RIA

MOUNTAIN PACIFIC INVESTMENT ADVISERS LLC

Pasadena, CA SEC Registered Investment Advisor Institutional CIK: 0001067324
13F Score ?
28
3-Year
13F Score ?
26
7-Year
S&P 500 ?
80
Benchmark
$617M
AUM
+2.73%
2025 Q4
+3.14%
1-Year Return
+41.68%
Top 10 Concentration
+4.60%
Turnover
-3.43%
AUM Change
Since 1999
First Filing
144
# of Holdings

Fund Overview

About
Investment Strategy
Analytics Summary
Risk Profile
Key Personnel
Thomas Haywood — Managing Director & Chief Investment Officer
Nicholas Galluccio — Senior Portfolio Manager
Peter Keehn — Portfolio Manager

Activity Summary — 2025 Q4

Q4 2025 13F Filed: Jan 29, 2026

Top Buys

% $
Stock % Impact
DHR DANAHER CORPORA.. +0.60%
TMO THERMO FISHER S.. +0.56%
RSP INVESCO EXCHANG.. +0.41%
AME AMETEK INC.. +0.40%
IEX IDEX CORP.. +0.27%
MU MICRON TECHNOLO.. +0.21%

Top Sells

% $
Stock % Impact
FI FISERV INC.. -2.51%
AJG GALLAGHER ARTHU.. -0.67%
APH AMPHENOL CORP N.. -0.55%
FAST FASTENAL CO.. -0.34%
VRT VERTIV HOLDINGS.. -0.34%
ROP ROPER TECHNOLOG.. -0.31%

Top Holdings

2025 Q4
Stock %
APH Amphenol Cor.. 9.04%
AME Ametek Inc.. 6.24%
DHR Danaher Corp.. 4.79%
TMO Thermo Fishe.. 3.69%
IEX Idex Corp.. 3.47%
AJG Gallagher Ar.. 3.09%
View All Holdings

Activity Summary

Latest
Market Value $617M
AUM Change -3.43%
New Positions 3
Increased Positions 19
Closed Positions 3
Top 10 Concentration +41.68%
Portfolio Turnover +4.60%
Alt Turnover +6.38%

Sector Allocation Trends

Quarterly History
Free View: Last 10 Quarters. Subscribe to see full history

Holdings Analysis

Size: % of Portfolio Color: Last Full-Quarter Return No data
Free: 10 quarters

Positions Dynamics

Visualizing Top 20 holdings weight history over the last 10 quarters.

Portfolio Analytics — Latest

MOUNTAIN PACIFIC INVESTMENT ADVISERS LLC risk dashboard covering volatility, beta, value-at-risk, drawdowns, concentration, factor tilts, benchmark comparison, and stress testing for the latest disclosed portfolio.

Risk access
Building institutional risk profile...
Guru Intelligence Hub Pro
Real-time Analytics
High-Conviction Alpha
AAPL 92.4
NVDA 88.1
MSFT 74.3
Strategy Guardian
Style Drift 0.12
Sector Rotation 0.38

Tracking institutional benchmark deviation

Scenario Lab
2008 GFC -32.4%
Covid-19 -18.1%
2022 Bear -24.7%
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Real conviction scores for every holding  ·  Strategy Guardian alerts  ·  Live Scenario Lab stress tests
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Best Strategy vs. Benchmarks

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NT
Returns
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Latest Quarter
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1-Year Return
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Ann. Return
Risk
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Std Deviation
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Max Drawdown
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Beta vs SPY
Quality
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Sharpe
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Sortino
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Win Rate
Edge Metrics Last 10 quarters only
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Alpha annualized
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Up Capture
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Down Capture

Strategy Backtester: MOUNTAIN PACIFIC INVESTMENT ADVISERS LLC

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Find the best N! Test multiple portfolio sizes at once to discover the optimal configuration.

Risk insights! Identify periods when the fund lagged the benchmark – critical for timing entries.

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+127%
Avg. Return

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Underperformance Analysis — Top 10 Holdings vs SPY

Backtesting MOUNTAIN PACIFIC INVESTMENT ADVISERS LLC's top 10 holdings against SPY identified 85 underperformance periods. Worst drawdown: 1999-10 – 1999-12 (-18.6% vs SPY, 3 quarters).

Avg. lag: -4.4% vs SPY Avg. duration: 1.9 quarters
Backtest Snapshot — Top 10 Holdings (Mn-Weighted)

The ticker-level breakdown shows how each of MOUNTAIN PACIFIC INVESTMENT ADVISERS LLC's top holdings contributed to portfolio returns quarter by quarter. Strongest recent contributors inside the last 5 years of the quarterly Top 10 backtest window: APH (2021 Q1 – 2025 Q3, +23.8 pts), VRT (2023 Q3 – 2025 Q2, +13.6 pts), AME (2021 Q1 – 2025 Q3, +7.7 pts), AJG (2021 Q2 – 2025 Q3, +5.7 pts), FIX (2025 Q2 – 2025 Q2, +5.4 pts) .

Strategy ann.: 11.1% SPY ann.: 8.5% Period: 1999–2026
Best Recent Contributors — Last 5Y
1 of 5 recent top contributors lagged SPY, which means even some of this fund's best return drivers still failed to beat a simple index over the same window.
2021 Q1 – 2025 Q3 • 19Q in Top 10 Beat SPY
APH
+348%
SPY
+80%
Contrib
+23.8%
2023 Q3 – 2025 Q2 • 7Q in Top 10 Beat SPY
VRT
+199%
SPY
+38%
Contrib
+13.6%
2021 Q1 – 2025 Q3 • 19Q in Top 10 Lagged SPY
AME
+74%
SPY
+80%
Contrib
+7.7%
2021 Q2 – 2025 Q3 • 18Q in Top 10 Beat SPY
AJG
+74%
SPY
+65%
Contrib
+5.7%
2025 Q2 – 2025 Q2 • 1Q in Top 10 Beat SPY
FIX
+74%
SPY
+9%
Contrib
+5.4%
Stock return (green = beat SPY)   Stock return (red = lagged SPY)   SPY same period   Cumulative contribution during the last 5 years of the quarterly Mn-weighted Top 10 strategy

Disclaimer: 13Foresight is not a registered investment adviser, broker-dealer, or financial planner. All information on this site is provided solely for informational and educational purposes and does not constitute investment advice, a solicitation, or a recommendation to buy or sell any security. Portfolio backtests shown on this page are hypothetical and simulated — they do not represent actual trading results and were constructed with the benefit of hindsight. Actual results would differ materially. 13F filings disclose only long equity positions valued above $10,000, submitted up to 45 days after quarter-end; they do not capture short positions, options, bonds, cash, private investments, or non-U.S. securities. A fund's backtest performance may not reflect its actual returns, as managers frequently generate alpha through strategies not visible in 13F data. Past performance is not indicative of future results. All data sourced from public SEC EDGAR filings. Use at your own risk. Full Terms of Use.