HARTLINE INVESTMENT CORP/

RIA/Wealth

HARTLINE INVESTMENT CORP/ is a RIA/Wealth based in Winnetka, IL led by Brian William Hart, managing $957.8M across 112 long positions as of Q3 2025 with 46% Technology concentration, 56% concentrated in top 10 holdings, and 46% technology allocation.

CEOBrian William Hart

Portfolio Value: $957.8M
Positions: 112
Top Holding: NVDA at 13.69%
Last Reported: Q3 2025

Address460 Winnetka Avenue, Suite 5, Winnetka, IL, 60093, United States

Top Holdings

Largest long holdings in HARTLINE INVESTMENT CORP/'s portfolio (55.6% of total portfolio)

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Holding	Sector	Position	Weight	Traded	Ownership	Owned Since
1 Nvidia NVDA	Semiconductors Technology	$131.2M	13.69%	-$11.4M Sold	0.00% 703.0K shares	Q2 2016 Held for 9y 5m
2 Berkshire Hathaway BRK.A	Insurance - Diversified Financial Services	$90.5M	9.45%	-$4.5M Sold	0.01% 120.0 shares	Q4 2019 Held for 5y 11m
3 iShares Floating Rate Bond FLOT	ETF ETF	$59.2M	6.18%	+$15.9M Bought	— 1.2M shares	Q4 2019 Held for 5y 11m
4 Apple AAPL	Consumer Electronics Technology	$55.3M	5.77%	-$670.7K Sold	0.00% 217.2K shares	≤ Q2 2013 Held for 12y 5m+
5 Microsoft MSFT	Software - Infrastructure Technology	$34.1M	3.56%	-$1.2M Sold	0.00% 65.8K shares	≤ Q2 2013 Held for 12y 5m+
6 Marvell Technology, Inc. MRVL	Semiconductors Technology	$33.4M	3.49%	-$948.1K Sold	0.05% 397.8K shares	Q1 2020 Held for 5y 8m
7 Alphabet Inc. GOOGL	Internet Content & Information Communication Services	$33.0M	3.45%	+$160.7K Bought	0.00% 135.8K shares	≤ Q2 2013 Held for 12y 5m+
8 Vertiv Holdings Co VRT	Electrical Equipment & Parts Industrials	$32.9M	3.43%	+$3.9M Bought	0.06% 217.8K shares	Q4 2023 Held for 1y 11m
9 Cloudflare, Inc. NET	Software - Infrastructure Technology	$32.4M	3.39%	+$1.0M Bought	0.04% 151.2K shares	Q4 2022 Held for 2y 11m
10 Amazon AMZN	Specialty Retail Consumer Cyclical	$30.9M	3.22%	-$2.5M Sold	0.00% 140.6K shares	Q1 2017 Held for 8y 8m

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Changes

Portfolio activity, position movements, and quarter-over-quarter changes in HARTLINE INVESTMENT CORP/'s latest filing

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Market Value

$957.8M

Prior: $872.1M

Q/Q Change

+9.83%

+$85.7M

Net Flows % of MV

-0.492%

Turnover Ratio

6.84%

New Purchases

8 stocks

$11.4M

Added To

21 stocks

+$47.3M

Sold Out Of

2 stocks

$489.3K

Reduced Holdings

53 stocks

-$62.9M

Increased Positions

Position	Shares Δ	Change
1 Vistra VST	New	0 → 28.0K +$5.5M
2 Dell Technologies DELL	New	0 → 29.7K +$4.2M
3 Schwab 1-5 Year Corporate Bond SCHJ	New	0 → 18.6K +$464.6K
4 BitMine Immersion Technologies, Inc. BMNR	New	0 → 8.2K +$426.9K
5 IonQ IONQ	New	0 → 4.1K +$252.5K

Decreased Positions

Position	Shares Δ	Change
1 Pinterest, Inc. PINS	Sold	7.3K → 0 −$262.1K
2 Colgate-Palmolive CL	Sold	2.5K → 0 −$227.3K
3 Marsh & McLennan Companies MMC	-82.19%	7.6K → 1.4K −$1.3M
4 Iris Energy IREN	-69.01%	15.6K → 4.8K −$506.6K
5 Carrier Global CARR	-67.78%	84.0K → 27.1K −$3.4M