How many institutions held IOBTQ - IO Biotech, Inc. - Common Stock, par value $0.001 per share in Q1 2026?

12 institutional investors reported IOBTQ - IO Biotech, Inc. - Common Stock, par value $0.001 per share for Q1 2026. Use the holders table for investor-level position and value details.

IO Biotech, Inc. - Common Stock, par value $0.001 per share (IOBTQ)

Q: What does CUSIP 449778109 represent in this 13F holders report?

CUSIP 449778109 is the security identifier for IOBTQ - IO Biotech, Inc. - Common Stock, par value $0.001 per share used to aggregate holder disclosures.

CUSIP: 449778109

Q1 2026 13F Holders as of 31 Mar 2026

Security type / class: Equity / Common Stock, par value $0.001 per share
Total 13F shares: 3,391,578
Total 13F value: $199,038
Share change: -4,456,605
SEC-reported price per share: $0.06
Number of holders: 12
Value change: -$2,568,512
Number of buys: 4
Number of sells: 17
Shares outstanding: 79,751,533

Security key

449778109

Report period

Q1 2026

Institutions

Top holders

IOBTQ full security history Ownership snapshot Full 13F holder table Newer quarter: Q2 2026 Previous quarter: Q4 2025 IO Biotech, Inc. SEC filings IO Biotech, Inc. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 449778109

Newer quarter: Q2 2026 Previous quarter: Q4 2025

Recent filing periods:

Q2 2026 Q1 2026 Q4 2025 Q3 2025

Ownership snapshot

Top reported holders of IOBTQ - IO Biotech, Inc. - Common Stock, par value $0.001 per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

Invest A/s Lundbeckfond

Disclosed value leader

Invest A/s Lundbeckfond

Comparable rows

3/15

Latest evidence

31 Dec 2025

3/4/5 13D/G 13F Lead comparable stake: 27% 12 rows are not safely comparable across share classes. 13D/G row: Invest A/s Lundbeckfond Showing 1-6 of 15 holder rows.

Quick read

Invest A/s Lundbeckfond leads the comparable SEC ownership view at 27%.

3 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Invest A/s Lundbeckfond's linked filing trail.

Comparable ownership Top 3

Invest A/s Lundbeckfond 27%

Samsara BioCapital, L.P. 3.8%

Novo Holdings A/S 3.3%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Invest A/s Lundbeckfond	3/4/5 13D/G Director, 10%+ Owner · Lundbeckfond Invest A/S 3/4/5 13D/G	27% Reported 13D/G · 31 Mar 2026	$14,438,960 21,851,920 shares mixed-class rows	—	09 Aug 2023
Samsara BioCapital, L.P.	13D/G 13D/G	3.8% Reported 13D/G · 31 Dec 2024	$2,578,946 2,631,578 shares	$0	31 Dec 2024
Novo Holdings A/S	3/4/5 13D/G 13F 10%+ Owner · Company 3/4/5 13D/G 13F	3.3% Reported 13D/G · 21 Jan 2026	$5,709,989 6,823,584 shares mixed-class rows	—	25 Jul 2024
Vivo Capital IX, LLC	3/4/5 10%+ Owner 3/4/5	— mixed-class rows	$9,510,598 12,346,878 shares mixed-class rows	—	09 Aug 2023
HBM Healthcare Investments (Cayman) Ltd.	3/4/5 10%+ Owner 3/4/5	— denominator unverified	$2,784,714 2,690,545 shares	—	09 Nov 2021
Kurma Partners	3/4/5 10%+ Owner 3/4/5	— denominator unverified	$645,248 623,428 shares	—	09 Aug 2023

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

3,391,578

Rows available

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2026 vs Q4 2025 Across Filers

Q4 2025 holders

Q1 2026 holders

Holder diff

-10

Investor	Q4 2025 Shares	Q1 2026 Shares	Share Diff	Share Chg %	Q4 2025 value	Q1 2026 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend