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BCM

Bronte Capital Management Portfolio holdings

AUM $1.01B
1-Year Est. Return 47.99%
This Fund
S&P 500
This Quarter Est. Return
+23.57%
1 Year Est. Return
+47.99%
3 Year Est. Return
+112.22%
5 Year Est. Return
+138.3%
10 Year Est. Return
–
AUM
$1.12B
AUM Growth
-$156M
Cap. Flow
-$229M
Cap. Flow %
-20.51%
Top 10 Hldgs %
76.24%
Holding
31
New
4
Increased
–
Reduced
26
Closed
1

Top Buys

Rank Stock Value
1
ALNY icon
Alnylam Pharmaceuticals
ALNY
+$14.2M
2
ABVX
Abivax
ABVX
+$9.61M
3
ENVX icon
Enovix
ENVX
+$128K

Top Sells

Rank Stock Value
1
IJR icon
iShares Core S&P Small-Cap ETF
IJR
+$53M
2
IBKR icon
Interactive Brokers
IBKR
+$40.5M
3
BRK.B icon
Berkshire Hathaway Class B
BRK.B
+$22.1M
4
AMZN icon
Amazon
AMZN
+$21.9M
5
PM icon
Philip Morris
PM
+$20.8M

Sector Composition

Rank Sector Weight
1 Financials 30.23%
2 Healthcare 13.08%
3 Communication Services 12.48%
4 Consumer Discretionary 8.46%
5 Consumer Staples 8.34%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
ENVX icon
26
Enovix
ENVX
$803M
$115K 0.01%
+11,550
New +$128K
GB
27
DELISTED
Global Blue Group Holding
GB
– –
-100,917
Closed -$852K
1
2

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Bronte Capital Management's Q3 2025 Portfolio in Review

As of Q3 2025, Bronte Capital Management held 31 positions worth $1.12B, down 12% from $1.27B the previous quarter. Its ten largest holdings account for 76% of the portfolio.

Bronte Capital Management withdrew a net $229M in Q3 2025, closing 1 position and reducing 26 holdings. Its most notable exit was Global Blue Group Holding, an estimated $852K position sold in full.

By sector, the portfolio is most concentrated in Financials at 30% of assets, down from 32% a quarter earlier, followed by Healthcare and Communication Services.

Against the trend, Bronte Capital Management opened a new position in Alnylam Pharmaceuticals worth $17.8M.

  • Bronte Capital Management's largest Q3 2025 buy was Alnylam Pharmaceuticals: 34,974 shares worth $17.8M.
  • Bronte Capital Management's biggest Q3 2025 reduction was iShares Core S&P Small-Cap ETF, cutting an estimated $53M.
  • Bronte Capital Management fully exited Global Blue Group Holding in Q3 2025, selling an estimated $852K.
  • Bronte Capital Management's ten largest holdings make up 76% of its $1.12B portfolio in Q3 2025.
  • Bronte Capital Management opened 4 new positions and closed 1 in Q3 2025.
  • Bronte Capital Management's portfolio value fell 12% quarter-over-quarter to $1.12B.

Based on Bronte Capital Management's 13F filing for Q3 2025, filed 5 Nov 2025.