Insights

Regulatory Risk SII Investments faced a Massachusetts securities regulatory complaint related to REIT sales and supervision gaps. This presents an opportunity to offer compliance and supervision automation, training, and oversight solutions to reduce future violations and protect licenses.

Growth Opportunity With a revenue band of 100M-250M and a mid-sized employee base, SII Investments sits between smaller independent brokers and large incumbents, signaling a potential for scale-focused service offerings such as cost controls, broker-dealer outsourcing, and technology modernization.

Tech Modernization Current tech stack includes Akamai, jQuery, YUI, and Akamai Bot Manager, suggesting room for modernization and cybersecurity enhancements, cloud-based advisor platforms, and fraud/bot detection upgrades to improve client and regulator confidence.

Due Diligence Needs Historical sale activity in August 2017 related to broker-dealer networks indicates ongoing M&A and integration considerations; potential for sell-side due diligence support, transition services, and technology onboarding for acquired advisors.

Competitive Position Market peers show a mix of mid-to-large firms; positioning SII as a mid-market independent broker-dealer with potential for differentiated compliance, performance analytics, and advisor support platforms to attract and retain reps seeking efficiency and risk controls.

Similar companies to SII Investments

SII Investments Tech Stack

SII Investments uses 4 technology products and services including Akamai, jQuery, YUI, and more. Explore SII Investments's tech stack below.

  • Akamai
    Content Delivery Network
  • jQuery
    Javascript Libraries
  • YUI
    Javascript Libraries
  • Akamai Bot Manager
    Security

SII Investments's Email Address Formats

SII Investments uses at least 4 email formats:
SII Investments Email FormatsExamplePercentage
First.Last@siionline.comJohn.Doe@siionline.com
92%
First_Last@siionline.comJohn_Doe@siionline.com
5%
Last.First@siionline.comDoe.John@siionline.com
2%
FLast@siionline.comJDoe@siionline.com
1%

Frequently Asked Questions

What is SII Investments's phone number?

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You can contact SII Investments's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is SII Investments's official website and social media links?

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SII Investments's official website is siionline.com and has social profiles on LinkedIn.

How much revenue does SII Investments generate?

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As of November 2026, SII Investments's annual revenue is estimated to be $100M - $250M.

What is SII Investments's SIC code and NAICS code?

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SII Investments's SIC code is 6211 - Security Brokers, Dealers, and Flotation Companies and NAICS code is 52 - Finance and Insurance.

How many employees does SII Investments have currently?

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As of November 2026, SII Investments has approximately 64 employees across 4 continents, including North America, Africa and Europe. Key team members include Vice President Relationship Management: A. H., President: A. S. and President: P. W. Explore SII Investments's employee directory with LeadIQ.

What industry does SII Investments belong to?

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SII Investments operates in the Financial Services industry.

What technology does SII Investments use?

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SII Investments's tech stack includes Akamai, jQuery, YUI and Akamai Bot Manager.

What is SII Investments's email format?

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SII Investments's email format typically follows the pattern of First.Last@siionline.com. Find more SII Investments email formats with LeadIQ.
SII Investments logo

SII Investments

Financial ServicesWisconsin, United States51-200 Employees

SII Investments is a mid-sized financial services firm based in Appleton, Wisconsin. It operates within the independent broker-dealer network space, providing a platform for securities transactions and related services to financial professionals. In September 2017, the Massachusetts Securities Division filed an administrative complaint against SII Investments over the sale of REITs and the supervision of its representatives. Public records also reference a 2017 announcement regarding the sale of the business of its independent broker-dealer network to LPL Financial LLC. The company is positioned within the broader financial services landscape as part of a cohort of independent broker-dealer distributors serving advisors and their clients, with a regional footprint in the U.S. Midwest.

Section iconCompany Overview

Phone number
SIC Code
6211 - Security Brokers, Dealers, and Flotation Companies
NAICS Code
52 - Finance and Insurance
Employees
51-200

Section iconFunding & Financials

  • $100M - $250M

    SII Investments's revenue is estimated to be in the range of $100M - $250M

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