Today's pre-market stock movers: TWTR, NIU, OCGN, SBUX and more

• $Twitter (Delisted)(TWTR.US)$ +20.5% (Elon Musk discloses 9.2% passive stake)

• $Camtek(CAMT.US)$ +9.6%, $Perion Network(PERI.US)$ +6.6% (In reaction to earnings/guidance)

• $Niu Technologies(NIU.US)$ +5% (reports QI sales volume increased 9.4% yr/yr)

• $Iron Spark I Inc(ISAA.US)$ +3.4% (Hypebeast plans to list on NASDAQ through Merger with Iron Spark I)

• $Gatos Silver(GATO.US)$ +2.3% (Provides Bi-Weekly Status Report)

• $Verve Therapeutics(VERV.US)$ +1.8% (reports durable and well-tolerated editing of ANGPTL3 gene out to more than 20 months in non-human primates for potential treatment of atherosclerotic cardiovascular disease)

• $BridgeBio Pharma(BBIO.US)$ +1.4% (Presents Updated Results from Phase 2 Open-label Extension Study of Acoramidis in Transthyretin Amyloid Cardiomyopathy)

• $Lexicon Pharmaceuticals(LXRX.US)$ +1.3% (reports Sotagliflozin Improved Outcomes in Patients With and Without Prior Cardiovascular Disease in New Analysis Presented at the American College of Cardiology's 71st Annual Scientific Session)

• $DCP Midstream(DCP.US)$ +1.3% (upgraded to Outperform from In-line at Evercore ISI)

• $Curis(CRIS.US)$ -29.2% (FDA places clinical hold on TakeAim Leukemia Phase 1/2a study)

• $Ocugen(OCGN.US)$ -5.2% (World Health Organization suspends Covaxin's supply through UN agencies, according to India Today)

• $Starbucks(SBUX.US)$ -3.7% (suspends stock buyback program)

• $Alnylam Pharmaceuticals(ALNY.US)$ -1.9% (FDA has extended the review timeline of the New Drug Application for vutrisiran to allow for the review of newly added information related to the new secondary packaging and labeling facility)

• $FREYR Battery(FREY.US)$ -1.2% (announced the appointment of Oscar Brown to the position of Group Chief Financial Officer at FREYR Battery)

• $Hologic(HOLX.US)$ -2.4% (downgraded to In-line from Outperform at Evercore ISI)

• $Baxter International Inc(BAX.US)$ -2% (downgraded to Sell from Neutral at Goldman)

• $Crocs(CROX.US)$ -2% (downgraded to Hold from Buy at Loop Capital)

• $Quest Diagnostics(DGX.US)$ -1.5% (downgraded to Neutral from Buy at Citigroup)