Van Kirk Richard Lee Jr

SEC source: 0001079973-26-001259 · ownership.xml · nonDerivative · entry 2

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 79,228

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 28, 2026.

F3 · price: The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $59.39 to $59.91, inclusive. The reporting person undertakes to provide Pro-Dex, Inc., any security holder of Pro-Dex, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (3) to this Form.

SEC source: 0001079973-26-001259 · ownership.xml · nonDerivative · entry 1

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 79,703

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 28, 2026.

F2 · price: The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $58.36 to $59.35, inclusive. The reporting person undertakes to provide Pro-Dex, Inc., any security holder of Pro-Dex, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (2) to this Form.

SEC source: 0001079973-26-001244 · ownership.xml · nonDerivative · entry 9

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 79,993

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 28, 2026.

F10 · price: The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $59.10 to $60.02, inclusive. The reporting person undertakes to provide Pro-Dex, Inc., any security holder of Pro-Dex, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (10) to this Form.

SEC source: 0001079973-26-001244 · ownership.xml · nonDerivative · entry 8

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 84,761

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 28, 2026.

F9 · price: The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $58.04 to $59.00, inclusive. The reporting person undertakes to provide Pro-Dex, Inc., any security holder of Pro-Dex, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (9) to this Form.

SEC source: 0001079973-26-001244 · ownership.xml · nonDerivative · entry 7

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 85,567

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 28, 2026.

F8 · price: The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $64.70 to $64.71, inclusive. The reporting person undertakes to provide Pro-Dex, Inc., any security holder of Pro-Dex, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (8) to this Form.

SEC source: 0001079973-26-001244 · ownership.xml · nonDerivative · entry 6

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 85,867

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 28, 2026.

F7 · price: The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $63.65 to $64.46, inclusive. The reporting person undertakes to provide Pro-Dex, Inc., any security holder of Pro-Dex, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (7) to this Form.

SEC source: 0001079973-26-001244 · ownership.xml · nonDerivative · entry 5

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 88,011

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 28, 2026.

F6 · price: The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $62.61 to $63.60, inclusive. The reporting person undertakes to provide Pro-Dex, Inc., any security holder of Pro-Dex, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (6) to this Form.

SEC source: 0001079973-26-001244 · ownership.xml · nonDerivative · entry 4

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 88,946

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 28, 2026.

F5 · price: The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $61.49 to $62.36, inclusive. The reporting person undertakes to provide Pro-Dex, Inc., any security holder of Pro-Dex, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (5) to this Form.

SEC source: 0001079973-26-001244 · ownership.xml · nonDerivative · entry 3

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 90,103

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 28, 2026.

F4 · price: The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $60.38 to $61.24, inclusive. The reporting person undertakes to provide Pro-Dex, Inc., any security holder of Pro-Dex, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (4) to this Form.

SEC source: 0001079973-26-001244 · ownership.xml · nonDerivative · entry 2

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 94,377

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 28, 2026.

F3 · price: The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $59.38 to $60.24, inclusive. The reporting person undertakes to provide Pro-Dex, Inc., any security holder of Pro-Dex, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (3) to this Form.

SEC source: 0001079973-26-001244 · ownership.xml · nonDerivative · entry 1

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 97,068

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 28, 2026.

F2 · price: The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $58.36 to $59.33, inclusive. The reporting person undertakes to provide Pro-Dex, Inc., any security holder of Pro-Dex, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (2) to this Form.

SEC source: 0001079973-26-000908 · ownership.xml · nonDerivative · entry 2

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 99,228

F2 · kind: Represents shares withheld to satisfy tax withholding obligations of the reporting person.

SEC source: 0001079973-26-000908 · ownership.xml · nonDerivative · entry 1

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 104,507

F1 · kind: Represents shares issued under a performance award agreement previously granted to the reporting person, pursuant to the Pro-Dex, Inc. 2016 Equity Incentive Plan.

SEC source: 0001079973-26-000736 · ownership.xml · nonDerivative · entry 6

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 89,707

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 19, 2026.

F7 · price: The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $63.56 to $63.68, inclusive. The reporting person undertakes to provide Pro-Dex, Inc., any security holder of Pro-Dex, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (7) to this Form.

SEC source: 0001079973-26-000736 · ownership.xml · nonDerivative · entry 5

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 89,757

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 19, 2026.

F6 · price: The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $62.55 to $63.54, inclusive. The reporting person undertakes to provide Pro-Dex, Inc., any security holder of Pro-Dex, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (6) to this Form.

SEC source: 0001079973-26-000736 · ownership.xml · nonDerivative · entry 4

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 91,011

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 19, 2026.

F5 · price: The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $61.54 to $62.52, inclusive. The reporting person undertakes to provide Pro-Dex, Inc., any security holder of Pro-Dex, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (5) to this Form.

SEC source: 0001079973-26-000736 · ownership.xml · nonDerivative · entry 3

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 93,835

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 19, 2026.

F4 · price: The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $63.56 to $64.33, inclusive. The reporting person undertakes to provide Pro-Dex, Inc., any security holder of Pro-Dex, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (4) to this Form.

SEC source: 0001079973-26-000736 · ownership.xml · nonDerivative · entry 2

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 94,385

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 19, 2026.

F3 · price: The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $62.54 to $63.53, inclusive. The reporting person undertakes to provide Pro-Dex, Inc., any security holder of Pro-Dex, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (3) to this Form.

SEC source: 0001079973-26-000736 · ownership.xml · nonDerivative · entry 1

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 97,789

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 19, 2026.

F2 · price: The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $61.55 to $62.53, inclusive. The reporting person undertakes to provide Pro-Dex, Inc., any security holder of Pro-Dex, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (2) to this Form.

SEC source: 0001553350-25-000134 · ownership.xml · nonDerivative · entry 1

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 99,707

F1 · kind: These shares were forfeited to pay payroll taxes related to the vesting of 200 restricted shares granted on 11/20/24 under the Issuer's 2016 Equity Incentive Plan.

SEC source: 0001104659-25-097549 · tm2526989-16_4seq1.xml · derivative · entry 1

Van Kirk Richard Lee Jr · CIK 0001575056 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,000 shares

Expires not disclosed

F1 · derivative.exercise_price: In connection with the terms of an Agreement and Plan of Merger, dated July 11, 2025 (the "Original Merger Agreement"), by and among the Issuer, Zimmer Biomet Holdings, Inc., ("Zimmer Biomet"), and Honey Badger Merger Sub, Inc., a wholly owned subsidiary of Zimmer Biomet ("Merger Sub"), as amended by that certain First Amendment to Agreement and Plan of Merger, dated August 27, 2025, by and between the Issuer and Zimmer Biomet (together with the Original Merger Agreement, the "Merger Agreement"), Merger Sub merged with and into the Issuer, with the Issuer continuing as the surviving corporation and a wholly owned subsidiary of Zimmer Biomet upon consummation of the merger (the "Effective Time").

F2 · derivative.exercise_price: At the Effective Time, each outstanding and unexercised option, whether or not vested, was cancelled and converted into the right to receive, (i) a cash payment equal to the excess of (A) $4.04 (the "Cash Amount") over (B) the exercise price per share of such option, and (ii) one contractual contingent value right issued pursuant to and in accordance with the CVR agreement ("CVR"). However, any such option (1) with a per share exercise price that is equal to or greater than the Cash Amount but less than the sum of the Cash Amount and the maximum CVR consideration payable pursuant to the CVR agreement (that is, $16.41) was cancelled and converted into the right to receive, for each share of common stock underlying such option, one CVR issued pursuant to and in accordance with the CVR agreement less the Cash Amount and (2) with a per share exercise price greater than $16.41 was cancelled for no consideration.

F1 · price: In connection with the terms of an Agreement and Plan of Merger, dated July 11, 2025 (the "Original Merger Agreement"), by and among the Issuer, Zimmer Biomet Holdings, Inc., ("Zimmer Biomet"), and Honey Badger Merger Sub, Inc., a wholly owned subsidiary of Zimmer Biomet ("Merger Sub"), as amended by that certain First Amendment to Agreement and Plan of Merger, dated August 27, 2025, by and between the Issuer and Zimmer Biomet (together with the Original Merger Agreement, the "Merger Agreement"), Merger Sub merged with and into the Issuer, with the Issuer continuing as the surviving corporation and a wholly owned subsidiary of Zimmer Biomet upon consummation of the merger (the "Effective Time").

F2 · price: At the Effective Time, each outstanding and unexercised option, whether or not vested, was cancelled and converted into the right to receive, (i) a cash payment equal to the excess of (A) $4.04 (the "Cash Amount") over (B) the exercise price per share of such option, and (ii) one contractual contingent value right issued pursuant to and in accordance with the CVR agreement ("CVR"). However, any such option (1) with a per share exercise price that is equal to or greater than the Cash Amount but less than the sum of the Cash Amount and the maximum CVR consideration payable pursuant to the CVR agreement (that is, $16.41) was cancelled and converted into the right to receive, for each share of common stock underlying such option, one CVR issued pursuant to and in accordance with the CVR agreement less the Cash Amount and (2) with a per share exercise price greater than $16.41 was cancelled for no consideration.

F1 · derivative.exercise_date: In connection with the terms of an Agreement and Plan of Merger, dated July 11, 2025 (the "Original Merger Agreement"), by and among the Issuer, Zimmer Biomet Holdings, Inc., ("Zimmer Biomet"), and Honey Badger Merger Sub, Inc., a wholly owned subsidiary of Zimmer Biomet ("Merger Sub"), as amended by that certain First Amendment to Agreement and Plan of Merger, dated August 27, 2025, by and between the Issuer and Zimmer Biomet (together with the Original Merger Agreement, the "Merger Agreement"), Merger Sub merged with and into the Issuer, with the Issuer continuing as the surviving corporation and a wholly owned subsidiary of Zimmer Biomet upon consummation of the merger (the "Effective Time").

F2 · derivative.exercise_date: At the Effective Time, each outstanding and unexercised option, whether or not vested, was cancelled and converted into the right to receive, (i) a cash payment equal to the excess of (A) $4.04 (the "Cash Amount") over (B) the exercise price per share of such option, and (ii) one contractual contingent value right issued pursuant to and in accordance with the CVR agreement ("CVR"). However, any such option (1) with a per share exercise price that is equal to or greater than the Cash Amount but less than the sum of the Cash Amount and the maximum CVR consideration payable pursuant to the CVR agreement (that is, $16.41) was cancelled and converted into the right to receive, for each share of common stock underlying such option, one CVR issued pursuant to and in accordance with the CVR agreement less the Cash Amount and (2) with a per share exercise price greater than $16.41 was cancelled for no consideration.

F1 · derivative.expiration_date: In connection with the terms of an Agreement and Plan of Merger, dated July 11, 2025 (the "Original Merger Agreement"), by and among the Issuer, Zimmer Biomet Holdings, Inc., ("Zimmer Biomet"), and Honey Badger Merger Sub, Inc., a wholly owned subsidiary of Zimmer Biomet ("Merger Sub"), as amended by that certain First Amendment to Agreement and Plan of Merger, dated August 27, 2025, by and between the Issuer and Zimmer Biomet (together with the Original Merger Agreement, the "Merger Agreement"), Merger Sub merged with and into the Issuer, with the Issuer continuing as the surviving corporation and a wholly owned subsidiary of Zimmer Biomet upon consummation of the merger (the "Effective Time").

F2 · derivative.expiration_date: At the Effective Time, each outstanding and unexercised option, whether or not vested, was cancelled and converted into the right to receive, (i) a cash payment equal to the excess of (A) $4.04 (the "Cash Amount") over (B) the exercise price per share of such option, and (ii) one contractual contingent value right issued pursuant to and in accordance with the CVR agreement ("CVR"). However, any such option (1) with a per share exercise price that is equal to or greater than the Cash Amount but less than the sum of the Cash Amount and the maximum CVR consideration payable pursuant to the CVR agreement (that is, $16.41) was cancelled and converted into the right to receive, for each share of common stock underlying such option, one CVR issued pursuant to and in accordance with the CVR agreement less the Cash Amount and (2) with a per share exercise price greater than $16.41 was cancelled for no consideration.

SEC source: 0001104659-25-095100 · tm2526989-4_4seq1.xml · derivative · entry 1

Van Kirk Richard Lee Jr · CIK 0001575056 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,000

Underlying: Common Stock · 5,000 shares

Expires 2035-01-08

F1 · price: The Company uses the Black-Scholes-Merton ("Black-Scholes") option-pricing model to determine the fair value of stock awards. The Black-Scholes option-pricing model requires the use of highly subjective and complex assumptions, including the estimated fair value and price volatility of the Company's common stock and the expected term of the option.

SEC source: 0001079973-24-001627 · ownership.xml · nonDerivative · entry 1

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 99,779

F1 · kind: Grant of restricted shares under the Issuer's 2016 Equity Incentive Plan.

SEC source: 0001079973-24-001030 · ownership.xml · nonDerivative · entry 2

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 98,779

F2 · kind: Represents shares withheld to satisfy tax withholding obligations of the reporting person.

SEC source: 0001079973-24-001030 · ownership.xml · nonDerivative · entry 1

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 104,016

F1 · kind: Represents shares issued under a performance award agreement previously granted to the reporting person, pursuant to the Pro-Dex, Inc. 2016 Equity Incentive Plan.

SEC source: 0001079973-23-001088 · ownership.xml · nonDerivative · entry 2

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 89,216

F1 · kind: These purchases were made pursuant to an Employee Stock Purchase Plan in exempt transactions pursuant to Rule 16b-3(c) and Rule 16b-3(d).

SEC source: 0001079973-23-001088 · ownership.xml · nonDerivative · entry 1

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 88,723

F1 · kind: These purchases were made pursuant to an Employee Stock Purchase Plan in exempt transactions pursuant to Rule 16b-3(c) and Rule 16b-3(d).

SEC source: 0001553350-22-000736 · ownership.xml · derivative · entry 2

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 5,000 shares

Expires 2022-09-11

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001553350-22-000736 · ownership.xml · nonDerivative · entry 1

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 88,196

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001553350-22-000649 · ownership.xml · nonDerivative · entry 3

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 83,196

F3 · kind: These purchases were made pursuant to an Employee Stock Purchase Plan in exempt transactions pursuant to Rule 16b-3(c) and Rule 16b-3(d).

SEC source: 0001553350-22-000649 · ownership.xml · nonDerivative · entry 2

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 82,619

F2 · kind: Represents shares withheld to satisfy tax withholding obligations of the reporting person.

SEC source: 0001553350-22-000649 · ownership.xml · nonDerivative · entry 1

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 87,713

F1 · kind: Represents shares issued under a performance award agreement granted to the reporting person on December 5, 2017, pursuant to the Pro-Dex, Inc. 2016 Equity Incentive Plan.

SEC source: 0001553350-22-000062 · ownership.xml · nonDerivative · entry 1

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 72,913

F1 · kind: These purchases were made pursuant to an Employee Stock Purchase Plan in exempt transactions pursuant to Rule 16b-3(c) and Rule 16b-3(d).

SEC source: 0001553350-21-000803 · ownership.xml · derivative · entry 3

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 25,000 shares

Expires 2021-09-12

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001553350-21-000803 · ownership.xml · nonDerivative · entry 2

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 72,544

SEC source: 0001553350-21-000803 · ownership.xml · nonDerivative · entry 1

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 74,399

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001553350-21-000618 · ownership.xml · nonDerivative · entry 1

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 49,399

F1 · kind: These purchases were made pursuant to an Employee Stock Purchase Plan in exempt transactions pursuant to Rule 16b-3(c) and Rule 16b-3(d).

SEC source: 0001553350-21-000156 · ownership.xml · derivative · entry 1

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 138,000

Underlying: Common Stock · 18,000 shares

Expires 2031-07-01

F1 · security: These options were awarded under Pro-Dex's 2016 Equity Incentive Plan. The percentage of options that may vest and become exercisable, if any, are 100%, 50%, and 25%, respectively, based upon the volume-weighted average price of Pro-Dex's common stock equaling or exceeding the applicable exercise price for the 60 trading days immediately preceding the date the option becomes exercisable, six months from the date the option becomes exercisable, or twelve months from the date the option becomes exercisable, respectively.

SEC source: 0001553350-21-000089 · ownership.xml · nonDerivative · entry 1

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 49,101

F1 · kind: These purchases were made pursuant to an Employee Stock Purchase Plan in exempt transactions pursuant to Rule 16b-3(c) and Rule 16b-3(d).

SEC source: 0001553350-21-000080 · ownership.xml · derivative · entry 5

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 120,000

Underlying: Common Stock · 18,000 shares

Expires 2040-07-01

F1 · security: These options were awarded under Pro-Dex's 2016 Equity Incentive Plan. The percentage of options that may vest and become exercisable, if any, are 100%, 50%, and 25%, respectively, based upon the volume-weighted average price of Pro-Dex's common stock equaling or exceeding the applicable exercise price for the 60 trading days immediately preceding the date the option becomes exercisable, six months from the date the option becomes exercisable, or twelve months from the date the option becomes exercisable, respectively. Explanation of Responses:

SEC source: 0001553350-21-000080 · ownership.xml · derivative · entry 4

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 102,000

Underlying: Common Stock · 18,000 shares

Expires 2038-07-01

F1 · security: These options were awarded under Pro-Dex's 2016 Equity Incentive Plan. The percentage of options that may vest and become exercisable, if any, are 100%, 50%, and 25%, respectively, based upon the volume-weighted average price of Pro-Dex's common stock equaling or exceeding the applicable exercise price for the 60 trading days immediately preceding the date the option becomes exercisable, six months from the date the option becomes exercisable, or twelve months from the date the option becomes exercisable, respectively. Explanation of Responses:

SEC source: 0001553350-21-000080 · ownership.xml · derivative · entry 3

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 84,000

Underlying: Common Stock · 18,000 shares

Expires 2036-07-01

F1 · security: These options were awarded under Pro-Dex's 2016 Equity Incentive Plan. The percentage of options that may vest and become exercisable, if any, are 100%, 50%, and 25%, respectively, based upon the volume-weighted average price of Pro-Dex's common stock equaling or exceeding the applicable exercise price for the 60 trading days immediately preceding the date the option becomes exercisable, six months from the date the option becomes exercisable, or twelve months from the date the option becomes exercisable, respectively. Explanation of Responses:

SEC source: 0001553350-21-000080 · ownership.xml · derivative · entry 2

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 66,000

Underlying: Common Stock · 18,000 shares

Expires 2034-07-01

F1 · security: These options were awarded under Pro-Dex's 2016 Equity Incentive Plan. The percentage of options that may vest and become exercisable, if any, are 100%, 50%, and 25%, respectively, based upon the volume-weighted average price of Pro-Dex's common stock equaling or exceeding the applicable exercise price for the 60 trading days immediately preceding the date the option becomes exercisable, six months from the date the option becomes exercisable, or twelve months from the date the option becomes exercisable, respectively. Explanation of Responses:

SEC source: 0001553350-21-000080 · ownership.xml · derivative · entry 1

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 48,000

Underlying: Common Stock · 18,000 shares

Expires 2032-07-01

F1 · security: These options were awarded under Pro-Dex's 2016 Equity Incentive Plan. The percentage of options that may vest and become exercisable, if any, are 100%, 50%, and 25%, respectively, based upon the volume-weighted average price of Pro-Dex's common stock equaling or exceeding the applicable exercise price for the 60 trading days immediately preceding the date the option becomes exercisable, six months from the date the option becomes exercisable, or twelve months from the date the option becomes exercisable, respectively. Explanation of Responses:

SEC source: 0001214659-20-008075 · marketforms-49747.xml · nonDerivative · entry 2

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 48,910

SEC source: 0001214659-20-008075 · marketforms-49747.xml · nonDerivative · entry 1

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,510

SEC source: 0001553350-20-000855 · vankirk4.xml · derivative · entry 2

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 20,000 shares

Expires 2020-10-07

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001553350-20-000855 · vankirk4.xml · nonDerivative · entry 1

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 59,175

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001553350-20-000684 · vankirk4.xml · nonDerivative · entry 1

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39,175

F1 · kind: These purchases were made pursuant to an Employee Stock Purchase Plan in exempt transactions pursuant to Rule 16b-3(c) and Rule 16b-3(d).

SEC source: 0001553350-20-000637 · vankirk4.xml · nonDerivative · entry 4

Van Kirk Richard Lee Jr · CIK 0001575056 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38,869

F3 · kind: Represents shares withheld to satisfy tax withholding obligations of the reporting person.