John A Mulder

CIK 1232671 · View on SEC EDGAR ↗

Insider

First SEC filing: Jan. 31, 2018 · Latest: Jan. 31, 2018

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Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 43 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

43 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
Nov. 5, 2015 GNTX S 4,600 $16.60 $76,360 71,104 Direct -6.08% Disposed 41.9% (price as of 2026-08-20)
Nov. 4, 2015 GNTX S 1,400 $16.63 $23,282 75,704 Direct -1.82% Disposed 41.6% (price as of 2026-08-20)
Feb. 6, 2015 GNTX S 12,000 $17.25 $207,000 140,104 Direct -7.89% Disposed 36.6% (price as of 2026-08-20)
Aug. 27, 2014 GNTX S 4,256 $29.57 $125,850 40,052 Direct -9.61% Disposed 59.3% (price as of 2026-08-20)
Feb. 11, 2014 GNTX S 6,000 $31.51 $189,060 74,308 Direct -7.47% Disposed 49.5% (price as of 2026-08-20)
Feb. 10, 2014 GNTX S 6,000 $31.35 $188,100 80,308 Direct -6.95% Disposed 50.3% (price as of 2026-08-20)
Dec. 21, 2012 GNTX S 8,000 $18.60 $148,800 44,308 Direct -15.29% Disposed 153.3% (price as of 2026-08-20)
Dec. 7, 2010 GNTX S 30,000 $27.15 $814,500 53,308 Direct -36.01% Disposed 73.5% (price as of 2026-08-20)
Nov. 8, 2010 GNTX S 20,000 $22.00 $440,000 53,308 Direct -27.28% Disposed 114.1% (price as of 2026-08-20)
May 3, 2010 GNTX S 23,212 $21.95 $509,503 73,308 Direct -24.05% Disposed 114.6% (price as of 2026-08-20)
Feb. 11, 2010 GNTX S 12,000 $18.71 $224,520 73,308 Direct -14.07% Disposed 151.8% (price as of 2026-08-20)
June 11, 2009 GNTX S 3,000 $13.55 $40,650 103,308 Direct -2.82% Disposed 247.7% (price as of 2026-08-20)
Aug. 12, 2008 GNTX S 10,000 $16.19 $161,900 106,308 Direct -8.60% Disposed 191.0% (price as of 2026-08-20)
May 2, 2008 GNTX S 4,000 $19.06 $76,240 116,308 Direct -3.32% Disposed 147.2% (price as of 2026-08-20)
May 23, 2007 GNTX S 9,000 $18.29 $164,610 130,308 Direct -6.46% Disposed 157.6% (price as of 2026-08-20)
Dec. 27, 2006 GNTX S 10,000 $16.05 $160,500 139,308 Direct -6.70% Disposed 193.5% (price as of 2026-08-20)
Sept. 23, 2005 GNTX S 20,712 $17.08 $353,761 0 Indirect -100.00% Disposed 175.8% (price as of 2026-08-20)
Sept. 22, 2005 GNTX S 17,288 $17.00 $293,896 20,712 Indirect -45.49% Disposed 177.1% (price as of 2026-08-20)
Sept. 21, 2005 GNTX S 12,000 $17.08 $204,960 38,000 Indirect -24.00% Disposed 175.8% (price as of 2026-08-20)
May 19, 2005 GNTX S 7,285 $18.91 $137,759 151,708 Direct -4.58% Disposed 149.1% (price as of 2026-08-20)
May 19, 2005 GNTX S 1,715 $18.94 $32,482 158,993 Direct -1.07% Disposed 148.7% (price as of 2026-08-20)
Oct. 17, 2003 GNTX S 12,066 $38.94 $469,850 82,354 Direct -12.78% Disposed 142.0% (price as of 2026-08-20)

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
May 21, 2015 GNTX Non-Employee Director Stock Option Grant Common Stock (7,000) $17.46 May 21, 2025 7,000 Acquired
Feb. 6, 2015 GNTX Employee Stock Option (Right to Buy) Common Stock (12,000) $12.36 May 16, 2023 12,000 Disposed
May 15, 2014 GNTX Non-Employee Director Stock Option Grant Common Stock (7,000) $28.60 May 15, 2024 7,000 Acquired
Feb. 6, 2014 GNTX Employee Stock Option (Right to Buy) Common Stock (6,000) $22.39 May 17, 2022 6,000 Disposed
Feb. 6, 2014 GNTX Employee Stock Option (Right to Buy) Common Stock (6,000) $21.12 May 13, 2020 6,000 Disposed
May 16, 2013 GNTX Non-Employee Director Stock Option Grant Common Stock (6,000) $24.73 May 16, 2023 6,000 Acquired
May 17, 2012 GNTX Non-Employee Director Stock Option Grant Common Stock (6,000) $22.39 May 17, 2022 6,000 Acquired
May 12, 2011 GNTX Non-Employee Director Stock Option Grant Common Stock (6,000) $31.71 May 12, 2021 6,000 Acquired
Dec. 7, 2010 GNTX Employee Stock Option (Right to Buy) Common Stock (6,000) $19.34 May 15, 2018 6,000 Disposed
Dec. 7, 2010 GNTX Employee Stock Option (Right to Buy) Common Stock (6,000) $18.41 May 10, 2017 6,000 Disposed
Dec. 7, 2010 GNTX Employee Stock Option (Right to Buy) Common Stock (6,000) $17.71 May 12, 2015 6,000 Disposed
Dec. 7, 2010 GNTX Employee Stock Option (Right to Buy) Common Stock (12,000) $18.04 May 13, 2014 12,000 Disposed
May 13, 2010 GNTX Non-Employee Director Stock Option Grant Common Stock (6,000) $21.12 May 13, 2020 6,000 Acquired
May 3, 2010 GNTX Employee Stock Option (Right to Buy) Common Stock (12,000) $15.92 May 14, 2013 12,000 Disposed
May 3, 2010 GNTX Employee Stock Option (Right to Buy) Common Stock (11,212) $15.05 June 3, 2012 11,212 Disposed
Feb. 11, 2010 GNTX Employee Stock Option (Right to Buy) Common Stock (6,000) $11.09 May 14, 2019 6,000 Disposed
Feb. 11, 2010 GNTX Employee Stock Option (Right to Buy) Common Stock (6,000) $14.76 May 11, 2016 6,000 Disposed
May 14, 2009 GNTX Non-Employee Director Stock Option Grant Common Stock (6,000) $11.09 May 14, 2019 6,000 Acquired
May 15, 2008 GNTX Non-Employee Director Stock Option Grant Common Stock (6,000) $19.34 May 15, 2018 6,000 Acquired
May 10, 2007 GNTX Non-Employee Director Stock Option Grant Common Stock (6,000) $18.41 May 10, 2017 6,000 Acquired
May 11, 2006 GNTX Non-Employee Director Stock Option Grant Common Stock (6,000) $14.76 May 11, 2016 6,000 Acquired
May 12, 2005 GNTX Non-Employee Director Stock Option Grant Common Stock (6,000) $17.71 May 12, 2015 6,000 Acquired
May 13, 2004 GNTX Non-Employee Director Stock Option Grant Common Stock (6,000) $36.07 May 13, 2014 6,000 Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).