Jack L. Wyszomierski

Companies

• SiteOne Landscape Supply, Inc.Board member May 11, 2016 to now¹
• XOMA Royalty CorpBoard member Aug 26, 2010 to now²
• ExelixisBoard member May 3, 2006 to now³
• AthersysBoard member Jun 21, 2010 to Jan 11, 2023⁴

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• Exelixis EXEL284,384 shares⁵$17.8M at $62.59Jun 1, 2026
• SLSiteOne Landscape Supply, Inc. SITE19,120 shares⁶$1.8M at $95.00May 13, 2026
• XRXOMA Royalty Corp0 shares⁷Jul 14, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Jul 14, 2026Other 21,828 shares of XOMA Royalty Corp⁷
• Jun 1, 2026Sold 3,925 shares at $50.55 of Exelixis⁵
• May 27, 2026Granted 8,367 shares of Exelixis⁸
• May 21, 2026Granted 3,586 shares of XOMA Royalty Corp⁹
• May 13, 2026Granted 1,186 shares of SiteOne Landscape Supply, Inc.⁶
• Mar 24, 2026Exercised options 3,026 shares at $11.20 of XOMA Royalty Corp¹⁰
• Feb 18, 2026Sold 99,574 shares at $44.01 of Exelixis¹¹
• Feb 18, 2026Exercised options 20,634 shares at $19.77 of Exelixis¹¹
• Jun 3, 2025Sold 7,535 shares at $43.09 of Exelixis¹²
• May 29, 2025Granted 9,812 shares of Exelixis¹³
• May 21, 2025Granted 5,971 shares of XOMA Royalty Corp¹⁴
• May 14, 2025Granted 1,125 shares of SiteOne Landscape Supply, Inc.¹⁵
• Feb 28, 2025Sold 8,768 shares at $37.80 of Exelixis¹⁶
• Feb 28, 2025Exercised options 15,874 shares at $20.50 of Exelixis¹⁶
• Jun 4, 2024Sold 8,287 shares at $22.00 of Exelixis¹⁷
• May 31, 2024Granted 18,838 shares of Exelixis¹⁸
• May 15, 2024Granted 6,070 shares of XOMA Royalty Corp¹⁹
• May 13, 2024Sold 10,923 shares at $21.37 of Exelixis²⁰
• May 13, 2024Exercised options 11,686 shares at $19.57 of Exelixis²⁰
• May 7, 2024Granted 865 shares of SiteOne Landscape Supply, Inc.²¹
• Jun 1, 2023Granted 20,718 shares of Exelixis²²
• May 11, 2023Granted 878 shares of SiteOne Landscape Supply, Inc.²³
• Mar 10, 2023Sold 15,300 shares at $16.61 of Exelixis²⁴
• Mar 10, 2023Exercised options 40,000 shares at $6.30 of Exelixis²⁴
• Jan 9, 2023Granted 22,321 shares of CIK 1368148²⁵