RIA

ROSENBLUM SILVERMAN SUTTON S F INC /CA — 13F Portfolio

San Francisco, CA SEC Registered Investment Advisor High Net Worth CIK: 0000918893
13F Score ?
10
3Y · Top 10 · Mgr Wt
13F Score ?
14
7Y · Top 10 · Mgr Wt
S&P 500 ?
80
Benchmark
$382M
AUM
N/A
2026 Q1
N/A
1-Year Return
+50.41%
Top 10 Concentration
+1.90%
Turnover
-11.54%
AUM Change
Since 1999
First Filing
76
# of Holdings

Fund Overview

13F Filed: 2026-05-13

As of 2026 Q1, Rosenblum Silverman Sutton S F Inc /ca manages $382M in reported 13F assets , holds 76 positions with +50.41% top-10 concentration . Filing 13F reports since 1999. View full holdings list →

About

Investment Strategy

Analytics Summary

Risk Profile

Key Personnel

Kenneth Silverman — Principal & Portfolio Manager
Steven Sutton — Principal & Portfolio Manager
Official 13F Filings — SEC EDGAR Key personnel and Fund Overview may contain mistakes

Activity Summary — 2026 Q1

Q1 2026 13F Filed: May 13, 2026

Top Buys

% $
Stock % Impact
+0.57%
+0.31%
+0.18%
+0.14%
+0.13%
+0.13%

Top Sells

% $
Stock % Impact
-1.42%
-1.22%
-1.04%
-0.88%
-0.76%
-0.70%

Top Holdings

2026 Q1
Stock %
11.26%
5.22%
4.77%
4.62%
4.54%
4.53%
View All Holdings

Activity Summary

Latest
Market Value $382M
AUM Change -11.54%
New Positions 0
Increased Positions 29
Closed Positions 4
Top 10 Concentration +50.41%
Portfolio Turnover +1.90%
Alt Turnover +8.43%

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

ROSENBLUM SILVERMAN SUTTON S F INC /CA 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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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
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Payoff Ratio
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: ROSENBLUM SILVERMAN SUTTON S F INC /CA

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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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Underperformance Analysis — Top 10 Holdings vs SPY

Backtesting ROSENBLUM SILVERMAN SUTTON S F INC /CA's top 10 holdings against SPY identified 88 underperformance periods. Worst drawdown: 2000-09 – 2000-12 (-20.2% vs SPY, 4 quarters).

Avg. lag: -5.4% vs SPY Avg. duration: 1.9 quarters
Backtest Snapshot — Top 10 Holdings (Mn-Weighted)

The ticker-level breakdown shows how each of ROSENBLUM SILVERMAN SUTTON S F INC /CA'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: NVDA (2021 Q2 – 2025 Q4, +46.7 pts), AMZN (2021 Q2 – 2025 Q4, +7.7 pts), COST (2021 Q4 – 2025 Q4, +7.0 pts), MSFT (2021 Q2 – 2025 Q4, +5.5 pts), V (2021 Q2 – 2025 Q4, +4.1 pts) .

Strategy ann.: 6.6% SPY ann.: 8.3% Period: 1999–2026
Best Recent Contributors — Last 5Y
3 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 Q2 – 2025 Q4 • 19Q in Top 10 Beat SPY
NVDA
+998%
SPY
+78%
Contrib
+46.7%
2021 Q2 – 2025 Q4 • 19Q in Top 10 Lagged SPY
AMZN
+61%
SPY
+78%
Contrib
+7.7%
2021 Q4 – 2025 Q4 • 17Q in Top 10 Beat SPY
COST
+103%
SPY
+79%
Contrib
+7.0%
2021 Q2 – 2025 Q4 • 19Q in Top 10 Lagged SPY
MSFT
+41%
SPY
+78%
Contrib
+5.5%
2021 Q2 – 2025 Q4 • 19Q in Top 10 Lagged SPY
V
+40%
SPY
+78%
Contrib
+4.1%
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 Rosenblum Silverman Sutton S F Inc /ca invest in?
Rosenblum Silverman Sutton S F Inc employs a growth-oriented investment strategy with GARP (Growth at a Reasonable Price) characteristics, balancing appreciation potential with valuation awareness. The firm's **13F Portfolio Composition** reflects a diversified approach with selective emphasis on Technology and Healthcare sectors, naturally influenced by the Bay Area's innovation-driven economy and the principals' proximity to emerging growth companies. Under the portfolio management leadership of principals Kenneth Silverman and Steven Sutton, the strategy seeks to identify businesses with sustainable growth trajectories, competitive market positioning, and reasonable valuations relative to their growth potential. The **Sector Allocation History** accessible through platform tools demonstrates the firm's longstanding exposure to innovation-driven sectors while maintaining diversification across other market verticals for risk management purposes. Position turnover characteristics trend toward the low-to-moderate range, reflecting a conviction-based approach that allows quality growth holdings to compound over extended periods. The decades-long operational history suggests an investment philosophy that has successfully adapted to changing market conditions while maintaining core principles around growth and quality.
What is Rosenblum Silverman Sutton S F Inc /ca's AUM?
Rosenblum Silverman Sutton S F Inc /ca reported $382M 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 Rosenblum Silverman Sutton S F Inc /ca's portfolio?
Rosenblum Silverman Sutton S F Inc /ca holds 76 disclosed positions. The top 10 holdings represent +50.41% of the reported portfolio, indicating a highly concentrated investment approach.
How to track Rosenblum Silverman Sutton S F Inc /ca 13F filings?
Track Rosenblum Silverman Sutton S F Inc /ca'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 Rosenblum Silverman Sutton S F Inc /ca?
Rosenblum Silverman Sutton S F Inc /ca is managed by Kenneth Silverman (Principal & Portfolio Manager), Steven Sutton (Principal & Portfolio Manager).

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.

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