Celestica CLS Insider Ownership

Updated Nov 4, 2026

Over the past year, CLS insiders sold $254.06 million of stock (748.13K shares) on the open market and bought none.

• Celestica's open-market sales in the past 12 months came from 8 insiders; no insider bought.
• Robert Mionis (Chief Executive Officer) led open-market sales of Celestica stock over the past 12 months with $130.69 million (345.95K shares), most recently on September 23, 2026.
• In transactions other than open-market trades, Celestica insiders acquired 1.62Mn shares through option exercises and conversions, gave up 788.24K shares to cover taxes or exercise prices and gave away 15.6K shares as gifts over the past 12 months.
• Business Quant data puts insider holdings in CLS at 676.19K shares across insiders' latest Form 4 filings, down 26.43% from 919.12K shares at the end of Q2 2026 and up 11.09% from 608.68K shares at the end of Q3 2025.
• Celestica insiders report no indirect holdings: all 676.19K shares are held directly.
• Business Quant counts 12 insiders with holdings in Celestica stock, among the officers, directors and 10% owners who have filed a Form 4 in the past two years.
• Celestica's top three insider holders by shares held are Robert Mionis (Chief Executive Officer, 453.7K shares), Todd C. Cooper (President, 73.25K shares) and Mandeep Chawla (Chief Financial Officer, 65.44K shares).
• Robert Mionis alone accounts for 67.10% of the shares held by Celestica insiders.
• Institutions held 68.99% of Celestica's outstanding shares in their Q2 2026 13F filings, insiders about 0.54% based on their latest Form 4 filings, and other investors, including the public, the remaining 30.47%.
• Over the trailing 12 months, 18 insiders reported transactions in CLS stock across 81 Form 4 filings.
• These insider figures for Celestica are based on Form 4 filings through October 1, 2026.