Twitter And 20 Stocks Moving Premarket Gainers Seritage Growth Properties (NYSE: SRG ) rose 35.7% to $8.25 in pre-market trading after gaining around 10% on Thursday. Seritage Growth Properties filed its preliminary proxy materials with the U.S. Securities and Exchange Commission. Insignia Systems, Inc. (NASDAQ: ISIG ) rose 33.1% to $10.78 in pre-market trading after gaining around 6% on Thursday. Allena Pharmaceuticals, Inc. (NASDAQ: ALNA ) rose 27.4% to $0.2689 in pre-market trading after gaining around 19% on Thursday. Allena Pharmaceuticals recently announced rescheduling of special meeting to approve reverse stock split. Aprea Therapeutics, Inc. (NASDAQ: APRE ) rose 18.9% to $0.9511 in pre-market trading. Wedbush initiated coverage on Aprea Therapeutics with an Outperform rating and announced a price target of $3. Clovis Oncology, Inc. (NASDAQ: CLVS ) rose 12.4% to $2.44 in pre-market trading. Clovis Oncology said on July 1, it had a Type A meeting with the FDA. Aqua Metals, Inc. (NASDAQ: AQMS ) rose 11.3% to $0.8575 in pre-market trading.