IO BIOTECH INC (IOBT) Top Institutional Shareholders
IO BIOTECH INC (IOBT) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $179,058 in IOBT holdings during the latest filing period.
Ikarian Capital, Llc is currently the largest disclosed institutional shareholder of IOBT tracked by InsiderSet, reporting ownership valued at approximately $81,391 in its March 31, 2026 SEC Form 13F filing.
The top 10 institutional shareholders tracked on this page collectively account for approximately 99% of the total disclosed IOBT value among the investors covered in this analysis. Major shareholders include Ikarian Capital, Llc, Boothbay Fund Management, Llc, Marshall Wace, Llp, and several other long-term asset managers with concentrated positions in IO BIOTECH INC (IOBT).
This page ranks the largest institutional IOBT shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
12
Total Reported Value
$179,058
Largest Holder
Ikarian Capital, Llc
Largest Position
$81,391
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
25
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Ikarian Capital, Llc | 0.01% | 1,386,565 | $81,391 | — | — | — | |
| Boothbay Fund Management, Llc | 0.00% | 451,852 | $26,524 | — | — | — | |
| Marshall Wace, Llp | 0.00% | 301,291 | $18,077 | — | — | — | |
| Xtx Topco Ltd | 0.00% | 265,792 | $15,602 | — | — | — | |
| Morgan Stanley | 0.00% | 206,215 | $12,105 | — | — | — | |
| Millennium Management Llc | 0.00% | 194,158 | $11,397 | — | — | — | |
| Citigroup Inc | 0.00% | 72,495 | $4,255 | — | — | — | |
| Jane Street Group, Llc | 0.00% | 57,974 | $3,403 | — | — | — | |
| Beacon Pointe Advisors, Llc | 0.00% | 42,600 | $2,501 | — | — | — | |
| Geode Capital Management, Llc | 0.00% | 33,307 | $1,955 | — | — | — | |
| Ubs Group Ag | 0.00% | 30,980 | $1,828 | — | — | — | |
| Gsa Capital Partners Llp | 0.00% | 348,352 | $20 | — | — | — |
Frequently asked questions about IOBT
Who owns the most IOBT stock?
The largest holders of IOBT are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for IO BIOTECH INC (IOBT).
Is IOBT widely held by superinvestors?
Many widely followed stocks like IOBT appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly IOBT is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.