Q1 2026 13F · SEC CIK 2003159
Brummer Multi-Strategy AB
Investment managerFiled 2026-05-06 for Q1 2026. Open the filing ↗ · All SEC filings ↗
- Reported 13F value
- $24.0M
- Reported positions
- 8
- Holdings vs S&P 500, 3 yrs
- —
- Average holding period
- 1 qtrs
Brummer Multi-Strategy AB is an investment manager that reported 8 positions worth $24.0M in its Q1 2026 13F, filed 2026-05-06. Its largest holdings were CBRE Group, Inc. Class A (CBRE, 28.1%), Agree Rlty Corp (ADC, 27.3%), Arvinas Inc (ARVN, 12.6%).
Brummer Multi-Strategy AB holdings all 8 positions.
Weights are shares of the filer's total reported 13F value, compared with Q4 2025. Share changes may reflect splits; weight changes also reflect price moves. A 13F shows long US-listed positions only, up to 135 days after the fact.
| Stock | % of 13F value | Share change | Reported value |
|---|---|---|---|
| CBRECBRE Group, Inc. Class A | 28.1% | — | $6.7M |
| ADCAgree Rlty Corp | 27.3% | — | $6.6M |
| ARVNArvinas Inc | 12.6% | +71.4% | $3.0M |
| ABVXAbivax SA | 10.4% | +56.0% | $2.5M |
| MRVIMaravai Lifesciences Hldgs-A | 9.0% | +66.0% | $2.2M |
| WPCWP Carey Inc | 8.1% | — | $1.9M |
| ATAIAtaibeckley Inc | 4.1% | — | $975K |
| GRMLWGreenland Mines Ltd | 0.5% | -39.0% | $122K |
What Brummer Multi-Strategy AB bought and sold in Q1 2026, against Q4 2025.
New positions
- CBRE CBRE Group, Inc. Class A28.1% of 13F
- ADC Agree Rlty Corp27.3% of 13F
- WPC WP Carey Inc8.1% of 13F
- ATAI Ataibeckley Inc4.1% of 13F
Added to
- ARVN Arvinas Inc+71.4% shares
- MRVI Maravai Lifesciences Hldgs-A+66.0% shares
- ABVX Abivax SA+56.0% shares
Reduced
- GRMLW Greenland Mines Ltd-39.0% shares
Sold out
- NMRK Newmark Group Incwas 21.0%
- CI The Cigna Groupwas 19.7%
- IQV Iqvia Holdings Incwas 11.2%
- BDX Becton Dickinson & Cowas 6.1%
- ATAI Beckley N.V.was 5.8%
- SLNO Soleno Therapeutics Incwas 2.4%
- FHTX Foghorn Therapeutics Incwas 0.2%
Share counts compared with the Q4 2025 13F; a split also changes share counts.
How the holdings did against the S&P 500.
- 1 year
- —
- 3 years
- —
- 5 years
- —
A portfolio of the filer's 20 largest 13F positions, weighted by value and rebuilt each quarter on the day the filing became public. 13Fs show long US-listed positions only, so this is an estimate of the stock picks, not the fund's reported returns.
Reported 13F value by quarter.
| Quarter | 13F value | Positions |
|---|---|---|
| Q1 2026 | $24.0M | 8 |
| Q4 2025 | $16.5M | 11 |
Questions about Brummer Multi-Strategy AB's portfolio
What stocks does Brummer Multi-Strategy AB own?
Brummer Multi-Strategy AB's latest 13F, for Q1 2026 and filed May 6, 2026, lists 8 positions worth $24.0M. The largest are CBRE Group, Inc. Class A (CBRE) at 28.1%, Agree Rlty Corp (ADC) at 27.3%, Arvinas Inc (ARVN) at 12.6%, Abivax SA (ABVX) at 10.4% and Maravai Lifesciences Hldgs-A (MRVI) at 9.0%.
What did Brummer Multi-Strategy AB buy last quarter?
In Q1 2026, Brummer Multi-Strategy AB added a new position in CBRE Group, Inc. Class A (CBRE), a new position in Agree Rlty Corp (ADC), a new position in WP Carey Inc (WPC), a new position in Ataibeckley Inc (ATAI), Arvinas Inc (ARVN) (+71.4% shares), Maravai Lifesciences Hldgs-A (MRVI) (+66.0% shares) and Abivax SA (ABVX) (+56.0% shares), compared with its Q4 2025 filing.
What did Brummer Multi-Strategy AB sell last quarter?
In Q1 2026, Brummer Multi-Strategy AB sold all of Newmark Group Inc (NMRK), sold all of The Cigna Group (CI), sold all of Iqvia Holdings Inc (IQV), sold all of Becton Dickinson & Co (BDX), sold all of ATAI Beckley N.V. and Greenland Mines Ltd (GRMLW) (-39.0% shares), compared with its Q4 2025 filing.
When is Brummer Multi-Strategy AB's next 13F filing due?
13F filings are due 45 days after each quarter ends. Brummer Multi-Strategy AB's filing for the quarter ending Jun 30, 2026 was due by Aug 14, 2026; this page updates once it is processed.