Neutra Corporation (NTRR)

[delerious1]

More likely it's HFT's

"First, let’s get out of the way what we’re actually talking about: High-Frequency Trading (HFT) can be defined as using an automated trading system that uses complex algorithms to scan markets for even the smallest of opportunities, execute millions of orders at speeds faster than the traditional market participants.

Often they make only a small profit on each transaction but by being super fast and placing vast amounts of orders they nonetheless generate large returns."

https://www.planetcompliance.com/introduction-hft-industry-top-20-hft-firms-world/

"South Korea fines US brokerage $9.6 million for high-frequency trading
The Securities and Futures Commission judges that Citadel Securities disrupted market order"

https://www.kedglobal.com/ecm-dcm/newsView/ked202301270005