DOSSIER · 13F-HR · Q1 2026

WEITZ INVESTMENT MANAGEMENT, INC.

$1.4B in tracked AUM across 49 positions as of Q1 2026.

WI
CIK 0000883965 · last filed Mar 31, 2026
Total AUM
$1.4B
as of Q1 2026
Holdings
49
positions
Whale Score
64
64
tracked
Activity
no data
changes this Q
AI Analysis · Q1 2026

Weitz Investment Management's book fell to $1.43 billion from $1.69 billion, and the Q1 2026 13F shows broad-based trimming: 28 of 49 positions were reduced against just 6 increases, even as the firm added three genuinely new semiconductor-adjacent names — ASML ($7.3 million), Taiwan Semiconductor ($6.8 million), and Nvidia ($6.1 million) — alongside Ingersoll Rand ($10.7 million). Two of the "increased" positions hide a price effect: Microsoft's share count rose 16% (an $8.7 million genuine buy) while its dollar value fell $7.9 million as the stock declined, and Heico's shares grew 16% (a $5.5 million buy) while value dipped $1.2 million — real conviction additions that a value-only reading would miss entirely. The largest reduction was IDEX Corp, cut 32% in shares (a $24.1 million outflow), while Roper Technologies, Gartner, and Diageo were fully exited.

Broad trimming, not panic selling

Of 49 positions, 28 were decreased and only 6 increased, with 7 unchanged — a pattern of measured, across-the-board profit-taking rather than concentrated exits. IDEX Corp saw the largest reduction, its share count down 32% for a $24.1 million outflow; Old Dominion Freight Line was cut 37% (-$15.0 million), and Global Payments fell 34% (-$11.4 million). Costar Group, Analog Devices, Bio-Techne, Danaher, and Thermo Fisher all saw double-digit share reductions as well — a book-wide lightening rather than a single thesis breaking.

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 HATHAWAY INC DEL
$134M279K9.3%
02
GOOG
ALPHABET INC
$94M327K6.5%
03
DHR
DANAHER CORPORATION
$91M478K6.3%
04
V
VISA INC
$80M265K5.6%
05
MA
MASTERCARD INCORPORATED
$73M147K5.1%
06
G0403H108
AON PLC
$69M214K4.8%
07
MSFT
MICROSOFT CORP
$63M169K4.4%
08
META
META PLATFORMS INC
$60M106K4.2%
09
TMO
THERMO FISHER SCIENTIFIC INC
$59M121K4.2%
10
VMC
VULCAN MATLS CO
$58M214K4.1%

Filing history

2026Q1Mar 31
$1.4B 15.1%
49 positionsView →
2025Q4Dec 31
$1.7B 8.5%
44 positionsView →
2025Q3Sep 30
$1.8B 0.9%
48 positionsView →
2025Q2Jun 30
$1.9B 1.2%
45 positionsLocked
2025Q1Mar 31
$1.9B 2.9%
45 positionsLocked
2024Q4Dec 31
$1.9B 4.4%
47 positionsLocked
2024Q3Sep 30
$2.0B 6.4%
50 positionsLocked
2024Q2Jun 30
$1.9B 3.8%
53 positionsLocked
2024Q1Mar 31
$2.0B 4.4%
54 positionsLocked
2023Q4Dec 31
$1.9B 4.4%
55 positionsLocked
2023Q3Sep 30
$1.8B 3.1%
53 positionsLocked
2023Q2Jun 30
$1.9B 8.1%
51 positionsLocked
Showing 12 of 100