Jonathan Mazelsky sold $17.7M of Idexx Laboratories stock

By AlphaYouPublished Nov 6, 2026Form 4

Stocks in this disclosure

Reported activity

MAZELSKY JONATHAN JAY

Reporting filer

Jonathan Jay Mazelsky reported selling 25,140 shares of Idexx Laboratories Inc /de for about $17.7M ($703.19 a share on average). Form 4 filed Nov 5, 2026 lists 15 entries.

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Disclosed: Nov 5, 2026

Reported details

15 entries

All validated entries in this disclosure
Security	Owner	Date	Code	Action	Quantity	Price	Following holdings	Reporting delay	Filed terms and references
Common Stock	MAZELSKY JONATHAN JAY	2026-11-04	M	Exercise or conversion	25140	178.26	108,943.302	1 day	Filed terms security Title: Common Stock transaction Date: 2026-11-04 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Shares: 25140 transaction Price Per Share: 178.26 transaction Acquired Disposed Code: A shares Owned Following Transaction: 108943.302 direct Or Indirect Ownership: D
Common Stock	MAZELSKY JONATHAN JAY	2026-11-04	S	Sale	1945	698.2625	106,998.302	1 day	Filed terms security Title: Common Stock transaction Date: 2026-11-04 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 transaction Shares: 1945 transaction Price Per Share: 698.2625 id: F1 transaction Acquired Disposed Code: D shares Owned Following Transaction: 106998.302 direct Or Indirect Ownership: D
Common Stock	MAZELSKY JONATHAN JAY	2026-11-04	S	Sale	4075	699.3278	102,923.302	1 day	Filed terms security Title: Common Stock transaction Date: 2026-11-04 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 transaction Shares: 4075 transaction Price Per Share: 699.3278 id: F2 transaction Acquired Disposed Code: D shares Owned Following Transaction: 102923.302 direct Or Indirect Ownership: D
Common Stock	MAZELSKY JONATHAN JAY	2026-11-04	S	Sale	1667	700.325	101,256.302	1 day	Filed terms security Title: Common Stock transaction Date: 2026-11-04 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 transaction Shares: 1667 transaction Price Per Share: 700.325 id: F3 transaction Acquired Disposed Code: D shares Owned Following Transaction: 101256.302 direct Or Indirect Ownership: D
Common Stock	MAZELSKY JONATHAN JAY	2026-11-04	S	Sale	4540	701.3564	96,716.302	1 day	Filed terms security Title: Common Stock transaction Date: 2026-11-04 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 transaction Shares: 4540 transaction Price Per Share: 701.3564 id: F4 transaction Acquired Disposed Code: D shares Owned Following Transaction: 96716.302 direct Or Indirect Ownership: D
Common Stock	MAZELSKY JONATHAN JAY	2026-11-04	S	Sale	2136	702.2107	94,580.302	1 day	Filed terms security Title: Common Stock transaction Date: 2026-11-04 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 transaction Shares: 2136 transaction Price Per Share: 702.2107 id: F5 transaction Acquired Disposed Code: D shares Owned Following Transaction: 94580.302 direct Or Indirect Ownership: D
Common Stock	MAZELSKY JONATHAN JAY	2026-11-04	S	Sale	3950	703.449	90,630.302	1 day	Filed terms security Title: Common Stock transaction Date: 2026-11-04 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 transaction Shares: 3950 transaction Price Per Share: 703.449 id: F6 transaction Acquired Disposed Code: D shares Owned Following Transaction: 90630.302 direct Or Indirect Ownership: D
Common Stock	MAZELSKY JONATHAN JAY	2026-11-04	S	Sale	240	705.59	90,390.302	1 day	Filed terms security Title: Common Stock transaction Date: 2026-11-04 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 transaction Shares: 240 transaction Price Per Share: 705.59 transaction Acquired Disposed Code: D shares Owned Following Transaction: 90390.302 direct Or Indirect Ownership: D
Common Stock	MAZELSKY JONATHAN JAY	2026-11-04	S	Sale	840	707	89,550.302	1 day	Filed terms security Title: Common Stock transaction Date: 2026-11-04 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 transaction Shares: 840 transaction Price Per Share: 707 id: F7 transaction Acquired Disposed Code: D shares Owned Following Transaction: 89550.302 direct Or Indirect Ownership: D
Common Stock	MAZELSKY JONATHAN JAY	2026-11-04	S	Sale	1840	707.8445	87,710.302	1 day	Filed terms security Title: Common Stock transaction Date: 2026-11-04 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 transaction Shares: 1840 transaction Price Per Share: 707.8445 id: F8 transaction Acquired Disposed Code: D shares Owned Following Transaction: 87710.302 direct Or Indirect Ownership: D
Common Stock	MAZELSKY JONATHAN JAY	2026-11-04	S	Sale	1300	709.0019	86,410.302	1 day	Filed terms security Title: Common Stock transaction Date: 2026-11-04 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 transaction Shares: 1300 transaction Price Per Share: 709.0019 id: F9 transaction Acquired Disposed Code: D shares Owned Following Transaction: 86410.302 direct Or Indirect Ownership: D
Common Stock	MAZELSKY JONATHAN JAY	2026-11-04	S	Sale	1501	710.1207	84,909.302	1 day	Filed terms security Title: Common Stock transaction Date: 2026-11-04 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 transaction Shares: 1501 transaction Price Per Share: 710.1207 id: F10 transaction Acquired Disposed Code: D shares Owned Following Transaction: 84909.302 direct Or Indirect Ownership: D
Common Stock	MAZELSKY JONATHAN JAY	2026-11-04	S	Sale	775	711.3085	84,134.302	1 day	Filed terms security Title: Common Stock transaction Date: 2026-11-04 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 transaction Shares: 775 transaction Price Per Share: 711.3085 id: F11 transaction Acquired Disposed Code: D shares Owned Following Transaction: 84134.302 direct Or Indirect Ownership: D
Common Stock	MAZELSKY JONATHAN JAY	2026-11-04	S	Sale	331	711.9475	83,803.302	1 day	Filed terms security Title: Common Stock transaction Date: 2026-11-04 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 transaction Shares: 331 transaction Price Per Share: 711.9475 id: F12 transaction Acquired Disposed Code: D shares Owned Following Transaction: 83803.302 direct Or Indirect Ownership: D
Non-Qualified Stock Option (right-to-buy) (derivative)	MAZELSKY JONATHAN JAY	2026-11-04	M	Exercise or conversion	25140	Not stated (see footnotes)	0	1 day	Filed terms security Title: Non-Qualified Stock Option (right-to-buy) conversion Or Exercise Price: 178.26 transaction Date: 2026-11-04 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Shares: 25140 id: F14 transaction Acquired Disposed Code: D id: F13 expiration Date: 2028-02-13 underlying Security Title: Common Stock underlying Security Shares: 25140 shares Owned Following Transaction: 0 direct Or Indirect Ownership: D

Common Stock

Owner: MAZELSKY JONATHAN JAY
Date: 2026-11-04
Code: M
Action: Exercise or conversion
Quantity: 25140
Price: 178.26
Following holdings: 108,943.302
Reporting delay: 1 day
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Shares: 25140
transaction Price Per Share: 178.26
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 108943.302
direct Or Indirect Ownership: D

Common Stock

Owner: MAZELSKY JONATHAN JAY
Date: 2026-11-04
Code: S
Action: Sale
Quantity: 1945
Price: 698.2625
Following holdings: 106,998.302
Reporting delay: 1 day
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 1945
transaction Price Per Share: 698.2625
id: F1
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 106998.302
direct Or Indirect Ownership: D

Common Stock

Owner: MAZELSKY JONATHAN JAY
Date: 2026-11-04
Code: S
Action: Sale
Quantity: 4075
Price: 699.3278
Following holdings: 102,923.302
Reporting delay: 1 day
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 4075
transaction Price Per Share: 699.3278
id: F2
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 102923.302
direct Or Indirect Ownership: D

Common Stock

Owner: MAZELSKY JONATHAN JAY
Date: 2026-11-04
Code: S
Action: Sale
Quantity: 1667
Price: 700.325
Following holdings: 101,256.302
Reporting delay: 1 day
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 1667
transaction Price Per Share: 700.325
id: F3
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 101256.302
direct Or Indirect Ownership: D

Common Stock

Owner: MAZELSKY JONATHAN JAY
Date: 2026-11-04
Code: S
Action: Sale
Quantity: 4540
Price: 701.3564
Following holdings: 96,716.302
Reporting delay: 1 day
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 4540
transaction Price Per Share: 701.3564
id: F4
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 96716.302
direct Or Indirect Ownership: D

Common Stock

Owner: MAZELSKY JONATHAN JAY
Date: 2026-11-04
Code: S
Action: Sale
Quantity: 2136
Price: 702.2107
Following holdings: 94,580.302
Reporting delay: 1 day
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 2136
transaction Price Per Share: 702.2107
id: F5
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 94580.302
direct Or Indirect Ownership: D

Common Stock

Owner: MAZELSKY JONATHAN JAY
Date: 2026-11-04
Code: S
Action: Sale
Quantity: 3950
Price: 703.449
Following holdings: 90,630.302
Reporting delay: 1 day
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 3950
transaction Price Per Share: 703.449
id: F6
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 90630.302
direct Or Indirect Ownership: D

Common Stock

Owner: MAZELSKY JONATHAN JAY
Date: 2026-11-04
Code: S
Action: Sale
Quantity: 240
Price: 705.59
Following holdings: 90,390.302
Reporting delay: 1 day
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 240
transaction Price Per Share: 705.59
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 90390.302
direct Or Indirect Ownership: D

Common Stock

Owner: MAZELSKY JONATHAN JAY
Date: 2026-11-04
Code: S
Action: Sale
Quantity: 840
Price: 707
Following holdings: 89,550.302
Reporting delay: 1 day
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 840
transaction Price Per Share: 707
id: F7
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 89550.302
direct Or Indirect Ownership: D

Common Stock

Owner: MAZELSKY JONATHAN JAY
Date: 2026-11-04
Code: S
Action: Sale
Quantity: 1840
Price: 707.8445
Following holdings: 87,710.302
Reporting delay: 1 day
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 1840
transaction Price Per Share: 707.8445
id: F8
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 87710.302
direct Or Indirect Ownership: D

Common Stock

Owner: MAZELSKY JONATHAN JAY
Date: 2026-11-04
Code: S
Action: Sale
Quantity: 1300
Price: 709.0019
Following holdings: 86,410.302
Reporting delay: 1 day
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 1300
transaction Price Per Share: 709.0019
id: F9
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 86410.302
direct Or Indirect Ownership: D

Common Stock

Owner: MAZELSKY JONATHAN JAY
Date: 2026-11-04
Code: S
Action: Sale
Quantity: 1501
Price: 710.1207
Following holdings: 84,909.302
Reporting delay: 1 day
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 1501
transaction Price Per Share: 710.1207
id: F10
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 84909.302
direct Or Indirect Ownership: D

Common Stock

Owner: MAZELSKY JONATHAN JAY
Date: 2026-11-04
Code: S
Action: Sale
Quantity: 775
Price: 711.3085
Following holdings: 84,134.302
Reporting delay: 1 day
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 775
transaction Price Per Share: 711.3085
id: F11
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 84134.302
direct Or Indirect Ownership: D

Common Stock

Owner: MAZELSKY JONATHAN JAY
Date: 2026-11-04
Code: S
Action: Sale
Quantity: 331
Price: 711.9475
Following holdings: 83,803.302
Reporting delay: 1 day
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 331
transaction Price Per Share: 711.9475
id: F12
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 83803.302
direct Or Indirect Ownership: D

Non-Qualified Stock Option (right-to-buy) (derivative)

Owner: MAZELSKY JONATHAN JAY
Date: 2026-11-04
Code: M
Action: Exercise or conversion
Quantity: 25140
Price: Not stated (see footnotes)
Following holdings: 0
Reporting delay: 1 day
Filed terms and references: Filed terms
security Title: Non-Qualified Stock Option (right-to-buy)
conversion Or Exercise Price: 178.26
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Shares: 25140
id: F14
transaction Acquired Disposed Code: D
id: F13
expiration Date: 2028-02-13
underlying Security Title: Common Stock
underlying Security Shares: 25140
shares Owned Following Transaction: 0
direct Or Indirect Ownership: D

Purchases, sales, grants and option exercises are different transactions. The reported code identifies the action; it does not establish a motive.

Filing context

Quantities and prices are shown in the units filed. No trade value is inferred from their product.
MAZELSKY JONATHAN JAY: Executive Chair of the Board, Director.
F1: Represents the weighted average price of the shares sold ranging from a low of $697.80 to a high of $698.77 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.
F2: Represents the weighted average price of the shares sold ranging from a low of $698.92 to a high of $699.89 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.
F3: Represents the weighted average price of the shares sold ranging from a low of $700.00 to a high of $700.80 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.
F4: Represents the weighted average price of the shares sold ranging from a low of $701.005 to a high of $701.96 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.
F5: Represents the weighted average price of the shares sold ranging from a low of $702.00 to a high of $702.81 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.
F6: Represents the weighted average price of the shares sold ranging from a low of $703.04 to a high of $703.99 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.
F7: Represents the weighted average price of the shares sold ranging from a low of $706.60 to a high of $707.16 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.
F8: Represents the weighted average price of the shares sold ranging from a low of $707.645 to a high of $708.59 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.
F9: Represents the weighted average price of the shares sold ranging from a low of $708.65 to a high of $709.46 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.
F10: Represents the weighted average price of the shares sold ranging from a low of $709.815 to a high of $710.63 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.
F11: Represents the weighted average price of the shares sold ranging from a low of $710.82 to a high of $711.73 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.
F12: Represents the weighted average price of the shares sold ranging from a low of $711.845 to a high of $712.34 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.
F13: Grant of option to buy shares of Issuer common stock that vested in five annual installments beginning February 14, 2019.
F14: Not applicable.

Original sources

SEC ownership filing

Prepared automatically from public filing data. Report a correction.

Security

Owner

Date

Code

Action

Quantity

Price

Following holdings

Reporting delay

Filed terms and references

Common Stock

MAZELSKY JONATHAN JAY

2026-11-04

Exercise or conversion

25140

178.26

108,943.302

1 day

Filed terms

security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Shares: 25140
transaction Price Per Share: 178.26
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 108943.302
direct Or Indirect Ownership: D

Common Stock

MAZELSKY JONATHAN JAY

2026-11-04

Sale

1945

698.2625

106,998.302

1 day

Filed terms

security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 1945
transaction Price Per Share: 698.2625
id: F1
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 106998.302
direct Or Indirect Ownership: D

Common Stock

MAZELSKY JONATHAN JAY

2026-11-04

Sale

4075

699.3278

102,923.302

1 day

Filed terms

security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 4075
transaction Price Per Share: 699.3278
id: F2
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 102923.302
direct Or Indirect Ownership: D

Common Stock

MAZELSKY JONATHAN JAY

2026-11-04

Sale

1667

700.325

101,256.302

1 day

Filed terms

security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 1667
transaction Price Per Share: 700.325
id: F3
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 101256.302
direct Or Indirect Ownership: D

Common Stock

MAZELSKY JONATHAN JAY

2026-11-04

Sale

4540

701.3564

96,716.302

1 day

Filed terms

security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 4540
transaction Price Per Share: 701.3564
id: F4
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 96716.302
direct Or Indirect Ownership: D

Common Stock

MAZELSKY JONATHAN JAY

2026-11-04

Sale

2136

702.2107

94,580.302

1 day

Filed terms

security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 2136
transaction Price Per Share: 702.2107
id: F5
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 94580.302
direct Or Indirect Ownership: D

Common Stock

MAZELSKY JONATHAN JAY

2026-11-04

Sale

3950

703.449

90,630.302

1 day

Filed terms

security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 3950
transaction Price Per Share: 703.449
id: F6
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 90630.302
direct Or Indirect Ownership: D

Common Stock

MAZELSKY JONATHAN JAY

2026-11-04

Sale

240

705.59

90,390.302

1 day

Filed terms

security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 240
transaction Price Per Share: 705.59
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 90390.302
direct Or Indirect Ownership: D

Common Stock

MAZELSKY JONATHAN JAY

2026-11-04

Sale

840

707

89,550.302

1 day

Filed terms

security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 840
transaction Price Per Share: 707
id: F7
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 89550.302
direct Or Indirect Ownership: D

Common Stock

MAZELSKY JONATHAN JAY

2026-11-04

Sale

1840

707.8445

87,710.302

1 day

Filed terms

security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 1840
transaction Price Per Share: 707.8445
id: F8
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 87710.302
direct Or Indirect Ownership: D

Common Stock

MAZELSKY JONATHAN JAY

2026-11-04

Sale

1300

709.0019

86,410.302

1 day

Filed terms

security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 1300
transaction Price Per Share: 709.0019
id: F9
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 86410.302
direct Or Indirect Ownership: D

Common Stock

MAZELSKY JONATHAN JAY

2026-11-04

Sale

1501

710.1207

84,909.302

1 day

Filed terms

security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 1501
transaction Price Per Share: 710.1207
id: F10
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 84909.302
direct Or Indirect Ownership: D

Common Stock

MAZELSKY JONATHAN JAY

2026-11-04

Sale

775

711.3085

84,134.302

1 day

Filed terms

security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 775
transaction Price Per Share: 711.3085
id: F11
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 84134.302
direct Or Indirect Ownership: D

Common Stock

MAZELSKY JONATHAN JAY

2026-11-04

Sale

331

711.9475

83,803.302

1 day

Filed terms

security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
transaction Shares: 331
transaction Price Per Share: 711.9475
id: F12
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 83803.302
direct Or Indirect Ownership: D

Non-Qualified Stock Option (right-to-buy) (derivative)

MAZELSKY JONATHAN JAY

2026-11-04

Exercise or conversion

25140

Not stated (see footnotes)

1 day

Filed terms

security Title: Non-Qualified Stock Option (right-to-buy)
conversion Or Exercise Price: 178.26
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Shares: 25140
id: F14
transaction Acquired Disposed Code: D
id: F13
expiration Date: 2028-02-13
underlying Security Title: Common Stock
underlying Security Shares: 25140
shares Owned Following Transaction: 0
direct Or Indirect Ownership: D

Filing context

Quantities and prices are shown in the units filed. No trade value is inferred from their product.

MAZELSKY JONATHAN JAY: Executive Chair of the Board, Director.

F1: Represents the weighted average price of the shares sold ranging from a low of $697.80 to a high of $698.77 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.

F2: Represents the weighted average price of the shares sold ranging from a low of $698.92 to a high of $699.89 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.

F3: Represents the weighted average price of the shares sold ranging from a low of $700.00 to a high of $700.80 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.

F4: Represents the weighted average price of the shares sold ranging from a low of $701.005 to a high of $701.96 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.

F5: Represents the weighted average price of the shares sold ranging from a low of $702.00 to a high of $702.81 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.

F6: Represents the weighted average price of the shares sold ranging from a low of $703.04 to a high of $703.99 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.

F7: Represents the weighted average price of the shares sold ranging from a low of $706.60 to a high of $707.16 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.

F8: Represents the weighted average price of the shares sold ranging from a low of $707.645 to a high of $708.59 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.

F9: Represents the weighted average price of the shares sold ranging from a low of $708.65 to a high of $709.46 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.

F10: Represents the weighted average price of the shares sold ranging from a low of $709.815 to a high of $710.63 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.

F11: Represents the weighted average price of the shares sold ranging from a low of $710.82 to a high of $711.73 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.

F12: Represents the weighted average price of the shares sold ranging from a low of $711.845 to a high of $712.34 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.

F13: Grant of option to buy shares of Issuer common stock that vested in five annual installments beginning February 14, 2019.

F14: Not applicable.