INVESTOR AB
Long book
$15.12B
Q1 2026
Positions
10
Top-10 weight
100%
concentration
Last quarter
-0.7%
SPY +14.8%
Turnover
63%
of book per quarter
Strategy in plain words
auto-generated from filingsINVESTOR AB is a concentrated fundamental stock-picker, specialised in healthcare (67% of the long book), running a $15.12B US long book across 10 positions.
The portfolio is extremely concentrated — the top 10 positions are almost the whole book. Turnover is high — positions rotate quickly, so individual names matter less than the process. Current anchor positions: ASTRAZENECA PLC, NASDAQ INC, MEDIWOUND LTD, CELLEBRITE DI LTD, COHERENT CORP.
Over the last 9 quarters its long book ran on average 0.4pp per quarter behind 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
-4.1%
Q2 2024
+21.5%
Q3 2024
+6.2%
Q4 2024
-1.6%
Q1 2025
+18.3%
Q2 2025
-0.8%
Q3 2025
+10.1%
Q4 2025
-12.3%
Q1 2026
-0.7%
Sector allocation
Healthcare 67%
Financials 33%
Materials 0%
Technology 0%
Communications 0%
Other 0%
Industrials 0%
Long book by quarter
What does INVESTOR AB own?
Q1 2026 13F| Company | Sector | Shares | Value | % of book | Change |
|---|---|---|---|---|---|
| AZN ASTRAZENECA PLC | Healthcare | 51.6M | $10.17B | 67.3% | New |
| NDAQ NASDAQ INC | Financials | 58.4M | $4.93B | 32.6% | +0.3% |
| MDWD MEDIWOUND LTD | Materials | 872.1K | $14.0M | 0.1% | Held |
| CLBT CELLEBRITE DI LTD | Technology | 55.0K | $758K | 0.0% | New |
| COHR COHERENT CORP | Other | 3.0K | $715K | 0.0% | -50.0% |
| KYIV KYIVSTAR GROUP LTD | Communications | 59.4K | $601K | 0.0% | New |
| VZ VERIZON COMMUNICATIONS INC | Communications | 11.3K | $567K | 0.0% | New |
| CRSR CORSAIR GAMING INC | Technology | 99.7K | $553K | 0.0% | -20.0% |
| WHR WHIRLPOOL CORP | Industrials | 4.7K | $253K | 0.0% | +27.0% |
| BMRN BIOMARIN PHARMACEUTICAL INC | Healthcare | 3.7K | $209K | 0.0% | Held |
13F filing history
| Period | Form | Filed | Entries | Reported value | Flags | Source |
|---|---|---|---|---|---|---|
| Q1 2026 | 13F-HR | May 15, 2026 | 10 | $15.12B | canonical | SEC ↗ |
| Q4 2025 | 13F-HR | Feb 17, 2026 | 12 | $5.67B | canonical | SEC ↗ |
| Q3 2025 | 13F-HR | Nov 14, 2025 | 12 | $5.17B | canonical | SEC ↗ |
| Q2 2025 | 13F-HR | Aug 14, 2025 | 13 | $5.23B | canonical | SEC ↗ |
| Q1 2025 | 13F-HR | May 15, 2025 | 13 | $4.43B | canonical | SEC ↗ |
| Q4 2024 | 13F-HR | Feb 14, 2025 | 8 | $4.52B | canonical | SEC ↗ |
| Q3 2024 | 13F-HR | Nov 14, 2024 | 7 | $4.27B | canonical | SEC ↗ |
| Q2 2024 | 13F-HR | Aug 14, 2024 | 6 | $3.51B | canonical | SEC ↗ |
| Q1 2024 | 13F-HR | May 15, 2024 | 10 | $3.68B | canonical | SEC ↗ |