RIA

ATLAS CAPITAL ADVISORS INC. — 13F Portfolio

San Francisco, CA SEC Registered Investment Advisor High Net Worth and Institutional CIK: 0001434165
13F Score ?
10
3Y · Top 10 · Mgr Wt
13F Score ?
9
7Y · Top 10 · Mgr Wt
S&P 500 ?
80
Benchmark
$875M
AUM
+0.00%
2026 Q1
+13.91%
1-Year Return
+22.69%
Top 10 Concentration
+6.97%
Turnover
-2.59%
AUM Change
Since 2020
First Filing
989
# of Holdings

Fund Overview

13F Filed: 2026-05-11

As of 2026 Q1, Atlas Capital Advisors Inc. manages $875M in reported 13F assets , holds 989 positions with +22.69% top-10 concentration , and delivered a 1-year return of +13.91% on its disclosed equity portfolio. Filing 13F reports since 2020. View full holdings list →

About

Investment Strategy

Analytics Summary

Risk Profile

Key Personnel

Jonathan Tunney — Chief Executive Officer and Founder
Brian Langstraat — Chief Investment Officer
Jennifer Ellison — Principal
Official 13F Filings — SEC EDGAR Key personnel and Fund Overview may contain mistakes

Activity Summary — 2026 Q1

Q1 2026 13F Filed: May 11, 2026

Top Buys

% $
Stock % Impact
+0.50%
+0.19%
+0.18%
+0.18%
+0.15%
+0.12%

Top Sells

% $
Stock % Impact
-0.37%
-0.32%
-0.32%
Sold All 😨 Was: 0.28% -0.29%
-0.24%
-0.24%

Top Holdings

2026 Q1 Top 6 mgr. wt. · 2026 Q1+0.00%
Stock %
4.49%
4.43%
2.48%
1.96%
ETF
1.92%
1.75%
View All Holdings

Activity Summary

Latest
Market Value $875M
AUM Change -2.59%
New Positions 75
Increased Positions 257
Closed Positions 57
Top 10 Concentration +22.69%
Portfolio Turnover +6.97%
Alt Turnover +8.30%

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

ATLAS CAPITAL ADVISORS INC. 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%
Unlock the full Guru Intelligence Hub
Real conviction scores for every holding  ·  Strategy Guardian alerts  ·  Live Scenario Lab stress tests
Upgrade to Pro

Best Strategy vs. Benchmarks

AI Backtest: Auto-Optimizing...
Loading AI Backtest...
Don't be Fooled by Randomness
Access Alpha, Capture Ratios, and Batting Average calibrated for this specific strategy.
UPGRADE NOW
Nassim Taleb — author of Fooled by Randomness
Returns
--
Latest Quarter
--
1-Year Return
--
Ann. Return
Risk
--
Std Deviation
--
Max Drawdown
--
Beta vs SPY
Quality
--
Sharpe
--
Sortino
--
Win Rate
--
Payoff Ratio
Edge Metrics Last 10 quarters only
--
Alpha annualized
--
Up Capture
--
Down Capture

Strategy Backtester: ATLAS CAPITAL ADVISORS INC.

Replicate top holdings performance • Compare vs benchmarks • Optimize N

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.

⏱ Run Backtest

Liquid Glass Edition

0
Backtests Run
+127%
Avg. Return

👆 Click the button to launch tickers!

Don't Be Fooled by Randomness
Proven alpha spans cycles, not just 24 months. Unlock full history since 1999.
PRO ACCESS
Free Demo
Try the Backtester on Real Funds
Run full-history backtests on a curated 2-3 funds. See signal quality, drawdowns, and cycle behavior before you decide.
Underperformance Analysis — Top 10 Holdings vs SPY

Backtesting ATLAS CAPITAL ADVISORS INC.'s top 10 holdings against SPY identified 23 underperformance periods. Worst drawdown: 2025-05 – 2025-10 (-19.7% vs SPY, 6 quarters). Currently underperforming.

Avg. lag: -6.2% vs SPY Avg. duration: 2.6 quarters
Backtest Snapshot — Top 10 Holdings (Mn-Weighted)

The ticker-level breakdown shows how each of ATLAS CAPITAL ADVISORS INC.'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: XLK (2021 Q1 – 2025 Q4, +9.3 pts), MSFT (2021 Q2 – 2025 Q4, +5.8 pts), VGK (2021 Q1 – 2025 Q4, +4.8 pts), VSS (2023 Q1 – 2025 Q4, +3.2 pts), AAPL (2021 Q1 – 2025 Q4, +3.0 pts) .

Strategy ann.: 5.1% SPY ann.: 15.1% Period: 2018–2026
Best Recent Contributors — Last 5Y
4 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 Q4 • 17Q in Top 10 Beat SPY
XLK
+157%
SPY
+82%
Contrib
+9.3%
2021 Q2 – 2025 Q4 • 16Q in Top 10 Lagged SPY
MSFT
+42%
SPY
+59%
Contrib
+5.8%
2021 Q1 – 2025 Q4 • 19Q in Top 10 Lagged SPY
VGK
+53%
SPY
+89%
Contrib
+4.8%
2023 Q1 – 2025 Q4 • 9Q in Top 10 Lagged SPY
VSS
+52%
SPY
+63%
Contrib
+3.2%
2021 Q1 – 2025 Q4 • 13Q in Top 10 Lagged SPY
AAPL
+43%
SPY
+68%
Contrib
+3.0%
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

Frequently Asked Questions

What does Atlas Capital Advisors Inc. invest in?
Atlas Capital Advisors employs an evidence-based investment approach that incorporates factor-oriented tilts within a diversified portfolio construction framework. The firm's investment philosophy draws upon academic research identifying systematic factors—including value, size, profitability, and momentum—as sources of risk premiums that informed investors can capture through disciplined implementation. The factor-oriented methodology represents a middle ground between pure passive indexing and traditional active management, utilizing systematic exposure to academically-validated factors while avoiding the speculative security selection and market timing that characterize less disciplined approaches. **13F Portfolio Composition** analysis reveals diversified holdings consistent with factor-based implementation, typically incorporating structured equity exposure across market capitalizations and style orientations. Portfolio construction emphasizes broad diversification as the foundation for capturing market and factor returns while minimizing unrewarded idiosyncratic risk. The evidence-based philosophy holds that consistent application of research-driven principles produces superior long-term outcomes compared to attempts at security selection or market timing. **Sector Allocation History** examination across the firm's extensive filing record reveals how factor tilts manifest in sector exposure while maintaining diversified market participation. The low turnover characteristic of evidence-based strategies reflects systematic rebalancing to maintain target factor exposures rather than reactive trading based on market views. This disciplined approach minimizes transaction costs and tax friction, enhancing after-tax returns important for high-net-worth taxable accounts. **Top 10 Holdings Concentration** analysis provides visibility into the diversified nature of positioning, with holdings typically reflecting systematic factor exposure rather than concentrated individual security bets. The San Francisco client base often includes individuals with concentrated technology sector exposure through employment or business ownership, creating particular need for diversified investment approaches that reduce correlation with existing wealth concentration.
What is Atlas Capital Advisors Inc.'s AUM?
Atlas Capital Advisors Inc. reported $875M in 13F assets as of 2026 Q1. Note: 13F AUM reflects only long equity positions reported to the SEC and may differ from total assets under management.
How concentrated is Atlas Capital Advisors Inc.'s portfolio?
Atlas Capital Advisors Inc. holds 989 disclosed positions. The top 10 holdings represent +22.69% of the reported portfolio, indicating a diversified investment approach.
How to track Atlas Capital Advisors Inc. 13F filings?
Track Atlas Capital Advisors Inc.'s quarterly filings on SEC EDGAR or on this page — data is updated within days of each filing deadline. Subscribe to 13Foresight for position-change alerts.
Who manages Atlas Capital Advisors Inc.?
Atlas Capital Advisors Inc. is managed by Jonathan Tunney (Chief Executive Officer and Founder), Brian Langstraat (Chief Investment Officer), Jennifer Ellison (Principal).

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.

Full history →