MAZELSKY JONATHAN JAY

Director · Officer · XRAY, PODD, IDXX

As of 2026-09-16, MAZELSKY JONATHAN JAY has 70 Form 4 transactions on record across 3 companies — 34 in the trailing 12 months.

Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.

Reconstructed holdings

Direct: $336KIndirect: $0$336Kas of 2026-09-16
  • Direct $336K
  • Indirect $0
PODDdirect1,355 sh$191K
XRAYdirect14,382 sh$146K

Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.

Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.

Trades by company

IDXX · 49 trades
2026-02-27: Option exercise, 197 sh ($100K)2026-02-27: Option exercise, 197 sh ($0)2026-02-26: Option exercise, 23,326 sh ($3.3M)2026-02-26: Sale, 3,660 sh ($2.4M)2026-02-26: Sale, 2,859 sh ($1.9M)2026-02-26: Sale, 2,860 sh ($1.9M)2026-02-26: Sale, 2,589 sh ($1.7M)2026-02-26: Sale, 1,669 sh ($1.1M)2026-02-26: Sale, 1,488 sh ($976K)2026-02-26: Sale, 1,343 sh ($882K)2026-02-26: Sale, 1,281 sh ($834K)2026-02-26: Sale, 1,200 sh ($793K)2026-02-26: Sale, 1,171 sh ($765K)2026-02-26: Sale, 1,111 sh ($727K)2026-02-26: Sale, 1,095 sh ($713K)2026-02-26: Sale, 1,000 sh ($662K)2026-02-26: Option exercise, 23,326 sh ($0)2026-02-14: Withheld for tax, 915 sh ($576K)2026-02-14: Option exercise, 1,099 sh ($0)2026-02-14: Option exercise, 1,099 sh ($0)2026-02-14: Option exercise, 958 sh ($0)2026-02-14: Option exercise, 958 sh ($0)2026-02-12: Award / grant, 13,407 sh ($0)2025-08-15: Gift, 1,051 sh ($0)2025-08-08: Option exercise, 183 sh ($110K)2025-08-08: Option exercise, 183 sh2025-08-08: Option exercise, 183 sh2025-08-06: Sale, 7,299 sh ($4.6M)2025-08-06: Sale, 6,056 sh ($3.8M)2025-08-06: Sale, 3,526 sh ($2.2M)2025-08-06: Sale, 3,397 sh ($2.1M)2025-08-06: Option exercise, 29,260 sh ($2.0M)2025-08-06: Sale, 3,000 sh ($1.9M)2025-08-06: Sale, 1,822 sh ($1.2M)2025-08-06: Sale, 1,525 sh ($958K)2025-08-06: Sale, 1,095 sh ($686K)2025-08-06: Sale, 880 sh ($560K)2025-08-06: Sale, 660 sh ($422K)2025-08-06: Option exercise, 29,260 sh2025-08-06: Option exercise, 29,260 sh2025-02-14: Withheld for tax, 1,222 sh ($543K)2025-02-14: Option exercise, 689 sh ($0)2025-02-14: Option exercise, 1,100 sh ($0)2025-02-14: Option exercise, 958 sh ($0)2025-02-14: Option exercise, 1,100 sh ($0)2025-02-14: Option exercise, 958 sh ($0)2025-02-14: Option exercise, 689 sh ($0)2025-02-13: Award / grant, 25,932 sh ($0)2025-02-13: Award / grant, 217 sh ($0)
XRAY · 20 trades
2026-12-31: Award / grant, 2,638 sh ($30K)2026-06-30: Award / grant, 2,842 sh ($30K)2026-06-12: Award / grant, 10,000 sh ($101K)2026-06-03: Award / grant, 22,822 sh ($0)2026-03-31: Award / grant, 2,645 sh ($30K)2026-01-09: Award / grant, 154 sh ($2K)2026-01-09: Award / grant, 395 sh ($0)2025-10-10: Award / grant, 123 sh ($1K)2025-10-10: Award / grant, 360 sh ($0)2025-09-30: Award / grant, 2,386 sh ($30K)2025-07-11: Award / grant, 75 sh ($1K)2025-07-11: Award / grant, 279 sh ($0)2025-07-01: Award / grant, 1,561 sh ($25K)2025-05-22: Award / grant, 13,880 sh ($0)2025-04-11: Award / grant, 75 sh ($934)2025-04-11: Award / grant, 148 sh ($0)2025-03-31: Award / grant, 1,687 sh ($25K)2025-01-10: Award / grant, 39 sh ($713)2025-01-10: Award / grant, 115 sh ($0)2024-12-30: Award / grant, 1,340 sh ($25K)
PODD · 1 trade
2026-07-01: Award / grant, 1,355 sh ($0)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2026-02-26IDXXSale3,660 @ $658.92$2.4M−3.9% of holding91,254Form 4
2026-02-26IDXXSale2,859 @ $659.75$1.9M−3.1% of holding88,395Form 4
2026-02-26IDXXSale2,860 @ $657.84$1.9M−2.9% of holding94,914Form 4
2026-02-26IDXXSale2,589 @ $663.04$1.7M−3.0% of holding83,606Form 4
2026-02-26IDXXSale1,669 @ $652.49$1.1M−1.6% of holding102,887Form 4
2026-02-26IDXXSale1,488 @ $655.85$976K−1.5% of holding99,117Form 4
2026-02-26IDXXSale1,343 @ $656.85$882K−1.4% of holding97,774Form 4
2026-02-26IDXXSale1,281 @ $650.67$834K−1.2% of holding105,651Form 4
2026-02-26IDXXSale1,200 @ $661.10$793K−1.4% of holding87,195Form 4
2026-02-26IDXXSale1,171 @ $653.68$765K−1.1% of holding101,716Form 4
2026-02-26IDXXSale1,111 @ $654.63$727K−1.1% of holding100,605Form 4
2026-02-26IDXXSale1,095 @ $651.49$713K−1.0% of holding104,556Form 4
2026-02-26IDXXSale1,000 @ $662.16$662K−1.1% of holding86,195Form 4
2025-08-06IDXXSale7,299 @ $631.61$4.6M−7.3% of holding93,199Form 4
2025-08-06IDXXSale6,056 @ $630.59$3.8M−5.7% of holding100,498Form 4
2025-08-06IDXXSale3,526 @ $635.13$2.2M−3.9% of holding86,673Form 4
2025-08-06IDXXSale3,397 @ $629.82$2.1M−3.1% of holding106,554Form 4
2025-08-06IDXXSale3,000 @ $632.56$1.9M−3.2% of holding90,199Form 4
2025-08-06IDXXSale1,822 @ $636.15$1.2M−2.1% of holding84,851Form 4
2025-08-06IDXXSale1,525 @ $628.27$958K−1.4% of holding109,951Form 4
2025-08-06IDXXSale1,095 @ $626.90$686K−1.0% of holding111,476Form 4
2025-08-06IDXXSale880 @ $636.81$560K−1.0% of holding83,971Form 4
2025-08-06IDXXSale660 @ $639.37$422K−0.8% of holding83,311Form 4
47 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-12-31XRAYAward / grant2,63814,382Form 4
2026-07-01PODDAward / grant1,3551,355Form 4
2026-06-30XRAYAward / grant2,84220,022Form 4
2026-06-12XRAYAward / grant10,00061,669Form 4
2026-06-03XRAYAward / grant22,82251,669Form 4
2026-03-31XRAYAward / grant2,64517,180Form 4
2026-02-27IDXXOption exercise19783,803Form 4
2026-02-27IDXXOption exercise1970Form 4
2026-02-26IDXXOption exercise23,326106,932Form 4
2026-02-26IDXXOption exercise23,3260Form 4
2026-02-14IDXXWithheld for tax91583,606Form 4
2026-02-14IDXXOption exercise1,09984,521Form 4
2026-02-14IDXXOption exercise1,0991,099Form 4
2026-02-14IDXXOption exercise9580Form 4
2026-02-14IDXXOption exercise95883,422Form 4
2026-02-12IDXXAward / grant13,40713,407Form 4
2026-01-09XRAYAward / grant15414,535Form 4
2026-01-09XRAYAward / grant39528,847Form 4
2025-10-10XRAYAward / grant12311,744Form 4
2025-10-10XRAYAward / grant36028,451Form 4
2025-09-30XRAYAward / grant2,38611,620Form 4
2025-08-15IDXXGift1,05182,443Form 4
2025-08-08IDXXOption exercise18383,494Form 4
2025-08-08IDXXOption exercise1830Form 4
2025-08-08IDXXOption exercise1830Form 4
2025-08-06IDXXOption exercise29,260112,571Form 4
2025-08-06IDXXOption exercise29,2600Form 4
2025-08-06IDXXOption exercise29,2600Form 4
2025-07-11XRAYAward / grant759,234Form 4
2025-07-11XRAYAward / grant27928,092Form 4
2025-07-01XRAYAward / grant1,5619,159Form 4
2025-05-22XRAYAward / grant13,88027,812Form 4
2025-04-11XRAYAward / grant757,598Form 4
2025-04-11XRAYAward / grant14813,932Form 4
2025-03-31XRAYAward / grant1,6877,523Form 4
2025-02-14IDXXWithheld for tax1,22283,283Form 4
2025-02-14IDXXOption exercise68982,447Form 4
2025-02-14IDXXOption exercise1,1002,198Form 4
2025-02-14IDXXOption exercise958958Form 4
2025-02-14IDXXOption exercise1,10084,505Form 4

Source: SEC Form 4 filings. Each row links to its original filing.

Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.