Marshall Wace’s Pro-Dex PDEX Stock Holding History

Marshall Wace’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 Q2	$302K	Buy	+5,156	New	+$300K	﹤0.01%	2717
2025 Q1	–	Sell	-9,260	Closed	-$433K	–	2978
2024 Q4	$433K	Buy	+9,260	New	+$377K	﹤0.01%	2094
2019 Q4	–	Sell	-7,689	Closed	-$118K	–	1979
2019 Q3	$118K	Sell	7,689 -17,556	-70%	-$249K	﹤0.01%	1375
2019 Q2	$328K	Buy	+25,245	New	+$352K	﹤0.01%	1168

Other funds holding PDEX

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

PAIM

Punch & Associates Investment Management Edina, Minnesota $2.02B AUM 40.6% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

PHS

Pekin Hardy Strauss Chicago, Illinois $1.14B AUM 37.36% 1-Year Est. Return

BNP Paribas Financial Markets Paris, France $289B AUM 60.46% 1-Year Est. Return

Marshall Wace's PDEX Position: Q2 2026 in Review

Marshall Wace opened a new position in Pro-Dex (PDEX) in Q2 2026: 5,156 shares worth $302K. The stake represents ﹤0.01% of the portfolio and ranks #2717 among its holdings. This is a return to the name: Marshall Wace previously reported a position in PDEX as recently as Q4 2024.

Marshall Wace first reported a position in PDEX in Q2 2019 and has held it in 4 quarters since. The position peaked at $433K in Q4 2024. 66 funds tracked by Wall St. Rank hold PDEX as of Q2 2026.

Marshall Wace held 5,156 shares of Pro-Dex worth $302K as of Q2 2026.
Pro-Dex was a new Marshall Wace position in Q2 2026.
Pro-Dex made up ﹤0.01% of Marshall Wace's portfolio in Q2 2026, its #2717 holding.
Marshall Wace first reported a position in Pro-Dex in Q2 2019 and has held it in 4 quarters since.
Marshall Wace's Pro-Dex position peaked at $433K in Q4 2024.
66 funds tracked by Wall St. Rank held Pro-Dex as of Q2 2026.

Based on Marshall Wace's 13F filing for Q2 2026, filed 13 Aug 2026.