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The Oncology Institute
TOI

79 hedge funds and large institutions have $65.5M invested in The Oncology Institute in 2025 Q2 according to their latest regulatory filings, with 42 funds opening new positions, 24 increasing their positions, 4 reducing their positions, and 6 closing their positions.

New
Increased
Maintained
Reduced
Closed

600% more first-time investments, than exits

New positions opened: 42 | Existing positions closed: 6

500% more repeat investments, than reductions

Existing positions increased: 24 | Existing positions reduced: 4

237% more capital invested

Capital invested by funds: $19.4M → $65.5M (+$46M)

84% more funds holding

Funds holding: 43 → 79 (+36)

50% more funds holding in top 10

Funds holding in top 10: 2 → 3 (+1)

12.24% more ownership

Funds ownership: 22.51% → 34.75% (+12%)

Holders
79
Holders Change
+36
Holders Change %
+83.72%
% of All Funds
1.04%
Holding in Top 10
3
Holding in Top 10 Change
+1
Holding in Top 10 Change %
+50%
% of All Funds
0.04%
New
42
Increased
24
Reduced
4
Closed
6
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
BlackRock
BlackRock
New York
+$7.61M
2
Vanguard Group
Vanguard Group
Pennsylvania
+$6.33M
3
Marshall Wace
Marshall Wace
United Kingdom
+$3.69M
4
WC
Wexford Capital
Florida
+$2.8M
5
Geode Capital Management
Geode Capital Management
Massachusetts
+$2.23M

Top Sellers

Rank Fund Capital Flow
1
CI
Cincinnati Insurance
Ohio
-$1.41M
2
FL
FreeGulliver LLC
Louisiana
-$501K
3
MHP
Manatuck Hill Partners
Connecticut
-$251K
4
QFA
Quattro Financial Advisors
Texas
-$186K
5
GCP
GSA Capital Partners
United Kingdom
-$33K
Name Holding Trade Value Shares
Change 		Change in
Stake
Vanguard Group
1
Vanguard Group
Pennsylvania
$8.78M +$6.33M +2,530,173 +145%
TAS
2
TIFF Advisory Services
Pennsylvania
$7.45M +$1.64M +655,324 +22%
DM
3
Deerfield Management
New York
$6.89M – – –
BlackRock
4
BlackRock
New York
$6.78M +$7.61M +3,044,554 +1,160%
Balyasny Asset Management
5
Balyasny Asset Management
Illinois
$5.16M +$928K +371,005 +17%
JAIC
6
Josh Arnold Investment Consultant
Minnesota
$5.02M +$1.14M +457,650 +23%
Marshall Wace
7
Marshall Wace
United Kingdom
$3.03M +$3.69M +1,476,946 New
Geode Capital Management
8
Geode Capital Management
Massachusetts
$2.62M +$2.23M +893,696 +232%
WC
9
Wexford Capital
Florida
$2.29M +$2.8M +1,118,679 New
CP
10
CenterBook Partners
Connecticut
$1.47M +$1.79M +715,899 New
State Street
11
State Street
Massachusetts
$1.32M +$1.36M +544,957 +538%
BRF
12
B. Riley Financial
California
$947K +$780K +312,000 +208%
Renaissance Technologies
13
Renaissance Technologies
New York
$938K +$525K +209,900 +85%
UBS Group
14
UBS Group
Switzerland
$862K +$1.03M +410,296 +4,072%
Northern Trust
15
Northern Trust
Illinois
$843K +$836K +334,364 +434%
Millennium Management
16
Millennium Management
New York
$830K +$1.01M +405,009 New
MCM
17
Massar Capital Management
Connecticut
$820K +$750K +300,000 +300%
FCM
18
FourWorld Capital Management
New York
$803K +$337K +134,650 +52%
FL
19
FreeGulliver LLC
Louisiana
$705K -$501K -200,561 -37%
Two Sigma Investments
20
Two Sigma Investments
New York
$570K +$695K +278,165 New
MHP
21
Manatuck Hill Partners
Connecticut
$512K -$251K -100,200 -29%
Bank of New York Mellon
22
Bank of New York Mellon
New York
$510K +$309K +123,505 +99%
PCM
23
Portolan Capital Management
Massachusetts
$454K +$554K +221,512 New
EI
24
EAM Investors
California
$401K +$490K +195,837 New
Morgan Stanley
25
Morgan Stanley
New York
$360K +$362K +144,885 +475%
1
2 3 4

TOI Hedge Fund Activity: Q2 2025 in Review

79 of the 7,596 institutional investors tracked by Wall St. Rank reported a position in The Oncology Institute (TOI) for Q2 2025, worth a combined $65.5M — up 237% from $19.4M a quarter earlier.

Buyers outnumbered sellers: 42 funds opened new TOI positions and 6 closed out — a net gain of 36 holders — while 24 added to existing stakes and 4 trimmed.

The largest buyer was BlackRock, adding an estimated $7.61M. The largest seller was Cincinnati Insurance, exiting entirely with an estimated $1.41M sold.

  • 79 institutional investors held The Oncology Institute (TOI) as of Q2 2025, up from 43 in Q1 2025.
  • Funds reported $65.5M of The Oncology Institute stock for Q2 2025, up 237% quarter-over-quarter.
  • 42 funds opened new The Oncology Institute positions in Q2 2025 and 6 closed out, a net change of +36 holders.
  • The largest The Oncology Institute buyer in Q2 2025 was BlackRock, an estimated $7.61M added.
  • The largest The Oncology Institute seller in Q2 2025 was Cincinnati Insurance, an estimated $1.41M sold.

Based on aggregated 13F filings for Q2 2025.