IO Biotech Ownership | Who Owns IO Biotech?

IO Biotech Ownership Summary

IO Biotech is owned by 27.60% institutional investors, 0.36% insiders, and 72.04% retail investors. Vivo capital is the largest institutional shareholder, holding 9.37% of IOBT shares. HBM Healthcare Investments AG Ord is the top mutual fund, with 5.99% of its assets in IO Biotech shares.

IOBT Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	IO Biotech	27.60%	0.36%	72.04%
Sector	Healthcare Stocks	492.67%	11.09%	-403.76%
Industry	Biotech Stocks	295.31%	11.22%	-206.53%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Vivo capital	6.17M	9.37%	$8.58M
Novo	3.35M	5.09%	$4.66M
Marshall wace, llp	2.11M	3.20%	$2.93M
Morgan stanley	1.97M	2.99%	$2.31M
Pfm health sciences, lp	1.97M	2.99%	$2.74M
Bank of america corp /de/	1.65M	2.51%	$1.93M
Alyeska investment group	987.65K	1.50%	$1.16M
Pivotal bioventure partners investment advisor	864.20K	1.31%	$1.20M
Landscape capital management	442.20K	0.67%	$406.82K
Soleus capital management	192.67K	0.29%	$267.81K

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Vivo capital	6.17M	0.88%	$8.58M
Pivotal bioventure partners investment advisor	864.20K	0.74%	$1.20M
Novo	3.35M	0.33%	$4.66M
Pfm health sciences, lp	1.97M	0.24%	$2.74M
Sectoral asset management	117.69K	0.11%	$163.59K
Landscape capital management	442.20K	0.04%	$406.82K
Soleus capital management	192.67K	0.02%	$267.81K
Alyeska investment group	987.65K	0.01%	$1.16M
Bridgeway capital management	174.00K	0.00%	$160.08K
Marshall wace, llp	2.11M	0.00%	$2.93M

Top Buyers

Holder	Shares	% Assets	Change
Landscape capital management	442.20K	0.04%	442.20K
Royal bank of canada	60.00K	-	60.00K
Citadel advisors	86.89K	-	28.27K
Hilton capital management	25.51K	0.00%	25.51K
Newedge advisors	24.22K	0.00%	24.22K

Top Sellers

Holder	Shares	% Assets	Change
Samsara biocapital	-	-	-3.64M
Armistice capital	-	-	-1.54M
Logos global management lp	-	-	-493.83K
Pfm health sciences, lp	1.97M	0.24%	-369.03K
Fmr	-	-	-314.60K

New Positions

Holder	Shares	% Assets	Change	Value
Landscape capital management	442.20K	0.04%	442.20K	$406.82K
Royal bank of canada	60.00K	-	60.00K	$55.00K
Hilton capital management	25.51K	0.00%	25.51K	$9.26K
Newedge advisors	24.22K	0.00%	24.22K	$33.66K
Jane street group	23.72K	-	23.72K	$25.85K

Sold Out

Holder	Change
Advisor group	-230.00
Redwood wealth management group	-4.17K
Hrt financial lp	-12.69K
Virtu financial	-17.95K
Wealth enhancement advisory services	-20.00K

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2025	26	23.81%	18,182,707	-4.64%	27	3.29%	11	175.00%	8	-
Mar 31, 2025	1	-96.15%	23,717	-99.88%	-	0.00%	1	-92.31%	-	-100.00%
Dec 31, 2024	12	-36.84%	9,874,693	-58.14%	14	1.17%	7	-12.50%	-	-100.00%
Sep 30, 2024	18	-10.00%	23,573,928	-9.96%	35	2.27%	7	16.67%	2	-50.00%
Jun 30, 2024	20	11.11%	26,183,049	-4.24%	39	1.01%	6	20.00%	4	-20.00%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
HBM Healthcare Investments AG Ord	3.94M	5.99%	-
MEDICAL BioHealth EUR Acc	679.10K	1.03%	7.40K
Fidelity Select Biotechnology	314.60K	0.48%	-
Protea Sectoral Biotech Opps IF USD Acc	91.44K	0.14%	-
Bridgeway Ultra-Small Company Market	75.00K	0.11%	-
Fidelity Nasdaq Composite Index	33.31K	0.05%	-

Recent Insider Transactions

Date	Name	Role	Activity	Value
May 30, 2025	Hunter Heidi	-	Buy	$20.88K
Dec 23, 2024	Ahmad Qasim Iftikhar	Chief Medical Officer	Buy	$26.55K
Dec 23, 2024	Zocca Mai-Britt	Chief Executive Officer	Buy	$10.12K
Dec 23, 2024	Sullivan Amy	Chief Financial Officer	Buy	$8.48K
Dec 23, 2024	Smith Devin Whittemore	General Counsel	Buy	$9.72K

Insider Transactions Trends

Date	Buy	Sell
2025 Q2	1	-
2024 Q4	4	-
2024 Q3	-	2
2024 Q2	-	1
2024 Q1	-	1

IOBT Ownership FAQ

Who Owns IO Biotech?

IO Biotech shareholders are primarily institutional investors at 27.60%, followed by 0.36% insiders and 72.04% retail investors. The average institutional ownership in IO Biotech's industry, Biotech Stocks , is 295.31%, which IO Biotech falls below.

Who owns the most shares of IO Biotech?

IO Biotech’s largest shareholders are Vivo capital (6.17M shares, 9.37%), Novo (3.35M shares, 5.09%), and Marshall wace, llp (2.11M shares, 3.20%). Together, they hold 17.66% of IO Biotech’s total shares outstanding.

Does Blackrock own IO Biotech?

BlackRock is not among the top 10 institutional shareholders of IO Biotech.

Who is IO Biotech’s biggest shareholder by percentage of total assets invested?

Vivo capital is IO Biotech’s biggest shareholder by percentage of total assets invested, with 0.88% of its assets in 6.17M IO Biotech shares, valued at 8.58M$.

Who is the top mutual fund holder of IO Biotech shares?

HBM Healthcare Investments AG Ord is the top mutual fund holder of IO Biotech shares, with 5.99% of its total shares outstanding invested in 3.94M IO Biotech shares.

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