---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-23-016878"
form_type: "8-K"
ticker: "AMRN"
cik: "0000897448"
company_name: "AMARIN CORP PLCUK"
filed_at: "2023-05-03T23:59:59+00:00"
generated_at: "2026-06-16T02:13:19.222363+00:00"
event_type: "earnings"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Amarin Q1 revenue $86M (-9% YoY); lowers FY2023 opex guidance to $270-285M

## Summary
- U.S. net product revenue $82.3M (-7% QoQ); generic competition impacts volume and price.
- GAAP net loss $16.5M ($0.04 loss per share) vs loss $31.6M YoY; adjusted net income $7.6M.
- Gross margin 55% (70% excluding $12.3M supplier amendment charge) vs 76% prior year.
- Lowered 2023 operating expense guidance to $270-285M from $290-305M; cash $304.9M.
- Europe early launch VAZKEPA in UK, Sweden, Finland; CSL Seqirus partnership for Australia/NZ.

## SEC filing metadata
- accession: 0000950170-23-016878
- form_type: 8-K
- ticker: AMRN
- cik: 0000897448
- company_name: AMARIN CORP PLCUK
- filed_at: 2023-05-03T23:59:59+00:00
- event_type: earnings
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/897448/000095017023016878/0000950170-23-016878-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/897448/000095017023016878/amrn-20230503.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-23-016878
- JSON: https://secwatch.observer/filing/0000950170-23-016878.json
- Plain text: https://secwatch.observer/filing/0000950170-23-016878.txt

## Key facts
- Earnings Releases
  AMARIN CORP PLCUK updated its the quarter ended March 31, 2023 guidance (lowered).
  - Period: the quarter ended March 31, 2023
  - Guidance: lowered
  - Result: reported results
  source text: On May 3, 2023, Amarin Corporation plc (“ Amarin ”) issued a press release announcing its financial results for the three months ended March 31, 2023 (the “ Press Release ”). A copy of the Press Release is furnished herewith as Exhibit 99.1.
  evidence_url: https://www.sec.gov/Archives/edgar/data/897448/000095017023016878/0000950170-23-016878-index.htm

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