Todd Peter Arnoldussen, Stifel Broker – What Investors in Wisconsin Need to Know
Table of Contents
Haselkorn & Thibaut, P.A. has opened an investigation into Todd Peter Arnoldussen (CRD #1929970), a financial advisor formerly registered with Stifel, Nicolaus & Company in Wisconsin. If you worked with Mr. Arnoldussen or have questions about activity in your Stifel, Nicolaus & Company account, this report is for you.
Overview: Recent Regulatory Action Against Todd Arnoldussen
In February 2026, the Financial Industry Regulatory Authority (FINRA) sanctioned Todd Peter Arnoldussen for conducting nearly 1,400 unauthorized securities transactions over a 20-month span from January 2022 through August 2023. He was suspended for two months and fined $10,000 after FINRA found he had mismarked a significant number of recommended trades as “unsolicited” – impacting the firm’s compliance and record-keeping.
These trades, executed while he was at Stifel, Nicolaus & Company in Wisconsin, created inaccurate books and records, a violation of critical FINRA Rules 4511 and 2010 governing ethical standards and accurate record maintenance.
Summary Table: Todd Arnoldussen’s Background
| Item | Details |
|---|---|
| Full Name | Todd Peter Arnoldussen |
| CRD Number | 1929970 |
| Broker-Dealer | Stifel, Nicolaus & Company |
| Location | Wisconsin |
| Years of Experience | 36+ |
| Recent FINRA Sanctions | Suspension (March 2, 2026 – May 1, 2026); $10,000 fine |
| Disclosure Events | 1 regulatory disclosure (current FINRA matter); no other customer complaints |
Key Details: FINRA’s Findings and Mismarked Trades
- Between January 2022 and August 2023, 1,399 trades were incorrectly labeled as “unsolicited” when, per FINRA’s findings, they were in fact recommended by Mr. Arnoldussen to his clients.
- This mismarking reportedly began after a customer tip—showcasing the critical role of investor vigilance.
- Why does this matter? The designation of trades as solicited or unsolicited affects supervision requirements, compliance reviews, and your rights as an investor.
- FINRA determined the inaccurate records posed risks for detecting excessive or unsuitable trading.
What Red Flags Should Investors Look For?
Haselkorn & Thibaut encourages all investors to take note of these important warning signs:
- Trades appearing on your statements that you did not discuss or approve
- Transactions marked as “unsolicited” when your advisor actually recommended them
- Rapid or frequent trading (sometimes referred to as “churning”)
- Account documentation that is inconsistent with your instructions or investment objectives
If you see any of these red flags, you might have recovery options through FINRA arbitration against the brokerage firm—even if the individual advisor faces sanctions.
Frequently Asked Investor Questions
- Is this Todd Arnoldussen’s only regulatory issue?
As of the most recent review, no prior customer complaints, arbitrations, or regulatory actions are reported for Mr. Arnoldussen other than this current FINRA proceeding. See his BrokerCheck summary here. - Is the firm also held responsible?
Yes, brokerage firms like Stifel, Nicolaus & Company can be liable for improper supervision or failing to maintain accurate records, not just the individual advisor’s actions. - How long do I have to take action?
Most FINRA arbitration claims must be brought within six years, though some circumstances may have shorter deadlines.
Todd Arnoldussen – Qualifications and Registration History
- Registered as a broker and investment adviser in Wisconsin for over three decades
- Employed at Stifel, Nicolaus & Company from 1999 to 2026
- Past affiliations include Everen Securities, Inc. and Blunt Ellis & Loewi Incorporated
- Passed securities qualification exams such as Series 7 and Series 63 (investors should verify the most current licenses on BrokerCheck)
What If I Suspect Unauthorized or Improper Trading?
Unauthorized trading occurs when your brokerage account is traded without your express approval, unless you have a written discretionary agreement on file. Mismarking recommended trades as “unsolicited” can conceal problematic activity and may make it harder for the firm to identify risks or prevent harm.
If you believe your account was involved in unauthorized trading, received unsuitable recommendations, or records were not properly maintained, you may have a potential claim. Haselkorn & Thibaut has decades of experience helping investors pursue financial losses caused by brokerage misconduct.
Why Contact Haselkorn & Thibaut?
- 50+ years’ combined experience representing investors nationwide
- 98% success rate and millions of dollars recovered for clients
- All claims handled on a “no recovery, no fee” basis
- National reach, including Wisconsin and all states
Our investigation into Todd Peter Arnoldussen and Stifel, Nicolaus & Company is ongoing. If you have concerns or have noticed unusual account activity, do not wait.
Next Steps – Free Confidential Consultation
If you were a client of Todd Arnoldussen at Stifel, Nicolaus & Company and have questions about trading in your account, schedule your free, confidential consultation now.
Call Haselkorn & Thibaut at 1-888-885-7162 or visit www.investmentfraudlawyers.com today.
No recovery, no fee. Protect your investments and your peace of mind.
