On Monday, September 28, two companies made announcements about the same person. Meta said he was joining it, and MongoDB said he was leaving.
By the end of the day, MongoDB's stock had lost 18.5% and Meta's 4.8%. One stock fell on losing a CEO, and the other fell on the day it announced a new business direction.
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What Meta announced
On September 28 Mark Zuckerberg published a note on Meta Enterprise Platform - an arm that will sell Meta's AI technology to businesses and developers. In the note he describes it as the next "major pillar" of the business.
According to the note, the arm will start by bringing what Meta has already built to the business market: the Muse agent, Meta Business Agent, the Muse API and the Muse Code coding tool. What is being sold is Meta's models, agents and infrastructure - not ad space.
The arm will be led by Chirantan "CJ" Desai, in a new role of Chief Enterprise Platform Officer, reporting directly to Zuckerberg. Before MongoDB, Desai led product and engineering at Cloudflare, and spent nearly eight years in senior roles at ServiceNow, including President and COO.
What MongoDB disclosed
MongoDB filed a current report with the SEC that same morning, before the open. According to the filing, Desai notified the company on September 24 of his intent to resign, effective September 28, and the company stated that the decision was not due to any disagreement with it.
His interim replacement is not new: the board appointed Dev Ittycheria, who was MongoDB's CEO from 2014 until November 2025. In other words, Desai ran the company for less than a year.
And two details from the same week, from a second filing: on September 25 the board approved a $1 billion expansion of the buyback program, to a total of $2 billion, and on September 29 the company held an investor day - one day after its CEO left.
The stocks, on the day and the day after
| 9/25 | 9/28 | Change | 9/29 | Change | |
|---|---|---|---|---|---|
| MongoDB | 410.44 | 334.68 | -18.46% | 337.19 | +0.75% |
| Meta | 751.66 | 715.62 | -4.79% | 738.79 | +3.24% |
| Nasdaq 100 (ETF) | 744.50 | 736.53 | -1.07% | 737.93 | +0.19% |
Closing prices in dollars, from Yahoo Finance trading data.
On the day of the announcement about 17.9 million MongoDB shares traded - roughly 12 times the average of the four trading days before it.
Meta fell more than four times as much as the index that day. That drop is hard to attribute to the announcement alone: it came after a sharp run - from $665.75 on September 18 to $777.59 on September 24, the day after the Connect conference - and on a day when the 10-year Treasury yield rose to 5.24% and weighed on growth stocks. From the September 24 closing high to September 28, the stock fell about 8%.
The next day: Muse for Small Business
On September 29 Meta launched Muse for Small Business - an expansion of the personal agent launched on September 8, with tools for running a small business.
According to the announcement, a business owner can connect tools they already use to Muse - including Intuit's QuickBooks, Shopify, Stripe, Slack, Zoom, Canva and Notion - as well as their Facebook and Instagram business accounts and their Meta ad accounts. Meta stresses that nothing publishes, sends or spends without the user's approval. Basic use is free, with subscriptions beyond that.
Meta's stock rose 3.2% that day, and since the start of September it is up 29.1%.
Meta has been in the enterprise market before
This is not the first time Meta has tried to sell businesses something other than advertising. Workplace, its enterprise social network, ran for years - and in May 2024 Meta announced its shutdown, which was completed in May 2026.
The difference is in what is being sold. Workplace was an internal communication tool, in a market where the competitors were Slack and Teams. The new arm sells models and agents - a market where the competitors are the big cloud providers and the model companies.
What is still unknown
- No numbers. The announcement includes no revenue targets, enterprise pricing or timeline.
- No customers. No enterprise customers were announced by name.
- No reporting line. Until Meta reports the arm separately, it will not be possible to measure it.
הזווית שלי
דעה אישית של אילן אברמוב - לא ייעוץ ולא המלצה
What interests me here is what the hire signals, more than what the announcement spells out.
Selling to enterprises is an entirely different business from selling advertising. It requires a sales force, long contracts, support, and above all the trust of chief information officers. Meta did not bring someone from inside to lead this - it brought in the CEO of a public enterprise software company, with a ServiceNow background, which is exactly that world. That is a more serious signal than any slide.
But the history of Workplace is a reminder worth keeping close. Meta has tried before, and that shutdown was completed only four months ago. The difference this time is that the product is stronger - Muse reached number one in Apple's App Store - but a successful consumer product is no guarantee of a successful enterprise one.
On MongoDB's side, the question is different: a company whose CEO leaves after less than a year, straight to one of the largest companies in the world, has to explain to customers and investors what that says about it. It chose to do so at an investor day held the next day, with the previous CEO back in the role.
(To be clear: this is my personal opinion only, and nothing here is a recommendation to take any action.)
Ilan Abramov, the author, or anyone on his behalf may hold some of the securities or funds mentioned in this article.
