Sirenia Capital Management LP and Alex Silverstein report beneficial ownership of InflaRx N.V. ordinary shares. They collectively report 8,911,348 Ordinary Shares, representing 6.1% of the class, based on 147,292,859 Ordinary Shares outstanding as cited from a May 7, 2026 prospectus.
The Reporting Persons have shared voting and dispositive power over all 8,911,348 shares and no sole voting or dispositive power. The shares are held by investment funds managed by Sirenia, and SILV Fund, Ltd. has the right to receive dividends or sale proceeds for more than 5% of the outstanding Ordinary Shares. Sirenia and Mr. Silverstein have entered into a Joint Filing Agreement to file this ownership report together.
Positive
None.
Negative
None.
Key Figures
Shares beneficially owned:8,911,348 Ordinary SharesOwnership percentage:6.1%Shares outstanding:147,292,859 Ordinary Shares+2 more
5 metrics
Shares beneficially owned8,911,348 Ordinary SharesBeneficially owned by Sirenia Capital Management LP and Alex Silverstein
Ownership percentage6.1%Percentage of InflaRx N.V. ordinary shares outstanding
Shares outstanding147,292,859 Ordinary SharesAggregate shares outstanding referenced from May 7, 2026 prospectus
Shared voting power8,911,348 Ordinary SharesShares over which Reporting Persons share voting power
Shared dispositive power8,911,348 Ordinary SharesShares over which Reporting Persons share dispositive power
"the beneficial owner of the securities reported herein"
A beneficial owner is the person who ultimately owns or controls a financial asset or property, even if their name isn't directly on official documents. Think of it like someone who secretly holds the keys to a safe deposit box—others may appear to have access, but the true owner is the one who benefits from what's inside. Identifying beneficial owners helps ensure transparency and prevent illegal activities like money laundering or fraud.
shared voting powerfinancial
"Shared Voting Power 8,911,348.00"
Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.
shared dispositive powerfinancial
"Shared Dispositive Power 8,911,348.00"
Schedule 13Gregulatory
"have agreed to file this jointly in accordance with the provisions of Rule 13d-1(k)"
A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.
Joint Filing Agreementregulatory
"have entered into a Joint Filing Agreement, a copy of which is filed"
FAQ
What percentage of InflaRx N.V. (IFRX) does Sirenia Capital report owning?
Sirenia Capital Management LP and Alex Silverstein report beneficial ownership of 6.1% of InflaRx N.V.’s ordinary shares, based on 147,292,859 shares outstanding as referenced from a May 7, 2026 prospectus.
How many InflaRx N.V. (IFRX) shares are reported as beneficially owned by Sirenia Capital?
The Reporting Persons disclose beneficial ownership of 8,911,348 InflaRx N.V. ordinary shares. These shares are held by funds managed by Sirenia, with shared voting and dispositive power over the full amount and no sole authority.
Who are the Reporting Persons in the InflaRx N.V. (IFRX) Schedule 13G filing?
The Reporting Persons are Sirenia Capital Management LP and Alex Silverstein, its related control person. They file jointly under a Joint Filing Agreement covering ordinary shares held by investment funds managed by Sirenia.
What is the basis for the ownership percentage reported for IFRX?
The 6.1% ownership figure is calculated using an aggregate of 147,292,859 InflaRx ordinary shares outstanding, as reported in an issuer prospectus filed under Rule 424(b)(5) on May 7, 2026, which the Reporting Persons reference.
Who has rights to dividends or sale proceeds on the IFRX shares held via Sirenia?
The filing states that SILV Fund, Ltd. has the right to receive, or direct the receipt of, dividends or sale proceeds from more than 5% of InflaRx’s outstanding ordinary shares held through the Sirenia-managed structure.
Do Sirenia and Alex Silverstein have sole or shared voting power over their IFRX stake?
They report 0 shares with sole voting or dispositive power and 8,911,348 shares with shared voting and shared dispositive power, reflecting their joint control over how these InflaRx ordinary shares are voted and disposed.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
InflaRx N.V.
(Name of Issuer)
Ordinary Shares, nominal value 0.12 euro per share
(Title of Class of Securities)
N44821101
(CUSIP Number)
06/30/2026
(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):
N44821101
1
Names of Reporting Persons
Sirenia Capital Management LP
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
0.00
6
Shared Voting Power
8,911,348.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
8,911,348.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
8,911,348.00
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)
6.1 %
12
Type of Reporting Person (See Instructions)
IA, PN
SCHEDULE 13G
CUSIP Number(s):
N44821101
1
Names of Reporting Persons
Alex Silverstein
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
0.00
6
Shared Voting Power
8,911,348.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
8,911,348.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
8,911,348.00
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)
6.1 %
12
Type of Reporting Person (See Instructions)
HC, IN
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
InflaRx N.V.
(b)
Address of issuer's principal executive offices:
Winzerlaer Str. 2, Jena, Germany 07745
Item 2.
(a)
Name of person filing:
This statement is filed by:
(i) Sirenia Capital Management LP ("Sirenia") with respect to the ordinary shares, nominal value 0.12 euro per share ("Ordinary Shares"), of InflaRx N.V. (the "Issuer") held by investment funds it manages (the "Sirenia Funds"); and
(ii) Alex Silverstein ("Mr. Silverstein"), the managing member of Sirenia Capital Management GP LLC, the general partner of Sirenia, with respect to the Ordinary Shares held by the Sirenia Funds.
The foregoing persons are hereinafter sometimes collectively referred to as the "Reporting Persons."
The filing of this statement should not be construed as an admission that any of the foregoing persons or any Reporting Person is, for the purposes of Section 13 of the Securities Exchange Act of 1934 (the "Act"), the beneficial owner of the securities reported herein.
Sirenia and Mr. Silverstein have entered into a Joint Filing Agreement, a copy of which is filed with this Schedule 13G as Exhibit 99.1, pursuant to which they have agreed to file this Schedule 13G jointly in accordance with the provisions of Rule 13d-1(k) of the Act.
(b)
Address or principal business office or, if none, residence:
The address of the principal business office of Sirenia and Mr. Silverstein is 1674 Meridian Avenue, Suite 320, Miami Beach, FL 33139.
(c)
Citizenship:
Sirenia is a Delaware limited partnership. Mr. Silverstein is a United States citizen.
(d)
Title of class of securities:
Ordinary Shares, nominal value 0.12 euro per share
(e)
CUSIP Number(s):
N44821101
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:
The information required by Item 4(a) is set forth in Row 9 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
The percentage set forth in this Schedule 13G is calculated based upon an aggregate of 147,292,859 Ordinary Shares outstanding, as reported in the Issuer's Prospectus filed pursuant to Rule 424(b)(5) with the Securities and Exchange Commission on May 7, 2026.
(b)
Percent of class:
6.1%
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
The information required by Item 4(c)(i) is set forth in Row 5 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
(ii) Shared power to vote or to direct the vote:
The information required by Item 4(c)(ii) is set forth in Row 6 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
(iii) Sole power to dispose or to direct the disposition of:
The information required by Item 4(c)(iii) is set forth in Row 7 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
(iv) Shared power to dispose or to direct the disposition of:
The information required by Item 4(c)(iv) is set forth in Row 8 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
Item 5.
Ownership of 5 Percent or Less of a Class.
Not Applicable
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.
See Item 2(a). SILV Fund, Ltd. has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, more than 5 percent of the outstanding Ordinary Shares.
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary.
See Item 2(a) and Item 3.
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.
Sirenia Capital Management LP
Signature:
/s/ Kolby Loft
Name/Title:
Kolby Loft, General Counsel & Chief Compliance Officer
