Vault-13

IO BIOTECH INC IOBTQ

COM · Common Stock · CUSIP 449778109

21 institutional holders +2 vs Q1 2024
26,721,87626.7m shares reported held*
$31.3mreported value*
3 new 4 added 4 reduced 1 sold out net sold ≈ $5.9m (-5.1m shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Implied quarter-end price ≈ $1.17. Options: 1 managers hold calls ($1.2m notional), 0 hold puts (—).

Trends to Q2 2024

Institutional holders

Managers reporting a position, each quarter

0102030Q3 22: 22Q4 22: 18Q1 23: 18Q2 23: 16Q3 23: 20Q4 23: 19Q1 24: 19Q2 24: 2121Q3 22Q1 23Q3 23Q1 24Q2 24
Numbers
QuarterHolders
Q3 202222
Q4 202218
Q1 202318
Q2 202316
Q3 202320
Q4 202319
Q1 202419
Q2 202421

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
20020Q4 22: 4 bought or addedQ4 22: 9 cut or sold outQ4 22Q1 23: 4 bought or addedQ1 23: 5 cut or sold outQ2 23: 6 bought or addedQ2 23: 6 cut or sold outQ2 23Q3 23: 12 bought or addedQ3 23: 6 cut or sold outQ4 23: 7 bought or addedQ4 23: 8 cut or sold outQ4 23Q1 24: 7 bought or addedQ1 24: 7 cut or sold outQ2 24: 7 bought or addedQ2 24: 5 cut or sold outQ2 24
Numbers
QuarterBought or addedCut or sold out
Q4 202249
Q1 202345
Q2 202366
Q3 2023126
Q4 202378
Q1 202477
Q2 202475

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$500k$1m$1.5m$2mQ3 23 calls: $1.4mQ3 23 puts: $0Q3 23P/C 0.00Q4 23 calls: $1.9mQ4 23 puts: $0Q4 23P/C 0.00Q1 24 calls: $1.7mQ1 24 puts: $0Q1 24P/C 0.00Q2 24 calls: $1.2mQ2 24 puts: $0Q2 24P/C 0.00
Numbers
QuarterCallsPutsP/C
Q3 2023$1.4m$00.00
Q4 2023$1.9m$00.00
Q1 2024$1.7m$00.00
Q2 2024$1.2m$00.00

Biggest buyers

Logos Global Management LP Added +493,827+493.8k
Soleus Capital Management, L.P. New +192,670+192.7k
CITADEL ADVISORS LLC Added +28,272+28.3k
RENAISSANCE TECHNOLOGIES LLC Added +13,600+13.6k
XTX Topco Ltd Added +10,688+10.7k
Redwood Wealth Management Group, LLC New +4,166+4.2k
UBS Group AG New +3,280+3.3k

Biggest sellers

MORGAN STANLEY Reduced -4,619,359-4.6m
NOVO HOLDINGS A/S Reduced -658,809-658.8k
BANK OF AMERICA CORP /DE/ Reduced -192,670-192.7k
ARMISTICE CAPITAL, LLC Reduced -179,000-179.0k
Stonepine Capital Management, LLC Sold out -156,167-156.2k

Biggest calls

Alyeska Investment Group, L.P. Unchanged $1.2m987.7k shares

Biggest puts

None

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
Lundbeckfond Invest A/S 13D · may seek influence filed 2026-06-02
Stated purposeItem 4 of the Statement is hereby amended and supplemented as follows: On March 31, 2026, the Issuer ceased operations and filed a voluntary petition for relief (the "Petition") under the provisions of Chapter 7 of Title 11 of the United States Code (the "Bankruptcy Code") in the United States Bankruptcy Court for the District of Delaware. The assets of the Issuer will be liquidated and claims paid in accordance with the priorities specified in the Bankruptcy Code. Concurrently with the Petition, on March 31, 2026, each member of the Issuer's board of directors, including Christian Elling, resigned from the Board of Directors of the Issuer and all of its committees. Full filing
27.4% 21.9m 2026-06-02

Fell to 5% or below in the last year: Chernett Jorey (0.0%, 2026-05-20), Point72 Asset Management, L.P. (0.0%, 2026-05-15), HBM Healthcare Investments (Cayman) Ltd. (3.3%, 2026-04-06), Novo Holdings A/S (3.3%, 2026-01-23), Vivo Capital IX, LLC (4.6%, 2025-11-14)

Holders, Q2 2024

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Vivo Capital, LLC 0.67% of their portfolio Palo Alto, CA 6,173,4396.2m $7.2m $7.2m 0.67% Unchanged
2 NOVO HOLDINGS A/S 0.28% of their portfolio HELLERUP, G7 4,429,4494.4m $5.2m $5.2m 0.28% Reduced -658.8k -658,809
3 SAMSARA BIOCAPITAL, LLC 0.89% of their portfolio PALO ALTO, CA 3,640,0153.6m $4.3m $4.3m 0.89% Unchanged
4 PFM Health Sciences, LP 0.15% of their portfolio SAN FRANCISCO, CA 2,341,1072.3m $2.7m $2.7m 0.15% Unchanged
5 MARSHALL WACE, LLP 0.00% of their portfolio LONDON, X0 2,105,2622.1m $2.5m $2.5m 0.00% Unchanged
6 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 1,972,3432.0m $2.3m $2.3m 0.00% Reduced -4.6m -4,619,359
7 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 1,651,5151.7m $1.9m $1.9m 0.00% Reduced -192.7k -192,670
8 ARMISTICE CAPITAL, LLC 0.05% of their portfolio NEW YORK, NY 1,545,0001.5m $1.8m $1.8m 0.05% Reduced -179.0k -179,000
9 Logos Global Management LP 0.07% of their portfolio San Francisco, CA 987,654987.7k $1.2m $1.2m 0.07% Added +493.8k +493,827
10 Pivotal bioVenture Partners Investment Advisor LLC 0.78% of their portfolio SAN FRANCISCO, CA 864,197864.2k $1.0m $1.0m 0.78% Unchanged
11 FMR LLC 0.00% of their portfolio BOSTON, MA 314,600314.6k $368.1k $368.1k 0.00% Unchanged
12 Soleus Capital Management, L.P. 0.02% of their portfolio GREENWICH, CT 192,670192.7k $225.4k $225.4k 0.02% New
13 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 180,800180.8k $211.5k $211.5k 0.00% Added +13.6k +13,600
14 BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.00% of their portfolio HOUSTON, TX 124,623124.6k $145.8k $145.8k 0.00% Unchanged
15 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 86,89486.9k $101.7k $101.7k 0.00% Added +28.3k +28,272
16 Marex Group Ltd 0.00% of their portfolio London, X0 45,00045.0k $52.6k $52.6k 0.00% Unchanged
17 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 33,30733.3k $39.0k $39.0k 0.00% Unchanged
18 XTX Topco Ltd 0.00% of their portfolio LONDON, X0 26,55526.6k $31.1k $31.1k 0.00% Added +10.7k +10,688
19 Redwood Wealth Management Group, LLC 0.00% of their portfolio MEDFORD, NJ 4,1664.2k $4.9k $4.9k 0.00% New
20 UBS Group AG 0.00% of their portfolio ZURICH, V8 3,2803.3k $3.8k $3.8k 0.00% New
21 CONCOURSE FINANCIAL GROUP SECURITIES, INC. 0.00% of their portfolio BIRMINGHAM, AL 00 $0 $0 0.00% Unchanged