DOSSIER · 13F-HR · Q1 2026

SCHWERIN BOYLE CAPITAL MANAGEMENT INC

$788M in tracked AUM across 47 positions as of Q1 2026.

SB
CIK 0000937522 · last filed Mar 31, 2026
Total AUM
$788M
as of Q1 2026
Holdings
47
positions
Whale Score
60
60
tracked
Activity
no data
changes this Q
AI Analysis · Q1 2026
Comprehensive Analysis of SCHWERIN BOYLE CAPITAL MANAGEMENT INC (SEC 13F)
Portfolio Overview

Schwerin Boyle Capital Management Inc. manages a concentrated portfolio valued at approximately $395.02 million as of the reporting period ended September 30, 2025. The firm employs a high-conviction strategy characterized by low turnover and a relatively narrow focus, holding just 20 securities. Despite a significant amount of portfolio activity during the quarter—with 15 positions either...

The portfolio is top-heavy, with the largest three positions (Meta, Alphabet, and JPMorgan Chase) accounting for 40.22% of total assets. This structure suggests a "best ideas" approach where capital is allocated disproportionately to the manager's highest-confidence picks rather than broad diversification. Notably, the data indicates a large allocation to an "Unknown" sector ($73.32M), which likely corresponds to positions 5, 6, 8, 11, 12, and 18, where specific sector tags were not provided in the summary but represent significant holdings such as Acuity Brands and Sensata Technologies.

Key Holdings

Quarter at a glance — Q1 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q1 2026.

#HoldingValueSharesWeight
01
BRK/B
BERKSHIRE HATH B
$103M215K13.1%
02
WFC
WELLS FARGO
$52M649K6.6%
03
META
META PLATFORMS
$45M78K5.7%
04
GOOG
ALPHABET, INC
$44M152K5.5%
05
AXP
AMER EXPRESS
$43M143K5.5%
06
XOM
EXXON MOBIL
$34M201K4.3%
07
JPM
JP MORGAN CHASE
$33M112K4.2%
08
MA
MASTERCARD INC
$25M50K3.1%
09
SPXC
SPX TECH. INC.
$24M120K3.0%
10
AYI
ACUITY INC.
$21M74K2.6%

Filing history

2026Q1Mar 31
$788M 13.7%
47 positionsView →
2025Q4Dec 31
$913M 131.1%
46 positionsView →
2025Q3Sep 30
$395M 4.2%
20 positionsView →
2025Q2Jun 30
$379M 4.4%
21 positionsLocked
2025Q1Mar 31
$397M 59.3%
23 positionsLocked
2024Q4Dec 31
$975M 2.1%
53 positionsLocked
2024Q3Sep 30
$955M 0.1%
53 positionsLocked
2024Q2Jun 30
$953M 5.2%
51 positionsLocked
2024Q1Mar 31
$1.0B 12.4%
52 positionsLocked
2023Q4Dec 31
$895M 5.0%
52 positionsLocked
2023Q3Sep 30
$852M 19.7%
52 positionsLocked
2023Q2Jun 30
$1.1B 8.9%
47 positionsLocked
Showing 12 of 100