IO Biotech, Inc. (IOBTQ) Shares Outstanding (2020 - 2025)
IO Biotech (IOBTQ) posted Shares Outstanding of 66.94 million for Q3 2025, up 1.6% from 65.88 million a year earlier and up 1.6% from the prior quarter.
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Analysis
IO Biotech, Inc. (IOBTQ) Shares Outstanding (2020 - 2025) Analysis & Trends
For FY2024, IO Biotech's Shares Outstanding came in at 65.88 million, up 51.3% from FY2023.
- Annual Shares Outstanding has increased for three consecutive years, with a four-year compound annual growth rate of 339.1% (FY2020 to FY2024).
- In prior years, IO Biotech's Shares Outstanding was 43.54 million in FY2023 (+51.1%), 28.82 million in FY2022 (+564.6%), 4.34 million in FY2021 and 177,200 in FY2020.
- The Q3 2025 figure stands as the highest quarterly Shares Outstanding in data going back to Q3 2020.
- On a year-over-year basis, Shares Outstanding increased in six of the last eight quarters, with growth averaging 49.1%.
- Across the past five years, year-over-year growth in Shares Outstanding ran from 0.0% in Q3 2021 to 564.6% in Q4 2022.
- According to Business Quant data, Shares Outstanding for the three prior quarters was 65.88 million (Q2 2025), 65.88 million (Q1 2025) and 65.88 million (Q4 2024).
Peer Set
Peer Comparison
Historic Data
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Historic Data
| Date | Value |
|---|---|
| Sep 30, 2025 | 66.94 Mn |
| Jun 30, 2025 | 65.88 Mn |
| Mar 31, 2025 | 65.88 Mn |
| Dec 31, 2024 | 65.88 Mn |
| Sep 30, 2024 | 65.88 Mn |
| Jun 30, 2024 | 65.88 Mn |
| Mar 31, 2024 | 65.88 Mn |
| Dec 31, 2023 | 43.54 Mn |
| Sep 30, 2023 | 50.17 Mn |
| Jun 30, 2023 | 28.82 Mn |
| Mar 31, 2023 | 28.82 Mn |
| Dec 31, 2022 | 28.82 Mn |
| Sep 30, 2022 | 28.82 Mn |
| Jun 30, 2022 | 28.82 Mn |
| Mar 31, 2022 | 28.82 Mn |
| Dec 31, 2021 | 4.34 Mn |
| Sep 30, 2021 | 177,200.00 |
| Jun 30, 2021 | 177,200.00 |
| Mar 31, 2021 | 177,200.00 |
| Dec 31, 2020 | 177,200.00 |
API Access
IO Biotech, Inc. Shares Outstanding API
Pull this series into your own models, spreadsheets and apps with the Business Quant
Historical Metrics API. The request below matches the chart above — change the
frequency, period or values and it follows. Swap YOUR_API_KEY for your own key.
https://data.businessquant.com/historic?slug=shares-outstanding&ticker=IOBTQ&period=max&api_key=YOUR_API_KEYimport requests
url = "https://data.businessquant.com/historic"
params = {"slug": "shares-outstanding", "ticker": "IOBTQ", "period": "max", "api_key": "YOUR_API_KEY"}
data = requests.get(url, params=params).json()const res = await fetch("https://data.businessquant.com/historic?slug=shares-outstanding&ticker=IOBTQ&period=max&api_key=YOUR_API_KEY");
const data = await res.json();