X0306 4 2021-08-02 0 0000022701 COMMUNICATIONS SYSTEMS INC JCS 0001042527 SAMPSON RANDALL D 1100 CANTERBURY ROAD SHAKOPEE MN 55379 1 0 0 0 Common Stock 2021-08-02 4 M 0 16767 6.33 A 76666 D Common Stock 2021-08-02 4 F 0 14844 7.15 D 61822 D Common Stock 2021-08-02 4 M 0 10000 4.34 A 71822 D Common Stock 2021-08-02 4 F 0 6069 7.15 D 65753 D Common Stock 2021-08-02 4 M 0 12500 2.74 A 78253 D Common Stock 2021-08-02 4 F 0 4790 7.15 D 73463 D Common Stock 2021-08-02 4 M 0 10000 4.94 A 83463 D Common Stock 2021-08-02 4 F 0 6909 7.15 D 76554 D Common Stock 681334 I See footnotes 2 and 3 Stock Option (Right-to-Buy) 11.05 2021-08-02 4 J 0 16767 0 D 2022-05-21 Common Stock 16767 0 D Stock Option (Right-to-Buy) 6.33 2021-08-02 4 M 0 16767 0 D 2023-05-19 Common Stock 16767 0 D Stock Option (Right-to-Buy) 4.34 2021-08-02 4 M 0 10000 0 D 2024-05-24 Common Stock 10000 0 D Stock Option (Right-to-Buy) 2.74 2021-08-02 4 M 0 12500 0 D 2026-05-22 Common Stock 12500 0 D Stock Option (Right-to-Buy) 4.94 2021-08-02 4 M 0 10000 0 D 2027-06-17 Common Stock 10000 0 D Includes 34,550 shares owned by reporting person individually and 25,349 shares owned jointly by reporting person and his spouse Held as of August 2, 2021 by the Sampson Family Real Estate Holdings, LLC (SFREH), of which Mr. Sampson is the sole manager. Members of SFREH include the Marian Arlis Sampson 2012 Family Revocable Trust, the Curtis A. Sampson Family Trust, and the Randall D. Sampson GST Trust, of which Mr. Sampson is the grantor and his grandchildren are beneficiaries. Mr. Sampson and his children are among the beneficiaries of the Marian Arlis Sampson 2012 Family Irrevocable Trust and the Curtis A. Sampson Family Trust. Mr. Sampson disclaims beneficial ownership in membership interests of SFREH in which he has no pecuniary interest. Following the death of Curtis A. Sampson on July 16, 2020, Randall D. Sampson became the executor of the estate of Curtis A. Sampson, became the trustee of certain trusts of Curtis A. Sampson that held Communication Systems, Inc. stock and was granted other fiduciary powers relating to Communications Systems, Inc. stock. Transactions by Mr. R. Sampson in Communications Systems, Inc. stock in his fiduciary capacity subsequent to July 16, 2020 are exempt from reporting under Rule 16a-2(d)(1). As provided under the 2011 Plan and in accordance with the determinations of the Compensation Committee, all stock options outstanding on August 2, 2021 having an exercise price equal or greater than the Fair Market Value on the August 2, 2021 closing date of the E&S Sale Transaction were terminated and cancelled as of the closing date without any payment therefor. Option fully vested on May 19, 2017 Option fully vested on May 24, 2018 Option fully vested on May 22, 2020 Option fully vested on June 17, 2021 Suzette McNally, Attorney-in-Fact for Randall D. Sampson 2021-08-04