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  4. [Form 3] Alpha Tau Medical Ltd. Initial Statement of Beneficial Ownership

Alpha Tau (DRTS) director discloses initial shares, RSUs and options

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
3

Rhea-AI Filing Summary

Alpha Tau Medical Ltd. director Nadav Kidron filed an initial statement of beneficial ownership, detailing his current equity position in the company. He directly holds 2,986 ordinary shares, along with restricted share units (RSUs) covering 7,767 and 4,680 ordinary shares. The 7,767 RSUs vest in equal monthly installments over three years starting May 12, 2025, subject to continued service, while the 4,680 RSUs vest in full on the earlier of one year from March 9, 2026 or the next annual general meeting. Kidron also holds options over 35,554 ordinary shares at an exercise price of $2.79 expiring in 2035, which vest monthly over three years from May 12, 2025, and options over 15,527 shares at $6.41 expiring in 2036, vesting in full on the earlier of one year from March 9, 2026 or the next annual general meeting.

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Insider KIDRON NADAV
Role Director
Type Security Shares Price Value
holding Options -- -- --
holding Options -- -- --
holding Ordinary Shares -- -- --
holding Restricted Share Units -- -- --
holding Restricted Share Units -- -- --
Holdings After Transaction: Options — 51,081 shares (Direct); Ordinary Shares — 2,986 shares (Direct); Restricted Share Units — 12,447 shares (Direct)
Footnotes (4)
  1. F1. These ordinary shares represent the unvested portion of a grant of restricted share units, which vests in monthly equal installments for a period of three years commencing May 12, 2025, subject to the Reporting Person's continued service.
  2. F2. These ordinary shares represent restricted share units, which will vest in their entirety upon the earlier of: one year commencing from March 9, 2026 or the next Annual General Meeting of Shareholders, subject to the Reporting Person's continued service.
  3. F3. These are options to acquire ordinary shares, which options will vest in monthly equal installments for a period of three years commencing May 12, 2025, subject to the Reporting Person's continued service.
  4. F4. These are options to acquire ordinary shares, which options will vest in their entirety upon the earlier of: one year commencing from March 9, 2026 or the next Annual General Meeting of Shareholders, subject to the Reporting Person's continued service.

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FAQ

What does the Form 3 filing by Nadav Kidron for Alpha Tau Medical (DRTS) show?
The Form 3 shows Nadav Kidron’s initial beneficial ownership in Alpha Tau Medical. It lists his directly held ordinary shares, restricted share units, and stock options, including exercise prices, expiration dates, and service-based vesting schedules tied to specific future dates.

How many ordinary shares does Nadav Kidron directly hold in Alpha Tau Medical (DRTS)?
Nadav Kidron directly holds 2,986 ordinary shares of Alpha Tau Medical. This position is separate from his restricted share units and stock options, which, if vested and exercised, could increase his effective equity exposure to the company over time.

What restricted share units (RSUs) does Nadav Kidron report for Alpha Tau Medical (DRTS)?
He reports RSUs covering 7,767 ordinary shares that vest monthly over three years from May 12, 2025, and an additional 4,680 RSUs vesting in full on the earlier of one year from March 9, 2026 or the next annual general meeting, subject to continued service.

What stock options does Nadav Kidron hold in Alpha Tau Medical (DRTS)?
He holds options over 35,554 ordinary shares at $2.79 per share expiring in 2035, and options over 15,527 shares at $6.41 expiring in 2036. Vesting is service-based, with one grant vesting monthly and the other cliff-vesting after about one year or the next meeting.

Are Nadav Kidron’s Alpha Tau Medical (DRTS) equity awards subject to vesting conditions?
Yes. Both the RSUs and options are subject to service-based vesting. Some awards vest in equal monthly installments over three years, while others vest in full on the earlier of one year from specified grant-related dates or the next annual general meeting, contingent on continued service.

Does the Form 3 for Alpha Tau Medical (DRTS) show any recent insider stock purchases or sales?
No buy or sell transactions are shown. The entries are classified as holdings, meaning the filing simply records Nadav Kidron’s existing ordinary shares, RSUs, and stock options as of the Form 3 date, rather than reporting new market purchases or sales.
SEC Form 3
FORM 3UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0104
Estimated average burden
hours per response:0.5
1. Name and Address of Reporting Person*
KIDRON NADAV
(Last)(First)(Middle)
20 MAMILLA
(Street)
JERUSALEM
(City)(State)(Zip)
UNITED STATES
(Country)		2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026		3. Issuer Name and Ticker or Trading Symbol
Alpha Tau Medical Ltd. [ DRTS ]
3a. Foreign Trading Symbol
5. If Amendment, Date of Original Filed (Month/Day/Year)
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
Officer (give title below)Other (specify below)
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Ordinary Shares2,986D
Restricted Share Units(1)7,767D
Restricted Share Units(2)4,680D
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year)3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date ExercisableExpiration DateTitleAmount or Number of Shares
Options(3)06/12/202505/19/2035Ordinary Shares35,554$2.79D
Options(4) (4)03/09/2036Ordinary Shares15,527$6.41D
Explanation of Responses:
1. These ordinary shares represent the unvested portion of a grant of restricted share units, which vests in monthly equal installments for a period of three years commencing May 12, 2025, subject to the Reporting Person's continued service.
2. These ordinary shares represent restricted share units, which will vest in their entirety upon the earlier of: one year commencing from March 9, 2026 or the next Annual General Meeting of Shareholders, subject to the Reporting Person's continued service.
3. These are options to acquire ordinary shares, which options will vest in monthly equal installments for a period of three years commencing May 12, 2025, subject to the Reporting Person's continued service.
4. These are options to acquire ordinary shares, which options will vest in their entirety upon the earlier of: one year commencing from March 9, 2026 or the next Annual General Meeting of Shareholders, subject to the Reporting Person's continued service.
/s/ Nadav Kidron03/18/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)

Source: View Original Filing on SEC EDGAR