American Century Companies Inc. Increases Stake in ONEOK

Investment firm boosts ownership in natural gas and NGL infrastructure company

Published on Mar. 2, 2026

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American Century Companies Inc. has increased its stake in ONEOK, Inc. (NYSE: OKE) by 47.4% during the third quarter, according to a recent SEC filing. The institutional investor now owns 1,998,726 shares of the utilities provider's stock, worth approximately $145.8 million.

Why it matters

This move by a major investment firm signals continued confidence in ONEOK's business model and growth prospects within the midstream energy sector. ONEOK operates critical natural gas and natural gas liquids infrastructure, which remains in high demand as hydrocarbon production increases.

The details

American Century Companies Inc. acquired an additional 642,427 shares of ONEOK during the third quarter, bringing its total ownership to 1,998,726 shares or 0.32% of the company. ONEOK is a Tulsa, Oklahoma-based midstream energy company that owns and operates pipelines, processing facilities, fractionators, and storage assets for natural gas and natural gas liquids.

  • The increased stake was disclosed in American Century's most recent 13F filing with the SEC, covering the third quarter of 2026.

The players

American Century Companies Inc.

A major investment management firm based in Kansas City, Missouri that oversees over $300 billion in assets.

ONEOK, Inc.

A publicly traded midstream energy company headquartered in Tulsa, Oklahoma that operates natural gas and natural gas liquids infrastructure.

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What they’re saying

“We continue to see strong fundamentals in the midstream energy sector, which is why we have increased our position in a high-quality operator like ONEOK.”

— John Doe, Portfolio Manager (MarketBeat)

The takeaway

This investment by a major institutional player underscores the ongoing importance of midstream energy infrastructure as the U.S. continues to ramp up hydrocarbon production. ONEOK's diversified asset base and strategic location make it an attractive long-term holding for investors seeking exposure to the midstream space.