Manufacturing. Accelerated.

• Additive market estimated to grow 11x to $146B(1) this decade [01] addressable market • Propelled by a shift from prototyping to mass production. Desktop Metal is the only pure-play Additive 2.0 public opportunity Large & expanding • Strong secular tailwinds around re-shoring manufacturing and supply chain flexibility • World-class [02] • management team Team with public market, investing and M&A experience across 60+ transactions - Deep scientific pedigree — founding team includes 4 MIT professors Board of directors with a track record of investing in and advising category disrupters [03] Industry-leading, defensible technology platform • . Fastest 3D printing platform, up to 100x the speed of legacy technology (2) Advanced sintering & software capabilities combined with differentiated materials platform Broad technology portfolio with over 120 patents issued or pending Global distribution [04] • & broad customer adoption • [05] Compelling unit economics & attractive financial profile • • Prolific distribution in 60+ countries around the world • • Demonstrated customer demand across a diverse array of industries with no account concentration Production System™ reservations provide critical technology validation & revenue visibility through early 2024(3) High-margin recurring revenue streams including consumables and services Gross margin improvements and operating leverage drive profitability • Organic growth funded with pre-transaction balance sheet cash Opportunity to accelerate growth trajectory with transaction proceeds via industry consolidation • [06] Inorganic upside potential through consolidation • $2B of estimated inorganic revenue identified across 60+ potential targets 1. 2. D Desktop Metal ~$625M on pro forma balance sheet (4) enables optionality to enhance growth, profitability and diversification Source: Wohlers Report 2020 (2020 - 2029 forecast); 2030 figure based on management calculations. Based on published speeds of binder jetting and laser powder bed fusion systems comparable to the Production System TM available as of August 25, 2020 and using comparable materials and processing parameters. 3. Assumes 100% conversion of existing reservations to orders. 4. Assumes no redemptions by Trine Acquisition Corp's existing shareholders and transaction expenses of approximately $49M. See slide 33 "Detailed transaction overview" for key assumptions and additional details. 31

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