment Management’s Portfolio CPRX Stock Details CPRX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$11.7M Sell
371,530
-107,511
-22% -$3.17M 0.04% 300
2026
Q1 		$11.9M Buy
+479,041
New +$11.4M 0.04% 306

Other funds holding CPRX

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
GCL
Glazer Capital LLC New York $4.07B AUM 78.71% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
HI
HBK Investments Dallas, Texas $10.2B AUM 67.73% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

William Blair Investment Management's CPRX Position: Q2 2026 in Review

William Blair Investment Management reduced its Catalyst Pharmaceutical (CPRX) stake by 22% in Q2 2026, selling an estimated $3.17M and leaving 371,530 shares worth $11.7M. The position accounts for 0.04% of the portfolio, ranked #300.

William Blair Investment Management first reported a position in CPRX in Q1 2026 and has held it in 2 quarters since. The position peaked at $11.9M in Q1 2026. 396 funds tracked by Wall St. Rank hold CPRX as of Q2 2026.

  • William Blair Investment Management held 371,530 shares of Catalyst Pharmaceutical worth $11.7M as of Q2 2026.
  • William Blair Investment Management sold 107,511 Catalyst Pharmaceutical shares in Q2 2026, an estimated $3.17M.
  • Catalyst Pharmaceutical made up 0.04% of William Blair Investment Management's portfolio in Q2 2026, its #300 holding.
  • William Blair Investment Management first reported a position in Catalyst Pharmaceutical in Q1 2026 and has held it in 2 quarters since.
  • William Blair Investment Management's Catalyst Pharmaceutical position peaked at $11.9M in Q1 2026.
  • 396 funds tracked by Wall St. Rank held Catalyst Pharmaceutical as of Q2 2026.

Based on William Blair Investment Management's 13F filing for Q2 2026, filed 12 Aug 2026.