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Chemomab (CMMB) director discloses option-heavy initial share ownership

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

Rhea-AI Filing Summary

Chemomab Therapeutics Ltd. director Darvish Nissim filed an initial ownership report showing existing equity interests in the company. The filing lists several stock options over American Depositary Shares with different exercise prices and expiration dates, alongside a smaller direct holding of 300 American Depositary Shares.

Multiple option grants, including those from October 28, 2016, April 19, 2021, March 7, 2022, March 21, 2023, and June 1, 2024, are fully vested and exercisable. Another grant from June 14, 2023 vests in 36 monthly installments and is scheduled to be fully exercisable by June 14, 2026.

Positive

  • None.

Negative

  • None.
Insider Darvish Nissim
Role Director
Type Security Shares Price Value
holding Stock option (right to buy American Depositary Shares) -- -- --
holding Stock option (right to buy American Depositary Shares) -- -- --
holding Stock option (right to buy American Depositary Shares) -- -- --
holding Stock option (right to buy American Depositary Shares) -- -- --
holding Stock option (right to buy American Depositary Shares) -- -- --
holding Stock option (right to buy American Depositary Shares) -- -- --
holding Stock option (right to buy American Depositary Shares) -- -- --
holding American Depositary Shares -- -- --
Holdings After Transaction: Stock option (right to buy American Depositary Shares) — 2,531 shares (Direct); American Depositary Shares — 300 shares (Direct)
Footnotes (1)
  1. The options reported in this row were granted to the Reporting Person by the Issuer on October 28, 2016, and are fully vested and exercisable as of the date of this report. The options reported in this row were granted to the Reporting Person by the Issuer on April 19, 2021, and are fully vested and exercisable as of the date of this report. The options reported in this row were granted to the Reporting Person by the Issuer on March 7, 2022, and are fully vested and exercisable as of the date of this report. The options reported in this row were granted to the Reporting Person by the Issuer on March 21, 2023, and are fully vested and exercisable as of the date of this report. The options reported in this row were granted to the Reporting Person by the Issuer on June 14, 2023, and vest and become exercisable in 36 equal monthly installments of 2.77%, such that all options reported in this row will be exercisable on June 14, 2026. The options reported in this row were granted to the Reporting Person by the Issuer on June 1, 2024, and are fully vested and exercisable as of the date of this report.
Option underlying shares 2,531 ADS Exercise price $3.20; expiration October 27, 2026
Option underlying shares 2,971 ADS Exercise price $109.04; expiration April 19, 2031
Option underlying shares 1,705 ADS Exercise price $14.12; expiration March 7, 2032
Option underlying shares 1,714 ADS Exercise price $6.48; expiration March 21, 2033
Option underlying shares 5,143 ADS Exercise price $6.80; expiration June 14, 2033
Option underlying shares 4,221 ADS Exercise price $3.44; expiration June 1, 2034
Option underlying shares 6,599 ADS Exercise price $5.24; expiration June 16, 2035
Direct ADS holding 300 ADS Directly held American Depositary Shares
American Depositary Shares financial
"underlying security title is listed as American Depositary Shares"
American depositary shares (ADSs) are a way for investors in the United States to buy shares of foreign companies without dealing with international markets directly. They represent ownership in a foreign company's stock and are traded on U.S. stock exchanges, making it easier for American investors to buy, sell, and own parts of companies from around the world.
Stock option (right to buy American Depositary Shares) financial
"security title is Stock option (right to buy American Depositary Shares)"
fully vested and exercisable financial
"options reported in this row were granted ... and are fully vested and exercisable"
vest and become exercisable in 36 equal monthly installments financial
"options ... vest and become exercisable in 36 equal monthly installments of 2.77%"
initial ownership report financial
"Form 3 functions as an initial ownership report for the insider"
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*
Darvish Nissim

(Last)(First)(Middle)
C/O CHEMOMAB THERAPEUTICS LTD.
10 HABARZEL ST., BUILDING C, 10TH FLOOR

(Street)
TEL AVIV6158101

(City)(State)(Zip)

ISRAEL

(Country)
2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026
3. Issuer Name and Ticker or Trading Symbol
Chemomab Therapeutics Ltd. [ CMMB ]
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)
American Depositary Shares300D
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
Stock option (right to buy American Depositary Shares) (1)10/27/2026American Depositary Shares2,531$3.2D
Stock option (right to buy American Depositary Shares) (2)04/19/2031American Depositary Shares2,971$109.04D
Stock option (right to buy American Depositary Shares) (3)03/07/2032American Depositary Shares1,705$14.12D
Stock option (right to buy American Depositary Shares) (4)03/21/2033American Depositary Shares1,714$6.48D
Stock option (right to buy American Depositary Shares) (5)06/14/2033American Depositary Shares5,143$6.8D
Stock option (right to buy American Depositary Shares) (6)06/01/2034American Depositary Shares4,221$3.44D
Stock option (right to buy American Depositary Shares)06/01/202606/16/2035American Depositary Shares6,599$5.24D
Explanation of Responses:
1. The options reported in this row were granted to the Reporting Person by the Issuer on October 28, 2016, and are fully vested and exercisable as of the date of this report.
2. The options reported in this row were granted to the Reporting Person by the Issuer on April 19, 2021, and are fully vested and exercisable as of the date of this report.
3. The options reported in this row were granted to the Reporting Person by the Issuer on March 7, 2022, and are fully vested and exercisable as of the date of this report.
4. The options reported in this row were granted to the Reporting Person by the Issuer on March 21, 2023, and are fully vested and exercisable as of the date of this report.
5. The options reported in this row were granted to the Reporting Person by the Issuer on June 14, 2023, and vest and become exercisable in 36 equal monthly installments of 2.77%, such that all options reported in this row will be exercisable on June 14, 2026.
6. The options reported in this row were granted to the Reporting Person by the Issuer on June 1, 2024, and are fully vested and exercisable as of the date of this report.
Remarks:
This Form 3 has been filed after March 18, 2026 but prior to April 20, 2026 in reliance on the temporary relief made available to the directors and officers of certain foreign private issuers by the Staff of the Securities and Exchange Commission in its no-action letter dated March 13, 2026.
/s/ Nissim Darvish04/10/2026
** 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)

FAQ

What does the Chemomab (CMMB) Form 3 filing by Darvish Nissim show?

The Form 3 shows director Darvish Nissim’s initial ownership in Chemomab, mainly stock options on American Depositary Shares and 300 directly held ADS. It details each option grant’s exercise price, underlying share amount, vesting status, and expiration date.

How many Chemomab (CMMB) American Depositary Shares can Darvish Nissim acquire through stock options?

The filing lists options over several ADS blocks, including 2,531, 2,971, 1,705, 1,714, 5,143, 4,221 and 6,599 underlying shares. Each block has a specified exercise price and expiration date, reflecting different historical grant awards.

What are the key exercise prices on Darvish Nissim’s Chemomab (CMMB) stock options?

The options have exercise prices of $3.20, $109.04, $14.12, $6.48, $6.80, $3.44 and $5.24 per American Depositary Share. Each price corresponds to a separate grant and is tied to specific vesting and expiration terms disclosed in the filing.

When do Darvish Nissim’s Chemomab (CMMB) options over ADS expire?

Expiration dates range from October 27, 2026 through June 16, 2035. Each option block has its own maturity, with earlier grants expiring sooner and later grants, such as those with a June 16, 2035 expiry, remaining outstanding for a longer period.

Which Chemomab (CMMB) options held by Darvish Nissim are already fully vested?

Options granted on October 28, 2016, April 19, 2021, March 7, 2022, March 21, 2023 and June 1, 2024 are described as fully vested and exercisable. A separate June 14, 2023 grant is vesting monthly and is expected to be fully exercisable by June 14, 2026.

How many Chemomab (CMMB) American Depositary Shares does Darvish Nissim hold directly?

In addition to stock options, the Form 3 shows direct ownership of 300 American Depositary Shares. This is listed separately from the option positions and reflects currently held ADS, rather than rights to acquire future shares through option exercises.