Jonathan Jay Mazelsky

Insider Reports History

Identity Names, identifiers, and filing context for this profile. 1 identity field
Reporting-owner location
Westbrook, ME
SEC source record Original filing metadata and source links for verification. 1 source field
Latest reporting-owner signature
/s/ Lily J. Lu, Attorney-in-Fact for Jonathan Jay Mazelsky
Source: Latest parsed Forms 3/4/5 signature
Source evidence Original filing metadata and source links for verification. 1 source field
Transaction source note
Rows are grouped by transaction date from the original SEC filing. Open the aggregated insider activity page to review issuer-level activity across dates.

Reported holdings for Jonathan Jay Mazelsky

Form 4 holding Executive Chair of the Board, Director

IDEXX LABORATORIES INC /DE

Security class
Restricted Stock Unit
Shares / value
1,099
Estimated value
$977,077
Report date
14 Feb 2026
Price
$444.53
Ownership
Direct
Underlying class
Common Stock
Underlying amount
Form 4 holding Director

DENTSPLY SIRONA Inc.

Security class
Phantom Stock (Directors' Deferred Compensation) DDC
Shares / value
14,382
Estimated value
$163,517
Report date
31 Dec 2026
Price
$11.37
Ownership
Direct
Underlying class
Common Stock
Underlying amount
Form 4 holding Executive Chair of the Board, Director

IDEXX LABORATORIES INC /DE

Security class
Incentive Stock Option (right-to-buy)
Shares / value
0
Estimated value
Report date
27 Feb 2026
Price
Ownership
Direct
Underlying class
Common Stock
Underlying amount
Form 4 holding Executive Chair of the Board, Director

IDEXX LABORATORIES INC /DE

Security class
Non-Qualified Stock Option (right-to-buy)
Shares / value
0
Estimated value
Report date
04 Nov 2026
Price
Ownership
Direct
Underlying class
Common Stock
Underlying amount
Form 4 holding Executive Chair of the Board, Director

IDEXX LABORATORIES INC /DE

Security class
Premium Incentive Stock Option (right-to-buy)
Shares / value
0
Estimated value
Report date
08 Aug 2025
Price
Ownership
Direct
Underlying class
Common Stock
Underlying amount

Insider Reports Filed by Jonathan Jay Mazelsky

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