AQR Arbitrage LLC 4

What Happened
AQR Capital Management Holdings, LLC — reported as a 10% owner of IB Acquisition Corp. (IBAC) — sold a total of 335,000 shares on March 23, 2026 in multiple open-market/private-sale transactions at $10.80 per share, generating total proceeds of $3,618,000. These were outright sales (S), not purchases or option exercises, and thus represent disposition of held shares rather than an acquisition.

Key Details

• Transaction date: 2026-03-23; Price: $10.80 per share.
• Lots sold (examples): 138,005; 56,145; 40,144; 29,888; 26,410; 25,087; 10,377; 6,262; 1,623; 1,059 — aggregate 335,000 shares for $3,618,000.
• Shares owned after transaction: not specified in the provided filing details.
• Footnotes: AQR Capital Management, LLC is a wholly owned subsidiary of AQR Capital Management Holdings, LLC; AQR Arbitrage, LLC is deemed controlled by AQR Capital Management, LLC. These AQR entities act as investment manager/sub-advisor to several funds listed in the filing (see footnotes).
• Timeliness: Filing dated 2026-03-25 for a 2026-03-23 transaction—filed within the typical Form 4 reporting window (not indicated as late).

Context
This filing concerns a 10% institutional owner (AQR) and its affiliated management entities — institutional sales can reflect portfolio rebalancing or fund redemptions and are not the same as insider trades by company executives. The filing shows routine open-market dispositions; there is no indication of option exercises, awards, or gifts in this report.