Item 4 of the Schedule 13D is amended to add the following: On March 25, 2026, Value Base, together with Michael and Klil Zisapel (the "Zisapels"), sent a letter to the Board of Directors of the Company (the "Demand Letter") requesting that the Company convene a special meeting of the Company's shareholders (the "Special Meeting") pursuant to the relevant provisions of the Israeli Companies Law, 5759-1999, and the Company's Amended and Restated Articles of Association (the "Articles"). Pursuant to the Demand Letter, the agenda for the Special Meeting would be to (i) amend the Articles to provide that the Board of Directors shall consist of not less than three nor more than seven directors (instead of nine), (ii) amend the Articles to provide that directors may be elected at any general meeting of shareholders (instead of only at the annual general meeting), (iii) amend the Articles to provide that the tenure of any directors appointed by the Board of Directors to fill vacancies prior to the Special Meeting shall terminate upon the conclusion of the Special Meeting, (iv) remove the following directors from the Company's Board of Directors, effective as of the conclusion of the Special Meeting: Rami Schwartz, Rachel (Hili) Bennun, Oren Most, Yaron Ravkeie and Andre Feutch, (v) nominate for election by shareholders of the following candidates for the Board of Directors: Liat Aaronson, Tomer Jacob and Guy Levit (the "Candidates") and (vi) approve compensation, exemption, indemnification and insurance for the Candidates at levels commensurate with those currently provided to existing directors. A copy of the Demand Letter is filed herewith as Exhibit 3. Except for the Demand Letter, there is no other agreement between the Reporting Persons and the Zisapels regarding any cooperation, joint ventures, commitment to vote together or any other agreement of any kind concerning the Company's Ordinary Shares.

Item 5(a) of the Schedule 13D is amended to add the following: According to information provided by the Zisapels, as of the date on the cover of this Amendment, Michael Zisapel and Klil Zisapel have sole voting and dispositive power over 1,730,029 and 1,730,030 Ordinary Shares, respectively, that are mutually held by the Zisapels in security bank accounts. In addition, each of the Zisapels has shared voting and dispositive power over an aggregate of 542,147 Ordinary Shares owned by Lomsha Ltd and Michael & Klil Holdings (93) Ltd., entities in which each owns a 50% interest. Because the Zisapels may be deemed to constitute a "group" for purposes of Section 13(d) of the Exchange Act, each of the Zisapels may be deemed the beneficial owners of 2,294,738 Ordinary Shares, representing approximately 14.0% of the number of Ordinary Shares outstanding. If the Reporting Persons named in this Amendment and the Zisapels were deemed to constitute a "group" for purposes of Section 13(d) of the Exchange Act, each of the Reporting Persons and the Zisapels may be deemed to share the power to vote, or direct the voting of, and share the power to dispose of, or direct the disposition of, the 3,159,747 Ordinary Shares held in the aggregate by the Reporting Persons and the Zisapels, which would represent approximately 19.26% of the number of Ordinary Shares outstanding. However, each of the Reporting Persons specifically disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein. Neither the filing of this Amendment nor any of its contents shall be deemed an admission that the Reporting Persons are, for purposes of Section 13(d) of the Exchange Act, the beneficial owners of any securities of the Issuer he or it does not directly own, or that a group exists for purposes of Schedule 13(d) of the Exchange Act or for any other purpose, and each Reporting Person and the Zisapels disclaims the existence of any such group.

The information set forth in Item 5(a) is incorporated herein by reference.

No transactions in the Ordinary Shares were effected by the Reporting Persons during the period beginning 60 days prior to the filing of this statement.

No person, other than the Reporting Persons, has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the shares of Ordinary Shares referred to in this Item 5.

Not applicable.

Item 6 of the Schedule 13D is amended and restated as follows: The information set forth in Item 4 is incorporated herein by reference.

Item 7 of the Schedule 13D is amended and restated as follows The following Exhibits are filed herewith: Exhibit 1: Joint Filing Agreement by and among the Reporting Persons (incorporated herein by reference to Exhibit 1 to Schedule 13D filed by the Reporting Persons on February 17, 2026) Exhibit 2: Attorney's Certification certifying the signature authority of the persons signing on behalf of Value Base Hedge Fund Ltd. (incorporated herein by reference to Exhibit 2 to Schedule 13D filed by the Reporting Persons on February 17, 2026) Exhibit 3: Letter dated March 25, 2026 to the Board of Directors of Radcom Ltd.