What happened: Applied Materials (AMAT) said after the U.S. close on Monday, October 26, 2026, that it will raise its stake in Dutch chip-equipment maker BE Semiconductor Industries (Besi, Euronext Amsterdam: BESI) to approximately 20% of Besi's outstanding shares. The press release crossed at 4:30 p.m. ET (1:30 PM PT), and Applied filed it with the SEC on a Form 8-K the same day. The key points from Applied's own documents:

  • Structure: Applied entered into an accelerated share purchase agreement to acquire Besi shares. Combined with its existing holding, it would own about 20% of Besi after the purchase.
  • Condition: delivery of the shares is subject to the expiration or termination of the waiting period under the U.S. Hart-Scott-Rodino (HSR) antitrust act.
  • Intent: Applied said it views the investment as long term, currently has no intention to go beyond approximately 20%, and does not intend to seek board representation at Besi.
  • Rationale: the companies have collaborated since 2020 on hybrid bonding, and Besi recently joined Applied's EPIC Center as an innovation partner. The expanded work covers 3D IC scaling, logic-memory integration, thermo-compression bonding and die-on-wafer, die-on-die and die-on-panel integration. Prabu Raja, president of Applied's Semiconductor Products Group, said hybrid bonding and next-generation interconnects are becoming "increasingly critical enablers of energy-efficient AI compute performance."

    • What was not disclosed: Applied did not state the number of shares, the price or the total cost of the purchase, and neither document gives an expected closing date beyond the HSR condition. Reuters reported the stake rises from 9%, which Applied bought in April 2025, making it Besi's largest shareholder. Bloomberg also put the initial stake at 9% and Besi's market value at about $13 billion. We have not seen an official price for the additional shares, so we do not estimate one here.

    Market context: Besi shares closed at €146.35 in Amsterdam on Monday, up 0.86%, before the announcement, and MarketScreener showed an indicative after-hours quote of €153.18, about 4.7% higher. Indicative quotes outside the regular session can be thin, so the Euronext Amsterdam open at 9:00 a.m. CET (1:00 AM PT Tuesday) is the first real test. The stock had fallen sharply after Besi's Q3 update last week, when record orders were paired with a cautious Q4 outlook and investors worried about the pace of hybrid bonding adoption and competition, according to ABM Financial News. We did not find a widely reported after-hours move in AMAT shares tied to the announcement.

    Educational content only, not financial advice. Options involve significant risk and are not suitable for every investor.

    A Stake Increase Is Not a Takeover

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    This is a minority investment, not an acquisition, and Applied has explicitly said it does not plan to go beyond about 20% or seek a board seat. That matters for options traders in two ways:

  • No takeover premium is on the table. Merger-arbitrage dynamics, where the target trades near a fixed deal price and its implied volatility collapses, do not apply. Besi will keep trading on its own fundamentals, with Applied as a large holder.
  • No contract adjustment. Options on AMAT are not adjusted for a share purchase like this. Adjustments happen for events such as mergers, spinoffs and special dividends; see our explainer on options contract adjustments for mergers and special dividends.

    • Besi itself has no listed U.S. options, so U.S. options traders feel this mainly through AMAT and the broader semiconductor-equipment group.

    Why This Matters for AMAT Options Traders

    1. Small for Applied, bigger for Besi. Using Bloomberg's figures, an extra 11 percentage points of a company worth about $13 billion is small relative to Applied's size, so the purchase is unlikely to move AMAT's fundamentals on its own. The headline is more meaningful as a strategic signal about advanced packaging and hybrid bonding. Expect the larger percentage reaction in Besi, not AMAT.

    2. Headline risk tends to be a one-day event in the bigger stock. For an acquirer or investor of Applied's size, implied volatility usually reacts little to a stake headline. Near-dated AMAT IV is more likely to be driven by sector news this week, including big tech earnings and the Fed decision, and by Applied's own upcoming quarterly report. Check Applied's investor relations site for the confirmed earnings date before trading short-dated options around it.

    3. Regulatory timing is open-ended. HSR waiting periods can expire on schedule or be extended if regulators ask for more information. Applied has not given a closing date, so traders should not assume a specific completion date.

    4. Packaging is a crowded AI theme. Advanced packaging has been a recurring options-market theme, including TSMC's reported CoWoS price-hike plans, which we covered here. Correlated semiconductor moves can matter more for AMAT options than this single headline.

    Common Ways Traders Think About This Setup (Educational)

  • Separate the stock-specific signal from the sector. Traders often compare AMAT's move with semiconductor ETFs such as SMH or SOXX to see whether a reaction is company-specific or sector-wide.
  • Compare implied and realized volatility. Before buying or selling premium on a headline, traders check implied versus historical volatility.
  • Use defined risk around stacked catalysts. Vertical spreads limit loss if a busy macro and earnings week produces bigger moves than expected.
  • Read the risk disclosures. The OCC options disclosure document explains exercise, assignment and adjustment rules.

    • Key Takeaways

  • Applied Materials agreed on October 26, 2026, to raise its Besi stake to about 20% through an accelerated share purchase, subject to U.S. HSR antitrust clearance.
  • Applied said it views the stake as long term, has no current intention to go above about 20% and will not seek a Besi board seat.
  • The price, share count and timing of the purchase were not disclosed. Reuters and Bloomberg reported the stake rises from 9%.
  • For AMAT options, this is a strategic headline rather than a deal that changes contract terms. Sector moves and Applied's own earnings are likely bigger IV drivers.

    • Sources

  • Applied Materials: Applied Materials to Increase its Strategic Investment in BE Semiconductor Industries (GlobeNewswire, Oct. 26, 2026)
  • Applied Materials Form 8-K filed Oct. 26, 2026
  • Reuters via Investing.com: Applied Materials to raise BESI stake to about 20%
  • Bloomberg: Applied Materials Boosts BE Semiconductor Stake to About 20%
  • MarketScreener: BE Semiconductor Industries quote page
  • ABM Financial News via IEX: Berenberg says Besi offers a buying opportunity (Dutch)
  • OCC: Characteristics and Risks of Standardized Options

    • By the OptionsPilot Editorial Team. Published October 26, 2026, 11:22 PM PT. This article is for education only and is not investment advice. Options involve risk and are not suitable for all investors.