Andrew R. Adams - Mairs & Power Growth Fund Investment Strategy & Portfolio Analysis
How Mairs & Power Growth Fund allocates capital, manages risk, and constructs its portfolio — based on SEC 13F filings.
As of Mar 31, 2026, Andrew R. Adams's Mairs & Power Growth Fund portfolio reflects a quant / systematic investor approach across 239 reported 13F positions. Portfolio returns are led by NVIDIA (~9% of total exposure), with the top five holdings representing approximately 30% of reported value. Across 239 reported holdings, economic exposure is broadly distributed across technology, industrials, and healthcare without dominant single-name concentration. Exposure to high-growth and technology-oriented segments is elevated relative to peers, with performance anchored in growth-oriented names across technology, industrials, and healthcare. The portfolio exhibits extremely low turnover, reinforcing a patient, conviction-led investment approach. Distinctive traits include Long-Term Holder, Broadly Diversified, Economically Diversified.
Investment Style
Value, growth, quality, and behavioral classification from latest 13F holdings.
Primary type: Quant / Systematic Investor
Traits: Long-Term Holder, Broadly Diversified, Economically Diversified, Structurally Diversified
Turnover profile
Buy & Hold
Holding horizon
Long-Term
Portfolio Construction
Concentration and position sizing in the latest filing.
Portfolio construction is lowly concentrated: top three names represent 21.5% of assets, top five 29.6%, and the largest single position is 8.5%.
Top 3 weight
21.5%
Top 5 weight
29.6%
Top 10 weight
44.2%
Largest position
8.5%
Top holdings: NVIDIA Corporation, Microsoft Corporation, Amazon.com, Inc., Alphabet Inc., Graco Inc. — view full holdings
Sector Preferences
Where capital is allocated by sector.
Capital is tilted toward Technology and Industrials, with 12 sectors represented in the latest filing.
Leading sectors: Technology, Industrials, Healthcare
Risk Framework
Concentration, diversification, and turnover tolerance.
This investor accepts low single-name risk (largest position 8.5%, top ten 44.2%) and high economic diversification (HHI 0.03). Turnover tolerance maps to a buy & hold profile.
Largest position
8.5%
Top 10 weight
44.2%
Max sector
32.8%
Diversification
High
Strategy Evolution
How the strategy changed between the two most recent filing periods.
Dec 31, 2025 → Mar 31, 2026
- Position count decreased from 241 to 239 (-2 names).
- Top-five concentration fell from 32.6% to 29.6%.
- Largest holding changed from Microsoft Corporation to NVIDIA Corporation.
- Quarter-over-quarter portfolio weight turnover: 8.6%.
For trade-level changes, see the Activity page. View activity.
Similar Investors
Peer group with comparable portfolio behavior.
Similar-investor comparisons are coming soon.