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Phathom Pharmaceuticals

171 hedge funds and large institutions have $1.03B invested in Phathom Pharmaceuticals in 2025 Q4 according to their latest regulatory filings, with 48 funds opening new positions, 49 increasing their positions, 50 reducing their positions, and 11 closing their positions.

New
Increased
Maintained
Reduced
Closed

more call options, than puts

Call options by funds: $ | Put options by funds: $

more first-time investments, than exits

New positions opened: | Existing positions closed:

more capital invested

Capital invested by funds: $ → $

more funds holding in top 10

Funds holding in top 10:

28% more funds holding

Funds holding: 134171 (+37)

0.8% less ownership

Funds ownership: 87.88%87.07% (-0.8%)

2% less repeat investments, than reductions

Existing positions increased: 49 | Existing positions reduced: 50

Holders
171
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
8
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$17.8M
Puts
$1.18M
Net Calls
Net Calls Change

Top Buyers

1 +$9.46M
2 +$5.64M
3 +$5.62M
4
Jane Street
Jane Street
New York
+$3.96M
5
CP
Catalys Pacific
Japan
+$3.74M

Top Sellers

1 -$42.8M
2 -$6.13M
3 -$5.27M
4
ACM
AIGH Capital Management
Maryland
-$5.05M
5
Walleye Capital
Walleye Capital
New York
-$3.42M