MongoDB Stock Falls 12.5%, Wiping Out $4.4 Billion Despite Upgraded Guidance

MongoDB, Inc. shares dropped 12.49% in after-hours trading on Tuesday, wiping out roughly $4.36 billion in market value by 16:52 EDT, according to Nasdaq exchange data.

NEW YORK, September 1, 2026, 16:56 EDT — MongoDB (MDB.O) dropped 12.5%, erasing $4.4 billion in market value, even as the company raised its guidance.

  • At 16:52 EDT, MongoDB was at $379.97, down 12.49% from its regular session close.
  • Revenue for the fiscal second quarter increased by 30% to $771.8 million, exceeding the top end of previous guidance by 5.2%.
  • The midpoint for full-year revenue rose by $70 million to $3.01 billion, while free cash flow almost doubled.

MongoDB, Inc. NASDAQ:MDB shares dropped 12.49% in after-hours trading on Tuesday, wiping out roughly $4.36 billion in market value by 16:52 EDT, according to Nasdaq exchange data.

The decline came after a quarter that surpassed all major headlines. Revenue exceeded the previous guidance midpoint by $40.3 million. However, the midpoint for the full year increased by just $70 million.

This discrepancy serves as a benchmark for investors. MongoDB traded at $379.97, giving the company an implied equity valuation of approximately $30.6 billion. Based on 80.43 million shares share data, that puts the multiple at about 10.2 times the new revenue midpoint.

MongoDB reprices after the closing bell

USD per share; regular close through latest reported trade

$379.97 · −12.49%
$440$420$400$380 $434.21 close$379.97 16:0016:2016:4016:52

As of . Sources: Nasdaq closing and latest trade; Yahoo Finance one-minute extended-hours bars.

Quarterly revenue increased by 30% to $771.8 million. Atlas cloud revenue was up roughly 29%. Revenue from Enterprise Advanced and other segments advanced approximately 36% company earnings release.

Chief Executive CJ Desai pointed to strong performance in core enterprise workloads and initial gains in AI. “This gives us the confidence to raise our full year fiscal 2027 guidance,” he said.

The quarter’s growth and operating engine

Year-over-year growth unless noted; fiscal second quarter ended July 31, 2026

Total revenue+30%$771.8 million
Atlas revenue+29%Cloud platform
EA & other revenue+36%Self-managed and other
GAAP gross margin74%71% one year earlier
Non-GAAP operating margin24%15% one year earlier
Free-cash-flow growth+97%$137.6 million

Source: MongoDB fiscal Q2 2027 release. Non-GAAP measures exclude specified items.

Profitability gains accelerated. GAAP gross margin expanded by three points to 74%. Non-GAAP operating income surged, more than doubling to $185.9 million. Free cash flow increased to $137.6 million, compared with $69.9 million previously.

CFO Mike Berry described this as “very strong and growing operating leverage.” Remaining performance obligations climbed 91% to $1.52 billion. Current obligations were up 73% at $797.3 million.

MongoDB increased its full-year revenue outlook to a range of $2.99 billion–$3.03 billion, up from the earlier estimate of $2.92 billion–$2.96 billion. The company also boosted its non-GAAP operating income guidance by $45.3 million at the midpoint prior SEC-filed outlook.

MongoDB’s full-year outlook moves higher

Midpoints of fiscal 2027 guidance; current versus May 28 outlook

Revenue
Prior$2.94bnCurrent$3.01bn
+$70 million · +2.4%
Non-GAAP operating income
Prior$581.0mCurrent$626.3m
+$45.3 million · +7.8%
Non-GAAP diluted EPS
Prior$6.05Current$6.49
+$0.44 · +7.3%

Sources: current company guidance and May 28 SEC exhibit. Midpoints and percentage changes are calculated.

Third-quarter revenue is forecast at $756 million–$761 million, with the midpoint representing a 1.7% decline from second-quarter sales. This successive drop could account for some of the caution.

The stock finished down 4.23% at $434.21. Following the release, shares dropped an additional $54.24. Overall, from Monday’s close, the total decrease amounted to 16.2%.

Despite the decline, the stock was still 76% higher than its 52-week low. It was also trading roughly 20% below its $473.10 peak.

Risks: Prices during extended hours may reverse due to limited liquidity. MongoDB encounters competition in cloud, fluctuations in usage, risks from AI-related spending, and significant stock-based compensation.

The upcoming catalyst is scheduled for 17:00 EDT when management hosts the earnings call. Investors will look for clarification on Atlas assumptions supporting the H2 raise company events page.

Jerzy Lewandowski

Jerzy Lewandowski is a senior markets editor at TS2.tech. His coverage ranges from stocks and semiconductors to AI and the broader global markets. He studied economics at the University of Warsaw and worked in investment analysis before becoming a financial journalist. Follow Jerzy Lewandowski on Google News.

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