Latest Period
Q1 2026
Security Snapshot
IO Biotech, Inc. - Common Stock, $0.001 Par Value Per Share (IOBTQ) Institutional Ownership
CUSIP: 449778109
13F Institutional Holders and Ownership History from Q4 2021 to Q1 2026
Institutions Reporting
12
Shares (Excl. Options)
3,391,578
Price
$0.06
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- Security type / class
- Equity / Common Stock, $0.001 Par Value Per Share
- Symbol
- IOBTQ on OTC
- Shares outstanding
- 73,755,848
- Reported price per share
- $0.01
- Price from insider filings
- $0.01
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 3,391,578
- Total reported value
- $199,038
- Portfolio coverage rank
- 0%
- Share change
- -4,456,605
- Value change
- -$2,568,512
- Number of holders
- 12
Security identity
Issuer context
Latest holder snapshot
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Key facts
- IOBTQ - IO Biotech, Inc. - Common Stock, $0.001 Par Value Per Share is tracked under CUSIP 449778109.
- 12 institutions reported positions in Q1 2026.
- 3 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 22 to 12 between Q4 2025 and Q1 2026.
- Reported value moved from $4,778,900 to $199,038.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 12 institutions filings for Q1 2026.
Security key
449778109
Latest holder period
Q1 2026
13F holders
12
13D/G owners
3
CIK / CUSIP context first
Open Q1 2026 holders
IOBTQ full holder history
IO Biotech, Inc. SEC filings
IO Biotech, Inc. company facts
IO Biotech, Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 449778109:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
3
Security
IOBTQ
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Samsara BioCapital, L.P. | 3.8% | $2,578,946 | 2,631,578 | Samsara BioCapital, L.P. | 31 Dec 2024 | |||
| Novo Holdings A/S | 3.3% | -57% | $1,827,160 | -$1,859,215 | 2,469,135 | -50% | Novo Holdings A/S | 21 Jan 2026 |
| HBM Healthcare Investments (Cayman) Ltd. | 3.3% | -61% | $535,467 | -$679,689 | 2,433,943 | -56% | HBM Healthcare Investments (Cayman) Ltd. | 02 Apr 2026 |
As of 31 Mar 2026, 12 institutional investors reported holding 3,391,578 shares of IO Biotech, Inc. - Common Stock, $0.001 Par Value Per Share (IOBTQ). This represents 4.6% of the company’s total 73,755,848 outstanding shares.
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
18
Latest
Q1 2026
Rows shown
1-18 of 18
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 3,391,578 | $199,038 | -$2,568,512 | $0.06 | 12 |
| 2025 Q4 | 7,848,183 | $4,778,900 | -$1,143,305 | $0.61 | 22 |
| 2025 Q3 | 9,895,875 | $3,589,663 | -$13,417,589 | $0.36 | 21 |
| 2025 Q2 | 18,182,707 | $25,273,480 | -$1,285,024 | $1.39 | 26 |
| 2025 Q1 | 19,066,617 | $20,781,978 | -$660,538 | $1.09 | 21 |
| 2024 Q4 | 19,692,862 | $18,114,763 | -$4,833,042 | $0.92 | 26 |
| 2024 Q3 | 23,591,882 | $24,769,965 | -$2,959,503 | $1.05 | 19 |
| 2024 Q2 | 26,183,049 | $30,634,167 | -$1,443,320 | $1.17 | 19 |
| 2024 Q1 | 27,341,910 | $47,354,293 | -$3,558,302 | $1.73 | 17 |
| 2023 Q4 | 29,400,721 | $55,273,224 | +$999,356 | $1.88 | 18 |
| 2023 Q3 | 29,668,665 | $41,702,613 | +$24,426,263 | $1.41 | 19 |
| 2023 Q2 | 12,246,779 | $23,953,554 | -$3,111,706 | $1.96 | 15 |
| 2023 Q1 | 13,917,553 | $26,081,803 | -$1,175,062 | $1.88 | 17 |
| 2022 Q4 | 14,281,285 | $32,846,954 | -$2,578,155 | $2.30 | 17 |
| 2022 Q3 | 15,335,530 | $41,559,000 | -$326,875 | $2.71 | 20 |
| 2022 Q2 | 15,453,557 | $72,167,000 | +$2,681,635 | $4.67 | 18 |
| 2022 Q1 | 14,858,852 | $76,863,500 | -$1,060,884 | $5.30 | 19 |
| 2021 Q4 | 12,982,583 | $82,349,000 | +$82,349,000 | $6.40 | 19 |