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Funds (13F)

Weitz Investment Management, Inc.

Backtest from 9 Aug 2013 to 2 Nov 2026 · weekly · hypothetical

Watch this strategy
Return a year
+11.4%
S&P 500 +13.9%
Last 12 months
+10.9%
S&P 500 +12.1%
Sharpe ratio
0.57
S&P 500 0.77
Biggest drop
−36.7%
S&P 500 −31.8%
$10.0k$20.0k$40.0k 2013201520172019202120232025 $55.9k$41.8k
StrategyS&P 500 $10,000 in Weitz Investment Management, Inc. from 9 Aug 2013 against the S&P 500 (total return) over the same dates, marked weekly, log scale. Hypothetical: before taxes and trading costs.

About

Copies Weitz Investment Management, Inc.'s quarterly 13F holdings in the companies we cover, weighted by reported value: it buys on the first trading day after each 13F is filed (up to 45 days after the quarter) and holds until the next filing. A 13F shows long US-listed positions only, at the quarter's end, so this misses shorts, cash, bonds, non-US holdings and trading within the quarter.

Weitz Investment Management, Inc.'s 13F holdings →

Key statistics

MeasureStrategyS&P 500
Return a year (compound)+11.4%+13.9%
Total return+318%+459%
Last 12 months+10.9%+12.1%
Last 3 months+8.6%—
Last month+8.4%—
This year so far+8.4%—
Volatility a year18.4%16.0%
Sharpe ratio0.570.77
Biggest drop−36.7%−31.8%
Beta to the S&P 5001.051.00
Alpha a year (t-statistic)−2.4% (−1.11)—
Share of weeks up57%—

Sharpe ratio uses returns above the 3-month Treasury bill rate. Alpha is the yearly return left after allowing for the strategy's exposure to the S&P 500 (CAPM); a t-statistic below about 2 means it cannot be told apart from luck.

Insights

CompanyWeightHeld sinceReturn since
DHR8.2%——
V8.0%——
MA6.6%——
AON6.2%——
VMC5.3%——
META5.1%——
TMO5.1%——
IEX5.0%——
MSFT5.0%——
AMZN4.6%——
TECH3.4%——
SIRI3.1%——
ADI3.0%——
EFX2.7%——
LH2.4%——
MLM2.4%——
GPN2.2%——
TXN2.0%——
IDXX1.6%——
ACIW1.6%——
PRM1.4%——
MELI1.4%——
ACN1.3%——
IR1.2%——
CSGP1.1%——
EEFT1.0%——
ASML1.0%——
LKQ0.9%——
NFLX0.9%——
TSM0.8%——
ORCL0.7%——
COF0.7%——
CRM0.7%——
NVDA0.6%——
VLTO0.6%——
RGEN0.5%——
LIN0.3%——
MTD0.3%——
POOL0.3%——
SPGI0.3%——
APH0.1%——
FTV0.1%——
FERG0.1%——
CMCSA0.1%——
CHTR0.0%——

Weighted by reported value in the latest 13F, held until the next filing.

PeriodReturn a yearS&P 500SharpeS&P 500Biggest dropBetaAlpha (t)
Whole backtest9 Aug 2013 to 2 Nov 2026+11.4%+13.9%0.570.77−36.7%1.05−2.4% (−1.11)
2018 onwards5 Jan 2018 to 2 Nov 2026+10.1%+13.9%0.440.66−36.7%1.04−3.5% (−1.30)
Last three years3 Nov 2023 to 2 Nov 2026+11.3%+21.8%0.471.16−19.1%0.87−6.7% (−1.19)
Last year7 Nov 2025 to 2 Nov 2026+13.4%+14.2%0.630.84−15.8%0.78+2.0% (0.16)
DateCompanyAction
14 Aug 2026NFLXBought
14 Aug 2026MTDBought
14 Aug 2026COFBought
15 May 2026TSMBought
15 May 2026RGENBought
15 May 2026POOLBought
15 May 2026NVDABought
15 May 2026IRBought
15 May 2026FERGBought
15 May 2026ASMLBought
15 May 2026APHBought
13 Feb 2026EEFTBought
14 Nov 2025MELIBought
14 Nov 2025GLIBABought
14 Nov 2025CDWBought
15 Aug 2025RALBought
16 May 2025IDXXBought
14 Feb 2025PRMBought
15 Nov 2024VRSNBought
15 Nov 2024VMCBought
15 Nov 2024VLTOBought
15 Nov 2024VBought
15 Nov 2024TXNBought
15 Nov 2024TMOBought
15 Nov 2024TECHBought

Dated at the rebalance that made the change.

DateCompanyAction
14 Aug 2026ODFLSold
14 Aug 2026CDWSold
15 May 2026ROPSold
15 May 2026ITSold
13 Feb 2026KMXSold
13 Feb 2026GLIBASold
14 Nov 2025RALSold
15 Aug 2025ADBESold
16 May 2025LBTYKSold
16 May 2025FISSold
14 Feb 2025VRSNSold
14 Feb 2025MCHPSold
14 Feb 2025GWRESold

Dated at the rebalance that made the change.

Backtests are hypothetical and use today's listed companies only, which flatters results. Past performance does not predict future returns. This is research, not investment advice. How we backtest