Magnetar Reports Expiration of 3.0M Share Collar on CoreWeave
CoreWeave, Inc.
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Filing Summary
Magnetar Reports Expiration of 3.0M Share Collar on CoreWeave
Company: CoreWeave, Inc. (CRWV)
Form: 4 | Filed: September 18, 2026
Significance: Medium
Insider: Magnetar Financial LLC Title: N/A | Relationship: 10% Owner
Transaction Details: • Type: Derivative Expiration (Collar) • Underlying Shares: 3,000,000 Class A Common Stock • Strike Prices: Put $75 / Call $180 • Price / Value: $0.00 / $0.00 (Expired Unexercised) • Post-Transaction Derivative Holdings: 0
Key Insight: A 3.0M share collar hedge established by Magnetar in August 2025 expired unexercised as CoreWeave traded between the $75 put and $180 call strikes. No common stock was transferred or diluted.
Market Context: Release of the collar hedge removes synthetic upside caps and downside protection across Magnetar-managed entities, covering 0.55% of shares outstanding.
Comprehensive Analysis
SEC Filing Analysis: CoreWeave, Inc. (CRWV)
Executive Summary
- Trading Significance: Medium
- Key Takeaway: Magnetar Financial LLC allowed European-style collar option positions covering 3,000,000 shares to expire unexercised and out-of-the-money at zero value.
- Market Impact: Neutral; no physical shares were bought or sold in the market, resulting in zero share dilution or direct selling pressure.
Company Information
| Field | Value |
|---|---|
| Company | CoreWeave, Inc. |
| Ticker Symbol | CRWV |
| CIK | 0001769628 |
| Industry | Services-Prepackaged Software [7372] |
Insider Information
| Field | Value |
|---|---|
| Name | Magnetar Financial LLC (and affiliates) |
| CIK | 0001352851 |
| Title/Position | N/A |
| Relationship | 10% Owner |
Transaction Details
| Field | Value |
|---|---|
| Form Type | 4 |
| Transaction Date | 2026-09-18 |
| Transaction Code | E (Expiration of derivative) |
| Security Type | Call option ($180 strike) & Put option ($75 strike) |
| Shares Involved | 3,000,000 (aggregate underlying) |
| Price Per Share | $0.00 |
| Total Value | $0.00 |
| Shares Owned After | 0 (options) |
| Ownership Type | Indirect |
Financial Impact Assessment
Transaction Materiality
| Metric | Value |
|---|---|
| Transaction Value | $0.00 |
| % of Market Cap | 0.00% |
| Shares Transacted (Underlying) | 3,000,000 |
| % of Shares Outstanding | 0.55% |
| Post-Transaction Ownership | Underlying common shares remain with funds |
| Materiality Assessment | Moderate to Significant (by share count) |
Impact Evaluation
- Market Cap Context: With a market capitalization of $45.77B across 545,570,000 shares outstanding, the 3,000,000 shares underlying the expired collar represent an economic exposure of roughly $225M–$540M at the respective strike boundaries.
- Ownership Concentration: Magnetar remains a major 10% beneficial owner across its funds; unhedged common equity exposure is now fully restored on this tranche.
- Dilution Impact: None. The options expired unexercised for zero consideration, creating no new share issuance or cancellation.
- Transaction Significance: Medium. While the dollar transaction value is $0, the expiration eliminates downside insurance ($75 put) and uncaps upside potential ($180 call) on 0.55% of the company's total equity base.
Market Impact Analysis
Stock Impact Prediction
- Direction: Neutral
- Reasoning: This event reflects the scheduled maturity of an institutional hedging collar established in August 2025. Because CRWV stock closed between $75 and $180, neither put nor call strikes were triggered, resulting in zero open-market trade activity.
Volume & Sentiment
- Expected Volume Impact: Negligible immediate volume impact since no shares were transacted.
- Sentiment Indicator: Neutral; signals the expiration of an existing hedge rather than an active directional accumulation or divestment.
Additional Context
Transaction Notes
- Timing: Settled upon final expiration on September 18, 2026.
- Special Circumstances: As disclosed in Footnote 1, both call ($180) and put ($75) options expired unexercised for no value pursuant to collar contracts entered into on August 18, 2025.
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Important Disclaimer
This content is drawn from public SEC filings and may contain errors. It is for informational purposes only and is not investment, legal, or tax advice.
Nothing here is a recommendation to buy, sell, or hold any security. Do your own due diligence.
