S&P 500: -1.50% (5363 → 5282)

Nasdaq Composite: -2.62% (16724 → 16286)

Dow Jones: -2.66% (40212 → 39142)

10Y Treasury Yield: -3.56% (4.49$ → 4.33%)

VIX: -21.06% (37.56 → 29.65)

OpenAI is reportedly in early-stage development of a social media platform to compete with Elon Musk’s X (formerly Twitter) and Meta’s Instagram, spurred by the popularity of its latest image-generation tool which has strained server capacity. …

OpenAI is in talks to acquire Windsurf (formerly Codeium) — more below in Private M&A section.

Elon Musk's SpaceX, along with Palantir (PLTR) and Anduril, has emerged as a frontrunner for a key role in President Trump’s proposed Golden Dome missile defense initiative. …

Chagee Holdings (CHA), a Chinese tea chain with over 6,400 stores, raised $411 million in its Nasdaq IPO, pricing at the top of its range. …

Webull's (BULL) shares surged 375% in the first two days following its public debut on Friday, April 11, reaching a high of $79.56 on April 14 and a peak market cap of $37 billion. …

SPAC Ares II (AACT) entered into a definitive agreement to merge with Kodiak Robotics (Pre-listing: KDK), an autonomous trucking technology company, in a deal that values Kodiak at a pre-money equity valuation of approximately $2.5 billion. — PR

Figma, a design and collaboration software company, has confidentially filed for an initial public offering with the SEC, marking a significant step following the collapse of its proposed acquisition by Adobe. …

Wall Street banks are advising companies eyeing IPOs to delay their plans due to persistent market volatility caused by the trade war. Executives from Morgan Stanley and Jefferies noted that the May-June IPO window remains viable but contingent on at least a week of market stability. …

During Blackstone’s (BX) earnings call, CEO Steve Schwarzman emphasized "patience" amid a stalled IPO market and ongoing tariff-driven global trade negotiations.…

Turo Inc. is laying off approximately 150 employees, or 15% of its workforce, following the February withdrawal of its long-delayed IPO plans. …

Safe Superintelligence (SSI), the AI startup founded by former OpenAI chief scientist Ilya Sutskever, closed a $2 billion funding round at a $32 billion valuation despite having no publicly released products. …

Mainspring Energy secured $258 million in a Series F funding round led by General Catalyst to scale its linear generator power business and manufacturing operations. …

Nuclear fuel startup General Matter, founded by Founders Fund partner Scott Nolan, raised $50 million in a round led by the venture firm to develop high-assay low-enriched uranium (HALEU) for next-generation reactors. …

Ultrafast charging technology firm Nyobolt raised $30 million in a funding round led by IQ Capital and Latitude, bringing its total funding to $100 million. …

Luma Financial Technologies raised $63 million in a Series C round led by Sixth Street Growth, with participation from existing strategic investors including Bank of America, Morgan Stanley, UBS, and TD Bank Group. …

Medicare broker Chapter raised $75 million at a $1.5 billion valuation in its latest funding round. Founded in 2020 by Wharton graduates Ari Blumenfeld-Gantz and Corey Metzman, along with Vivek Ramaswamy, the company has ties to several prominent conservative figures. …

(2 additional updates: Attovia Therapeutics & Glycomine)

Summarized, curated tariff news

Deal activity and earnings updates for impacted companies

Sector and country-level filtering for focused discovery

Longevity Health Holdings (XAGE) announced a merger with 20/20 BioLabs, Inc., a provider of laboratory tests for chronic disease risk management, in an all-stock transaction. … Deal Page

RadNet has agreed to acquire iCAD in an all-stock transaction valued at approximately $103 million, offering 0.0677 RadNet shares for each iCAD share. … Deal Page

(1 additional update: XAGE)

Patterson Companies' (Delisted: PDCO) acquisition by Patient Square Capital closed ahead of the market open on April 17. …

Paychex (PAYX) completed its all-cash acquisition of Paycor HCM (Delisted: PYCR) for $22.50 per share, equating to an enterprise value of approximately $4.1 billion. — PR

SolarWinds (SWI) has completed its acquisition by Turn/River Capital in a transaction valued at approximately $4.4 billion. …

Gen Digital (GEN) announced the successful closing of its acquisition of MoneyLion (Delisted: ML) for $82.00 per share in cash, representing a transaction value of approximately $1 billion. …

Altus Power (Delisted; AMPS) has completed its all-cash acquisition by TPG through its TPG Rise Climate Transition Infrastructure strategy, valuing the company at approximately $2.2 billion, including debt. …

Capital One (COF) and Discover (DFS) have received final regulatory approvals from the Federal Reserve and the OCC for their proposed all-stock merger, having previously secured clearance from the Delaware State Bank Commissioner and obtained 99% shareholder support at both companies. …

Enfusion's (ENFN) acquisition by Clearwater Analytics is expected to close before market open on April 21. — NYSE / Deal Page

President Donald Trump reiterated his opposition to Nippon Steel's $15 billion acquisition of U.S. Steel (X), stating he does not believe a foreign company should control the iconic American steelmaker. … Deal Page

Shift4 Payments (FOUR) has extended its all-cash tender offer to acquire all outstanding shares of Global Blue Group (GB). … Deal Page

ON Semiconductor (Onsemi) (ON) has withdrawn its acquisition bid for Allegro MicroSystems (ALGM), which had most recently valued the company at $6.9 billion, or $35.10 per share. …

Vacasa (VCSA) rejected Davidson Kempner’s revised $5.83 per share unsolicited acquisition proposal. …

Mural Oncology (MURA) announced it will discontinue all clinical development of its lead candidate, nemvaleukin alfa, following unsatisfactory results in its Phase 2 (melanoma) and Phase 3 (platinum-resistant ovarian cancer) trials. …

(2 additional updates: AXDX, IRWD)

Global Payments (GPN) is acquiring Worldpay for $24.25 billion in a three-way deal involving Fidelity National Information Services and GTCR, while concurrently selling its Issuer Solutions business to Fidelity for $13.5 billion. … Deal Page

Intel (INTC) has entered into a definitive agreement to sell a 51% stake in its Altera FPGA business to Silver Lake, valuing the unit at $8.75 billion. … Deal Page

A group of banks is providing $2 billion in debt financing to Silver Lake Management for its acquisition of a 51% stake in Intel’s Altera programmable chips unit, valuing Altera at $8.75 billion. … Deal Page

Denmark's DSV (OTC: DSDVY) has received all required regulatory approvals and will complete its €14.3 billion ($16.2 billion) acquisition of DB Schenker, the logistics unit of Deutsche Bahn, on April 30, 2025. … Deal Page

OpenAI is in talks to acquire Windsurf (formerly Codeium), an AI coding assistant tool that competes with tools like Cursor, for approximately $3 billion. The potential acquisition—OpenAI's largest to date—would expand its portfolio in the competitive generative AI coding space, where it faces rivals including Microsoft, Anthropic, and xAI. Windsurf’s investors include Founders Fund, General Catalyst, Greenoaks, and Kleiner Perkins. The deal follows OpenAI’s recent $40 billion funding round at a $300 billion valuation. — CNBC / Deal Page

Activist investor H Partners, holding a 9% stake, is urging shareholders to remove three long-serving directors from Harley-Davidson’s (HOG) board—Jochen Zeitz (also CEO), Thomas Linebarger, and Sara Levinson—at the upcoming May annual meeting. …

Elliott Investment Management has acquired a stake exceeding $1.5 billion in Hewlett Packard Enterprise (HPE), making it one of HPE’s top five shareholders. …

Meta (META) CEO Mark Zuckerberg testified in a Washington trial over the FTC's antitrust lawsuit seeking to unwind Meta’s acquisitions of Instagram and WhatsApp, arguing the deals were aimed at neutralizing potential competitors. The FTC claims Meta maintains a monopoly in the social sharing space, citing internal emails and positioning WhatsApp and Instagram as strategic acquisitions to stifle competition. …

A federal judge ruled that Google (GOOG) illegally monopolized key parts of the online advertising industry, marking the second time in eight months that a U.S. court has found the company in violation of antitrust laws. U.S. District Judge Leonie Brinkema determined that Google’s control over ad exchanges and server markets broke the Sherman Antitrust Act and harmed advertisers, publishers, and consumers. …

Third Harmonic Bio (THRD) announced its board has approved a Plan of Liquidation and Dissolution, subject to stockholder approval at the June 5, 2025 annual meeting. …

Phoenix Motor Inc. (PEV --> OTC: PEVM) was delisted by Nasdaq and began trading OTC under the new symbol PEVM.

(2 additional updates: DNQAF, AWHL)