AMCU Secondary Strike Action Lonmin Plc (Incorporated in England and Wales) (Registered in the Republic of South Africa under registration number 1969/000015/10) JSE code: LON Issuer Code: LOLMI & ISIN : GB00BYSRJ698 ("Lonmin") LEI: 213800FGJZ2WAC6Y2L94 REGULATORY RELEASE 21 February 2019 AMCU Secondary Strike Action Lonmin can confirm that the Company, on Wednesday 20 February 2019, received written notice of a secondary strike action from AMCU to take place at its operations in support of the protected strike action at Sibanye Stillwater Gold Operations. According to the correspondence received, the strike will commence on Thursday 28 February 2019 until 07 March 2019. Lonmin is in the process of obtaining legal advice to inform our response to the notice. - END - ENQUIRIES Investors/Analysts: Tanya Chikanza (Executive Vice President: Corporate +44 20 3908 1073/ +27 83 391 2859/ Strategy, Investor Relations and Corporate +27 14 571 2070 Communications) Andrew Mari (Investor Relations) +27 60 564 6419 Media: TB Cardew Anthony Cardew/Emma Crawshaw +44 207 930 0777 Lonmin Wendy Tlou (Head of Communication) +27 83 358 0049 Notes to editors 1 Lonmin, which is listed on both the London Stock Exchange and the Johannesburg Stock Exchange, is one of the world's largest primary producers of PGMs. These metals are essential for many industrial applications, especially catalytic converters for internal combustion engine emissions, as well as their widespread use in jewellery. Lonmin’s operations are situated in the Bushveld Igneous Complex in South Africa, where more than 70% of known global PGM resources are located. The Company creates value through mining, refining and marketing PGMs and has a vertically integrated operational structure - from mine to market. Underpinning the operations is the Shared Services function which provides high quality levels of support and infrastructure across the operations. For further information please visit our website: http://www.lonmin.com - ENDS – Sponsor: J.P. Morgan Equities South Africa (Pty) Ltd 2 Date: 21/02/2019 10:45:00 Produced by the JSE SENS Department. The SENS service is an information dissemination service administered by the JSE Limited ('JSE'). The JSE does not, whether expressly, tacitly or implicitly, represent, warrant or in any way guarantee the truth, accuracy or completeness of the information published on SENS. The JSE, their officers, employees and agents accept no liability for (or in respect of) any direct, indirect, incidental or consequential loss or damage of any kind or nature, howsoever arising, from the use of SENS or the use of, or reliance on, information disseminated through SENS.