John Steinhardt
CIK 1296971 · View on SEC EDGAR ↗
Insider
First SEC filing: Nov. 19, 2004 · Latest: Nov. 19, 2004
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 42 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
42 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Feb. 5, 2019 | MKTX | S | 3,187 | $215.62 | $687,181 | 21,712 Direct | -12.80% | Disposed | -24.6% (price as of 2026-08-18) |
| Nov. 14, 2017 | MKTX | S | 4,225 | $174.00 | $735,150 | 23,614 Direct | -15.18% | Disposed | -6.6% (price as of 2026-08-18) |
| Feb. 7, 2017 | MKTX | S | 2,500 | $190.04 | $475,100 | 23,096 Direct | -9.77% | Disposed | -14.4% (price as of 2026-08-18) |
| April 29, 2014 | MKTX | S | 8,800 | $54.03 | $475,464 | 22,401 Direct | -28.20% | Disposed | 200.9% (price as of 2026-08-18) |
| April 28, 2014 | MKTX | S | 1,200 | $54.98 | $65,976 | 22,401 Direct | -5.08% | Disposed | 195.7% (price as of 2026-08-18) |
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 |
|---|---|---|---|---|---|---|---|
| Feb. 5, 2019 | MKTX | Stock Option (right to buy) | Common Stock (3,187) | $10.77 | July 30, 2019 | 3,187 | Disposed |
| Nov. 14, 2017 | MKTX | Stock Option (right to buy) | Common Stock (4,225) | $9.72 | Aug. 1, 2018 | 4,225 | Disposed |
| Feb. 7, 2017 | MKTX | Employee Stock Option (right to buy) | Common Stock (2,500) | $16.99 | Aug. 3, 2017 | 2,500 | Disposed |
| March 1, 2016 | MKTX | Employee Stock Option (right to buy) | Common Stock (5,000) | $9.30 | Aug. 4, 2016 | 5,000 | Disposed |
| March 9, 2015 | MKTX | Employee Stock Option (right to buy) | Common Stock (5,000) | $10.04 | Aug. 15, 2015 | 5,000 | Disposed |
| April 29, 2014 | MKTX | Employee Stock Option (right to buy) | Common Stock (8,800) | $11.00 | Nov. 4, 2014 | 8,800 | Disposed |
| April 28, 2014 | MKTX | Employee Stock Option (right to buy) | Common Stock (1,200) | $11.00 | Nov. 4, 2014 | 1,200 | Disposed |
| July 30, 2009 | MKTX | Employee Stock Option (right to buy) | Common Stock (3,187) | $10.77 | July 30, 2019 | 3,187 | Acquired |
| Aug. 1, 2008 | MKTX | Non-Qualified Stock Option (right to buy) | Common Stock (4,225) | $9.72 | Aug. 1, 2018 | 4,225 | Acquired |
| Aug. 3, 2007 | MKTX | Employee Stock Option (right to buy) | Common Stock (2,500) | $16.99 | Aug. 3, 2017 | 2,500 | Acquired |
| Aug. 4, 2006 | MKTX | Employee Stock Option (right to buy) | Common Stock (5,000) | $9.30 | Aug. 4, 2016 | 5,000 | Acquired |
| Aug. 4, 2006 | MKTX | Employee Stock Options (right to buy) | Common Stock (10,000) | $9.30 | Aug. 4, 2016 | 5,000 | Acquired |
| Aug. 15, 2005 | MKTX | Employee Stock Option (right to buy) | Common Stock (5,000) | $10.04 | Aug. 15, 2015 | 5,000 | 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. 19, 2004 | MKTX | Stock Option (right to buy)→ Common Stock, par value $0.003 per share (10,000) | 10,000 | Direct |