Amarin Corp Plc\uk (AMRN)

As of 30 September 2026, short interest in AMRN is 528,373 shares, up 17,371 shares over the last month. Over the last 48 readings it ranged from 341,942 shares (15 October 2025) to 18,719,684 shares (31 December 2024). The latest reading sits at the bottom of that range. At the reported average volume of 50K shares a day that is 10.5 days to cover.

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As of 23 October 2026, the short share of AMRN volume is 33.1%, down 6.9 points over the last five sessions. Over the last 30 readings it ranged from 20.6% (15 October 2026) to 63.5% (23 September 2026). The latest reading is 9.9 points below the 30-session average of 43.1%, on 37K shares reported.

As of 23 September 2026, the fails-to-deliver balance in AMRN is 65 shares, up 31 shares over the last settlement date. Over the last 30 readings it ranged from 16 shares (20 May 2026) to 2,748 shares (5 June 2026). The latest reading sits at the bottom of that range.

No open-market insider trades were reported for AMRN in the last 90 days. The most recent filings are listed below. Latest filing: Fishman Peter L. (SVP, CFO) on 2026-08-01.

Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.

2 holders report 5% or more of AMRN in their latest filing, all on Schedule 13D (active intent). The largest reported stake is Sarissa Capital Management LP at 6.1% of the class (25,743,900 shares), filed 2026-08-27 for an event on 2026-08-25.

4 of the 30 tracked managers held AMRN at their latest 13F, $5.7M in total at quarter-end prices. Millennium Management is the largest at $1.8M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 2 added shares and 2 cut.

Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.

In Q2 FY 2026 (quarter ended 2026-06-30) Amarin Corp Plc\uk reported revenue of $42.2M, down 42.0% from the same quarter a year earlier, and net loss of $7.7M (-0.02 diluted EPS). In FY 2025 it generated $6.7M of operating cash flow.

Quarterly, last 8 quarters

Fiscal years, with buybacks and dividends

Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2013-02-20 from the cover page.