SEC CIK 1556270

MAZELSKY JONATHAN JAY

Reported ownership across 2 companies, sourced from SEC Form 4 filings and updated daily.

Current Positions

CompanyShares OwnedAs Of
IDXXview stock →83,803.3022026-02-27
XRAYview stock →61,668.5342026-06-12

Position History — IDXX

Reported shares owned immediately after each Form 4 transaction, over time.

037,52475,048112,5712013-092017-122020-022021-022022-112024-082026-022026-02

Recent Filings — IDXX

DateActivitySharesPriceOwned After
2026-02-27Option exercise (derivative)197$0.000
2026-02-27Option exercise197$505.5383,803.302
2026-02-26Option exercise (derivative)23,326$0.000
2026-02-26Open-market sale2,589$663.0483,606.302
2026-02-26Open-market sale1,000$662.1686,195.302
2026-02-26Open-market sale1,200$661.1087,195.302
2026-02-26Open-market sale2,859$659.7588,395.302
2026-02-26Open-market sale3,660$658.9291,254.302
2026-02-26Open-market sale2,860$657.8494,914.302
2026-02-26Open-market sale1,343$656.8597,774.302
2026-02-26Open-market sale1,488$655.8599,117.302
2026-02-26Open-market sale1,111$654.63100,605.302
2026-02-26Open-market sale1,171$653.68101,716.302
2026-02-26Open-market sale1,669$652.49102,887.302
2026-02-26Open-market sale1,095$651.49104,556.302
2026-02-26Open-market sale1,281$650.67105,651.302
2026-02-26Option exercise23,326$141.60106,932.302
2026-02-14Option exercise (derivative)1,099$0.001,099
2026-02-14Option exercise (derivative)958$0.000
2026-02-14Tax withholding915$629.3583,606.302
2026-02-14Option exercise1,099$0.0084,521.302
2026-02-14Option exercise958$0.0083,422.302
2026-02-12Grant / award (derivative)13,407$0.0013,407
2025-08-15Gift1,051$0.0082,443.3
2025-08-08Option exercise (derivative)183—0
2025-08-08Option exercise183$598.4983,494.3
2025-08-06Option exercise (derivative)29,260—0
2025-08-06Open-market sale7,299$631.6193,199.3
2025-08-06Open-market sale880$636.8183,971.3
2025-08-06Open-market sale1,822$636.1584,851.3
2025-08-06Open-market sale3,526$635.1386,673.3
2025-08-06Open-market sale3,000$632.5690,199.3
2025-08-06Open-market sale660$639.3783,311.3
2025-08-06Open-market sale6,056$630.59100,498.3
2025-08-06Open-market sale3,397$629.82106,554.3
2025-08-06Open-market sale1,525$628.27109,951.3
2025-08-06Open-market sale1,095$626.90111,476.3
2025-08-06Option exercise29,260$67.85112,571.3
2025-02-14Option exercise (derivative)1,100$0.002,198
2025-02-14Option exercise (derivative)958$0.00958
2025-02-14Option exercise (derivative)689$0.000
2025-02-14Option exercise958$0.0083,404.59
2025-02-14Option exercise689$0.0082,446.59
2025-02-14Option exercise1,100$0.0084,504.59
2025-02-14Tax withholding1,222$444.5383,282.59
2025-02-13Grant / award (derivative)217$0.00217
2025-02-13Grant / award (derivative)25,932$0.0025,932
2024-08-05Option exercise (derivative)384—0
2024-08-05Option exercise384$0.0081,902.59
2024-08-05Tax withholding170$455.0881,732.59
2024-02-29Gift550$0.0081,496.59
2024-02-21Option exercise (derivative)483—0
2024-02-21Option exercise483$206.9482,046.59
2024-02-14Grant / award (derivative)806$0.00806
2024-02-14Grant / award (derivative)21,335$0.0021,335
2024-02-14Grant / award (derivative)178$0.00178
2024-02-14Option exercise (derivative)974$0.000
2024-02-14Option exercise (derivative)689$0.00689
2024-02-14Option exercise (derivative)958$0.001,916
2024-02-14Option exercise (derivative)1,100$0.003,298
2024-02-14Tax withholding1,839$560.5681,563.59
2024-02-14Option exercise435$0.0079,681.59
2024-02-14Option exercise974$0.0080,655.59
2024-02-14Option exercise689$0.0081,344.59
2024-02-14Option exercise958$0.0082,302.59
2024-02-14Option exercise1,100$0.0083,402.59
2024-02-07Option exercise (derivative)12,000—29,260
2024-02-07Open-market sale4,124$572.5381,766.59
2024-02-07Option exercise12,000$67.8591,246.59
2024-02-07Open-market sale5,356$571.7185,890.59
2024-02-07Open-market sale462$573.1981,304.59
2024-02-07Open-market sale1,353$574.7579,951.59
2024-02-07Open-market sale705$575.4879,246.59
2023-12-04Option exercise (derivative)13,424—0
2023-12-04Open-market sale1,324$513.5179,233.35
2023-12-04Open-market sale5,804$512.9580,557.35
2023-12-04Option exercise13,424$79.5486,361.35
2023-08-31Option exercise (derivative)13,424—13,424
2023-08-31Open-market sale13,424$512.0172,925.35
2023-08-31Option exercise13,424$79.5486,349.35
2023-08-05Option exercise (derivative)384—10,443
2023-08-05Option exercise384$0.0073,095.35
2023-08-05Tax withholding170$504.0872,925.35
2023-05-18Gift602$0.0072,699.35
2023-05-04Option exercise (derivative)560—0
2023-05-04Option exercise560$178.2673,301.35
2023-02-14Option exercise (derivative)974—12,475
2023-02-14Option exercise (derivative)435—13,449
2023-02-14Option exercise (derivative)504—13,884
2023-02-14Option exercise (derivative)959—10,827
2023-02-14Option exercise (derivative)689—11,786
2023-02-14Option exercise974$0.0072,735.64
2023-02-14Option exercise959$0.0074,383.64
2023-02-14Option exercise689$0.0073,424.64
2023-02-14Tax withholding1,657$503.6572,726.64
2023-02-14Option exercise435$0.0071,761.64
2023-02-14Option exercise504$0.0071,326.64
2023-02-08Grant / award (derivative)4,398—14,388
2023-02-08Grant / award (derivative)201—201
2023-02-08Grant / award (derivative)21,256—21,256
2023-02-08Grant / award (derivative)12,181—12,181
2022-11-14Option exercise (derivative)18,998—0
2022-11-14Open-market sale600$435.8870,804.64
2022-11-14Option exercise18,998$62.0081,304.64
2022-11-14Open-market sale972$433.3780,332.64
2022-11-14Open-market sale6,385$434.2673,947.64
2022-11-14Open-market sale2,543$435.0771,404.64
2022-11-07Option exercise (derivative)24,002—0
2022-11-07Option exercise24,002$52.0075,536.64
2022-11-07Open-market sale3,704$382.8168,432.64
2022-11-07Open-market sale500$380.8572,136.64
2022-11-07Open-market sale392$385.0162,306.64
2022-11-07Open-market sale2,716$383.2965,716.64
2022-11-07Open-market sale3,018$384.4762,698.64
2022-11-07Open-market sale900$378.6074,636.64
2022-11-07Open-market sale2,000$379.5072,636.64
2022-08-05Option exercise (derivative)385—9,990
2022-08-05Tax withholding179$407.7851,517.64
2022-08-05Option exercise385$0.0051,696.64
2022-05-20Option exercise (derivative)706—0
2022-05-20Option exercise706$141.6051,300.64
2022-03-04Gift500$0.0050,585.64
2022-02-14Grant / award (derivative)22,366—22,366
2022-02-14Grant / award (derivative)12,557—12,557
2022-02-14Grant / award (derivative)197—197
2022-02-14Grant / award (derivative)3,833—13,438
2022-02-14Option exercise (derivative)459—12,979
2022-02-14Option exercise (derivative)505—12,474
2022-02-14Option exercise (derivative)435—12,039
2022-02-14Option exercise (derivative)690—10,375
2022-02-14Option exercise (derivative)974—11,065
2022-02-14Option exercise459$0.0049,904.64
2022-02-14Option exercise690$0.0052,508.64
2022-02-14Option exercise974$0.0051,818.64
2022-02-14Tax withholding1,423$505.5351,085.64
2022-02-14Option exercise435$0.0050,844.64
2022-02-14Option exercise505$0.0050,409.64
2021-08-16Open-market sale182$674.4849,486.64
2021-08-16Open-market sale488$673.6949,668.64
2021-08-16Open-market sale533$672.3650,156.64
2021-08-16Open-market sale60$675.4449,426.64
2021-08-13Open-market sale983$676.3851,026.64
2021-08-13Open-market sale337$677.5850,689.64
2021-08-13Open-market sale3,417$675.3452,009.64
2021-08-05Option exercise (derivative)385—9,605
2021-08-05Option exercise385$0.0055,605.64
2021-08-05Tax withholding179$705.7655,426.64
2021-05-18Gift500$0.0055,209
2021-02-22Option exercise (derivative)1,475—0
2021-02-22Option exercise1,475$67.8555,697
2021-02-17Option exercise (derivative)25,000—24,002
2021-02-17Open-market sale500$538.8355,205
2021-02-17Option exercise25,000$52.0068,090
2021-02-17Open-market sale3,940$535.9464,150
2021-02-17Open-market sale5,376$536.7858,744
2021-02-17Open-market sale3,069$537.8455,705
2021-02-17Open-market sale100$543.1454,222
2021-02-17Open-market sale583$542.0854,322
2021-02-17Open-market sale300$540.8254,905
2021-02-14Option exercise (derivative)737—12,363
2021-02-14Grant / award (derivative)9,717—9,717
2021-02-14Grant / award (derivative)183—183
2021-02-14Grant / award (derivative)2,757—13,100
2021-02-14Grant / award (derivative)17,674—17,674
2021-02-14Option exercise (derivative)459—11,904
2021-02-14Option exercise (derivative)505—11,399
2021-02-14Option exercise (derivative)435—10,964
2021-02-14Option exercise (derivative)974—9,990
2021-02-14Option exercise737$0.0042,164
2021-02-14Tax withholding1,447$544.0843,090
2021-02-14Option exercise974$0.0044,537
2021-02-14Option exercise435$0.0043,563
2021-02-14Option exercise505$0.0043,128
2021-02-14Option exercise459$0.0042,623
2020-11-06Option exercise (derivative)1,256—0
2020-11-06Option exercise1,256$79.5441,413
2020-11-06Option exercise1,612$62.0040,157
2020-11-05Open-market sale355$463.4543,996
2020-11-05Gift600$0.0038,545
2020-11-05Open-market sale300$476.7339,145
2020-11-05Open-market sale147$473.9939,445
2020-11-05Open-market sale100$470.7939,592
2020-11-05Open-market sale246$469.8639,692
2020-11-05Open-market sale209$468.4739,938
2020-11-05Open-market sale300$476.7340,147
2020-11-05Open-market sale200$475.1840,447
2020-11-05Open-market sale247$473.9940,647
2020-11-05Open-market sale264$471.3440,894
2020-11-05Open-market sale714$470.3441,158
2020-11-05Open-market sale400$468.9241,872
2020-11-05Open-market sale310$467.3342,272
2020-11-05Open-market sale107$465.8142,582
2020-11-05Open-market sale1,307$465.0242,689
2020-08-05Option exercise (derivative)385—10,343
2020-08-05Option exercise385$0.0044,512
2020-08-05Tax withholding179$395.7144,333
2020-02-14Option exercise (derivative)435—10,728
2020-02-14Option exercise (derivative)505—11,163
2020-02-14Option exercise (derivative)459—11,668
2020-02-14Option exercise (derivative)737—12,127
2020-02-14Option exercise (derivative)471—12,864
2020-02-14Grant / award (derivative)3,896—13,335
2020-02-14Grant / award (derivative)40,078—40,078
2020-02-14Option exercise737$0.0043,893
2020-02-14Option exercise471$0.0043,156
2020-02-14Tax withholding1,210$288.7844,082
2020-02-14Option exercise435$0.0045,292
2020-02-14Option exercise459$0.0044,352
2020-02-14Option exercise505$0.0044,857
2020-02-05Option exercise (derivative)13,824—0
2020-02-05Open-market sale388$281.9742,685
2020-02-05Open-market sale100$280.1343,073
2020-02-05Open-market sale1,676$279.0143,173
2020-02-05Open-market sale3,354$277.8844,849
2020-02-05Open-market sale1,337$276.7148,203
2020-02-05Open-market sale1,145$275.7249,540
2020-02-05Option exercise13,824$45.8450,685
2020-01-15Option exercise (derivative)2,188—0
2020-01-15Option exercise2,188$45.8436,861
2019-11-04Option exercise (derivative)27,992—27,992
2019-08-08Option exercise (derivative)6,306—0
2019-08-08Option exercise (derivative)2,848—0
2019-08-08Option exercise (derivative)2,204—13,824
2019-08-08Option exercise2,848$47.5328,322
2019-08-08Option exercise6,306$47.5334,628
2019-08-08Option exercise2,204$45.8425,474
2019-08-05Option exercise (derivative)10,000—16,028
2019-08-05Grant / award (derivative)1,923—9,439
2019-08-05Grant / award (derivative)20,116—20,116
2019-08-05Open-market sale4,599$258.8023,270
2019-08-05Open-market sale5,401$258.0727,869
2019-08-05Option exercise10,000$45.8433,270
2019-02-14Option exercise (derivative)737—8,480
2019-02-14Option exercise (derivative)471—9,217
2019-02-14Option exercise (derivative)403—9,688
2019-02-14Option exercise (derivative)2,175—10,091
2019-02-14Option exercise (derivative)483—483
2019-02-14Option exercise (derivative)20,753—20,753
2019-02-14Option exercise (derivative)505—7,516
2019-02-14Option exercise (derivative)459—8,021
2019-02-14Option exercise505$0.0023,974
2019-02-14Tax withholding762$206.9423,212
2019-02-14Option exercise459$0.0023,469
2019-02-14Option exercise403$0.0021,802
2019-02-14Option exercise737$0.0023,010
2019-02-14Option exercise471$0.0022,273
2018-12-05Option exercise (derivative)961—7,916
2018-12-05Tax withholding446$196.8021,374
2018-12-05Option exercise961$0.0021,820
2018-02-14Grant / award (derivative)25,140—25,140
2018-02-14Option exercise (derivative)737—9,336
2018-02-14Option exercise (derivative)459—8,877
2018-02-14Grant / award (derivative)560—560
2018-02-14Grant / award (derivative)2,524—11,492
2018-02-14Option exercise (derivative)544—10,948
2018-02-14Option exercise (derivative)403—10,545
2018-02-14Option exercise (derivative)472—10,073
2018-02-14Tax withholding778$178.2620,760
2018-02-14Option exercise459$0.0021,538
2018-02-14Option exercise737$0.0021,079
2018-02-14Option exercise472$0.0020,342
2018-02-14Option exercise403$0.0019,870
2018-02-14Option exercise544$0.0019,467
2017-12-05Option exercise (derivative)961—8,968
2017-12-05Option exercise961$0.0019,355
2017-12-05Tax withholding471$159.7818,884
2017-09-01Option exercise (derivative)2,366—9,929
2017-09-01Option exercise2,366$0.0019,535
2017-09-01Tax withholding1,180$154.9818,355
2017-02-14Option exercise (derivative)472—13,032
2017-02-14Option exercise (derivative)403—13,504
2017-02-14Option exercise (derivative)545—13,907
2017-02-14Grant / award (derivative)2,295—14,452
2017-02-14Grant / award (derivative)706—706
2017-02-14Grant / award (derivative)23,326—23,326
2017-02-14Option exercise (derivative)737—12,295
2017-02-14Option exercise737$0.0017,802
2017-02-14Tax withholding719$141.6017,083
2017-02-14Option exercise545$0.0016,190
2017-02-14Option exercise472$0.0017,065
2017-02-14Option exercise403$0.0016,593
2016-12-05Option exercise (derivative)962—12,157
2016-12-05Tax withholding311$114.1015,593
2016-12-05Option exercise962$0.0015,904
2016-11-18Option exercise (derivative)2,204—6,306
2016-11-18Option exercise2,204$47.5314,942
2016-09-01Option exercise (derivative)2,366—13,119
2016-09-01Tax withholding765$113.1612,675
2016-09-01Option exercise2,366$0.0013,440
2016-02-14Grant / award (derivative)1,475—1,475
2016-02-14Option exercise (derivative)545—16,360
2016-02-14Option exercise (derivative)403—15,957
2016-02-14Option exercise (derivative)472—15,485
2016-02-14Grant / award (derivative)41,260—41,260
2016-02-14Grant / award (derivative)3,685—16,905
2016-02-14Option exercise545$0.0010,544
2016-02-14Option exercise403$0.0010,948
2016-02-14Option exercise472$0.0011,419
2016-02-14Tax withholding508$67.8510,911
2015-12-05Option exercise (derivative)962—13,220
2015-12-05Tax withholding311$70.409,915
2015-12-05Option exercise962$0.0010,226
2015-09-01Option exercise (derivative)2,366$0.0014,182
2015-09-01Tax withholding765$70.549,185
2015-09-01Option exercise2,366$0.009,950
2015-02-14Grant / award (derivative)1,179$0.008,749
2015-02-14Option exercise (derivative)273$0.008,274
2015-02-14Grant / award (derivative)13,424$0.0013,424
2015-02-14Option exercise (derivative)202$0.008,547
2015-02-14Grant / award (derivative)628$0.00628
2015-02-14Option exercise273$0.003,885
2015-02-14Option exercise202$0.003,612
2015-02-14Tax withholding176$159.083,709
2014-12-23Option exercise (derivative)1,000$0.004,255
2014-12-23Option exercise1,000$95.063,366
2014-12-05Option exercise (derivative)481$0.007,570
2014-12-05Option exercise481$0.002,521
2014-12-05Tax withholding155$148.622,366
2014-09-01Option exercise (derivative)1,184$0.008,051
2014-09-01Option exercise1,184$0.002,378
2014-09-01Tax withholding383$123.971,995
2014-02-14Option exercise (derivative)273$0.009,235
2014-02-14Grant / award (derivative)1,008$0.009,508
2014-02-14Grant / award (derivative)9,499$0.009,499
2014-02-14Tax withholding102$124.001,086
2014-02-14Option exercise273$0.001,188
2013-12-05Grant / award (derivative)2,404$0.008,500
2013-12-05Grant / award (derivative)24,501$0.0024,501
2013-09-01Option exercise (derivative)1,184$0.006,096
2013-09-01Tax withholding383$93.82801
2013-09-01Option exercise1,184$0.001,184
2013-02-14Grant / award (derivative)1,094$0.001,094
2013-02-14Grant / award (derivative)1,363$0.007,280
2013-02-14Grant / award (derivative)13,014$0.0013,014
2012-09-01Grant / award (derivative)1,424$0.001,424
2012-09-01Grant / award (derivative)5,917$0.005,917
2012-09-01Grant / award (derivative)5,255$0.005,255

Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.