Security key
449778109
IO Biotech, Inc. - Common Stock, par value $0.001 per share (IOBTQ)
CUSIP: 449778109
Q4 2025 13F Holders as of 31 Dec 2025
- Security type / class
- Equity / Common Stock, par value $0.001 per share
- Total 13F shares
- 7,848,183
- Total 13F value
- $4,778,900
- Share change
- -2,047,692
- SEC-reported price per share
- $0.61
- Number of holders
- 22
- Value change
- -$1,143,305
- Number of buys
- 8
- Number of sells
- 12
- Shares outstanding
- 79,751,533
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2025
Institutions
22
Top holders
10
IOBTQ full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q1 2026
Previous quarter: Q3 2025
IO Biotech, Inc. SEC filings
IO Biotech, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 449778109
Recent filing periods:
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
Samsara BioCapital, L.P.
Disclosed value leader
Novo Holdings A/S
Comparable rows
15/15
Latest evidence
30 Sep 2025
13D/G
3/4/5
13F
Lead comparable stake: 3.8%
13D/G row: Samsara BioCapital, L.P.
Showing 1-6 of 15 holder rows.
Quick read
Samsara BioCapital, L.P. leads the comparable SEC ownership view at 3.8%.
15 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 Samsara BioCapital, L.P.'s linked filing trail.
Comparable ownership
Top 5
Samsara BioCapital, L.P.
3.8%
Novo Holdings A/S
3.2%
Ikarian Capital, LLC
1.9%
MILLENNIUM MANAGEMENT LLC
1.7%
MARSHALL WACE, LLP
1.3%
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 |
|---|---|---|---|---|---|
| Samsara BioCapital, L.P. |
13D/G
|
3.8%
|
$2,578,946
2,631,578 shares
|
$0 | 31 Dec 2024 |
| Novo Holdings A/S |
3/4/5
13F
10%+ Owner · Company
|
3.2%
from 13F
|
$5,709,989
6,823,584 shares
mixed-class rows
|
— | 25 Jul 2024 |
| Ikarian Capital, LLC |
13F
Company
|
1.9%
|
$554,051
1,525,893 shares
|
— | 30 Sep 2025 |
| MILLENNIUM MANAGEMENT LLC |
13F
Company
|
1.7%
|
$505,579
1,392,396 shares
|
— | 30 Sep 2025 |
| MARSHALL WACE, LLP |
13F
Company
|
1.3%
|
$378,947
1,052,631 shares
|
— | 30 Sep 2025 |
| BANK OF AMERICA CORP /DE/ |
13F
Company
|
1%
|
$290,383
799,953 shares
|
— | 30 Sep 2025 |
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 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
22
Shares
7,848,183
Rows available
22
| 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 2025 vs Q3 2025 Across Filers
Q3 2025 holders
21
Q4 2025 holders
22
Holder diff
1
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q4 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend