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.
According to the SEC 13F filed on Aug 14, 2026, Andrew R. Adams's Mairs & Power Growth Fund portfolio reflects a quant / systematic investor approach across 246 reported 13F positions as of quarter-end Jun 30, 2026. Portfolio returns are led by NVIDIA (~9% of total exposure), with the top five holdings representing approximately 30% of reported value. The portfolio maintains structural breadth across 246 positions, with economic weighting tilted toward large-cap technology and growth-oriented names. 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, Structurally Diversified.
Investment Style
Value, growth, quality, and behavioral classification from latest 13F holdings.
Primary type: Quant / Systematic Investor
Traits: Long-Term Holder, Broadly 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 21.2% of assets, top five 30.2%, and the largest single position is 8.7%.
Top 3 weight
21.2%
Top 5 weight
30.2%
Top 10 weight
44.6%
Largest position
8.7%
Top holdings: NVIDIA Corporation, Microsoft Corporation, Amazon.com, Inc., Alphabet Inc., Eli Lilly and Company — 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 8.7%, top ten 44.6%) and high economic diversification (HHI 0.03). Turnover tolerance maps to a buy & hold profile.
Largest position
8.7%
Top 10 weight
44.6%
Max sector
33.8%
Diversification
High
Strategy Evolution
How the strategy changed between the two most recent filing periods.
Mar 31, 2026 → Jun 30, 2026
- Position count increased from 239 to 246 (+7 names).
- Top-five concentration rose from 29.6% to 30.2%.
- Quarter-over-quarter portfolio weight turnover: 7.6%.
For trade-level changes, see the Activity page. View activity.
Similar Investors
Peer group with comparable portfolio behavior.
Similar-investor comparisons are coming soon.