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Abnormal Security Funding Rounds & Valuation History (2020–2024)

Private Valuation & Funding Round Tracker · Abnormal Security

Abnormal Security funding rounds & valuation history

Abnormal Security (now branded Abnormal AI), the San Francisco cybersecurity company using behavioural AI to stop email attacks and account takeovers. Funding from the Series B (Nov 2020) to the Series D (Aug 2024), sourced to Abnormal Security, CNBC, Crunchbase News and SecurityWeek.

Last updated: (IST). Every figure re-checked against the linked sources that day. Rows: 3 Currency: US$, nominal
⬇ Download CSV Cite this dataset Methodology & status definitions
Last closed round Closed
$5.1B
$250M Series D, Aug 2024
Raised in rounds listed
$510M
Sum of 3 closed rounds with a disclosed amount (GNF calc.)
Largest round
$250M
Series D, Aug 2024
Closed rounds listed
3
Nov 2020 to Aug 2024

Round history

Newest first. Dashed badges and striped rows are not closed transactions. “—” means the source does not disclose the figure or it cannot be computed on the same basis; see the note in each row.

Showing 3 of 3 rows
Abnormal Security funding rounds, Nov 2020 to Aug 2024
DateStatusRoundAmountLead / buyerValuationVal. ÷ run-rateSource
Closed round
Series DThe company described $250M as total expected proceeds.
$250M
Wellington Management
$5.1BStated by Abnormal Security1.27× vs prior closed
—Not disclosedNo run-rate stated in the announcement
Abnormal Security, 6 Aug 2024Also: CNBC, 6 Aug 2024, Crunchbase News, 6 Aug 2024
Closed round
Series CWith Greylock Partners and Menlo Ventures.
$210M
Insight Partners
$4BStated by Abnormal Security
—Not disclosedNo run-rate stated in the announcement
Abnormal Security, 10 May 2022Also: SecurityWeek, May 2022
Closed round
Series BGreylock participated.
$50M
Menlo Ventures
Not disclosedNo company valuation stated by the source
—Not disclosedNo run-rate stated in the announcement
Abnormal Security, 18 Nov 2020
Step-up = valuation ÷ the prior closed valuation (GNF calc.), shown only where both figures were stated or reported and neither is a lower bound.

Valuation at each closed round

Valuations as stated or reported at each closed round with a disclosed figure; talks, tenders and filings are not plotted.

Sources: Abnormal Security, CNBC, Crunchbase News, SecurityWeek. US$ billions, linear scale.

Timeline

Each round and share sale, oldest first.

  1. 18 Nov 2020 · Closed

    Series B: $50M led by Menlo Ventures.

  2. 10 May 2022 · Closed

    Series C: $210M at $4B led by Insight Partners.

  3. 6 Aug 2024 · Closed

    Series D: $250M at $5.1B led by Wellington Management.

Preparing for an IPO, not filed publicly: CNBC reported in January 2025 that Abnormal hired a CFO as it began preparing for an IPO. No public registration statement, listing or pricing had been announced as of 14 Nov 2026.

Cite this dataset

Free to quote with a link back. Copy this citation:

Abnormal Security Funding Rounds & Valuation History. Private Valuation & Funding Round Tracker, GrowthNavigateFunding.net, updated 14 Nov 2026. https://growthnavigatefunding.net/funding/abnormal-security/

Download the data

The same 3 rows as the table: numeric US$ columns, empty cells where a figure is not disclosed, and a source URL for every row.

File
abnormal-security-rounds.csv (UTF-8, comma-separated)
Stable URL
https://growthnavigatefunding.net/wp-content/uploads/2026/11/abnormal-security-rounds.csv
Columns
id, date, date_precision, status, transaction_type, round, amount_usd_low, amount_usd_high, lead_or_buyer, co_leads, valuation_usd_low, valuation_usd_high, valuation_basis, valuation_to_run_rate_multiple, multiple_bound, multiple_basis, step_up_vs_prior_closed, price_per_share_usd_low, price_per_share_usd_high, shares, source, source_url, other_source_urls, notes, last_updated
Updated
(IST)
⬇ Download CSV

Methodology & status definitions

How each row is labelled and calculated.

Closed round

A primary round announced by the company or confirmed in the press, bringing new money to the company.

Valuation ÷ run-rate

Post-money valuation ÷ the run-rate the company stated in that announcement (GNF calc.). Where the run-rate is “crossed” or “over” a figure, the multiple is shown as “under X×”. No row qualifies here unless shown, so no multiple is invented.

What is not a separate row

The Series A, employee tender offers, and secondary sales.

Updates & corrections

This page stays at one address and is updated in place; the “Last updated” date above drives the citation and the dataset metadata. Corrections: hello@growthnavigatefunding.net. Informational only; not investment advice.

Changelog

  • : Dataset first compiled (AI-50 batch, not yet published).

Sources

  1. Abnormal Security: AI-Native Human Behavior Security Leader Abnormal Security Announces $250 Million Series D Financing at a $5.1 Billion Valuation, 6 Aug 2024
  2. CNBC: Abnormal Security, valued at $5.1 billion amid email security push, eyes eventual IPO, 6 Aug 2024
  3. Crunchbase News: Cybersecurity Startup Abnormal Security Locks Up $250M At $5.1B Valuation, 6 Aug 2024
  4. Abnormal Security: Abnormal Security Raises $200M+ at a $4B Valuation To Protect The Modern Enterprise Workforce, 10 May 2022
  5. SecurityWeek: Email Security Firm Abnormal Security Raises $210 Million at $4 Billion Valuation, May 2022
  6. Abnormal Security: Abnormal Security Raises $50M in Series B Funding, 18 Nov 2020