Get caught up quickly on the top news and calls moving stocks with these Top Fives, as compiled by the editors of The Fly. 

1. STOCK NEWS: 

• Zoom Video (ZM) will acquire Five9 (FIVN) for $200.28 per share or $14.7B in an all-stock deal [more]
• RingCentral (RNG) is sliding after the Zoom-Five9 deal [more]
  
• Ingersoll-Rand (IR) confirmed it made an acquisition proposal for SPX Flow (FLOW) [more]
  
• Pershing Square Tontine (PSTH) will not proceed with its previously announced Universal Music Group transaction [more]
  
• Robinhood (HOOD) is planning an IPO of 55M shares, sees pricing at $38-$42 per share [more]
  

2. WALL STREET CALLS: 

• Qualcomm (QCOM) upgraded to Neutral from Sell at Goldman Sachs [more]
• Alcoa (AA) upgraded to Conviction Buy from Buy at Goldman Sachs [more]
  
• Mizuho cuts Affirm (AFRM) target after survey on Apple Pay (AAPL) competition [more]
  
• Jefferies says Zoom (ZM) deal could drive short-term weakness in RingCentral (RNG) and Nice (NICE) [more]
  
• Morgan Stanley equity strategist upgrades Consumer Staples, downgrades Materials [more]
  

3. AROUND THE WEB: 

• Johnson & Johnson (JNJ) is exploring putting talc liabilities into bankruptcy, Reuters reports [more]
• Autodesk (ADSK) has ended takeover talks with Australia's Altium, Reuters says [more]
  
• Carlyle (CG) plans to buy LiveU for over $400M, TechCrunch reports [more]
  
• Tencent (TCEHY) will acquire U.K. video game developer Sumo for $1.26B, CNBC says [more]
  
• Nintendo (NTDOY) has "no plans" to launch another Switch model beyond the Switch OLED, Reuters reports [more]
  

4. MOVERS: 

• Cytokinetics (CYTK) surges after reporting the results from Cohorts 1 and 2 of REDWOOD-HCM, its Phase 2 clinical trial of CK-3773274 [more]
• NRx Pharmaceuticals (NRXP) rises after announcing a presentation that identifies a statistically significant effect of Zyesami in preventing sharp rise in cytokines, commonly associated with mortality in patients with COVID-19 [more]
  
• Ashford Hospitality (AHT) lower after completing a reverse stock split at a ratio of 1-for-10 [more]
  
• Velodyne Lidar (VLDR) declines after CEO Anand Gopalan informed the board of directors that he is stepping down as CEO and member of the board [more]
  
• Six Flags Entertainment (SIX) fell after CBS news reported a chemical incident occurred at one of Hurricane Harbor Splashtown’s attractions in Texas [more]
  

5. EARNINGS/GUIDANCE: 

• AutoNation (AN) reported better than expected Q2 earnings and revenue [more]
• Tractor Supply (TSCO) raised its FY21 earnings and revenue guidance [more]
  
• Cal-Maine Foods (CALM) reported downbeat Q4 results [more]
  
• Prologis (PLD) posted a "beat and raise" report for Q2 [more]
  
• Natera (NTRA) provided upbeat Q2 revenue guidance [more]
  

INDEXES: 

Near midday, the Dow was down 828.35, or 2.39%, to 33,859.50, the Nasdaq was down 155.92, or 1.08%, to 14,271.31, and the S&P 500 was down 74.69, or 1.73%, to 4,252.47.