Intuitive Surgical Officer Mark Brosius Files Form 144 for $254K Share Sale

Form 144 Analysis: Intuitive Surgical Inc (ISRG)

Transaction Overview

Mark Brosius, an Officer at Intuitive Surgical Inc, has filed a Form 144 notice indicating the proposed sale of 694 common shares through Morgan Stanley Smith Barney LLC. The estimated market value of the proposed transaction is $254,489.80, reflecting an approximate price of $366.70 per share.

Key Details

• Security: Common Stock
• Shares Proposed for Sale: 694
• Aggregate Market Value: $254,489.80
• Approximate Sale Date: September 8, 2026
• Shares Outstanding: 353,278,000
• Acquisition Origin: Performance Stock Units acquired from the issuer on February 28, 2026
• Trading Plan: Pre-arranged Rule 10b5-1 trading plan adopted on September 12, 2025

Historical Sales Context

Over the past three months, the reporting person has executed consistent, periodic sales under the 10b5-1 plan, including:

• Multiple tranches of 77 shares sold between August 17 and August 21, 2026
• Multiple tranches of 28 shares sold between July 27 and July 31, 2026
• Multiple tranches of 23–25 shares sold between June 9 and June 12, 2026

Market Significance

Rating: Low. The transaction represents an immaterial percentage of the company's 353M+ outstanding shares and is being conducted under a pre-established Rule 10b5-1 plan originating from PSU compensation vesting.