---
schema_version: "secwatch.filing_event.v1"
accession: "0001388658-24-000013"
form_type: "8-K"
ticker: "IRTC"
cik: "0001388658"
company_name: "iRhythm Holdings, Inc."
filed_at: "2024-02-22T23:59:59+00:00"
generated_at: "2026-06-05T18:52:26.262402+00:00"
event_type: "earnings"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# iRhythm Q4 rev $132.5M (+17.7% YoY); net loss $38.7M; FY2024 guidance $575-585M

## Summary
- Revenue $132.5M in Q4 2023, up 17.7% YoY; full-year revenue $492.7M, up 19.9%.
- Net loss Q4 $38.7M ($1.26 diluted EPS), widened from $20.2M loss a year ago; FY loss $123.4M.
- Gross margin fell to 66.0% in Q4 from 69.9% YoY, due to scaling costs and Zio monitor launch.
- Adjusted EBITDA Q4 $2.4M (improved $1.3M); FY adjusted EBITDA -$4.9M, improved $6.4M.
- FY2024 guidance: revenue ~$575-585M, gross margin 68-69%, adj. EBITDA margin 3-4%.

## SEC filing metadata
- accession: 0001388658-24-000013
- form_type: 8-K
- ticker: IRTC
- cik: 0001388658
- company_name: iRhythm Holdings, Inc.
- filed_at: 2024-02-22T23:59:59+00:00
- event_type: earnings
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1388658/000138865824000013/0001388658-24-000013-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1388658/000138865824000013/irtc-20240222.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001388658-24-000013
- JSON: https://secwatch.observer/filing/0001388658-24-000013.json
- Plain text: https://secwatch.observer/filing/0001388658-24-000013.txt

## Key facts
- Earnings Releases
  iRhythm Holdings, Inc. updated its the fourth quarter and full year ended December 31, 2023 guidance (initiated).
  - Period: the fourth quarter and full year ended December 31, 2023
  - Guidance: initiated
  - Result: reported results
  source text: On February 22, 2024, iRhythm Technologies, Inc. issued a press release regarding its financial results for the fourth quarter and full year ended December 31, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1388658/000138865824000013/0001388658-24-000013-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.