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Quanterix Corp (QTRX) · Insider trading

What Quanterix's directors, officers and largest holders bought and sold themselves, from the Form 4 each of them files with the SEC within two business days of a trade. Open-market purchases and sales first: those are the trades somebody chose to make at the market price.

Bought, 12 months
$296,049
2 insiders, 3 trades
Sold, 12 months
$0
0 insiders
Net, 12 months
+$296,049
bought less sold
Latest filing
2026-10-16
filings read to 2026-10-19

Bought and sold at the market, by month

Two years. Purchases above the line, sales below, in dollars.

2025-01 2025-06: $2.87M bought 2025-07 2025-09: $19,878 bought 2026-01 2026-05: $9,695 bought 2026-07 2026-08: $286,354 bought
Bought Sold Largest month: $2.87M

Who traded, two years

InsiderBoughtSold TradesLast tradeHolds after
Walt David RDirector $2.12M – 4 2025-06-13 1,866,933
Donnelly William PDirector $792,889 – 3 2026-08-13 –
Toloue MasoudDirector, President & CEO $248,778 – 1 2025-06-09 518,922
Sriram VandanaChief Financial Officer $19,878 – 1 2025-09-12 87,200
Meadows BenjaminChief Commercial Officer $9,695 – 1 2026-05-12 3,500

Open-market purchases and sales

Newest first. “Plan” marks a trade made under a 10b5-1 plan set up in advance.

DateInsiderTradeShares PriceValueHolds afterFiling
2026-08-13 Donnelly William PDirector Buyindirect 72,245 2.93 $211,678 99,400 Form 4
2026-08-12 Donnelly William PDirector Buyindirect 27,155 2.75 $74,676 27,155 Form 4
2026-05-12 Meadows BenjaminChief Commercial Officer Buy 3,500 2.77 $9,695 3,500 Form 4
2025-09-12 Sriram VandanaChief Financial Officer Buy 4,150 4.79 $19,878 87,200 Form 4
2025-06-13 Walt David RDirector Buy 123,990 6.14 $761,299 1,866,933 Form 4
2025-06-12 Walt David RDirector Buy 36,010 6.23 $224,342 1,742,943 Form 4
2025-06-09 Toloue MasoudDirector, President & CEO Buy 45,900 5.42 $248,778 518,922 Form 4
2025-06-09 Walt David RDirector Buy 78,131 5.34 $417,220 1,706,933 Form 4
2025-06-06 Donnelly William PDirector Buy 93,113 5.44 $506,535 139,094 Form 4
2025-06-06 Walt David RDirector Buy 131,869 5.43 $716,049 1,628,802 Form 4

Grants, exercises and other transactions

Pay, tax and paperwork rather than a choice to trade at the market price. Two years.

109 × shares withheld for tax66 × option exercise49 × grant or award
Show them
DateInsiderWhatShares PriceHolds afterFiling
2026-10-15 Miller Michael FrancisChief Technology Officer Option exercise M +81 – 38,533 Form 4
2026-10-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −25 3.07 38,508 Form 4
2026-10-15 Miller Michael FrancisChief Technology Officer Option exercise M +136 – 38,644 Form 4
2026-10-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −41 3.07 38,603 Form 4
2026-10-15 Miller Michael FrancisChief Technology Officer Option exercise M +135 – 38,738 Form 4
2026-10-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −41 3.07 38,697 Form 4
2026-10-15 Miller Michael FrancisChief Technology Officer Option exercise M +372 – 39,069 Form 4
2026-10-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −111 3.07 38,958 Form 4
2026-10-15 Miller Michael FrancisChief Technology Officer Option exercise M +834 – 39,792 Form 4
2026-10-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −249 3.07 39,543 Form 4
2026-10-02 Magovcevic-Liebisch IvanaDirector Option exercise M +4,224 – 15,883 Form 4
2026-10-01 Donnelly William PDirector Grant or award A +6,964 3.41 169,365 Form 4
2026-10-01 Mendel ScottDirector Grant or award A +4,398 3.41 28,454 Form 4
2026-09-15 Miller Michael FrancisChief Technology Officer Option exercise M +81 – 37,442 Form 4
2026-09-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −25 2.72 37,417 Form 4
2026-09-15 Miller Michael FrancisChief Technology Officer Option exercise M +136 – 37,553 Form 4
2026-09-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −41 2.72 37,512 Form 4
2026-09-15 Miller Michael FrancisChief Technology Officer Option exercise M +135 – 37,647 Form 4
2026-09-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −41 2.72 37,606 Form 4
2026-09-15 Miller Michael FrancisChief Technology Officer Option exercise M +372 – 37,978 Form 4
2026-09-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −111 2.72 37,867 Form 4
2026-09-15 Miller Michael FrancisChief Technology Officer Option exercise M +834 – 38,701 Form 4
2026-09-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −249 2.72 38,452 Form 4
2026-08-31 Miller Michael FrancisChief Technology Officer Option exercise M +159 – 37,409 Form 4
2026-08-31 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −48 2.67 37,361 Form 4
2026-08-19 Elliott Jeffrey ThomasDirector Option exercise M +3,955 – 15,345 Form 4
2026-08-17 Donnelly William PDirector Option exercise M +2,802 – 162,401 Form 4
2026-08-15 Miller Michael FrancisChief Technology Officer Option exercise M +81 – 36,240 Form 4
2026-08-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −25 2.59 36,215 Form 4
2026-08-15 Miller Michael FrancisChief Technology Officer Option exercise M +136 – 36,351 Form 4
2026-08-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −41 2.59 36,310 Form 4
2026-08-15 Miller Michael FrancisChief Technology Officer Option exercise M +135 – 36,445 Form 4
2026-08-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −41 2.59 36,404 Form 4
2026-08-15 Miller Michael FrancisChief Technology Officer Option exercise M +372 – 36,776 Form 4
2026-08-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −111 2.59 36,665 Form 4
2026-08-15 Miller Michael FrancisChief Technology Officer Option exercise M +834 – 37,499 Form 4
2026-08-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −249 2.59 37,250 Form 4
2026-07-31 Miller Michael FrancisChief Technology Officer Option exercise M +130 – 36,198 Form 4
2026-07-31 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −39 3.48 36,159 Form 4
2026-07-15 Miller Michael FrancisChief Technology Officer Option exercise M +81 – 35,058 Form 4
2026-07-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −25 4.24 35,033 Form 4
2026-07-15 Miller Michael FrancisChief Technology Officer Option exercise M +136 – 35,169 Form 4
2026-07-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −41 4.24 35,128 Form 4
2026-07-15 Miller Michael FrancisChief Technology Officer Option exercise M +135 – 35,263 Form 4
2026-07-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −41 4.24 35,222 Form 4
2026-07-15 Miller Michael FrancisChief Technology Officer Option exercise M +372 – 35,594 Form 4
2026-07-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −111 4.24 35,483 Form 4
2026-07-15 Miller Michael FrancisChief Technology Officer Option exercise M +834 – 36,317 Form 4
2026-07-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −249 4.24 36,068 Form 4
2026-07-08 Lai Goldman MylaDirector Option exercise M +8,073 – 15,041 Form 4
2026-07-08 Mendel ScottDirector Option exercise M +8,073 – 24,056 Form 4
2026-07-01 Donnelly William PDirector Grant or award A +5,472 4.34 160,305 Form 4
2026-07-01 Mendel ScottDirector Grant or award A +3,456 4.34 16,837 Form 4
2026-06-30 Miller Michael FrancisChief Technology Officer Option exercise M +130 – 35,016 Form 4
2026-06-30 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −39 4.32 34,977 Form 4
2026-06-15 Sriram VandanaChief Financial Officer Option exercise M +263 – 30,261 Form 4
2026-06-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −79 3.10 30,182 Form 4
2026-06-15 Sriram VandanaChief Financial Officer Option exercise M +514 – 30,696 Form 4
2026-06-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −154 3.10 30,542 Form 4
2026-06-15 Sriram VandanaChief Financial Officer Option exercise M +1,056 – 31,598 Form 4
2026-06-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −315 3.10 31,283 Form 4
2026-06-15 Miller Michael FrancisChief Technology Officer Option exercise M +81 – 33,876 Form 4
2026-06-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −25 3.10 33,851 Form 4
2026-06-15 Miller Michael FrancisChief Technology Officer Option exercise M +136 – 33,987 Form 4
2026-06-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −41 3.10 33,946 Form 4
2026-06-15 Miller Michael FrancisChief Technology Officer Option exercise M +135 – 34,081 Form 4
2026-06-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −41 3.10 34,040 Form 4
2026-06-15 Miller Michael FrancisChief Technology Officer Option exercise M +372 – 34,412 Form 4
2026-06-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −111 3.10 34,301 Form 4
2026-06-15 Miller Michael FrancisChief Technology Officer Option exercise M +834 – 35,135 Form 4
2026-06-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −249 3.10 34,886 Form 4
2026-05-31 Miller Michael FrancisChief Technology Officer Option exercise M +130 – 33,834 Form 4
2026-05-31 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −39 3.06 33,795 Form 4
2026-05-15 Sriram VandanaChief Financial Officer Option exercise M +263 – 28,976 Form 4
2026-05-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −79 2.75 28,897 Form 4
2026-05-15 Sriram VandanaChief Financial Officer Option exercise M +514 – 29,411 Form 4
2026-05-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −154 2.75 29,257 Form 4
2026-05-15 Sriram VandanaChief Financial Officer Option exercise M +1,056 – 30,313 Form 4
2026-05-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −315 2.75 29,998 Form 4
2026-05-15 Miller Michael FrancisChief Technology Officer Option exercise M +81 – 32,694 Form 4
2026-05-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −25 2.75 32,669 Form 4
2026-05-15 Miller Michael FrancisChief Technology Officer Option exercise M +136 – 32,805 Form 4
2026-05-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −41 2.75 32,764 Form 4
2026-05-15 Miller Michael FrancisChief Technology Officer Option exercise M +135 – 32,899 Form 4
2026-05-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −41 2.75 32,858 Form 4
2026-05-15 Miller Michael FrancisChief Technology Officer Option exercise M +372 – 33,230 Form 4
2026-05-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −111 2.75 33,119 Form 4
2026-05-15 Miller Michael FrancisChief Technology Officer Option exercise M +834 – 33,953 Form 4
2026-05-15 Miller Michael FrancisChief Technology Officer Shares withheld for tax F −249 2.75 33,704 Form 4
2026-04-30 Miller Michael FrancisChief Operating Officer Option exercise M +130 – 32,652 Form 4
2026-04-30 Miller Michael FrancisChief Operating Officer Shares withheld for tax F −39 3.13 32,613 Form 4
2026-04-15 Sriram VandanaChief Financial Officer Option exercise M +263 – 27,691 Form 4
2026-04-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −79 3.60 27,612 Form 4
2026-04-15 Sriram VandanaChief Financial Officer Option exercise M +514 – 28,126 Form 4
2026-04-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −154 3.60 27,972 Form 4
2026-04-15 Sriram VandanaChief Financial Officer Option exercise M +1,056 – 29,028 Form 4
2026-04-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −315 3.60 28,713 Form 4
2026-04-15 Miller Michael FrancisChief Operating Officer Option exercise M +81 – 31,512 Form 4
2026-04-15 Miller Michael FrancisChief Operating Officer Shares withheld for tax F −25 3.60 31,487 Form 4
2026-04-15 Miller Michael FrancisChief Operating Officer Option exercise M +136 – 31,623 Form 4
2026-04-15 Miller Michael FrancisChief Operating Officer Shares withheld for tax F −41 3.60 31,582 Form 4
2026-04-15 Miller Michael FrancisChief Operating Officer Option exercise M +135 – 31,717 Form 4
2026-04-15 Miller Michael FrancisChief Operating Officer Shares withheld for tax F −41 3.60 31,676 Form 4
2026-04-15 Miller Michael FrancisChief Operating Officer Option exercise M +372 – 32,048 Form 4
2026-04-15 Miller Michael FrancisChief Operating Officer Shares withheld for tax F −111 3.60 31,937 Form 4
2026-04-15 Miller Michael FrancisChief Operating Officer Option exercise M +834 – 32,771 Form 4
2026-04-15 Miller Michael FrancisChief Operating Officer Shares withheld for tax F −249 3.60 32,522 Form 4
2026-04-01 Donnelly William PDirector, Executive Chair Grant or award A +6,178 – 154,127 Form 4
2026-04-01 Mendel ScottDirector Grant or award A +4,310 – 12,527 Form 4
2026-03-31 Miller Michael FrancisChief Operating Officer Option exercise M +99 – 31,370 Form 4
2026-03-31 Miller Michael FrancisChief Operating Officer Shares withheld for tax F −30 3.52 31,340 Form 4
2026-03-31 Miller Michael FrancisChief Operating Officer Option exercise M +130 – 31,470 Form 4
2026-03-31 Miller Michael FrancisChief Operating Officer Shares withheld for tax F −39 3.52 31,431 Form 4
2026-03-15 Miller Michael FrancisChief Operating Officer Option exercise M +81 – 30,343 Form 4
2026-03-15 Miller Michael FrancisChief Operating Officer Shares withheld for tax F −29 4.72 30,314 Form 4
2026-03-15 Miller Michael FrancisChief Operating Officer Option exercise M +136 – 30,450 Form 4
2026-03-15 Miller Michael FrancisChief Operating Officer Shares withheld for tax F −48 4.72 30,402 Form 4
2026-03-15 Miller Michael FrancisChief Operating Officer Option exercise M +135 – 30,537 Form 4
2026-03-15 Miller Michael FrancisChief Operating Officer Shares withheld for tax F −48 4.72 30,489 Form 4
2026-03-15 Miller Michael FrancisChief Operating Officer Option exercise M +372 – 30,861 Form 4
2026-03-15 Miller Michael FrancisChief Operating Officer Shares withheld for tax F −131 4.72 30,730 Form 4
2026-03-15 Miller Michael FrancisChief Operating Officer Option exercise M +834 – 31,564 Form 4
2026-03-15 Miller Michael FrancisChief Operating Officer Shares withheld for tax F −293 4.72 31,271 Form 4
2026-03-15 Sriram VandanaChief Financial Officer Option exercise M +263 – 26,503 Form 4
2026-03-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −93 4.72 26,410 Form 4
2026-03-15 Sriram VandanaChief Financial Officer Option exercise M +514 – 26,924 Form 4
2026-03-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −181 4.72 26,743 Form 4
2026-03-15 Sriram VandanaChief Financial Officer Option exercise M +1,056 – 27,799 Form 4
2026-03-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −371 4.72 27,428 Form 4
2026-02-15 Sriram VandanaChief Financial Officer Option exercise M +514 – 26,248 Form 4
2026-02-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −179 5.74 26,069 Form 4
2026-02-15 Sriram VandanaChief Financial Officer Option exercise M +263 – 26,332 Form 4
2026-02-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −92 5.74 26,240 Form 4
2026-02-04 Sriram VandanaChief Financial Officer Shares withheld for tax F −4,395 – 81,618 Form 4
2026-01-15 Toloue MasoudDirector, President & CEO Shares withheld for tax F −1,817 7.95 507,310 Form 4
2026-01-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −274 7.95 86,013 Form 4
2026-01-02 Meister Paul MDirector Grant or award A +3,974 – 313,253 Form 4
2026-01-02 Magovcevic-Liebisch IvanaDirector Grant or award A +23,372 – 43,607 Form 4
2026-01-02 Elliott Jeffrey ThomasDirector Grant or award A +23,372 – 42,792 Form 4
2026-01-02 Lai Goldman MylaDirector Grant or award A +23,372 – 52,860 Form 4
2026-01-02 Lai Goldman MylaDirector Grant or award A +1,944 – 54,804 Form 4
2026-01-02 Walt David RDirector Grant or award A +1,215 – 1,872,890 Form 4
2026-01-02 Donnelly William PDirector, Executive Chair Grant or award A +2,377 – 150,751 Form 4
2026-01-02 Mendel ScottDirector Grant or award A +23,372 – 54,109 Form 4
2026-01-02 Mendel ScottDirector Grant or award A +1,944 – 56,053 Form 4
2026-01-02 Flynn KarenDirector Grant or award A +23,372 – 57,212 Form 4
2026-01-02 Hampton Malcolm GarretDirector Grant or award A +23,372 – 70,099 Form 4
2026-01-02 Sachs Alan BruceDirector Grant or award A +23,372 – 70,099 Form 4
2025-12-31 Toloue MasoudDirector, President & CEO Shares withheld for tax F −258 6.36 508,446 Form 4
2025-12-15 Toloue MasoudDirector, President & CEO Shares withheld for tax F −1,242 7.41 508,704 Form 4
2025-12-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −229 7.41 85,977 Form 4
2025-11-30 Toloue MasoudDirector, President & CEO Shares withheld for tax F −254 7.26 509,946 Form 4
2025-11-20 Sachs Alan BruceDirector Grant or award A +46,727 – 46,727 Form 4
2025-11-20 Hampton Malcolm GarretDirector Grant or award A +46,727 – 46,727 Form 4
2025-11-15 Toloue MasoudDirector, President & CEO Shares withheld for tax F −1,242 5.74 510,200 Form 4
2025-11-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −229 5.78 86,206 Form 4
2025-10-31 Toloue MasoudDirector, President & CEO Shares withheld for tax F −254 5.34 511,442 Form 4
2025-10-15 Toloue MasoudDirector, President & CEO Shares withheld for tax F −1,242 5.78 511,696 Form 4
2025-10-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −229 5.78 86,742 Form 4
2025-10-01 Lai Goldman MylaDirector Grant or award A +2,084 5.54 29,488 Form 4
2025-10-01 Walt David RDirector Grant or award A +2,594 5.54 1,871,675 Form 4
2025-10-01 Donnelly William PDirector Grant or award A +5,076 5.54 148,374 Form 4
2025-10-01 Mendel ScottDirector Grant or award A +2,084 5.54 30,737 Form 4
2025-09-30 Toloue MasoudDirector, President & CEO Shares withheld for tax F −254 5.43 512,938 Form 4
2025-09-15 Toloue MasoudDirector, President & CEO Shares withheld for tax F −1,242 4.97 513,192 Form 4
2025-09-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −229 4.97 86,971 Form 4
2025-08-31 Toloue MasoudDirector, President & CEO Shares withheld for tax F −254 4.55 514,434 Form 4
2025-08-15 Toloue MasoudDirector, President & CEO Shares withheld for tax F −1,242 4.57 514,688 Form 4
2025-08-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −229 4.57 83,050 Form 4
2025-07-31 Toloue MasoudDirector, President & CEO Shares withheld for tax F −254 5.94 515,930 Form 4
2025-07-15 Toloue MasoudDirector, President & CEO Shares withheld for tax F −1,242 5.49 516,184 Form 4
2025-07-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −229 5.49 83,279 Form 4
2025-07-08 Mendel ScottDirector Grant or award A +4,189 – 4,189 Form 4
2025-07-08 Mendel ScottDirector Grant or award A +24,464 – 28,653 Form 4
2025-07-08 Lai Goldman MylaDirector Grant or award A +2,940 – 2,940 Form 4
2025-07-08 Lai Goldman MylaDirector Grant or award A +24,464 – 27,404 Form 4
2025-07-01 Hlavinka Sarah E.Director Grant or award A +2,615 6.69 60,070 Form 4
2025-07-01 Walt David RDirector Grant or award A +2,148 6.69 1,869,081 Form 4
2025-07-01 Donnelly William PDirector Grant or award A +4,204 6.69 143,298 Form 4
2025-07-01 Meister Paul MDirector Grant or award A +2,242 6.69 309,279 Form 4
2025-06-30 Toloue MasoudDirector, President & CEO Shares withheld for tax F −254 6.65 517,426 Form 4
2025-06-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −229 6.06 83,508 Form 4
2025-06-15 Toloue MasoudDirector, President & CEO Shares withheld for tax F −1,242 6.06 517,680 Form 4
2025-05-31 Toloue MasoudDirector, President & CEO Shares withheld for tax F −254 5.20 473,022 Form 4
2025-05-15 Toloue MasoudDirector, President & CEO Shares withheld for tax F −1,242 4.50 473,276 Form 4
2025-05-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −229 4.50 83,737 Form 4
2025-04-30 Toloue MasoudDirector, President & CEO Shares withheld for tax F −254 5.76 474,518 Form 4
2025-04-15 Toloue MasoudDirector, President & CEO Shares withheld for tax F −1,242 5.16 474,772 Form 4
2025-04-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −229 5.36 83,966 Form 4
2025-04-01 Donnelly William PDirector Grant or award A +2,681 6.67 45,981 Form 4
2025-04-01 Hlavinka Sarah E.Director Grant or award A +2,625 6.67 57,455 Form 4
2025-04-01 Meister Paul MDirector Grant or award A +2,479 6.67 307,037 Form 4
2025-04-01 Walt David RDirector Grant or award A +2,156 6.67 1,496,933 Form 4
2025-03-31 Toloue MasoudDirector, President & CEO Shares withheld for tax F −254 6.51 476,014 Form 4
2025-03-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −229 7.06 84,195 Form 4
2025-03-15 Toloue MasoudDirector, President & CEO Shares withheld for tax F −1,242 7.06 476,268 Form 4
2025-02-28 Toloue MasoudDirector, President & CEO Shares withheld for tax F −247 7.59 477,510 Form 4
2025-02-15 Toloue MasoudDirector, President & CEO Shares withheld for tax F −752 8.05 477,757 Form 4
2025-02-15 Sriram VandanaChief Financial Officer Shares withheld for tax F −92 8.05 84,424 Form 4
2025-02-04 Toloue MasoudDirector, President & CEO Grant or award A +138,790 – 478,509 Form 4

How to read it

Buy, sale
Code P and S on the form: shares bought or sold in the market, at the market price. The other codes are mostly pay (a grant, an option exercised) or tax (shares the company withheld), and say little about what the insider thinks of the price.
Plan
A sale or purchase under a Rule 10b5-1 plan, set up in advance and running on its own schedule. Since April 2023 the form has a box for it. Much executive selling is planned and says more about diversifying than about the company.
Holds after
The shares the insider still held after the trade, in the form the trade was in (directly, or indirectly through a trust or a fund).
Value
Shares times the price the form reports, which is often an average over several fills on the day.

Read from the SEC's own quarterly data sets of Forms 3, 4 and 5, and from each day's filings since the last one. A correcting amendment replaces the lines it restates. Every row links to its filing. None of this is advice: insiders sell for many reasons, and buy for fewer.

Quanterix's scores and multiples ›