🐋 ARM $29M Deep-ITM Call — Open Interest CONFIRMS a Second Open: Whale Now Holds 10,000 Contracts ($60M) on the Aug 21 $170

Date: May 15, 2026 | Spot: $211.61 | Order Type: BTO — CONFIRMED by open interest (OI rose +5,021 to 10,746 on the May 18 OPRA snapshot — a clean second open, not a close) | OI resolution posted: May 18, 2026

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✅ RESOLVED — Open Interest Confirms This Was a Second OPEN (Updated May 18, 2026)

When this article first published on May 15, the directional read was genuinely ambiguous: the 5,000-contract ARM August 21 $170 call block that printed at 10:09 ET filled at MID (not ASK) and carried Vol/OI ≈ 0.88 (below 1.0). That left open the possibility the print was closing the May 13 long rather than adding to it. We told readers to size nothing until the post-trade OPRA open-interest snapshot landed. That snapshot is now in, and it resolves the question decisively.

The May 15 print added +5,021 to open interest on a 5,000-contract trade. That is a textbook OPEN (BTO), not a close. Had this been the May 13 long being unwound, OI would have fallen by ≈5,000 back toward the ≈776 baseline. Instead it nearly doubled. Both legs are now independently OI-confirmed:

• May 13: OI 776 → 5,765 (+4,989) — first 5,000-contract long opened
• May 14: OI held at 5,725 — the May 13 long was not unwound ahead of the second print
• May 15: OI 5,725 → 10,746 (+5,021) — second 5,000-contract long opened

The whale now holds a confirmed ≈10,000-contract, $60M deep-ITM long-call book on the August 21 $170 strike. The "two-day institutional accumulation" thesis in the rest of this article is no longer a contingent hypothesis — it is confirmed by open interest. Read everything below as a confirmed accumulation.

Timing note: the original article said to check "tomorrow's OI snapshot (May 16)." That was a calendar error — May 16–17 was a weekend, and OPRA does not disseminate open interest on non-trading days. The resolving snapshot (reflecting the May 15 close) posted the next trading morning, Monday May 18 at ≈06:30 ET, and is the data shown above.

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Quick Take

At 10:09:21 ET on May 15, 2026, the same deep in-the-money call structure that printed for $31 million two days ago appeared again. A single institution paid $29 million for another 5,000 contracts of the ARM August 21, 2026 $170 call — a stock-replacement structure with a delta of approximately 0.90, meaning the option moves nearly dollar-for-dollar with the underlying stock.

The $170 strike sits $41.61 in the money at the time of the print — roughly 20% ITM. That depth of moneyness is not an accident. It is the defining feature of the structure: the buyer is acquiring economic exposure to approximately 500,000 shares of ARM for $29 million, versus the $105+ million it would cost to own that same notional outright in stock. The trade is a leveraged directional bet — more efficient than stock in capital terms, with a hard floor on maximum loss set at the premium paid.

This is the second consecutive print on the identical strike and expiry. On May 13, 2026, the same $170 August 21 call printed for $31 million (5,000 contracts at $61.90/contract). Today's print is $29 million — $57.20/contract on the same lot size. Together, these two prints represent $60 million in gross premium allocated to the same leveraged long ARM structure over 48 hours. That kind of back-to-back sizing, same strike, same expiry, is not coincidence and is not a retail flow pattern. It is deliberate institutional accumulation.

The catalyst context that motivated the May 13 print has not changed: ARM's FQ4 FY26 earnings on May 6 delivered a record $1.49B revenue quarter, data-center royalties more than doubled year-over-year, and the AGI CPU launch has already pulled in a $2B+ FY27-28 demand backlog. The FQ1 FY27 earnings report — expected around July 29, 2026 — sits squarely inside the August 21 expiry, giving this position a second primary catalyst window within a single contract.

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Company Overview

Arm Holdings plc (NASDAQ: ARM) is the dominant licensor of CPU instruction-set architecture (ISA) and processor core IP, embedded in roughly 99% of the world's smartphone application processors. Over the past two years, the company has undergone a structural business-model expansion: the Neoverse data-center CPU family now accounts for a rapidly growing share of hyperscaler compute capacity, and the March 24, 2026 AGI CPU launch — ARM's first-ever in-house production silicon — marks a deliberate pivot from pure IP licensor to full-stack compute platform provider.

Key figures (as of May 2026):

ARM's asset-light licensing and royalty model generates gross margins well above 95%, and the company has a $2B+ confirmed customer backlog for FY27-28 — roughly 40% of FY26 total revenue already committed by customers. Hyperscaler CPU compute share reached 50% in FY26, up from near-zero five years ago, marking a structural inflection rather than a cyclical uptick.

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The Trade

Vol/OI of 0.877 at trade time was the source of the original ambiguity — volume below existing OI can mean either fresh sizing into an existing footprint or a position being unwound. The May 18 OPRA snapshot removed that ambiguity entirely: open interest rose from 5,725 to 10,746 (+5,021) on the 5,000-contract print. A close would have driven OI down by ≈5,000; instead it nearly doubled. The May 13 print (Vol/OI 6.44x at the time) built the base position from a ≈776 baseline to 5,765; the May 15 print added a comparable lot on top. The cumulative picture is now confirmed by hard open-interest data, not inferred from the tape: an institution opened 5,000 contracts on May 13 and returned to open another ≈5,000 on May 15. The BTO Order_Type — flagged by the classifier and now verified by the +5,021 OI delta — is an opening purchase, not a closing or management transaction.

Cumulative two-day allocation summary:

The $4.70/contract decline from $61.90 to $57.20 reflects the spot price moving from ≈$218 (May 13) to $211.61 (May 15) — the stock pulled back roughly 3% between prints, and the buyer used that dip to add at a lower effective cost per contract. That is a disciplined institutional accumulation pattern: scale in on weakness, same structure, same expiry.

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Risk / Reward Profile

Breakeven Analysis

Breakeven = $170 strike + $57.20 premium paid = $227.20

The stock needs to reach $227.20 by August 21, 2026 for this position to break even at expiry — approximately +7.4% from the $211.61 spot at time of trade. That is a modest hurdle relative to the catalyst stack ahead: ARM moved +10% on the FQ4 print alone, and the next primary catalyst (FQ1 FY27 earnings, ≈July 29) sits inside this expiry.

Leverage Profile

The deep-ITM call captures nearly all of ARM's upside (delta ≈0.90) while capping maximum loss at the premium paid. The buyer controls $105M of notional stock exposure for $29M — a 3.6x capital efficiency ratio. This is the core logic of a stock-replacement structure: institutional-grade directional exposure with defined maximum downside.

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Greeks Analysis

The Greeks on this deep-ITM structure explain why it was chosen over at-the-money or out-of-the-money alternatives.

Key Greek insight: Low gamma + low-to-moderate theta + suppressed vega all reinforce the same message: this trade is designed to behave like a leveraged stock position, not a traditional speculative options play. The $15.59 of extrinsic value per contract is the insurance cost — the buyer is paying roughly 15 cents on the dollar of contract notional for the right to participate in ARM's upside while permanently capping their downside at the $29M premium paid. Compared to the $105M at risk in an equivalent stock position, that insurance is cheap.

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Scenario Analysis

At Expiry (August 21, 2026)

Mid-Cycle Mark (July 1, 2026 — Pre-Earnings, ≈51 DTE)

At 51 days to expiry with the pre-earnings implied volatility premium building into the late-July FQ1 FY27 report, estimated position values at various spot levels:

The mid-cycle window is important because the FQ1 FY27 earnings date (≈July 29) means the position will carry elevated implied volatility into that event. That pre-earnings IV expansion partially offsets theta decay in the weeks before the print — a structural advantage of having the primary catalyst inside the expiry.

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YTD Price Chart

ARM's +95.2% YTD performance through May 2026 reflects a series of step-changes rather than a smooth uptrend. The stock bottomed near $100 in late 2025 amid broader AI capex uncertainty, then re-rated sharply on the March 24, 2026 AGI CPU announcement (+16% single-day) and again on the FQ4 FY26 earnings report (May 6, +10%). The current $211.61 spot represents a pullback from the post-earnings high of $226.10 on May 14 — the stock gave back roughly 6.5% in one session on May 15, creating the dip the whale used to add the second tranche.

The $210–215 zone is a meaningful technical level: it represents the pre-May 7 gap area from the initial post-earnings surge, and dealer gamma exposure creates mechanical support near $210 from put hedging flows. The stock is approximately 12% below its 52-week high of $239.50 — within one strong catalyst's reach.

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Gamma Support & Resistance

Gamma exposure levels as of May 15, 2026 (spot: $211.61) show the options market maker hedging landscape that the position must navigate:

The whale's breakeven of $227.20 sits in the $225–$230 resistance band. Breaking through that zone on a strong catalyst — the most likely trigger being a FQ1 FY27 earnings beat — would force dealer delta re-hedging to accelerate the move higher rather than dampen it. The $200 support level provides meaningful downside cushion from a gamma perspective: dealer hedging flows at $200 tend to create mechanical buying, which aligns with the position's intrinsic value floor logic.

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Implied Move

The implied move chart reflects options market consensus on expected price magnitude across upcoming ARM expirations. Key observations for the August 21 expiry:

• The options market prices meaningful uncertainty into the late-July FQ1 FY27 earnings window, with that event likely driving the widest single-event implied range in the current term structure.
• The August 21 expiry captures both any continuation of the post-FQ4 directional drift and the full FQ1 FY27 earnings binary event — giving this position two distinct catalyst opportunities within a single contract.
• Deep-ITM calls at ≈0.90 delta have substantially reduced vega sensitivity relative to ATM structures. The primary P&L driver for this position is delta (directional price movement), not volatility expansion. This means the position is relatively resilient to IV crush — the ≈$41.61 of intrinsic value per contract does not disappear in a volatility compression event, only the $15.59 of extrinsic premium is at risk from IV changes.
• ARM's implied volatility term structure reflects the elevated uncertainty around the data-center royalty acceleration story — traders are paying for the optionality around FQ1 FY27 results and the AGI CPU revenue recognition timeline.

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Catalyst Stack

The August 21, 2026 expiry spans one of the densest confirmed catalyst windows in ARM's near-term history. The whale's timing — entering across both May 13 and May 15 — positions the combined 10,000-contract book to capture every event in this sequence.

1. FQ4 FY26 Earnings — Record Quarter Already Confirmed (May 6, 2026)

The launchpad for both trades. ARM delivered $1.49B in revenue (+20% YoY), beating the $1.47B consensus. Licensing revenue surged to $819M (+29% YoY) as hyperscalers committed to multi-year Compute Subsystem deployments. Data-center royalties more than doubled year-over-year — the clearest evidence yet of a structural shift from mobile to cloud compute. Full-year FY26 revenue of $4.92B marks three consecutive 20%+ growth years since IPO. Management outlined a long-term roadmap to $15B chip revenue and $9 EPS by 2031 — a target that, if achieved, would justify substantially higher multiples.

2. Computex 2026 — June 1–3, Taipei

ARM CEO Rene Haas is delivering a keynote on "powering the rise of agentic AI" at Computex June 1–3, covering hyperscale infrastructure, AI PCs, and the intelligent edge. NVIDIA's June 1 keynote may co-announce the Arm-based N1 laptop SoC — a potential new royalty-bearing product category announcement. Any incremental AGI CPU customer disclosure or hyperscaler partnership announcement at Computex would be a direct near-term catalyst for the stock.

3. Apple WWDC — June 8–12, 2026

Apple's Worldwide Developers Conference is expected to include M5, M5 Pro, M5 Max, and M5 Ultra silicon unveiling across Mac Mini, Mac Studio, and MacBook Pro. Every Apple silicon launch drives Arm v9 royalty volume, and Apple remains the single largest royalty contributor to ARM's revenue base. v9 chips command approximately 2x the per-unit royalty rate of legacy v8 — so WWDC is a royalty mix-shift catalyst, not just a product news event.

4. Vera Rubin Platform Ramp — H2 2026

NVIDIA's Vera Rubin AI computing platform enters full production and OEM availability in the second half of 2026. Each Vera CPU contains 88 Arm v9.2-A cores, generating per-unit Arm royalties on every server shipped. With hyperscaler AI infrastructure capital spending running at $200B+ annual rates across the top five cloud providers, even a modest per-unit royalty on Vera-based AI servers at scale represents a meaningful ongoing royalty expansion vector. The Vera Rubin ramp is expected to be visible in FQ2-FQ3 FY27 earnings (October 2026 / January 2027) — outside this expiry, but the forward guidance disclosure at FQ1 FY27 will likely include early Vera data.

5. AGI CPU Full Production — H2 2026

ARM's first-ever in-house production silicon — a 136-core Neoverse V3 CPU on TSMC 3nm — enters full production availability in H2 2026. Launch customers include Meta (samples already received), OpenAI, SAP, Cerebras, and Cloudflare. Jefferies noted that AGI CPU FY27-28 demand has doubled to $2B+ since the Arm Everywhere event in March — in less than 60 days, the confirmed backlog doubled. Revenue recognition from AGI CPU is likely to be visible starting in FQ2 FY27 (the October 2026 print), but the July FQ1 FY27 report will almost certainly include initial AGI CPU guidance and early revenue data.

6. FQ1 FY27 Earnings — Primary Catalyst, INSIDE August 21 Expiry

The most important event for this position is FQ1 FY27 earnings expected approximately July 29, 2026 — sitting squarely inside the August 21 expiry. This print will be:

• The first test of the newly issued $5.7B+ FY27 revenue guidance
• The first quarter capturing a full 90 days of AGI CPU and CSS V3 royalty contribution
• The first read on whether data-center royalties can sustain their trajectory beyond the FQ4 base effect
• A potential second AGI CPU hyperscaler customer announcement
• The event most likely to push ARM to new all-time highs above $239.50 — or to create a sharp correction if guidance disappoints

Consensus FY27 EPS of $0.35 for Q1 is generally considered stale and likely to be revised upward given the $2B+ backlog signal. A beat-and-raise against that estimate is the primary path to the whale's $227.20 breakeven and beyond.

7. Analyst Price Target Trajectory

The post-FQ4 sell-side upgrade wave reflects a structural re-rating of the business:

KeyBanc's $300 target implies approximately +42% upside from current spot. At $300, this 5,000-contract position generates +$36.4M in profit on $29M deployed — a +125% return. None of these targets require anything beyond continuation of the existing trajectory.

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What to Watch — Back-to-Back Institutional Positioning

The most material signal in today's trade is not the $29M itself — it is the pattern it creates alongside May 13's $31M.

An institution that had already committed $31M to ARM's August 21 $170 call two days ago chose to add an equivalent-sized position at a lower price. That behavior has specific interpretive weight:

It signals conviction, not initial positioning. First-time positions of this size are unusual. A same-structure follow-on 48 hours later — deliberately adding on a 3% dip in the stock — indicates the institution had pre-established sizing targets that were not fully met by the May 13 print alone. They were not satisfied with 5,000 contracts. They wanted 10,000.

The average effective cost across both tranches is approximately $59.55/contract ($60M / 10,000 contracts). The combined breakeven across the full position is approximately $229.55 — about $18 above current spot. That is approximately an 8.5% move in the stock from today's price, achievable with one strong catalyst.

The timing around the dip is notable. ARM fell approximately 6.5% from May 14's $226.10 close to the $211.61 trade-time spot on May 15. Rather than standing aside while the stock declined, this institution used the dip to add. That is a buy-on-weakness pattern consistent with a conviction-driven accumulation thesis rather than reactive momentum chasing.

Open-interest confirmation across the two prints (May 18 OPRA data): OI on the Aug 21 $170 call went 776 (pre-May-13) → 5,765 (+4,989, May 13 open) → 5,725 (held flat through May 14) → 10,746 (+5,021, May 15 open). Both 5,000-contract prints are now hard-confirmed as opens by the open-interest record, not merely inferred from Vol/OI. The institution built and held a ≈10,000-contract long book across 48 hours — there is no OI evidence of any unwind. When the same institution adds to an existing position at a lower cost basis and the OI confirms both legs were retained, the effective risk/reward of the combined book is materially de-risked relative to a single-leg read.

Key monitoring events in order:

1. ARM price action through $220 gamma resistance — a sustained close above $220 would be the first technical confirmation
2. Computex June 1–3 — any AGI CPU customer disclosure or NVIDIA N1 Arm SoC co-announcement
3. Apple WWDC June 8–12 — M5 silicon volume signals for v9 royalty trajectory
4. FQ1 FY27 earnings ≈July 29 — the primary binary event; the position's fate is largely determined here

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Risk Factors

Options trading involves substantial risk. The following risks are specific to this position and are presented to give a complete picture of the trade, not just the bull case.

1. Valuation Premium — ARM Trades at 80x+ Forward Earnings

ARM's forward P/E remains well above 80x on revised consensus estimates — versus a semiconductor industry median of approximately 34x. The bull case for this valuation requires sustained 20%+ revenue growth, successful AGI CPU production ramp, and continued royalty rate expansion from v9 and CSS attach. Any combination of a guidance cut, earnings miss, or macro-driven multiple compression could trigger a 20–40% stock correction even if the company's fundamentals remain intact. A $170 stock price — the strike and maximum-loss level — is not an absurd outcome in a broad market risk-off scenario.

2. Post-Earnings Volatility — The May 7 Template

Despite beating consensus on every key metric, ARM fell 10.1% on May 7 (the day after FQ4 FY26 earnings) as the market digested a guidance range that was perceived as less aggressive than the stock's implied valuation required. The stock subsequently recovered, but the pattern illustrates how unforgiving the market is when expectations are extreme and the beat margin is narrow ($0.60 EPS vs. $0.58 consensus). FQ1 FY27 consensus of $0.35 EPS is the low point of the FY27 estimate sequence — any AGI CPU revenue slip, guidance softness, or China royalty deceleration at the July print could trigger a similar or sharper post-earnings response.

3. China RISC-V Displacement

China represents approximately 17–19% of ARM revenue, and Beijing's state-sponsored RISC-V push is a real long-cycle headwind. China growth in the FQ4 print slowed to +7.5% YoY — materially below the company's overall 20%+ pace. A further deceleration in China royalties, or an explicit guidance flag, would create a structural narrative overhang even if near-term financials remain strong.

4. SoftBank Overhang

SoftBank expanded its margin loan facility from $13.5B to $20B against ARM shares to fund a $22.5B OpenAI commitment, with $8.5B already drawn. SoftBank still owns more than 90% of ARM's float. Any decision to reduce that position — via secondary offering, block sales, or margin call — would put immediate selling pressure on a stock with relatively thin tradable float. This is a structural supply-side risk that is entirely independent of ARM's operating fundamentals.

5. AGI CPU Execution and Channel Conflict

ARM's first-ever production silicon program carries execution risk on multiple fronts: first-silicon hardware bugs, TSMC 3nm yield risk, supply chain management, and — critically — the potential for channel conflict with existing major licensees (Qualcomm, MediaTek, NVIDIA, Apple) who may resist a competitor-vendor relationship with their IP supplier. If any major licensee reduces CSS licensing commitments in response to the AGI CPU program, the royalty expansion thesis faces a structural challenge.

6. Position-Level Mark-to-Market Risk

The defined maximum loss is $29M — the full premium paid. But the practical risk before expiry is a drawdown scenario where ARM trades to $190–$200 (still well in the money but reduced intrinsic value), creating mark-to-market losses of $10–15M on this tranche before the July earnings catalyst. Combined with the May 13 tranche, a prolonged consolidation in the $195–210 range could put the combined $60M position down $20–25M on paper while the position holder awaits the FQ1 FY27 catalyst. Conviction management — not just position sizing — is a core risk factor here.

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Bottom Line

This is a leveraged directional bet on ARM's structural re-rating as a data-center and AI infrastructure company. The deep-ITM stock-replacement structure (delta ≈0.90) gives the buyer near-full participation in ARM's upside while capping maximum downside at the $29M premium — versus the $105M+ at risk in an equivalent stock position.

The two-day accumulation pattern across $60M total premium on the identical strike and expiry is the headline. This is not noise. A single institution decided that ARM's August 21 $170 call — at a spot price between $211 and $218 — was worth $60 million of commitment over 48 hours. The structure is consistent with an investor who has a price target well above the current $227.20 breakeven, wants defined maximum downside, and has a specific timeline view on the catalyst stack (Computex, WWDC, Vera Rubin ramp, FQ1 FY27 earnings) that terminates by August 21.

The combined position's effective breakeven of $229.55 implies approximately 8.5% upside from today's spot — achievable with a single strong catalyst and well within analyst price target ranges that now extend to $300. At $265 (TD Cowen's target), the combined 10,000-contract position generates approximately $36M in profit on $60M deployed. At $290 (Jefferies), the profit approaches $60M — a near-double on the full outlay.

The primary risk is not catastrophic stock loss. ARM going below $170 would require a significant macro deterioration combined with company-specific negative surprises — a real but not base-case scenario. The more practical risk is that the stock consolidates in the $200–225 range through a mediocre FQ1 FY27 print, the position expires with reduced intrinsic value, and the whale exits with a partial loss on a thesis that was structurally correct but poorly timed. That is the scenario that requires the most conviction to hold through.

Catalyst Score: 9/10. Dense, high-magnitude, confirmed catalyst sequence fully contained within the August 21 expiry. Risk is valuation/positioning rather than catalyst absence. The back-to-back institutional accumulation pattern over 48 hours is the most informative signal in today's tape.

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Options trading involves substantial risk and is not suitable for all investors. This analysis is for informational purposes only and does not constitute investment advice. Past performance of options strategies is not indicative of future results. Always consult a qualified financial advisor before trading derivatives. All Greek estimates are approximations based on standard Black-Scholes inputs at the time of the trade print; actual values will vary with market conditions.

Published: May 15, 2026 | Last updated: May 18, 2026 (open-interest resolution: May 15 print confirmed as a second OPEN, OI 5,725 → 10,746) | OptionLabs