Nicholas Themelis
CIK 1296468 · View on SEC EDGAR ↗
Insider
First SEC filing: Nov. 4, 2004 · Latest: Nov. 4, 2004
On this page
- Insider at Companies where this person is a reporting insider.
- Insider transactions Every share this person bought or sold, from Form 4 filings.
- Derivatives Options and other derivative holdings reported by this person.
- Initial holdings The stakes this person held when they first started reporting.
- Compensation Executive pay disclosed in company proxy statements.
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 25 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
25 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| March 7, 2022 | MKTX | S 10b5-1 | 138 | $371.38 | $51,250 | 8,544 Direct | -1.59% | Disposed | -56.4% (price as of 2026-08-20) |
| March 7, 2022 | MKTX | S 10b5-1 | 325 | $370.37 | $120,370 | 8,682 Direct | -3.61% | Disposed | -56.3% (price as of 2026-08-20) |
| March 7, 2022 | MKTX | S 10b5-1 | 171 | $368.87 | $63,077 | 9,007 Direct | -1.86% | Disposed | -56.1% (price as of 2026-08-20) |
| March 7, 2022 | MKTX | S 10b5-1 | 315 | $367.42 | $115,737 | 9,178 Direct | -3.32% | Disposed | -56.0% (price as of 2026-08-20) |
| March 7, 2022 | MKTX | S 10b5-1 | 200 | $366.39 | $73,278 | 9,493 Direct | -2.06% | Disposed | -55.8% (price as of 2026-08-20) |
| March 7, 2022 | MKTX | S 10b5-1 | 8 | $365.16 | $2,921 | 9,693 Direct | -0.08% | Disposed | -55.7% (price as of 2026-08-20) |
| March 7, 2022 | MKTX | S 10b5-1 | 212 | $361.91 | $76,725 | 9,701 Direct | -2.14% | Disposed | -55.3% (price as of 2026-08-20) |
| March 7, 2022 | MKTX | S 10b5-1 | 109 | $361.01 | $39,350 | 9,913 Direct | -1.09% | Disposed | -55.2% (price as of 2026-08-20) |
| March 7, 2022 | MKTX | S 10b5-1 | 98 | $359.18 | $35,200 | 10,022 Direct | -0.97% | Disposed | -55.0% (price as of 2026-08-20) |
| March 7, 2022 | MKTX | S 10b5-1 | 424 | $358.18 | $151,868 | 10,120 Direct | -4.02% | Disposed | -54.8% (price as of 2026-08-20) |
| Dec. 7, 2021 | MKTX | S 10b5-1 | 322 | $372.75 | $120,026 | 9,587 Direct | -3.25% | Disposed | -56.6% (price as of 2026-08-20) |
| Dec. 7, 2021 | MKTX | S 10b5-1 | 500 | $371.45 | $185,725 | 9,909 Direct | -4.80% | Disposed | -56.4% (price as of 2026-08-20) |
| Dec. 7, 2021 | MKTX | S 10b5-1 | 578 | $370.57 | $214,189 | 10,409 Direct | -5.26% | Disposed | -56.3% (price as of 2026-08-20) |
| Dec. 7, 2021 | MKTX | S 10b5-1 | 300 | $368.90 | $110,670 | 10,987 Direct | -2.66% | Disposed | -56.1% (price as of 2026-08-20) |
| Dec. 7, 2021 | MKTX | S 10b5-1 | 100 | $366.99 | $36,699 | 11,287 Direct | -0.88% | Disposed | -55.9% (price as of 2026-08-20) |
| Dec. 7, 2021 | MKTX | S 10b5-1 | 200 | $364.28 | $72,856 | 11,387 Direct | -1.73% | Disposed | -55.6% (price as of 2026-08-20) |
| Sept. 7, 2021 | MKTX | S 10b5-1 | 200 | $473.40 | $94,680 | 11,587 Direct | -1.70% | Disposed | -65.8% (price as of 2026-08-20) |
| Sept. 7, 2021 | MKTX | S 10b5-1 | 200 | $466.01 | $93,202 | 11,787 Direct | -1.67% | Disposed | -65.3% (price as of 2026-08-20) |
| Sept. 7, 2021 | MKTX | S 10b5-1 | 100 | $463.33 | $46,333 | 11,987 Direct | -0.83% | Disposed | -65.1% (price as of 2026-08-20) |
| Sept. 7, 2021 | MKTX | S 10b5-1 | 100 | $461.31 | $46,131 | 12,087 Direct | -0.82% | Disposed | -64.9% (price as of 2026-08-20) |
| Sept. 7, 2021 | MKTX | S 10b5-1 | 500 | $460.36 | $230,180 | 12,187 Direct | -3.94% | Disposed | -64.9% (price as of 2026-08-20) |
| Sept. 7, 2021 | MKTX | S 10b5-1 | 800 | $458.58 | $366,864 | 12,687 Direct | -5.93% | Disposed | -64.7% (price as of 2026-08-20) |
| Sept. 7, 2021 | MKTX | S 10b5-1 | 100 | $456.85 | $45,685 | 13,487 Direct | -0.74% | Disposed | -64.6% (price as of 2026-08-20) |
| Aug. 11, 2021 | MKTX | S | 152 | $470.46 | $71,510 | 13,587 Direct | -1.11% | Disposed | -65.6% (price as of 2026-08-20) |
| Aug. 11, 2021 | MKTX | S | 135 | $468.88 | $63,299 | 13,739 Direct | -0.97% | Disposed | -65.5% (price as of 2026-08-20) |
| Aug. 11, 2021 | MKTX | S | 376 | $468.22 | $176,051 | 13,874 Direct | -2.64% | Disposed | -65.4% (price as of 2026-08-20) |
| Aug. 11, 2021 | MKTX | S | 347 | $466.45 | $161,858 | 14,250 Direct | -2.38% | Disposed | -65.3% (price as of 2026-08-20) |
| Aug. 11, 2021 | MKTX | S | 90 | $465.64 | $41,908 | 14,597 Direct | -0.61% | Disposed | -65.3% (price as of 2026-08-20) |
| Aug. 11, 2021 | MKTX | S | 502 | $464.71 | $233,284 | 14,687 Direct | -3.31% | Disposed | -65.2% (price as of 2026-08-20) |
| Aug. 11, 2021 | MKTX | S | 1,266 | $462.93 | $586,069 | 15,189 Direct | -7.69% | Disposed | -65.1% (price as of 2026-08-20) |
| Aug. 11, 2021 | MKTX | S | 654 | $462.13 | $302,233 | 16,455 Direct | -3.82% | Disposed | -65.0% (price as of 2026-08-20) |
| Aug. 11, 2021 | MKTX | S | 1,732 | $460.70 | $797,932 | 17,109 Direct | -9.19% | Disposed | -64.9% (price as of 2026-08-20) |
| Aug. 11, 2021 | MKTX | S | 1,179 | $460.06 | $542,411 | 18,841 Direct | -5.89% | Disposed | -64.8% (price as of 2026-08-20) |
| June 14, 2021 | MKTX | S | 2,287 | $449.13 | $1,027,160 | 13,587 Direct | -14.41% | Disposed | -64.0% (price as of 2026-08-20) |
| June 14, 2021 | MKTX | S | 4,713 | $448.40 | $2,113,309 | 15,874 Direct | -22.89% | Disposed | -63.9% (price as of 2026-08-20) |
| June 7, 2021 | MKTX | S 10b5-1 | 315 | $448.51 | $141,281 | 13,587 Direct | -2.27% | Disposed | -63.9% (price as of 2026-08-20) |
| June 7, 2021 | MKTX | S 10b5-1 | 464 | $447.47 | $207,626 | 13,902 Direct | -3.23% | Disposed | -63.8% (price as of 2026-08-20) |
| June 7, 2021 | MKTX | S 10b5-1 | 488 | $446.42 | $217,853 | 14,366 Direct | -3.29% | Disposed | -63.8% (price as of 2026-08-20) |
| June 7, 2021 | MKTX | S 10b5-1 | 441 | $445.57 | $196,496 | 14,854 Direct | -2.88% | Disposed | -63.7% (price as of 2026-08-20) |
| June 7, 2021 | MKTX | S 10b5-1 | 864 | $444.34 | $383,910 | 15,295 Direct | -5.35% | Disposed | -63.6% (price as of 2026-08-20) |
| June 7, 2021 | MKTX | S 10b5-1 | 1,043 | $443.40 | $462,466 | 16,159 Direct | -6.06% | Disposed | -63.5% (price as of 2026-08-20) |
| June 7, 2021 | MKTX | S 10b5-1 | 385 | $442.52 | $170,370 | 17,202 Direct | -2.19% | Disposed | -63.4% (price as of 2026-08-20) |
| March 5, 2021 | MKTX | S 10b5-1 | 300 | $488.10 | $146,430 | 17,587 Direct | -1.68% | Disposed | -66.9% (price as of 2026-08-20) |
| March 5, 2021 | MKTX | S 10b5-1 | 300 | $483.63 | $145,089 | 17,887 Direct | -1.65% | Disposed | -66.5% (price as of 2026-08-20) |
| March 5, 2021 | MKTX | S 10b5-1 | 103 | $481.01 | $49,544 | 18,187 Direct | -0.56% | Disposed | -66.4% (price as of 2026-08-20) |
| March 5, 2021 | MKTX | S 10b5-1 | 352 | $479.78 | $168,883 | 18,290 Direct | -1.89% | Disposed | -66.3% (price as of 2026-08-20) |
| March 5, 2021 | MKTX | S 10b5-1 | 200 | $478.19 | $95,638 | 18,642 Direct | -1.06% | Disposed | -66.2% (price as of 2026-08-20) |
| March 5, 2021 | MKTX | S 10b5-1 | 639 | $477.04 | $304,829 | 18,842 Direct | -3.28% | Disposed | -66.1% (price as of 2026-08-20) |
| March 5, 2021 | MKTX | S 10b5-1 | 1,206 | $476.36 | $574,490 | 19,481 Direct | -5.83% | Disposed | -66.0% (price as of 2026-08-20) |
| March 5, 2021 | MKTX | S 10b5-1 | 900 | $474.60 | $427,140 | 20,687 Direct | -4.17% | Disposed | -65.9% (price as of 2026-08-20) |
| Dec. 7, 2020 | MKTX | S 10b5-1 | 63 | $553.10 | $34,845 | 26,192 Direct | -0.24% | Disposed | -70.7% (price as of 2026-08-20) |
| Dec. 7, 2020 | MKTX | S 10b5-1 | 410 | $549.59 | $225,332 | 26,255 Direct | -1.54% | Disposed | -70.6% (price as of 2026-08-20) |
| Dec. 7, 2020 | MKTX | S 10b5-1 | 697 | $548.21 | $382,102 | 27,195 Direct | -2.50% | Disposed | -70.5% (price as of 2026-08-20) |
| Dec. 7, 2020 | MKTX | S 10b5-1 | 530 | $547.34 | $290,090 | 26,665 Direct | -1.95% | Disposed | -70.4% (price as of 2026-08-20) |
| Dec. 7, 2020 | MKTX | S 10b5-1 | 305 | $546.31 | $166,625 | 27,892 Direct | -1.08% | Disposed | -70.4% (price as of 2026-08-20) |
| Dec. 7, 2020 | MKTX | S 10b5-1 | 1,464 | $545.14 | $798,085 | 28,197 Direct | -4.94% | Disposed | -70.3% (price as of 2026-08-20) |
| Dec. 7, 2020 | MKTX | S 10b5-1 | 531 | $544.04 | $288,885 | 29,661 Direct | -1.76% | Disposed | -70.3% (price as of 2026-08-20) |
| Oct. 29, 2020 | MKTX | S | 5,598 | $557.81 | $3,122,620 | 30,192 Direct | -15.64% | Disposed | -71.0% (price as of 2026-08-20) |
| Oct. 29, 2020 | MKTX | S | 600 | $556.69 | $334,014 | 35,790 Direct | -1.65% | Disposed | -70.9% (price as of 2026-08-20) |
| Oct. 29, 2020 | MKTX | S | 100 | $554.23 | $55,423 | 36,390 Direct | -0.27% | Disposed | -70.8% (price as of 2026-08-20) |
| Oct. 29, 2020 | MKTX | S | 9,324 | $553.21 | $5,158,130 | 36,490 Direct | -20.35% | Disposed | -70.8% (price as of 2026-08-20) |
| Oct. 29, 2020 | MKTX | S | 1,440 | $552.06 | $794,966 | 45,814 Direct | -3.05% | Disposed | -70.7% (price as of 2026-08-20) |
| Oct. 29, 2020 | MKTX | S | 200 | $551.27 | $110,254 | 47,254 Direct | -0.42% | Disposed | -70.7% (price as of 2026-08-20) |
| Sept. 9, 2020 | MKTX | S 10b5-1 | 524 | $459.65 | $240,857 | 30,192 Direct | -1.71% | Disposed | -64.8% (price as of 2026-08-20) |
| Sept. 9, 2020 | MKTX | S 10b5-1 | 200 | $458.48 | $91,696 | 30,716 Direct | -0.65% | Disposed | -64.7% (price as of 2026-08-20) |
| Sept. 9, 2020 | MKTX | S 10b5-1 | 1,779 | $457.69 | $814,231 | 30,916 Direct | -5.44% | Disposed | -64.7% (price as of 2026-08-20) |
| Sept. 9, 2020 | MKTX | S 10b5-1 | 745 | $456.45 | $340,055 | 32,695 Direct | -2.23% | Disposed | -64.6% (price as of 2026-08-20) |
| Sept. 9, 2020 | MKTX | S 10b5-1 | 201 | $455.08 | $91,471 | 33,440 Direct | -0.60% | Disposed | -64.4% (price as of 2026-08-20) |
| Sept. 9, 2020 | MKTX | S 10b5-1 | 351 | $453.47 | $159,168 | 33,641 Direct | -1.03% | Disposed | -64.3% (price as of 2026-08-20) |
| Sept. 9, 2020 | MKTX | S 10b5-1 | 200 | $450.90 | $90,180 | 33,992 Direct | -0.58% | Disposed | -64.1% (price as of 2026-08-20) |
| May 8, 2020 | MKTX | S 10b5-1 | 855 | $476.85 | $407,707 | 37,337 Direct | -2.24% | Disposed | -66.1% (price as of 2026-08-20) |
| May 8, 2020 | MKTX | S 10b5-1 | 988 | $477.92 | $472,185 | 36,349 Direct | -2.65% | Disposed | -66.1% (price as of 2026-08-20) |
| May 8, 2020 | MKTX | S 10b5-1 | 438 | $478.86 | $209,741 | 35,911 Direct | -1.20% | Disposed | -66.2% (price as of 2026-08-20) |
| May 8, 2020 | MKTX | S 10b5-1 | 314 | $479.66 | $150,613 | 35,597 Direct | -0.87% | Disposed | -66.3% (price as of 2026-08-20) |
| May 8, 2020 | MKTX | S 10b5-1 | 1,405 | $482.84 | $678,390 | 34,192 Direct | -3.95% | Disposed | -66.5% (price as of 2026-08-20) |
Showing latest 100 of 288 transactions
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| Aug. 11, 2021 | MKTX | Stock Option (right to buy) | Common Stock (6,433) | $103.30 | Jan. 31, 2022 | 6,433 | Disposed |
| June 14, 2021 | MKTX | Stock Option (right to buy) | Common Stock (7,000) | $103.30 | Jan. 31, 2022 | 7,000 | Disposed |
| Oct. 29, 2020 | MKTX | Stock Option (right to buy) | Common Stock (3,830) | $156.85 | Jan. 15, 2023 | 3,830 | Disposed |
| Oct. 29, 2020 | MKTX | Stock Option (right to buy) | Common Stock (13,432) | $103.30 | Jan. 31, 2022 | 13,432 | Disposed |
| Nov. 2, 2017 | MKTX | Employee Stock Option (right to buy) | Common Stock (4,000) | $10.93 | Jan. 15, 2018 | 4,000 | Disposed |
| June 9, 2017 | MKTX | Employee Stock Option (right to buy) | Common Stock (5,596) | $10.93 | Jan. 15, 2018 | 5,596 | Disposed |
| Feb. 9, 2017 | MKTX | Employee Stock Option (Right to Buy) | Common Stock (10,468) | $10.93 | Jan. 15, 2018 | 10,468 | Disposed |
| Jan. 15, 2017 | MKTX | Employee Stock Option (right to buy) | Common Stock (3,830) | $156.85 | Jan. 15, 2023 | 3,830 | Acquired |
| Jan. 22, 2016 | MKTX | Employee Stock Option (right to buy) | Common Stock (26,865) | $103.30 | Jan. 31, 2022 | 26,865 | Acquired |
| Jan. 14, 2015 | MKTX | Empoyee Stock Option (Right to Buy) | Common Stock (8,646) | $11.18 | Jan. 9, 2016 | 8,646 | Disposed |
| Jan. 14, 2015 | MKTX | Empoyee Stock Option (Right to Buy) | Common Stock (1,403) | $12.96 | Jan. 12, 2017 | 1,403 | Disposed |
| Jan. 14, 2015 | MKTX | Empoyee Stock Option (Right to Buy) | Common Stock (15,786) | $10.93 | Jan. 15, 2018 | 15,786 | Disposed |
| Nov. 13, 2014 | MKTX | Common Stock (Right to Buy) | Common Stock (2,538) | $15.60 | Jan. 6, 2015 | 2,538 | Disposed |
| Nov. 20, 2013 | MKTX | Employee Stock Option (right to buy) | Common Stock (6,659) | $12.96 | Jan. 12, 2017 | 6,659 | Disposed |
| Nov. 19, 2013 | MKTX | Employee Stock Option (right to buy) | Common Stock (20,818) | $12.96 | Jan. 12, 2017 | 20,818 | Disposed |
| Dec. 13, 2012 | MKTX | Employee Stock Option (right to buy) | Common Stock (41,749) | $13.95 | Feb. 25, 2014 | 41,749 | Disposed |
| Dec. 12, 2012 | MKTX | Employee Stock Option (right to buy) | Common Stock (16,904) | $13.95 | Feb. 25, 2014 | 16,904 | Disposed |
| Dec. 11, 2012 | MKTX | Employee Stock Option (right to buy) | Common Stock (16,278) | $13.95 | Feb. 25, 2014 | 16,278 | Disposed |
| Dec. 10, 2012 | MKTX | Employee Stock Option (right to buy) | Common Stock (25,069) | $13.95 | Feb. 25, 2014 | 25,069 | Disposed |
| June 12, 2012 | MKTX | Employee Stock Option (right to buy) | Common Stock (32,379) | $15.60 | Jan. 6, 2015 | 32,379 | Disposed |
| June 11, 2012 | MKTX | Employee Stock Option (right to buy) | Common Stock (5,083) | $15.60 | Jan. 6, 2015 | 5,083 | Disposed |
| Nov. 7, 2011 | MKTX | Employee Stock Option (right to buy) | Common Stock (5,605) | $12.96 | Jan. 12, 2017 | 5,605 | Disposed |
| Nov. 4, 2011 | MKTX | Employee Stock Option (right to buy) | Common Stock (40,515) | $12.96 | Jan. 12, 2017 | 40,515 | Disposed |
| Nov. 4, 2011 | MKTX | Employee Stock Option (right to buy) | Common Stock (36,354) | $11.18 | Jan. 9, 2016 | 36,354 | Disposed |
| Jan. 15, 2008 | MKTX | Employee Stock Option (right to buy) | Common Stock (35,850) | $10.93 | Jan. 15, 2018 | 35,850 | Acquired |
| Jan. 12, 2007 | MKTX | Employee Stock Option (right to buy) | Common Stock (75,000) | $12.96 | Jan. 12, 2017 | 75,000 | Acquired |
| Jan. 9, 2006 | MKTX | Employee Stock Option (right to buy) | Common Stock (45,000) | $11.18 | Jan. 9, 2006 | 45,000 | Acquired |
| Jan. 6, 2005 | MKTX | Employee Stock Option (right to buy) | Common Stock (40,000) | $15.60 | Jan. 6, 2015 | 40,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Nov. 4, 2004 | MKTX | Employee Stock Option (right to buy)→ Common Stock, par value $0.003 per share (100,000) | 100,000 | Direct |
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2021 | $300,000 | — | $1,644,312 | — | $1,000,000 | — | $10,000 | $2,954,312 |
| 2020 | $300,000 | — | $687,447 | — | $1,200,000 | — | $7,000 | $2,194,447 |
| 2019 | $300,000 | $1,200,000 | $411,128 | — | — | — | $7,000 | $1,918,128 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.