Bronte Capital Management Pty Ltd.
In its 13F for Q3 2025 (holdings as of September 30, 2025, filed November 5, 2025), Bronte Capital Management Pty Ltd. reported 29 stock positions worth $1.1 billion. Its top holding was Interactive Brokers Gro Class A (IBKR) at 12.2% of the portfolio, followed by Alphabet Class A (GOOGL, 10.4%) and Regeneron Pharmaceuticals (REGN, 10.2%). Compared with Q2 2025, it opened 3 new positions, sold out of 1 and reduced 26. The biggest buy was a new position in Alnylam Pharmaceuticals (ALNY) and the biggest sale iShares Core S&P Small-Cap E (IJR, shares −83%).
- Most Recent 13F
- Q2 2026
- Location
- Bondi Junction, C3
- CIK
- 0001471085
- Portfolio Value
- $1.1B (Q3 2025)
- SEC Filing
- 0001471085-25-000008 ↗ filed Nov 5, 2025
Holdings Value
Holdings 29 stocks · $1.1B
| IBKR Interactive Brokers Gro Class A | 12.19% | 1,761,171 | $135.4M | Reduce -26.8% |
| GOOGL Alphabet Inc. Class A | 10.45% | 427,139 | $116.0M | Reduce -17.2% |
| REGN Regeneron Pharmaceuticals | 10.20% | 180,283 | $113.3M | Reduce -4.0% |
| BRK.B Berkshire Hathaway Inc. Class B | 8.84% | 174,728 | $98.2M | Reduce -20.7% |
| VISA INC-CLASS A SHARES | 8.10% | 235,851 | $90.0M | Reduce -12.4% |
| PM Philip Morris International | 6.82% | 417,650 | $75.7M | Reduce -22.8% |
| AMZN Amazon.com Inc. | 6.43% | 291,265 | $71.5M | Reduce -25.0% |
| COF Capital One Financial Corp. | 5.65% | 264,109 | $62.7M | Reduce -23.9% |
| IBB iShares Biotechnology ETF | 4.09% | 281,422 | $45.4M | Reduce -4.7% |
| CTVA Corteva Inc. | 3.89% | 571,018 | $43.2M | Reduce -11.9% |
| FCNCA First Citizens Bcshs Class A | 3.71% | 20,620 | $41.2M | Reduce -14.8% |
| VANECK ETF TRUST | 2.36% | 307,213 | $26.2M | Reduce -2.2% |
| PINS Pinterest Inc. Class A | 2.10% | 649,282 | $23.3M | Reduce -32.1% |
| SBH Sally Beauty Holdings Inc. | 1.77% | 1,081,195 | $19.7M | Reduce -15.7% |
| ALNY Alnylam Pharmaceuticals Inc. | 1.61% | 34,974 | $17.8M | New |
| GHC Graham Holdings Co. Class B | 1.59% | 13,397 | $17.6M | Reduce -27.8% |
| VANECK ETF TRUST | 1.50% | 150,866 | $16.7M | Reduce -1.9% |
| SOTERA HEALTH CO | 1.40% | 885,462 | $15.6M | Reduce -2.3% |
| ABVX Abivax SA-ADR | 1.35% | 156,747 | $14.9M | New |
| HLF Herbalife Ltd. | 1.15% | 1,358,989 | $12.8M | Reduce -38.9% |
| IJR iShares Core S&P Small-Cap E | 1.14% | 95,350 | $12.7M | Reduce -82.8% |
| SQM Quimica Y Minera Chil-SP ADR filed as SOCIEDAD QUIMICA Y MINERA DE | 0.71% | 164,587 | $7.9M | Reduce -2.9% |
| B Barrick Mining Corp. | 0.70% | 213,069 | $7.8M | Reduce -6.8% |
| NEM Newmont Corp. | 0.66% | 78,015 | $7.4M | Reduce -6.8% |
| RAMP Liveramp Holdings Inc. | 0.63% | 231,395 | $7.0M | Reduce -17.1% |
| MDLZ Mondelez International Inc. Class A | 0.41% | 65,871 | $4.6M | Reduce -0.7% |
| BBWI Bath & Body Works Inc. | 0.30% | 114,801 | $3.3M | Reduce -10.2% |
| RSKD Riskified Ltd. Class A | 0.24% | 513,696 | $2.7M | Reduce -3.4% |
| ENVX Enovix Corp. | 0.01% | 11,550 | $115K | New |
Options reported separately and not counted above: IWO calls ($6.0M).
Portfolio Sells Q2 2025 → Q3 2025
| IJR iShares Core S&P Small-Cap E | Reduce -82.8% | 1.14% | −3.97 |
| PM Philip Morris International | Reduce -22.8% | 6.82% | −1.92 |
| AMZN Amazon.com Inc. | Reduce -25.0% | 6.43% | −1.10 |
| PINS Pinterest Inc. Class A | Reduce -32.1% | 2.10% | −0.93 |
| COF Capital One Financial Corp. | Reduce -23.9% | 5.65% | −0.88 |
| BRK.B Berkshire Hathaway Inc. Class B | Reduce -20.7% | 8.84% | −0.65 |
| HLF Herbalife Ltd. | Reduce -38.9% | 1.15% | −0.54 |
| FCNCA First Citizens Bcshs Class A | Reduce -14.8% | 3.71% | −0.48 |
| CTVA Corteva Inc. | Reduce -11.9% | 3.89% | −0.39 |
| VISA INC-CLASS A SHARES | Reduce -12.4% | 8.10% | −0.36 |
| RAMP Liveramp Holdings Inc. | Reduce -17.1% | 0.63% | −0.18 |
| GB Global Blue Group Holding AG | Sold out | 0.00% | −0.07 |
| BBWI Bath & Body Works Inc. | Reduce -10.2% | 0.30% | −0.04 |
| RSKD Riskified Ltd. Class A | Reduce -3.4% | 0.24% | +0.01 |
| MDLZ Mondelez International Inc. Class A | Reduce -0.7% | 0.41% | +0.02 |
| GHC Graham Holdings Co. Class B | Reduce -27.8% | 1.59% | +0.03 |
| SQM Quimica Y Minera Chil-SP ADR | Reduce -2.9% | 0.71% | +0.18 |
| NEM Newmont Corp. | Reduce -6.8% | 0.66% | +0.23 |
| B Barrick Mining Corp. | Reduce -6.8% | 0.70% | +0.28 |
| IBKR Interactive Brokers Gro Class A | Reduce -26.8% | 12.19% | +0.40 |
| SOTERA HEALTH CO | Reduce -2.3% | 1.40% | +0.51 |
| VANECK ETF TRUST | Reduce -1.9% | 1.50% | +0.59 |
| SBH Sally Beauty Holdings Inc. | Reduce -15.7% | 1.77% | +0.72 |
| IBB iShares Biotechnology ETF | Reduce -4.7% | 4.09% | +0.78 |
| VANECK ETF TRUST | Reduce -2.2% | 2.36% | +0.92 |
| REGN Regeneron Pharmaceuticals | Reduce -4.0% | 10.20% | +1.47 |
| GOOGL Alphabet Inc. Class A | Reduce -17.2% | 10.45% | +2.40 |
Portfolio Buys Q2 2025 → Q3 2025
Options Activity Q2 2025 → Q3 2025
| IWO iShares Russell 2000 Growth | call | New | 18,700 | $6.0M |
Calls and puts are listed by the shares they cover; their value is not part of the stock holdings above.
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 56 | $888.3M | GOOGL, REGN, IBKR, VISA INC-CLASS A SHARES, BRK.B |
| Q1 2026 | 51 | $940.9M | REGN, GOOGL, IBKR, BRK.B, VISA INC-CLASS A SHARES |
| Q4 2025 | 43 | $956.8M | REGN, GOOGL, IBKR, VISA INC-CLASS A SHARES, BRK.B |
| Q3 2025 | 29 | $1.1B | IBKR, GOOGL, REGN, BRK.B, VISA INC-CLASS A SHARES |
| Q2 2025 | 27 | $1.3B | IBKR, BRK.B, PM, REGN, VISA INC-CLASS A SHARES |
| Q1 2025 | 26 | $1.2B | IJR, BRK.B, REGN, IBKR, PM |
| Q4 2024 | 24 | $1.3B | IJR, REGN, IBKR, GOOGL, BRK.B |
| Q3 2024 | 25 | $1.2B | BRK.B, GOOGL, REGN, IBKR, IJR |
| Q2 2024 | 28 | $1.3B | GOOGL, REGN, BRK.B, IBKR, IJR |
| Q1 2024 | 29 | $1.2B | GOOGL, BRK.B, REGN, IBKR, VISA INC-CLASS A SHARES |