Last Updated: November 2025 — Lexington, SC
Here’s what you need to know about Lexington, SC stockbroker Katherine Nishnic:
- Name: Katherine Greer Nishnic
- Alias: Katherine Greer Martinson, Katherine Diane Nishnic
- Current Employer: Centaurus Financial, Inc. — branch office at 4580 Sunset Blvd., Lexington, SC 29072; registered with Centaurus since 05/19/2015.
- Prior Firms: J.P. Turner & Company, L.L.C. (2010–2015); GunnAllen Financial, Inc. (2008–2010); First Allied Securities, Inc. (2000–2008); D.E. Frey & Company, Inc. (1997–2000); Merrill Lynch, Pierce, Fenner & Smith Incorporated (1994–1997).
- Other Business Affiliations: COLA Wealth Advisors (DBA for marketing/branding); Mantei & Associates (branding/administrative; payroll/benefits).
- CRD number: 2499553.
- Stockbroker / Financial Advisor. Currently registered with FINRA as a General Securities Representative; licensed in multiple states.
- Can Broker be Sued in FINRA: Yes
- Highest Award or Settlement: $180,000 (eight settled cases)
If you’ve sustained damages from Mr. Nishnic, discuss your case with experienced investment fraud lawyer Bob Rex at (877) 224-3199 for a free consultation.
Did You Lose Money With Katherine G. Nishnic As Your Stockbroker?
Ms. Nishnic discloses multiple customer disputes that alleged unsuitable recommendations, misrepresentation/omissions, and breach of fiduciary duty in connection with corporate debt and real-estate/alternative securities, including:
- FINRA Case No. 23-01013 (April 2023) — Centaurus Financial, Inc.; allegations of unsuitable, high-risk, speculative and illiquid investments; settled $40,000 on 03/06/2024.
- FINRA Case No. 19-01298 (May 2019) — J.P. Turner & Co./Centaurus; unsuitable investments;settled $180,000 on 09/01/2020.
- FINRA Case No. 19-01504 (May 2019) — JP Turner & Centaurus; unsuitable investments/breach of fiduciary duty; settled $82,500 on 09/21/2020.
- FINRA Case No. 19-02273 (September 2019) — JP Turner/Centaurus; mismanaged/misrepresented unsuitable investments; settled $55,000 on 07/16/2020
- FINRA Case No. 18-03810 (November 2018) — JP Turner/Centaurus; unsuitable investments; settled $55,000 on 11/19/2019.
- FINRA Case No. 19-01250 (May 2019) — JP Turner/Centaurus; unsuitable investments; settled $57,500 on 08/17/2020.
- FINRA Case No. 19-02386 (August 2019) — JP Turner/Centaurus; misrepresented unsuitable investments/breach of fiduciary duty; settled $7,500 on 10/22/2020.
More on REITs and Other Alternative Investments
Allegations of Broker Misconduct Against Katherine G. Nishnic
- Unsuitability. Customers alleged recommendations inconsistent with their objectives and risk tolerance — FINRA Rule 2111 (Suitability) requires a reasonable basis for recommendations and alignment with a customer’s investment profile.
- Breach of Fiduciary Duty / Best-Interest Obligations. For retail recommendations after June 30, 2020, allegations may implicate SEC Regulation Best Interest (Exchange Act Rule 15l-1), which requires acting in the customer’s best interest when making recommendations.
- Misrepresentation or Omission of Material Facts. Such allegations are often evaluated under FINRA Rule 2020(prohibiting manipulative or deceptive devices) and FINRA Rule 2010 (standards of commercial honor).
- Concentration in Illiquid/Alternative Products. Several disputes reference corporate debt and real-estate/alternative securities, which can present liquidity and risk issues for certain investors.
Recover Your Investment Losses Now With Rex Securities Law
Other investigations of Centaurus Financial brokers
If you have suffered investment losses in an account handled by Katherine Greer Nishnic, contact us for a complimentary consultation with an experienced securities lawyer to learn how you may be able to recover damages through FINRA arbitration.
Firms We Have Pursued On Behalf of Our Clients
With offices in Boca Raton, FL, and Austin, TX, stockbroker fraud attorney Bob Rex provides representation to investors nationwide who are seeking recovery of investment losses due to the negligence or fraud of stockbrokers, financial advisors, and broker-dealers.
If you have questions about how your account has been handled, call (877) 224-3199 to speak with an experienced securities attorney at no cost to you.
Most cases are handled on a contingent fee basis, meaning that you do not pay legal fees unless we are successful.