Arkolith/Funds/Investor AB

Investor AB

CIK 889232Holding company
Holdings as of Mar 31, 2026·disclosed May 15, 2026·~45-day 13F lag·13F-HR
Active Filer

Investor AB holds a concentrated book of 10 stocks worth $15.1B as of Q1 2026 (disclosed May 15, 2026, a ~45-day 13F lag). The SEC 13F shows only Investor AB's US-listed positions. Its main portfolio is mostly Stockholm-listed and does not appear in this book. This quarter they opened AstraZeneca PLC and trimmed Coherent Corp. Their largest long position is AstraZeneca PLC at 67% of the equity book.

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Use Arkolith to show INVESTOR AB's latest
holdings, largest changes, and filing provenance.
Opened
4
new positions
Added to
2
existing
Trimmed
2
reduced
Sold out
5
exited

Concentration

Top-heavy: concentrated book

Top 5 holdings
100%
Top 10 holdings
100%
Top 20 holdings
100%

Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.

Direct sector allocation

100% mapped to company sectors

Health Care
67%
Financials
33%
Information Technology
0%
Communication Services
0%

Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.

Biggest moves: latest quarter

Estimated $ traded · quarter-end prices, no cost basis

Bought
Trimmed / exited

Holdings: largest first

Bars show each stock's share of the portfolio. Click a row for its position history.

10 positions
#SecurityValueShares% PortLast moveHistory
1AstraZeneca PLC
ORD
$10.2B51.59M
67.3%
▲New
New position
2Nasdaq Inc
COM
$4.9B58.38M
32.6%
▲+0.3%
Added · +200K sh
3Mediwound Ltd
SHS NEW
$14.0M872.1K
0.1%
—Held
4Cellebrite Di Ltd
ORDINARY SHARES
$758K55.0K
0.0%
▲New
New position
5Coherent Corp
COM
$715K3.0K
0.0%
▼−50%
Reduced · −3K sh
6Kyivstar Group Ltd
ORD SHS
$601K59.4K
0.0%
▲New
New position
7Verizon Communications Inc
COM
$567K11.3K
0.0%
▲New
New position
8Corsair Gaming Inc
COM
$553K99.7K
0.0%
▼−20%
Reduced · −25K sh
9Whirlpool Corp
COM
$253K4.7K
0.0%
▲+27%
Added · +1K sh
10Biomarin Pharmaceutical Inc
COM
$209K3.7K
0.0%
—Held
Showing all 10 positions

Filing history

As-of date vs the date the SEC received each filing

QuarterAs ofFiledPositionsValueForm
Q1 2026Mar 31, 2026May 15, 202610$15.1B13F-HR
Q4 2025Dec 31, 2025Feb 17, 202612$5.7B13F-HR
Q3 2025Sep 30, 2025Nov 14, 202512$5.2B13F-HR
Q2 2025Jun 30, 2025Aug 14, 202513$5.2B13F-HR
Q1 2025Mar 31, 2025May 15, 202513$4.4B13F-HR
Q4 2024Dec 31, 2024Feb 14, 20258$4.5B13F-HR
Q3 2024Sep 30, 2024Nov 14, 20247$4.3B13F-HR
Q2 2024Jun 30, 2024Aug 14, 20246$3.5B13F-HR
Q1 2024Mar 31, 2024May 15, 202410$3.7B13F-HR
Q4 2023Dec 31, 2023Feb 14, 202410$3.4B13F-HR
Q3 2023Sep 30, 2023Nov 14, 20239$2.8B13F-HR
Q2 2023Jun 30, 2023Aug 14, 20239$2.9B13F-HR
Q1 2023Mar 31, 2023May 15, 20237$3.2B13F-HR
Q4 2022Dec 31, 2022Feb 14, 20235$3.6B13F-HR
Q3 2022Sep 30, 2022Nov 14, 20227$3.3B13F-HR
Q2 2022Jun 30, 2022Aug 15, 20225$3.0B13F-HR
Q1 2022Mar 31, 2022May 16, 20228$3.5B13F-HR
Q4 2021Dec 31, 2021Feb 14, 20227$4.1B13F-HR
Q3 2021Sep 30, 2021Nov 15, 20214$3.7B13F-HR
Q2 2021Jun 30, 2021Aug 16, 20213$3.4B13F-HR
Q1 2021Mar 31, 2021May 17, 20212$2.9B13F-HR
Q4 2020Dec 31, 2020Feb 16, 20213$2.6B13F-HR
Q3 2020Sep 30, 2020Nov 16, 20207$2.4B13F-HR
Q2 2020Jun 30, 2020Aug 14, 20204$2.3B13F-HR

Data source

Holdings from SEC EDGAR 13F-HR filings, updated quarterly ~45 days after quarter-end. Public domain. The book and weighting are long equity only; disclosed put/call options are listed separately and excluded from those totals. Price-derived performance is withheld until the price-source policy and freshness gate are green.