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For Purple Biotech Ltd. (PPBT), Ayrton Capital LLC, Alto Opportunity Master Fund, SPC - Segregated Master Portfolio B, and Waqas Khatri each report beneficial ownership of 103,250 Common Stock shares issuable upon exercise of warrants, equal to 9.99% of the class. The shares are held by the fund; Ayrton Capital is its investment manager, and Khatri is the manager’s managing member. The warrant shares are subject to a 9.99% beneficial ownership blocker. The percentage calculation uses 929,456 shares outstanding as of December 31, 2025, plus 103,250 warrant shares; reported holdings are as of September 30, 2026.
Key Figures
Warrant shares beneficially owned:103,250 Common Stock sharesReported ownership percentage:9.99%Common Stock shares outstanding:929,456 shares+1 more
4 metrics
Warrant shares beneficially owned103,250 Common Stock sharesReported holdings as of September 30, 2026; each reporting person reports the same amount.
Reported ownership percentage9.99%Each reporting person; percentage calculation uses 929,456 shares outstanding as of December 31, 2025, plus 103,250 warrant shares.
Common Stock shares outstanding929,456 sharesAs of December 31, 2025.
ADS-to-ordinary-share ratio2,000 Ordinary Shares per American Depositary ShareRatio stated for Purple Biotech’s American Depositary Shares.
Key Terms
beneficial ownership blocker, Warrants, American Depositary Shares
3 terms
beneficial ownership blockertechnical
"subject to a 9.99% beneficial ownership blocker"
A beneficial ownership blocker is a legal or structural device that prevents a shareholder from being treated as the ultimate owner of enough shares to trigger control, reporting, or voting thresholds. Think of it like a speed bump that stops an investor from reaching a stake size that would force corporate disclosure or change control rights. Investors care because it affects who controls the company, how shares vote, regulatory filings, takeover risk and therefore potential value or liquidity of their holdings.
Warrantsfinancial
"shares of Common Stock issuable on the exercise of certain warrants"
Warrants are special documents that give you the right to buy a company's stock at a set price before a certain date. They are often used as a way for companies to attract investors or raise money, and their value can increase if the company's stock price goes up.
American Depositary Sharesfinancial
"each American Depositary Share represents 2,000 Ordinary 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.
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
How many Purple Biotech (PPBT) shares do the reporting persons beneficially own?
Each of Ayrton Capital LLC, Alto Opportunity Master Fund, SPC - Segregated Master Portfolio B, and Waqas Khatri reported beneficial ownership of 103,250 Common Stock shares issuable upon exercise of warrants, equal to 9.99% of the class.
What limit applies to the Purple Biotech (PPBT) warrant shares?
The warrant shares are subject to a 9.99% beneficial ownership blocker.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
Purple Biotech Ltd.
(Name of Issuer)
American Depositary Shares, each representing 2,000 Ordinary Shares
(Title of Class of Securities)
74638P307
(CUSIP Number)
09/30/2026
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)
schemaVersion:
SCHEDULE 13G
CUSIP Number(s):
74638P307
1
Names of Reporting Persons
Ayrton Capital LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
103,250.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
103,250.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
103,250.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
9.99 %
12
Type of Reporting Person (See Instructions)
IA
SCHEDULE 13G
CUSIP Number(s):
74638P307
1
Names of Reporting Persons
Alto Opportunity Master Fund, SPC - Segregated Master Portfolio B
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
CAYMAN ISLANDS
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
103,250.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
103,250.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
103,250.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
9.99 %
12
Type of Reporting Person (See Instructions)
CO
SCHEDULE 13G
CUSIP Number(s):
74638P307
1
Names of Reporting Persons
Waqas Khatri
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
UNITED STATES
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
103,250.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
103,250.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
103,250.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
9.99 %
12
Type of Reporting Person (See Instructions)
IN
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
Purple Biotech Ltd.
(b)
Address of issuer's principal executive offices:
4 Oppenheimer Street, Science Park Rehovot L3 7670104
Item 2.
(a)
Name of person filing:
(i) Ayrton Capital LLC; (ii) Alto Opportunity Master Fund, SPC - Segregated Master Portfolio B; and (iii) Waqas Khatri
(b)
Address or principal business office or, if none, residence:
(i) Ayrton Capital LLC, 55 Post Rd West, 2nd Floor Westport, CT 06880; (ii) Alto Opportunity Master Fund, SPC - Segregated Master Portfolio B, Suite #7 Grand Pavilion Commercial Centre, 802 West Bay Road, Grand Cayman, P.O. Box 10250, Cayman Islands; and (iii) Waqas Khatri 55 Post Rd West, 2nd Floor Westport, CT 06880
(c)
Citizenship:
(i) Ayrton Capital LLC: United States; (ii) Alto Opportunity Master Fund, SPC - Segregated Master Portfolio B: Cayman Islands; and (iii) Waqas Khatri: United States
(d)
Title of class of securities:
American Depositary Shares, each representing 2,000 Ordinary Shares
(e)
CUSIP Number(s):
74638P307
Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)
A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.
Ownership
(a)
Amount beneficially owned:
Ayrton Capital LLC: 103,250; (ii) Alto Opportunity Master Fund, SPC - Segregated Master Portfolio B: 103,250; and (iii) Waqas Khatri: 103,250. Represents (i) 103,250 shares of Common Stock issuable on the exercise of certain warrants (the "Warrants") held by the Reporting Persons. The issuable shares of Common Stock related to the exercise of the Warrants are subject to a 9.99% beneficial ownership blocker. The shares reported herein represent Common Stock of Purple Biotech, Ltd. (the "Issuer") held by Alto Opportunity Master Fund, SPC- Segregated Master Portfolio B, a Cayman Islands exempted company (the "Fund"). The Fund is a private investment vehicle for which Ayrton Capital LLC, a Delaware limited liability company (the "Investment Manager"), serves as the investment manager. Waqas Khatri serves as the managing member of the Investment Manager (all of the foregoing, collectively, the "Reporting Persons").
(b)
Percent of class:
The percentages below are based on (i) 929,456 shares of Common Stock of the Issuer that were outstanding as of December 31, 2025; and (ii) 103,250 shares of Common Stock issuable on the exercise of the Warrants held by the Reporting Persons. The amount of shares outstanding was based upon a statement in the Issuer's Form 20-F filed on March 19, 2026. For the sake of clarity, the holdings of the Reporting Persons reported herein are as of September 30, 2026. (i) Ayrton Capital LLC: 9.99%; (ii) Alto Opportunity Master Fund, SPC - Segregated Master Portfolio B: 9.99%; and (iii) Waqas Khatri: 9.99%. Per the Company, each American Depositary Share represents 2,000 Ordinary Shares.
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
(i) Ayrton Capital LLC: 103,250; (ii) Alto Opportunity Master Fund, SPC - Segregated Master Portfolio B: 103,250; and (iii) Waqas Khatri: 103,250
(ii) Shared power to vote or to direct the vote:
(i) Ayrton Capital LLC: 0; (ii) Alto Opportunity Master Fund, SPC - Segregated Master Portfolio B: 0; and (iii) Waqas Khatri: 0
(iii) Sole power to dispose or to direct the disposition of:
Ownership of more than 5 Percent on Behalf of Another Person.
Not Applicable
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
Not Applicable
Item 8.
Identification and Classification of Members of the Group.
Not Applicable
Item 9.
Notice of Dissolution of Group.
Not Applicable
Item 10.
Certifications:
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
Ayrton Capital LLC
Signature:
/s/ Waqas Khatri
Name/Title:
Waqas Khatri / Managing Member
Date:
11/12/2026
Alto Opportunity Master Fund, SPC - Segregated Master Portfolio B
