Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 70 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

70 other filings hidden
DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
Feb. 19, 2020 ZD S 18,281 $97.22 $1,777,279 92,626 Direct -16.48% Disposed -34.1% (price as of 2026-10-05)
Feb. 19, 2019 ZD S 4,350 $84.19 $366,226 90,334 Direct -4.59% Disposed -23.9% (price as of 2026-10-05)
April 18, 2018 ZD S 12,779 $81.63 $1,043,150 75,569 Direct -14.46% Disposed -21.5% (price as of 2026-10-05)
April 11, 2018 ZD S 10,000 $78.85 $788,500 75,569 Direct -11.69% Disposed -18.7% (price as of 2026-10-05)
May 10, 2017 ZD S 9,000 $88.67 $798,030 75,569 Direct -10.64% Disposed -27.7% (price as of 2026-10-05)
Aug. 27, 2015 ZD S 10b5-1 500 $68.78 $34,390 70,737 Direct -0.70% Disposed -6.9% (price as of 2026-10-05)
Aug. 27, 2015 ZD S 10b5-1 14,500 $68.31 $990,495 71,237 Direct -16.91% Disposed -6.2% (price as of 2026-10-05)
Aug. 20, 2015 ZD S 10b5-1 1,527 $72.43 $110,601 70,737 Direct -2.11% Disposed -11.5% (price as of 2026-10-05)
Aug. 20, 2015 ZD S 10b5-1 13,473 $71.92 $968,978 72,264 Direct -15.71% Disposed -10.9% (price as of 2026-10-05)
Aug. 13, 2015 ZD S 10b5-1 15,000 $73.05 $1,095,750 70,737 Direct -17.50% Disposed -12.3% (price as of 2026-10-05)
Aug. 6, 2015 ZD S 10b5-1 6,755 $74.29 $501,829 70,737 Direct -8.72% Disposed -13.8% (price as of 2026-10-05)
Aug. 6, 2015 ZD S 10b5-1 8,245 $73.63 $607,079 77,492 Direct -9.62% Disposed -13.0% (price as of 2026-10-05)
March 19, 2014 ZD S 8,945 $49.97 $446,982 64,033 Direct -12.26% Disposed 28.2% (price as of 2026-10-05)
March 19, 2014 ZD S 11,055 $49.05 $542,248 72,978 Direct -13.16% Disposed 30.6% (price as of 2026-10-05)
March 12, 2014 ZD S 20,000 $49.04 $980,800 64,033 Direct -23.80% Disposed 30.6% (price as of 2026-10-05)
March 5, 2014 ZD S 20,000 $51.35 $1,027,000 64,033 Direct -23.80% Disposed 24.8% (price as of 2026-10-05)
Feb. 26, 2014 ZD S 20,000 $50.90 $1,018,000 64,033 Direct -23.80% Disposed 25.9% (price as of 2026-10-05)
Feb. 19, 2014 ZD S 20,000 $49.92 $998,400 64,033 Direct -23.80% Disposed 28.3% (price as of 2026-10-05)
May 30, 2012 ZD S 10b5-1 10,000 $24.09 $240,900 59,727 Direct -14.34% Disposed 165.9% (price as of 2026-10-05)
May 16, 2012 ZD S 10b5-1 10,000 $24.46 $244,600 59,727 Direct -14.34% Disposed 161.9% (price as of 2026-10-05)
May 2, 2012 ZD S 10b5-1 10,000 $25.69 $256,900 52,553 Direct -15.99% Disposed 149.4% (price as of 2026-10-05)
April 18, 2012 ZD S 10b5-1 10,000 $25.86 $258,600 52,553 Direct -15.99% Disposed 147.7% (price as of 2026-10-05)
April 4, 2012 ZD S 10b5-1 10,000 $27.42 $274,200 52,553 Direct -15.99% Disposed 133.6% (price as of 2026-10-05)
Dec. 5, 2011 ZD S 10b5-1 10,000 $27.26 $272,600 52,553 Direct -15.99% Disposed 135.0% (price as of 2026-10-05)
Nov. 3, 2011 ZD S 10b5-1 900 $29.62 $26,658 52,553 Direct -1.68% Disposed 116.3% (price as of 2026-10-05)
Nov. 3, 2011 ZD S 10b5-1 9,100 $28.68 $260,988 53,453 Direct -14.55% Disposed 123.4% (price as of 2026-10-05)
Oct. 5, 2011 ZD S 10b5-1 10,000 $27.51 $275,100 52,553 Direct -15.99% Disposed 132.9% (price as of 2026-10-05)
Sept. 6, 2011 ZD S 10b5-1 10,000 $30.06 $300,600 52,553 Direct -15.99% Disposed 113.1% (price as of 2026-10-05)
Aug. 3, 2011 ZD S 10b5-1 9,000 $30.32 $272,880 52,553 Direct -14.62% Disposed 111.3% (price as of 2026-10-05)
July 6, 2011 ZD S 10b5-1 8,000 $28.59 $228,720 52,553 Direct -13.21% Disposed 124.1% (price as of 2026-10-05)

Showing latest 100 of 182 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.

06
DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
May 7, 2020 ZD Restricted Stock Units Common Stock (2,531) $0.00 · 2,531 Acquired
Feb. 19, 2020 ZD Options to Purchase Common Stock Common Stock $0.01 par value (18,281) $22.92 May 6, 2020 18,281 Disposed
Feb. 19, 2019 ZD Options to Purchase Common Stock Common Stock $0.01 par value (16,680) $21.67 May 7, 2019 16,680 Disposed
April 18, 2018 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (12,779) $20.91 May 5, 2018 12,779 Disposed
April 11, 2018 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (10,000) $20.91 May 5, 2018 10,000 Disposed
May 10, 2017 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (9,000) $32.45 Aug. 3, 2017 9,000 Disposed
Aug. 27, 2015 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (15,000) $18.76 Aug. 31, 2015 15,000 Disposed
Aug. 20, 2015 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (15,000) $18.76 Aug. 31, 2015 15,000 Disposed
Aug. 13, 2015 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (15,000) $18.76 Aug. 31, 2015 15,000 Disposed
Aug. 6, 2015 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (15,000) $18.76 Aug. 31, 2015 15,000 Disposed
March 19, 2014 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (20,000) $9.54 March 24, 2014 20,000 Disposed
March 12, 2014 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (20,000) $9.54 March 24, 2014 20,000 Disposed
March 5, 2014 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (20,000) $9.54 March 24, 2014 20,000 Disposed
Feb. 26, 2014 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (20,000) $9.54 March 24, 2014 20,000 Disposed
Feb. 19, 2014 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (20,000) $9.54 March 24, 2014 20,000 Disposed
May 30, 2012 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (10,000) $4.47 June 25, 2012 10,000 Disposed
May 16, 2012 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (10,000) $4.47 June 25, 2012 10,000 Disposed
May 2, 2012 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (5,000) $4.47 June 25, 2012 5,000 Disposed
May 2, 2012 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (5,000) $3.52 June 25, 2012 5,000 Disposed
April 18, 2012 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (10,000) $3.52 June 25, 2012 10,000 Disposed
April 4, 2012 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (10,000) $3.52 June 25, 2012 10,000 Disposed
Dec. 5, 2011 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (10,000) $1.17 Dec. 28, 2011 10,000 Disposed
Nov. 3, 2011 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (2,500) $1.17 Dec. 28, 2011 2,500 Disposed
Nov. 3, 2011 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (7,500) $0.94 Dec. 28, 2011 7,500 Disposed
Oct. 5, 2011 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (10,000) $0.94 Dec. 28, 2011 10,000 Disposed
Sept. 6, 2011 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (10,000) $0.94 Dec. 28, 2011 10,000 Disposed
Aug. 3, 2011 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (9,000) $0.94 Dec. 28, 2011 9,000 Disposed
July 6, 2011 ZD Option to Purchase Common Stock Common Stock, $0.01 par value (8,000) $0.94 Dec. 28, 2011 8,000 Acquired
June 3, 2011 ZD Option to Purchase Common Stock Common Stock, $0.01 par value (7,000) $0.94 Dec. 28, 2011 7,000 Acquired
May 12, 2011 ZD Option to purchase Common Stock Common Stock, $0.01 par value (15,117) $29.34 May 12, 2021 15,117 Acquired
May 6, 2011 ZD Option to Purchase Common Stock Common Stock, $0.01 par value (6,000) $0.94 Dec. 28, 2011 6,000 Acquired
April 5, 2011 ZD Option to Purchase Common Stock Common Stock, $0.01 par value (5,000) $0.94 Dec. 28, 2011 5,000 Acquired
March 23, 2011 ZD Option to Purchase Common Stock Common Stock, $0.01 par value (5,000) $0.94 Dec. 28, 2011 5,000 Acquired
Feb. 17, 2011 ZD Option to Purchase Common Stock Common Stock, $0.01 par value (10,000) $1.03 Dec. 28, 2011 10,000 Acquired
May 6, 2010 ZD Option to purchase Common Stock Common Stock, $0.01 par value (18,281) $22.92 May 6, 2020 18,281 Acquired
May 7, 2009 ZD Option to purchase Common Stock Common Stock, $0.01 par value (16,680) $21.67 May 7, 2019 16,680 Acquired
Aug. 28, 2008 ZD Option to Purchase Common Stock Common Stock, $0.01 par value (50,000) $1.72 July 12, 2010 50,000 Acquired
May 5, 2008 ZD Option to purchase Common Stock Common Stock, $0.01 par value (22,779) $20.91 May 5, 2018 22,779 Acquired
Aug. 3, 2007 ZD Option to purchase Common Stock Common Stock, $0.01 par value (9,000) $32.45 Aug. 3, 2017 9,000 Acquired
Dec. 22, 2006 ZD Option to purchase Common Stock [F2] Common Stock (12,500) $4.47 June 28, 2012 12,500 Acquired
Dec. 22, 2006 ZD Option to purchase Common Stock [F2] Common Stock (12,500) $3.52 June 25, 2012 12,500 Disposed
Dec. 22, 2006 ZD Option to purchase Common Stock [F2] Common Stock (12,500) $4.47 June 25, 2012 12,500 Acquired
Dec. 22, 2006 ZD Option to purchase Common Stock [F2] Common Stock (12,500) $3.52 June 25, 2012 12,500 Disposed
Dec. 22, 2006 ZD Option to purchase Common Stock [F2] Common Stock (12,500) $1.17 Dec. 28, 2011 12,500 Acquired
Dec. 22, 2006 ZD Option to purchase Common Stock [F2] Common Stock (12,500) $0.94 Dec. 28, 2011 12,500 Disposed
Dec. 22, 2006 ZD Option to purchase Common Stock [F2] Common Stock (10,000) $1.03 Dec. 28, 2011 10,000 Acquired
Dec. 22, 2006 ZD Option to purchase Common Stock [F2] Common Stock (10,000) $0.94 Dec. 28, 2011 10,000 Disposed
Dec. 22, 2006 ZD Option to purchase Common Stock Common Stock (50,000) $4.47 June 28, 2012 50,000 Acquired
Dec. 22, 2006 ZD Option to purchase Common Stock Common Stock (50,000) $3.52 June 25, 2012 50,000 Disposed
Dec. 22, 2006 ZD Option to purchase Common Stock Common Stock (12,500) $4.47 June 25, 2012 12,500 Acquired
Dec. 22, 2006 ZD Option to purchase Common Stock Common Stock (12,500) $3.52 June 25, 2012 12,500 Disposed
Dec. 22, 2006 ZD Option to purchase Common Stock Common Stock (12,500) $1.17 Dec. 28, 2011 12,500 Acquired
Dec. 22, 2006 ZD Option to purchase Common Stock Common Stock (12,500) $0.94 Dec. 28, 2011 12,500 Disposed
Dec. 22, 2006 ZD Option to purchase Common Stock Common Stock (10,000) $1.03 Dec. 28, 2011 10,000 Acquired
Dec. 22, 2006 ZD Option to purchase Common Stock Common Stock (10,000) $0.94 Dec. 28, 2011 10,000 Disposed
Aug. 31, 2005 ZD Options to purchase Common Stock [F3] Common Stock, $0.01 par value (6,000) $37.53 Aug. 31, 2015 6,000 Acquired
Aug. 31, 2005 ZD Options to purchase Common Stock [F3] Common Stock, $0.01 par value (6,000) $37.53 Aug. 31, 2015 6,000 Acquired
Aug. 31, 2005 ZD Options to purchase Common Stock [F3] Common Stock, $0.01 par value (6,000) $37.53 Aug. 31, 2015 6,000 Acquired
Aug. 31, 2005 ZD Options to purchase Common Stock [F3] Common Stock, $0.01 par value (6,000) $37.53 Aug. 31, 2015 6,000 Acquired
Aug. 31, 2005 ZD Options to purchase Common Stock [F3] Common Stock, $0.01 par value (6,000) $37.53 Aug. 31, 2015 6,000 Acquired
March 24, 2004 ZD Option to purchase Common Stock Common Stock, $0.01 par value (12,500) $19.09 March 24, 2014 12,500 Acquired
March 24, 2004 ZD Option to purchase Common Stock Common Stock, $0.01 par value (12,500) $19.09 March 24, 2014 12,500 Acquired
March 24, 2004 ZD Option to purchase Common Stock Common Stock, $0.01 par value (12,500) $19.09 March 24, 2014 12,500 Acquired
March 24, 2004 ZD Option to purchase Common Stock Common Stock, $0.01 par value (12,500) $19.09 March 24, 2014 12,500 Acquired

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

Initial ownership (Form 3) 2 holdings

07

Securities held when first becoming an insider, per SEC Form 3.

DateTickerSecuritySharesOwnership
May 23, 2019 OCCIM Common Stock 0 Direct
Nov. 7, 2012 OFSSO Common Stock 0 Direct