MAIRS & POWER INC — Quarter-over-Quarter 13F Allocation Shifts Q1 2026
In Q1 2026, MAIRS & POWER INC initiated 22 new positions, increased allocation to 10 existing positions, trimmed 10 positions, and exited 20 positions entirely. The fund's 13F equity book declined from $10.39B to $9.79B (-5.8% QoQ) . All deltas are sourced from sequential SEC Form 13F-HR filings; share-count changes reflect explicit trading activity, while weight changes can also include price movement. This page lists every position change reported — the portfolio overview shows a summary of the top shifts.
Net Portfolio Value Change
- $10.39BPrior quarter
- $9.79BCurrent quarter
- $-0.60BNet delta
- -5.8%% change
New Position Initiations Q1 2026
Securities disclosed for the first time in Q1 2026 that were not present in the prior 13F-HR filing.
Largest Allocation Increases Q1 2026
Largest portfolio-weight increases in existing positions. Share-count delta is shown separately so price-only re-weighting can be distinguished from active adds.
| Company | Ticker | Δ Weight | Δ Shares | History |
|---|---|---|---|---|
| WASTE MANAGEMENT INC | WM | +0.93% | +39724.00% | Holders → |
| VANGUARD TAX-MANAGED FDS | VEA | +0.03% | +781.98% | Holders → |
| VANGUARD INDEX FDS | VO | +0.03% | +424.92% | Holders → |
| AMERIPRISE FINANCIAL, INC. | AMP | +0.69% | +362.43% | Holders → |
| VANGUARD INDEX FDS | VB | +0.01% | +288.03% | Holders → |
| BENTLEY SYS INC | BSY | +0.05% | +184.58% | Holders → |
| JAMES HARDIE INDS PLC | JHX | +0.03% | +165.53% | Holders → |
| UIPATH INC | PATH | +0.00% | +153.20% | Holders → |
| PALO ALTO NETWORKS INC | PANW | +0.48% | +141.42% | Holders → |
| XYLEM INC | XYL | +0.01% | +136.01% | Holders → |
Largest Allocation Reductions Q1 2026
Largest portfolio-weight decreases in existing positions (positions kept open at a lower allocation).
| Company | Ticker | Δ Weight | Δ Shares | History |
|---|---|---|---|---|
| SKYWATER TECHNOLOGY INC | SKYT | -0.03% | -92.86% | Holders → |
| SALESFORCE INC | CRM | -0.66% | -83.11% | Holders → |
| KRAFT HEINZ CO | KHC | -0.32% | -81.08% | Holders → |
| ULTA BEAUTY INC | ULTA | -0.01% | -66.57% | Holders → |
| HUB GROUP INC | HUBG | -0.04% | -32.24% | Holders → |
| SYSCO CORP | SYY | -0.03% | -28.34% | Holders → |
| JOHNSON & JOHNSON | JNJ | -0.16% | -28.19% | Holders → |
| ZIMMER BIOMET HOLDINGS INC | ZBH | -0.00% | -27.48% | Holders → |
| OLD NATL BANCORP IND | ONB | -0.03% | -26.57% | Holders → |
| TENNANT CO | TNC | -0.21% | -25.02% | Holders → |
Exited Positions Q1 2026
Positions present in the prior 13F-HR filing that no longer appear in Q1 2026.
| Company | Ticker | Last-Reported Portfolio Weight |
|---|---|---|
| PIPER SANDLER COMPANIES | SYN_724078100 | 0.57% |
| INSPIRE MEDICAL SYSTEMS INC | INSP | 0.05% |
| MGP INGREDIENTS INC NEW | MGPI | 0.04% |
| CLEARWATER ANALYTICS HLDGS I | CWAN | 0.02% |
| GENTHERM INC | THRM | 0.02% |
| EXACT SCIENCES CORP | SYN_30063P105 | 0.02% |
| SS INDUSTRIAL SELECT SECTOR | XLI | 0.02% |
| SS CONSUMER STAPLES SEL SECT | XLP | 0.01% |
| SS FINANCIAL SELECT SECTOR | XLF | 0.01% |
| CVRX INC | CVRX | 0.01% |
| SS HEALTH CARE SELECT SECTOR | XLV | 0.01% |
| AMCOR PLC | SYN_G0250X107 | 0.01% |
| SS MATERIALS SELECT SECTOR | XLB | 0.00% |
| AUTODESK INC | ADSK | 0.00% |
| VANGUARD MUN BD FDS | VTEB | 0.00% |
| REGIONS FINANCIAL CORP NEW | RF | 0.00% |
| EATON CORP PLC | ETN | 0.00% |
| NOVARTIS AG | NVS | 0.00% |
| BLACKROCK INC | BLK | 0.00% |
| SONY GROUP CORP | SONY | 0.00% |
Methodology & FAQ
How MAIRS & POWER INC Quarterly Changes Are Computed
Each row above is computed by joining the most recent 13F-HR filing for MAIRS & POWER INC against the immediately preceding quarterly filing for the same fund. Portfolio weights are normalized to exclude listed options for comparability. A complete description of the methodology — including how confidential treatment filings are handled and why share count rather than weight is the cleaner trading signal — is documented in the Methodology.
Which positions did MAIRS & POWER INC initiate in Q1 2026?
MAIRS & POWER INC established 22 new positions in Q1 2026: PIPER SANDLER COMPANIES (PIPR, 0.43%), SPROUTS FMRS MKT INC (SFM, 0.23%), VANGUARD INDEX FDS (VOO, 0.09%), AMBARELLA INC (AMBA, 0.06%), API GROUP CORP (APG, 0.02%), SOLSTICE ADVANCED MATLS INC (SOLS, 0.02%), VANGUARD INTL EQUITY INDEX F (VWO, 0.01%), INVESCO EXCHANGE TRADED FD T (RSP, 0.01%), VANGUARD SCOTTSDALE FDS (VONE, 0.01%), VANGUARD SCOTTSDALE FDS (VGLT, 0.01%), AMCOR PLC (AMCR, 0.01%), SPDR GOLD TR (GLD, 0.01%), STATE STR SPDR S&P MIDCAP 40 (MDY, 0.01%), ISHARES TR (USMV, 0.00%), WATERS CORP (WAT, 0.00%), MICRON TECHNOLOGY INC (MU, 0.00%), VANGUARD WORLD FD (VGT, 0.00%), UNITED THERAPEUTICS CORP (UTHR, 0.00%), MURPHY OIL CORP (MUR, 0.00%), ANALOG DEVICES INC (ADI, 0.00%), TIMKEN CO (TKR, 0.00%), SNAP INC (SNAP, 0.00%).
Which existing positions saw the largest allocation increases for MAIRS & POWER INC in Q1 2026?
The largest portfolio-weight increases in existing positions were: WASTE MANAGEMENT INC (WM, +0.93% weight, +39724.00% shares), VANGUARD TAX-MANAGED FDS (VEA, +0.03% weight, +781.98% shares), VANGUARD INDEX FDS (VO, +0.03% weight, +424.92% shares), AMERIPRISE FINANCIAL, INC. (AMP, +0.69% weight, +362.43% shares), VANGUARD INDEX FDS (VB, +0.01% weight, +288.03% shares), BENTLEY SYS INC (BSY, +0.05% weight, +184.58% shares), JAMES HARDIE INDS PLC (JHX, +0.03% weight, +165.53% shares), UIPATH INC (PATH, +0.00% weight, +153.20% shares), PALO ALTO NETWORKS INC (PANW, +0.48% weight, +141.42% shares), XYLEM INC (XYL, +0.01% weight, +136.01% shares).
Which positions did MAIRS & POWER INC fully exit in Q1 2026?
MAIRS & POWER INC fully exited 20 positions in Q1 2026: PIPER SANDLER COMPANIES (SYN_724078100, last-reported weight 0.57%), INSPIRE MEDICAL SYSTEMS INC (INSP, last-reported weight 0.05%), MGP INGREDIENTS INC NEW (MGPI, last-reported weight 0.04%), CLEARWATER ANALYTICS HLDGS I (CWAN, last-reported weight 0.02%), GENTHERM INC (THRM, last-reported weight 0.02%), EXACT SCIENCES CORP (SYN_30063P105, last-reported weight 0.02%), SS INDUSTRIAL SELECT SECTOR (XLI, last-reported weight 0.02%), SS CONSUMER STAPLES SEL SECT (XLP, last-reported weight 0.01%), SS FINANCIAL SELECT SECTOR (XLF, last-reported weight 0.01%), CVRX INC (CVRX, last-reported weight 0.01%), SS HEALTH CARE SELECT SECTOR (XLV, last-reported weight 0.01%), AMCOR PLC (SYN_G0250X107, last-reported weight 0.01%), SS MATERIALS SELECT SECTOR (XLB, last-reported weight 0.00%), AUTODESK INC (ADSK, last-reported weight 0.00%), VANGUARD MUN BD FDS (VTEB, last-reported weight 0.00%), REGIONS FINANCIAL CORP NEW (RF, last-reported weight 0.00%), EATON CORP PLC (ETN, last-reported weight 0.00%), NOVARTIS AG (NVS, last-reported weight 0.00%), BLACKROCK INC (BLK, last-reported weight 0.00%), SONY GROUP CORP (SONY, last-reported weight 0.00%).
Which existing positions saw the largest allocation reductions for MAIRS & POWER INC in Q1 2026?
The largest portfolio-weight reductions in positions kept open were: SKYWATER TECHNOLOGY INC (SKYT, -0.03% weight, -92.86% shares), SALESFORCE INC (CRM, -0.66% weight, -83.11% shares), KRAFT HEINZ CO (KHC, -0.32% weight, -81.08% shares), ULTA BEAUTY INC (ULTA, -0.01% weight, -66.57% shares), HUB GROUP INC (HUBG, -0.04% weight, -32.24% shares), SYSCO CORP (SYY, -0.03% weight, -28.34% shares), JOHNSON & JOHNSON (JNJ, -0.16% weight, -28.19% shares), ZIMMER BIOMET HOLDINGS INC (ZBH, -0.00% weight, -27.48% shares), OLD NATL BANCORP IND (ONB, -0.03% weight, -26.57% shares), TENNANT CO (TNC, -0.21% weight, -25.02% shares).
Do quarter-over-quarter 13F allocation changes constitute explicit trading signals?
No. Quarter-over-quarter changes reflect a combination of active trading and market price movement. A weight increase can result from price appreciation alone, without the manager adding shares. Share-count delta is the cleaner indicator of explicit trading activity.