A tiny NVIDIA supplier has become one of 2026’s hottest microcap stocks. NN Inc (NNBR) has soared about 159% year to date after winning deals to cool NVIDIA’s AI computers. Yet the big money may be heading for the exit.

The share price keeps climbing. However, a popular gauge that tracks the flow of cash shows large investors selling, not buying. That clash is the real story.

What Sparked The Microcap Stock’s 159% Rally

NN Inc makes small metal parts, such as bearings, for cars, planes, and medical devices. In late June, it landed new NVIDIA cooling contracts to make components that stop AI data centers from overheating.

$NNBR $NVDANN Announces Significant New Awards for its NVIDIA Data Center Liquid Cooled Products Business– NN announced significant new multi-year awards for stainless-steel liquid cooling products used in NVIDIA AI data center racks. – The Data Center & Electric Grid…
— stock setter (@MarcJacksonLA) June 29, 2026

AI computers run very hot, so their chips need constant cooling. That demand turned a sleepy parts maker into an emerging AI infrastructure story, and traders piled in. The stock has since gained roughly 159%.

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The excitement is fading a little, though. Over the past five days, the stock has dropped about 3.37%, a hint that early buyers are now taking profits.

Even so, Wall Street stays upbeat. Two research firms, Noble Financial and Lake Street, expect the stock to hit a price target of $6, about 72% above today’s level.

Analyst Price Targets For NNBR Stock: TipRanks

Only B. Riley disagrees, with a hold rating and a $3 target. However, the B.Riley call was way before the Nvidia deal surfaced.

Why One Indicator Flashes A Warning

Here is where the story turns. The Chaikin Money Flow, a tool that shows whether cash is entering or leaving a stock, has dropped to -0.40. Any reading below zero means money is flowing out.

The timing matters. This gauge peaked in early June, then fell hard from June 11. It hit bottom near -0.55 on June 30, the very week NN announced its NVIDIA deals.

So this microcap stock’s price kept rising while the cash flow kept falling. The main reason was heavy profit-taking after the spike. The CMF dump was followed by a dilutive $75 million share sale that flooded the market with new stock. The share sale surfaced early July and explains why NN has been correcting over the past five days.

The CMF guage has recovered slightly since, yet it stays deep in negative ground. Put simply, the price hit new highs while large investors quietly sold.

NNBR Stock Chaikin Money Flow Turns Negative: TradingView

Options traders tell a brighter story, however. Currently, the put-to-call volume ratio sits near 0.01, meaning bullish bets, known as calls, hugely outnumber bearish ones, known as puts. A wider measure based on open contracts sits near 0.21, still bullish but up from 0.09 in early June.

NNBR Put/Call Ratio: Barchart

That small rise means more put contracts, which only pay off if the stock falls. In other words, a few traders are now buying protection against a drop. Even so, the flow still leans heavily bullish, much like the AI chip stocks this year.

What The Big Funds Actually Did

The ownership records back up that weak money flow. To see who is really buying, investors read the filings that large funds must send regulators about their stakes.

Key Holdings NNBR: BeInCrypto

The broad data is old, though. These disclosed filings lag about 47 days on average, with the newest from late April. They show a net rise of about 2 million shares, but that predates the June spike.

Institutional Activity Summary: Fintel

The freshest filings tell a cooler story, though. On July 1, activist Corre Partners cut its stake by half, to 2.15 million shares. Days later, top holder Legion Partners held steady at 6.4%, while Nomura had trimmed about 35%.

Key Investors Dumping NN: Fintel

So the newest big-money moves match the money flow gauge, both pointing to selling as the stock eases off its June high.

What To Watch Next for this NVIDIA Supplier

Two clouds still hang over the stock. In July, NN sold $75 million of new shares at $3.06, adding more supply to a market already digesting the rally.

The next fund filings, due in mid August, will reveal second-quarter moves. NN’s earnings in early August is another key date, alongside the wider NVIDIA stock price outlook.