Calamos Investments Marks CTAG ETF Texas Exchange Debut

The firm hosted a ceremonial bell ringing to celebrate the active SMID growth fund now trading on the Texas Stock Exchange.

Updated on Oct. 29, 2026 in Investing

Isometric editorial illustration of a geometric metallic monolith rising from a stylized, arid Texas landscape, representing market growth. — Calamos Investments launched its Timpani Active SMID Growth ETF on the Texas Stock Exchange on September 21, 2026, transitioning assets to an active ETF structure. AI Illustration. Upload story photo >

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Calamos Investments celebrated the launch of its Calamos Timpani Active SMID Growth ETF, which began trading under the ticker CTAG on September 21, 2026. The new ETF serves as the successor to the company's previous Timpani SMID Growth mutual fund.

Why it matters

The fund transition aims to leverage company research to identify businesses with potential for stronger earnings while moving assets into an ETF structure. This shift allows investors to trade shares through brokerage accounts at market prices rather than through traditional mutual fund channels.

The fund maintains a mandate to invest at least 80 percent of its net assets in small- and mid-cap growth equities. Calamos Investments reported $53 billion in total assets under management as of September 30, 2026.

The players

Calamos Investments

Founded in 1977 and headquartered in Naperville, Illinois, this firm is an investment management company.

Brandon Nelson

He is the manager responsible for the oversight of the CTAG ETF.

Texas Stock Exchange

This entity provides the venue for trading activities and hosted the bell-ringing ceremony.

The details

Managed by Brandon Nelson, the fund focuses on identifying growth opportunities within the small- and mid-cap market segment. Calamos Investments, which has been in operation since 1977 and is headquartered in Naperville, Illinois, continues to utilize internal company research to drive its active management strategy.

1977: Calamos Investments was founded.
September 21, 2026: The CTAG ETF launched on the Texas Stock Exchange.
September 30, 2026: Calamos Investments reported $53 billion in assets under management.
October 29, 2026: A bell-ringing ceremony was held at the Texas Stock Exchange.

Market Dynamics

The launch of CTAG follows the broader industry trend of asset managers transitioning traditional mutual fund strategies into the more liquid ETF structure. This move mirrors competitive shifts among institutional firms seeking to capture market share within the growth equity space.

Investors can now trade the fund through brokerage accounts at market prices throughout the trading day. This change provides greater liquidity and pricing transparency compared to the previous mutual fund structure.

The takeaway

Investors looking for small- and mid-cap exposure should monitor how the transition to an ETF structure affects the fund's liquidity and operational efficiency. Active management remains a primary strategy for navigating growth equity market volatility.