Matrix Capital Management Company, LP
Long book
$46.3M
Q1 2026
Positions
1
Top-10 weight
100%
concentration
Last quarter
+15.7%
SPY +14.8%
Turnover
50%
of book per quarter
Strategy in plain words
auto-generated from filingsMatrix Capital Management Company, LP is a concentrated fundamental stock-picker, specialised in healthcare (100% of the long book), running a $46.3M US long book across 1 positions.
The portfolio is extremely concentrated — the top 10 positions are almost the whole book. The portfolio is actively managed, with meaningful quarterly turnover. Current anchor positions: AURA BIOSCIENCES INC.
Over the last 9 quarters its long book ran on average 0.4pp per quarter ahead of the S&P 500, beating the index in 5 of 9 quarters. We rate its filings as signal-bearing: position changes reflect genuine views.
Implied long-book return vs S&P 500
methodology: positions priced quarterly, no shorts/options Fund long book S&P 500
Q1 2024
+9.7%
Q2 2024
-4.5%
Q3 2024
+1.9%
Q4 2024
-17.6%
Q1 2025
+2.6%
Q2 2025
+13.5%
Q3 2025
+17.2%
Q4 2025
+5.3%
Q1 2026
+15.7%
Sector allocation
Healthcare 100%
Long book by quarter
What does Matrix Capital own?
Q1 2026 13F| Company | Sector | Shares | Value | % of book | Change |
|---|---|---|---|---|---|
| AURA AURA BIOSCIENCES INC | Healthcare | 6.9M | $46.3M | 100.0% | Held |
13F filing history
| Period | Form | Filed | Entries | Reported value | Flags | Source |
|---|---|---|---|---|---|---|
| Q1 2026 | 13F-HR | May 14, 2026 | 1 | $46.3M | canonical | SEC ↗ |
| Q4 2025 | 13F-HR | Feb 13, 2026 | 2 | $57.6M | canonical | SEC ↗ |
| Q3 2025 | 13F-HR | Nov 13, 2025 | 3 | $106.7M | canonical | SEC ↗ |
| Q2 2025 | 13F-HR | Aug 14, 2025 | 4 | $222.8M | canonical | SEC ↗ |
| Q1 2025 | 13F-HR | May 14, 2025 | 4 | $347.2M | canonical | SEC ↗ |
| Q4 2024 | 13F-HR | Feb 13, 2025 | 5 | $2.15B | canonical | SEC ↗ |
| Q3 2024 | 13F-HR | Nov 14, 2024 | 7 | $2.09B | canonical | SEC ↗ |
| Q2 2024 | 13F-HR | Aug 14, 2024 | 23 | $13.14B | canonical | SEC ↗ |
| Q1 2024 | 13F-HR | May 14, 2024 | 23 | $10.77B | canonical | SEC ↗ |