Biggest News-Driven Stock Movers — Aug 17, 2026
News-driven movers were led by a corporate filing and several legal-investigation headlines.
- SM (+4.5%; +5.0% vs SPY): SM Investments Corporation filed a 2026 Amended General Information Sheet (as of Aug. 14, 2026).
- IRON (+1.9%; +2.4% vs SPY): Rosen Law Firm encouraged Disc Medicine investors to inquire about a securities class action investigation.
- COHN (-2.7%; -2.3% vs SPY): Cochlear Ltd. published its 2026 Annual / Sustainability Report.
- HHS (-2.3%; -1.9% vs SPY): Shareholder-deal fairness question circulated: “Are MITT, ARX, HHS, FULC Obtaining Fair Deals for their Shareholders?”
- MANH (+1.2%; +1.6% vs SPY): Rosen Law Firm announced an investigation into alleged breaches of fiduciary duties by Manhattan Associates directors and officers.
- HLX (+1.2%; +1.6% vs SPY): Shareholder-deal fairness question circulated: “Are DSGR, HLX, ATAI, CRNX Obtaining Fair Deals for their Shareholders?”
- FULC (+0.8%; +1.2% vs SPY): Shareholder-deal fairness question circulated: “Are MITT, ARX, HHS, FULC Obtaining Fair Deals for their Shareholders?”