AltMountain

Magnetar Opportunity 2025-4 LP

Evanston, IL · CIK 2105019 · Managed by Magnetar Financial LLC
Emerging

Magnetar Opportunity 2025-4 LP is a private equity fund based in Evanston, Illinois. According to its most recent Form D, filed Jan 14, 2026, it has sold $41,650,000 of interests to 35 investors since its first sale in Dec 2025. The minimum investment it accepts from an outside investor is $5,000,000. It relies on the Section 3(c)(7) exclusion, so investors generally must be qualified purchasers. The offering uses Rule 506(b), which does not permit general solicitation. Based on its first sale date and the amount raised, AltMountain classifies it as an emerging manager. Related persons named in the filing include Hayley Stein; Ross Laser; Magnetar Financial LLC.

Total raised
$41,650,000Cumulative sales reported on Form D
Investors
35
First sale
Dec 31, 2025
Minimum investment
$5,000,000
Who can invest
Qualified purchasersSection 3(c)(7): generally $5M+ in investments
Offering exemption
Rule 506(b)No general advertising
Key people and entities
Hayley Stein; Ross Laser; Magnetar Financial LLC
Latest Form D
Jan 14, 2026

From SEC filings, not verified. This page republishes the fund's Form D as filed. It is not an offer, solicitation or recommendation, and AltMountain has not reviewed the fund. “Raised” is cumulative sales, not current assets or performance. Returns are not part of SEC filings. Private funds are speculative, illiquid and generally limited to accredited investors or qualified purchasers. Full disclosures · Request a correction

Questions about Magnetar Opportunity 2025-4 LP

What is the minimum investment for Magnetar Opportunity 2025-4 LP?

According to its latest Form D, filed Jan 14, 2026, the minimum investment Magnetar Opportunity 2025-4 LP accepts from an outside investor is $5,000,000.

Who can invest in Magnetar Opportunity 2025-4 LP?

Magnetar Opportunity 2025-4 LP is generally open only to qualified purchasers (generally individuals with at least $5 million in investments), because it relies on Section 3(c)(7). It uses Rule 506(b), which does not allow general advertising.

How much has Magnetar Opportunity 2025-4 LP raised?

Magnetar Opportunity 2025-4 LP reports $41,650,000 sold from 35 investors on its Form D filed Jan 14, 2026. This is cumulative sales since the offering began, not current assets or performance.

Where is Magnetar Opportunity 2025-4 LP based?

Magnetar Opportunity 2025-4 LP is based in Evanston, Illinois and is managed by Magnetar Financial LLC.

When did Magnetar Opportunity 2025-4 LP launch?

Magnetar Opportunity 2025-4 LP reports its first sale in Dec 2025, which makes it an emerging manager by AltMountain's definition (first sale in 2021 or later and under $50 million raised).

Size compared with every private equity fund

Raised more than 66% of the 491 private equity funds based in Illinois, and more than 61% of all 9,142 that report sales.

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