Cardlytics: The Most Complicated Micro-cap on the Market
And Why It’s Rising Again
Recently, I wrote about Cardlytics as one of the most underrated marketing platforms in the world — a company with huge potential, unique data, and an almost monopolistic position in the card-linked industry. I still stand by that. The model that connects advertisers, banks, and consumers through transaction data remains incredibly powerful. CDLX has access to six trillion transactions per year, low fixed costs, and the ability to scale almost without additional investment. These are traits very few digital advertising companies can replicate.
But on the other hand, there’s a thin line between a brilliant idea and a complete disaster. Three CEOs in just a few years, two disastrous acquisitions, lost key partners, upcoming debt maturities in 2028 and 2029, and communication that often feels like a puzzle.
And yet — the stock is rising again.
In the past few weeks, Cardlytics has exploded after Citron Research suddenly changed its tone — hinting at a potential turnaround in the company. At the same time, we’re seeing the first real signs of stabilization: lower costs, a growing number of active advertisers, Starbucks returning, and surprisingly, some new form of continued collaboration with Chase, even though it once seemed completely over. A lot is suddenly moving.
In this post, I’ll take a closer look at what’s really going on with Cardlytics:
Citron Research
The Good, The Bad, and The Ugly
Can They Survive?
My Portfolio Update — What I’m Doing with CDLX
Let’s get into it.
Citron Research
Cardlytics is a small, forgotten, and illiquid micro-cap company that was trading around $1 per share in mid-September, with a market capitalization of roughly $70 million. Then came a single tweet from Citron Research, highlighting CDLX’s advantages compared to Opendoor.
What followed was extraordinary: the stock — which normally trades under one million shares per day — suddenly saw over 120 million shares traded in just one day. In other words, the company’s entire ownership effectively changed hands twice in a single day.
For a business this small, that’s not normal market activity — that’s a full-scale reset of who owns the stock. A forgotten micro-cap suddenly turned into one of the most actively traded names on Nasdaq, all because of a single tweet.
So who exactly is Citron, and why did their post cause such a shockwave?
