Save your place

Sign in to WhoBought

Please try again later.

Jim Simons's Pro-Dex, Inc. (PDEX) position

Not anymore: Jim Simons fully exited PDEX in Q3 2025. The position peaked at an amount we cannot price in Q1 2021.
View full portfolio →
Value at exit
an amount we cannot price
Shares at exit
11K
Quarter-end price
No quarter-end price available

Average buy price is hidden here because at least one covered purchase quarter has no usable local mean price.

PDEX price vs Simons's position

Dates
$54$56$58← Earlier —7 purchases, 4 sells
Average closing price · filing quarter
Price range · filing quarter

Every quarterly change

Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Q3 2025 Exited −11K −100.0% 0 Nov 13, 2025
Q2 2025 Reduced −4K −26.2% 11K Aug 13, 2025
Q1 2025 Added +500 +3.4% 15K May 14, 2025
Q4 2024 Added +1K +8.1% 15K Feb 13, 2025
Q3 2024 Added +1K +11.4% 14K Nov 13, 2024
Q2 2024 Added +900 +7.9% 12K Aug 9, 2024
Q1 2024 Added +1K +9.7% 11K May 13, 2024
Q4 2023 New +10K 10K Feb 13, 2024
Q2 2022 New +11K 11K Aug 12, 2022
Q4 2021 Reduced −500 −5.5% 9K Feb 11, 2022
Q3 2021 Reduced −3K −25.9% 9K Nov 12, 2021
Q2 2021 Reduced −4K −23.2% 12K Aug 13, 2021
Q1 2021 First covered 16K May 13, 2021
Data through Q3 2025 · filed Nov 13, 2025
13 grouped rows from 13 quarters

More Simons positions

Common questions

Does Jim Simons own PDEX?

Not currently. Jim Simons fully exited PDEX in Q3 2025, and the complete history is above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Jim Simons buy PDEX?

Jim Simons held PDEX since at least Q1 2021, when this filing coverage begins; the opening snapshot is not a disclosed purchase. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

Did Jim Simons sell PDEX?

Yes. Jim Simons reduced and then fully exited PDEX by Q3 2025; the reductions are in the table above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How many shares of PDEX does Jim Simons own?

None as of the latest filing: Jim Simons has exited PDEX. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

What price did Jim Simons pay for PDEX?

Jim Simons began building the PDEX position before our 13F history starts, so an exact average buy price cannot be estimated without understating it. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How are the estimated trade prices calculated?

13F filings disclose quarter-end holdings, not trade dates or execution prices. These estimates use each covered quarter's average market price; the add average excludes the opening position and quarters without price data. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.