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iBio, Inc. reporting persons led by Logos Global Management state they beneficially own 0 shares of Common Stock and report 0% ownership. The filing lists Logos Global, Logos Global GP, Logos Global Master Fund, Logos GP and Arsani William and disclaims group membership. The reporting persons certified the holdings and signed the amendment on 05/15/2026.
Insights
Schedules confirm no beneficial stake and no group affiliation.
The filing amends a Schedule 13G/A to state each reporting person has 0 shares and 0% ownership of iBio Common Stock. It expressly disclaims beneficial ownership under Rule 13d-3 and disclaims group status.
Cash‑flow treatment and any trading intentions are not included; subsequent filings would disclose any ownership changes. Signatures are dated 05/15/2026.
Key Figures
Ownership reported:0 sharesPercent of class:0%CUSIP:451033708+1 more
4 metrics
Ownership reported0 sharesAmount beneficially owned by each reporting person
Percent of class<percent>0%</percent>Percent of iBio Common Stock owned as reported
CUSIP451033708iBio Common Stock CUSIP shown on cover
Signature date<date>05/15/2026</date>Date signatures appear on the amendment
Key Terms
Schedule 13G/A, beneficial ownership, Rule 13d-3
3 terms
Schedule 13G/Aregulatory
"Amendment No. 2 iBio, Inc. Common Stock"
A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.
beneficial ownershipregulatory
"Each reporting person disclaims beneficial ownership of Common Stock"
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
Rule 13d-3regulatory
"as defined in Rule 13d-3 under the Act"
Rule 13d-3 defines who is treated as the beneficial owner of a company’s shares for U.S. securities disclosure rules — essentially anyone who has the power to vote or direct how shares are voted, or the power to buy or sell them, even if they don’t hold the certificates. For investors this matters because crossing certain ownership thresholds triggers public filing and disclosure obligations and signals potential control or influence, much like having the keys to a car implies you can drive it even if it’s registered to someone else.
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What does Logos Global report for IBIO ownership?
Logos Global and affiliated reporting persons state they hold 0 shares of iBio Common Stock, representing 0% ownership. The filing is an amended Schedule 13G/A signed on 05/15/2026 and includes disclaimers about group status and beneficial ownership.
Does the filing create a group under SEC rules for IBIO?
No. The reporting persons expressly disclaim membership in a group. The filing states they are filing jointly but deny being a group and disclaim beneficial ownership under Rule 13d-3, limiting any group attribution.
Who signed the Schedule 13G/A amendment for IBIO?
Dr. William Arsani signed on behalf of Logos Global entities and as a reporting person. Multiple signature blocks show /s/ Arsani William with the title Managing Partner/Managing Member and the date 05/15/2026.
Does this filing indicate plans to acquire control of IBIO?
No. The signatory certifies the securities were not acquired to change or influence control and were not acquired in connection with any transaction having that purpose, except nomination activities referenced under the cited rule.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 2)
iBio, Inc.
(Name of Issuer)
Common Stock
(Title of Class of Securities)
451033708
(CUSIP Number)
03/31/2026
(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):
451033708
1
Names of Reporting Persons
Logos Global 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
0.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
0.00
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)
0 %
12
Type of Reporting Person (See Instructions)
IA, PN
SCHEDULE 13G
CUSIP Number(s):
451033708
1
Names of Reporting Persons
Logos Global Management GP 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
0.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
0.00
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)
0 %
12
Type of Reporting Person (See Instructions)
HC, OO
SCHEDULE 13G
CUSIP Number(s):
451033708
1
Names of Reporting Persons
Logos Global Master Fund 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
0.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
0.00
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)
0 %
12
Type of Reporting Person (See Instructions)
PN
SCHEDULE 13G
CUSIP Number(s):
451033708
1
Names of Reporting Persons
Logos GP 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
0.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
0.00
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)
0 %
12
Type of Reporting Person (See Instructions)
HC, OO
SCHEDULE 13G
CUSIP Number(s):
451033708
1
Names of Reporting Persons
Arsani William
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
0.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
0.00
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)
0 %
12
Type of Reporting Person (See Instructions)
HC, IN
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
iBio, Inc.
(b)
Address of issuer's principal executive offices:
11750 Sorrento Valley Road, Suite 200, San Diego, CA 92121
Item 2.
(a)
Name of person filing:
Logos Global Management LP ("Logos Global")
Logos Global Management GP LLC ("Logos Global GP")
Logos Global Master Fund LP ("Global Fund")
Logos GP LLC ("Logos GP")
Arsani William
Logos Global is the investment adviser to investment funds, including Global Fund. Logos Global GP is the general partner of Logos Global. Logos GP is the general partner of Global Fund. Dr. William is a control person of Logos Global, Logos Global GP and Logos GP.
The reporting persons are filing this statement jointly but not as members of a group, and they expressly disclaim membership in a group. Each reporting person disclaims beneficial ownership of Common Stock except to the extent of that person's pecuniary interest therein. In addition, the filing of this Schedule 13G on behalf of the Global Fund should not be construed as an admission that it is, and it disclaims that it is, a beneficial owner, as defined in Rule 13d-3 under the Act, of any Common Stock covered by this Schedule 13G.
(b)
Address or principal business office or, if none, residence:
One Letterman Drive, Building C, Suite C3-350, San Francisco, California 94129
(c)
Citizenship:
See Item 4 of the cover sheet for each reporting person.
(d)
Title of class of securities:
Common Stock
(e)
CUSIP No.:
451033708
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:
Logos Global: 0
Logos Global GP: 0
Global Fund: 0
Logos GP: 0
Arsani William: 0
(b)
Percent of class:
Logos Global: 0%
Logos Global GP: 0%
Global Fund: 0%
Logos GP: 0%
Arsani William: 0%
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
Logos Global: 0
Logos Global GP: 0
Global Fund: 0
Logos GP: 0
Arsani William: 0
(ii) Shared power to vote or to direct the vote:
Logos Global: 0
Logos Global GP: 0
Global Fund: 0
Logos GP: 0
Arsani William: 0
(iii) Sole power to dispose or to direct the disposition of:
Logos Global: 0
Logos Global GP: 0
Global Fund: 0
Logos GP: 0
Arsani William: 0
(iv) Shared power to dispose or to direct the disposition of:
Logos Global: 0
Logos Global GP: 0
Global Fund: 0
Logos GP: 0
Arsani William: 0
Item 5.
Ownership of 5 Percent or Less of a Class.
Ownership of 5 percent or less of a class
Item 6.
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.
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above 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.
Logos Global Management LP
Signature:
/s/ Arsani William
Name/Title:
Managing Partner
Date:
05/15/2026
Logos Global Management GP LLC
Signature:
/s/ Arsani William
Name/Title:
Managing Member
Date:
05/15/2026
Logos Global Master Fund LP
Signature:
/s/ Arsani William
Name/Title:
Managing Member of Logos GP LLC, General Partner of Logos Global Master Fund LP
Date:
05/15/2026
Logos GP LLC
Signature:
/s/ Arsani William
Name/Title:
Managing Member
Date:
05/15/2026
Arsani William
Signature:
/s/ Arsani William
Name/Title:
Reporting person
Date:
05/15/2026
Exhibit Information
EXHIBIT 99.1-AGREEMENT REGARDING JOINT FILING OF STATEMENT ON SCHEDULE 13D OR 13G
