Alpha Tau director files initial ownership report

Alpha Tau Medical Ltd. director Alan Adler filed an initial ownership report showing his equity stake in the company.

Rhea-AI Filing Summary

Alpha Tau Medical Ltd. director Alan Adler filed an initial ownership report showing his equity stake in the company. He directly holds 54,367 Ordinary Shares and 4,680 restricted share units, which will vest in full upon the earlier of one year from March 9, 2026 or the next Annual General Meeting of Shareholders, subject to his continued service.

Adler also reports multiple option grants to acquire Ordinary Shares, with exercise prices ranging from $2.98 to $11.50 per share and expiration dates between 2028 and 2036. Some of these options are already fully vested, while others vest on the same future schedule tied to the March 9, 2026 date or the next Annual General Meeting.

Insider Trade Summary

10 transactions reported

Mixed 10 txns

Insider Adler Alan

Role Director

Type	Security	Shares	Price	Value
holding	Options	--	--	--
holding	Options	--	--	--
holding	Options	--	--	--
holding	Options	--	--	--
holding	Options	--	--	--
holding	Options	--	--	--
holding	Options	--	--	--
holding	Options	--	--	--
holding	Ordinary Shares	--	--	--
holding	Restricted Share Units	--	--	--

Holdings After Transaction: Options — 228,796 contracts (Direct); Ordinary Shares — 54,367 shares (Direct); Restricted Share Units — 4,680 shares (Direct)

Footnotes (3)

1. F1. 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.
2. F2. These are options to acquire ordinary shares, which have fully vested as of the date hereof.
3. F3. 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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider position does Alan Adler report in Alpha Tau Medical (DRTS)?

Alan Adler, a director of Alpha Tau Medical, reports direct ownership of 54,367 Ordinary Shares. He also holds 4,680 restricted share units and several option grants over additional Ordinary Shares, reflecting his equity-based alignment with the company’s long-term performance.

What restricted share units does Alan Adler hold in Alpha Tau Medical (DRTS)?

Alan Adler holds 4,680 restricted share units in Alpha Tau Medical. These RSUs vest in full upon the earlier of one year from March 9, 2026 or the next Annual General Meeting of Shareholders, contingent on his continued service with the company.

What stock options does Alan Adler have in Alpha Tau Medical (DRTS)?

Alan Adler holds several option grants to acquire Alpha Tau Medical Ordinary Shares, with exercise prices from $2.98 to $11.50 per share. The options expire between 2028 and 2036, with some already fully vested and others vesting on a future schedule.

Are Alan Adler’s Alpha Tau Medical options fully vested?

Some of Alan Adler’s options are fully vested as of the reporting date, while others will vest in full upon the earlier of one year from March 9, 2026 or the next Annual General Meeting, provided he continues to serve the company.

Does Alpha Tau Medical (DRTS) Form 3 show any insider share purchases or sales?

The Form 3 filing lists holdings for Alan Adler but does not report any purchases or sales. It details his existing Ordinary Shares, restricted share units, and option grants rather than new trading activity during the reporting period.

What is the vesting condition for Alan Adler’s RSUs and some options at Alpha Tau Medical?

The RSUs and certain option grants vest in full on the earlier of one year starting March 9, 2026 or the next Annual General Meeting of Shareholders. Vesting is explicitly conditioned on Alan Adler’s continued service with Alpha Tau Medical.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 03/18/2026 - 07:03 PM Learn about SEC filing dates

SEC Form 3

FORM 3

UNITED 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^*

Adler Alan

(Last) (First) (Middle)

C/O ALPHA TAU MEDICAL

PO BOX 45044

(Street)

JERUSALEM 9777605

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form 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 Shares	54,367	D
Restricted Share Units(1)	4,680	D

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 Exercisable	Expiration Date	Title	Amount or Number of Shares
Options(2)	03/01/2019	11/26/2028	Ordinary Shares	54,318	$4.42	D
Options(2)	06/07/2022	08/08/2031	Ordinary Shares	24,727	$11.5	D
Options(2)	11/02/2022	03/21/2032	Ordinary Shares	8,945	$10.92	D
Options(2)	11/02/2022	06/02/2032	Ordinary Shares	10,657	$7.19	D
Options(2)	01/01/2024	03/09/2033	Ordinary Shares	46,905	$3.28	D
Options(2)	12/17/2024	03/07/2034	Ordinary Shares	43,257	$2.98	D
Options(2)	06/17/2025	01/22/2035	Ordinary Shares	24,460	$4.05	D
Options(3)	(3)	03/09/2036	Ordinary Shares	15,527	$6.41	D

Explanation of Responses:

1. 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.

2. These are options to acquire ordinary shares, which have fully vested as of the date hereof.

3. 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/ Alan Adler	03/18/2026
	** Signature of Reporting Person	Date
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)