IO Biotech, Inc.
IO Biotech, Inc. (IOBT) Insider Trading
Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.
SEC EDGAR · FMP · IOBT · as of Jun 9, 2026
Activity summary
Buy transactions
5
P-Purchase only
Sell transactions
3
12 Months
Buy/Sell ratio
1.67
Buy/Sell (by trades)
Overall sentiment
IO Biotech, Inc. insiders have been net buyers of shares over the past 12 Months, which may signal confidence in the company's outlook.
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only
As of Jun 9, 2026
IOBT insider buying and selling by quarter
IOBT insider selling · IOBT insider buying stocks · quarterly insider activity
Mobile shows last 4Q · Desktop shows full 8Q
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters
As of Jun 9, 2026
Recent insider transactions
IOBT executive sell shares · IOBT board member insider trading · IOBT insider trading SEC filing
Scroll horizontally to see all columns
| Date | Insider | Type | Shares | Value | Filing |
|---|---|---|---|---|---|
| May 30, 2025 | Hunter Heidi Director | Purchase | 15,000 | $21K | Form 4 |
| Dec 23, 2024 | Ahmad Qasim Iftikhar Chief Medical Officer | Purchase | 31,350 | $27K | Form 4 |
| Dec 23, 2024 | Zocca Mai-Britt CEO · Director | Purchase | 12,500 | $10K | Form 4 |
| Dec 23, 2024 | Sullivan Amy CFO | Purchase | 10,250 | $8K | Form 4 |
| Dec 23, 2024 | Smith Devin Whittemore General Counsel | Purchase | 12,000 | $10K | Form 4 |
| Nov 22, 2023 | Burkavage Brian CAO | Purchase | 5,000 | $5K | Form 4 |
| Nov 21, 2023 | Burkavage Brian CAO | Purchase | 5,000 | $5K | Form 4 |
| Aug 9, 2023 | Elling Christian E Director | Award | 7,901,234 | $15.01M⚡ | Form 4 |
| Aug 9, 2023 | Lundbeckfond Invest A/S Director | Award | 7,901,234 | $15.01M⚡ | Form 4 |
| Aug 9, 2023 | Novo Holdings A/S 10 percent owner | Purchase | 2,469,135 | $5.00M⚡ | Form 4 |
| Aug 9, 2023 | Vivo Capital IX, LLC 10 percent owner | Purchase | 3,157,894 | $6.00M⚡ | Form 4 |
| Aug 9, 2023 | Zocca Mai-Britt CEO · Director | Award | 37,037 | $70K | Form 4 |
| Aug 9, 2023 | Sullivan Amy CFO | Award | 49,382 | $94K | Form 4 |
| Aug 9, 2023 | Smith Devin Whittemore General Counsel | Award | 4,938 | $9K | Form 4 |
| Mar 17, 2023 | Sullivan Amy CFO | Purchase | 25,000 | $58K | Form 4 |
| Nov 9, 2021 | HBM Healthcare Investments (Cayman) Ltd. 10 percent owner | Purchase | 325,000 | $4.55M⚡ | Form 4 |
| Nov 9, 2021 | HBM Healthcare Investments (Cayman) Ltd. 10 percent owner | Other | 2,365,545 | — | Form 4 |
| Nov 9, 2021 | Malier Vanessa Director | Purchase | 162,500 | $2.27M⚡ | Form 4 |
| Nov 9, 2021 | Malier Vanessa Director | Other | 796,059 | — | Form 4 |
| Nov 9, 2021 | Malier Vanessa Director | Purchase | 162,500 | $2.27M⚡ | Form 4 |
| Nov 9, 2021 | Malier Vanessa Director | Other | 267,977 | — | Form 4 |
| Nov 9, 2021 | Vivo Capital IX, LLC 10 percent owner | Purchase | 650,000 | $9.10M⚡ | Form 4 |
| Nov 9, 2021 | Vivo Capital IX, LLC 10 percent owner | Other | 2,365,545 | — | Form 4 |
| Nov 9, 2021 | Andersson Claus A. Director | Purchase | 75,000 | $1.05M⚡ | Form 4 |
| Nov 9, 2021 | Andersson Claus A. Director | Other | 354,830 | — | Form 4 |
Ahmad Qasim Iftikhar
Chief Medical Officer
Date
Dec 23
Shares
31,350
Price
$0.85
Value
$27K
Zocca Mai-Britt
CEO · Director
Date
Dec 23
Shares
12,500
Price
$0.81
Value
$10K
Smith Devin Whittemore
General Counsel
Date
Dec 23
Shares
12,000
Price
$0.81
Value
$10K
Elling Christian E
Director
Date
Aug 9
Shares
7,901,234
Price
$1.90
Value
$15.01M ⚡
Lundbeckfond Invest A/S
Director
Date
Aug 9
Shares
7,901,234
Price
$1.90
Value
$15.01M ⚡
Novo Holdings A/S
10 percent owner
Date
Aug 9
Shares
2,469,135
Price
$2.02
Value
$5.00M ⚡
Vivo Capital IX, LLC
10 percent owner
Date
Aug 9
Shares
3,157,894
Price
$1.90
Value
$6.00M ⚡
Smith Devin Whittemore
General Counsel
Date
Aug 9
Shares
4,938
Price
$1.90
Value
$9K
HBM Healthcare Investments (Cayman) Ltd.
10 percent owner
Date
Nov 9
Shares
325,000
Price
$14.00
Value
$4.55M ⚡
HBM Healthcare Investments (Cayman) Ltd.
10 percent owner
Date
Nov 9
Shares
2,365,545
Price
—
Value
—
Vivo Capital IX, LLC
10 percent owner
Date
Nov 9
Shares
650,000
Price
$14.00
Value
$9.10M ⚡
Andersson Claus A.
Director
Date
Nov 9
Shares
75,000
Price
$14.00
Value
$1.05M ⚡
⚡ = value ≥ $1M · Award/Option price shows — · formType=4 · securityName=Common Stock · url → sec.gov/Archives/edgar
▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —
About IOBT insider trading
IOBT insider trades
IO Biotech, Inc. (IOBT) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including IOBT. Over the past 12 months, 0 insiders have filed transactions with the SEC. IOBT insiders have been primarily buying, which may reflect pre-scheduled Rule 10b5-1 plan executions.
For IO Biotech, Inc.'s institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →
Frequently asked questions
IOBT insider trading · 5 questionsThe insiders of IO Biotech, Inc. (IOBT) include executives and directors such as IOBT, among others. Over the past 12 months, 0 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.
▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 9, 2026