Ken Griffin
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Ken Griffin’s Pro-Dex PDEX Stock Holding History

Ken Griffin’s Portfolio PDEX Stock Details PDEX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$441K Buy
+8,986
New +$387K ﹤0.01% 9592
2025
Q3 		– Sell
-11,481
Closed -$501K – 13760
2025
Q2 		$501K Buy
11,481
+2,831
+33% +$139K ﹤0.01% 8623
2025
Q1 		$429K Buy
+8,650
New +$361K ﹤0.01% 8819

Other funds holding PDEX

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
PAIM
Punch & Associates Investment Management Edina, Minnesota $1.73B AUM 27.65% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Northern Trust
Northern Trust Chicago, Illinois $757B AUM 28.64% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
QC
Quadrature Capital London, United Kingdom $11.7B AUM 87.29% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Ken Griffin's PDEX Position: Q1 2026 in Review

Ken Griffin opened a new position in Pro-Dex (PDEX) in Q1 2026: 8,986 shares worth $441K. The stake represents ﹤0.01% of the portfolio and ranks #9592 among its holdings. This is a return to the name: Ken Griffin previously reported a position in PDEX as recently as Q2 2025.

Ken Griffin first reported a position in PDEX in Q1 2025 and has held it in 3 quarters since. The position peaked at $501K in Q2 2025. 58 funds tracked by Wall St. Rank hold PDEX as of Q1 2026.

  • Ken Griffin held 8,986 shares of Pro-Dex worth $441K as of Q1 2026.
  • Pro-Dex was a new Ken Griffin position in Q1 2026.
  • Pro-Dex made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #9592 holding.
  • Ken Griffin first reported a position in Pro-Dex in Q1 2025 and has held it in 3 quarters since.
  • Ken Griffin's Pro-Dex position peaked at $501K in Q2 2025.
  • 58 funds tracked by Wall St. Rank held Pro-Dex as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.