How many institutions held IOBTQ - IO Biotech, Inc. - Common Stock, par value $0.001 per share in Q4 2023?

18 institutional investors reported IOBTQ - IO Biotech, Inc. - Common Stock, par value $0.001 per share for Q4 2023. 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

Q4 2023 13F Holders as of 31 Dec 2023

Security type / class: Equity / Common Stock, par value $0.001 per share
Total 13F shares: 29,400,721
Total 13F value: $55,273,224
Share change: -267,944
SEC-reported price per share: $1.88
Number of holders: 18
Value change: +$999,356
Number of buys: 7
Number of sells: 8
Shares outstanding: 79,751,533

Security key

449778109

Report period

Q4 2023

Institutions

Top holders

IOBTQ full security history Ownership snapshot Full 13F holder table Newer quarter: Q3 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: Q3 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

0/15

Latest evidence

30 Sep 2023

3/4/5 13F Highest disclosed value: $14,438,960 15 rows are not safely comparable across share classes. Showing 1-6 of 15 holder rows.

Quick read

Invest A/s Lundbeckfond has the largest disclosed position value at $14.44M.

0 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.

Disclosed position value Top 5

Invest A/s Lundbeckfond $14.44M

Vivo Capital IX, LLC $9.51M

HBM Healthcare Investments (Cayma... $2.78M

Kurma Partners $645.2K

Vivo Capital, LLC $8.7M

Value bars compare disclosed positions; verify each figure against the linked filing evidence.

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 Director, 10%+ Owner 3/4/5	— mixed-class rows	$14,438,960 21,851,920 shares mixed-class rows	—	09 Aug 2023
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
Vivo Capital, LLC	13F Company 13F	— denominator unverified	$8,704,549 6,173,439 shares	—	30 Sep 2023
Novo Holdings A/S	13F Company 13F	— denominator unverified	$8,103,364 5,747,067 shares	—	30 Sep 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 Q4 2023

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

Institutions

29,400,721

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 Q4 2023 vs Q1 2026 Across Filers

Q1 2026 holders

Q4 2023 holders

Holder diff

Investor	Q1 2026 Shares	Q4 2023 Shares	Share Diff	Share Chg %	Q1 2026 value	Q4 2023 value	Value change	Value Chg %

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

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend