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Brummer Multi-Strategy AB

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13F filer, CIK 2003159, STOCKHOLM, Sweden

Brummer Multi-Strategy AB reported $16,543,444 across 11 holdings for the quarter ended 2025-12-31, in a 13F-HR filed 2026-02-04. Its ten largest share positions make up 99.85% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0002003159-26-000002

Period
2025-12-31
Reported value
$16.5M
Holdings
11
Top 10 weight
99.85%
New
9
Sold out
2

Largest buys vs the previous quarter

SecurityShares changeApprox. value
CInew+11,818$3.25M
ARVNnew+166,342$1.97M
ABVXnew+14,375$1.94M
IQVnew+8,183$1.84M
MRVInew+457,707$1.49M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
PTCTexited-19,142-$1.17M
CIGIexited-4,426-$691K

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q4 2025

Share positions as resolved from 13F-HR 0002003159-26-000002, largest first. % of portfolio is the value over $16,543,444, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
NMRKNEWMARK GROUP INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: 189,519 shares; 2025Q4: 200,493 shares 200,493$3.48M21.01%+10,974Timeline
CITHE CIGNA GROUPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 11,818 shares 11,818$3.25M19.66%newTimeline
ARVNARVINAS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 166,342 shares 166,342$1.97M11.93%newTimeline
ABVXABIVAX SAQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 14,375 shares 14,375$1.94M11.72%newTimeline
IQVIQVIA HLDGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 8,183 shares 8,183$1.84M11.15%newTimeline
MRVIMARAVAI LIFESCIENCES HLDGS IQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 457,707 shares 457,707$1.49M8.99%newTimeline
BDXBECTON DICKINSON & COQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: 470 shares; 2025Q4: 5,176 shares 5,176$1M6.07%+4,706Timeline
ATAIBECKLEY INCATAIBECKLEY INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 234,915 shares 234,915$961K5.81%new
SLNOSOLENO THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 8,741 shares 8,741$405K2.45%newTimeline
GRMLGREENLAND MINES LTDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 606,757 shares 606,757$175K1.06%newTimeline
FHTXFOGHORN THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 4,708 shares 4,708$25.4K0.15%newTimeline

Sold out in Q4 2025

Positions in the previous quarter's report that this quarter's report no longer lists.

SecurityShares beforeValue beforeType
PTCTPTC THERAPEUTICS INC19,142$1.17Mshares
CIGICOLLIERS INTL GROUP INC4,426$691Kshares

How Q4 2025 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0002003159-26-000002 base2026-02-04acceptance time not in the bulk data set