Michael Schulhof

CIK 1198461 · View on SEC EDGAR ↗

Insider

First SEC filing: Feb. 18, 2004 · Latest: Feb. 18, 2004

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Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 40 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

40 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
Feb. 14, 2014 ZD S 3,024 $50.02 $151,260 24,855 Direct -10.85% Disposed 28.3% (price as of 2026-08-19)
May 14, 2013 ZD S 1,021 $39.99 $40,830 24,855 Direct -3.95% Disposed 60.5% (price as of 2026-08-19)
May 14, 2013 ZD S 1,021 $39.99 $40,830 1,284 Direct -44.30% Disposed 60.5% (price as of 2026-08-19)
May 10, 2013 ZD S 4,029 $39.89 $160,717 25,876 Direct -13.47% Disposed 60.9% (price as of 2026-08-19)
May 10, 2013 ZD S 19,542 $39.63 $774,449 29,905 Direct -39.52% Disposed 61.9% (price as of 2026-08-19)
May 10, 2013 ZD S 4,029 $39.89 $160,717 2,305 Direct -63.61% Disposed 60.9% (price as of 2026-08-19)
May 10, 2013 ZD S 19,542 $39.63 $774,449 6,334 Direct -75.52% Disposed 61.9% (price as of 2026-08-19)
May 9, 2013 ZD S 12,663 $38.48 $487,272 25,876 Direct -32.86% Disposed 66.8% (price as of 2026-08-19)
Aug. 3, 2012 ZD S 900 $29.70 $26,730 34,233 Direct -2.56% Disposed 116.1% (price as of 2026-08-19)
Aug. 2, 2012 ZD S 16,580 $29.42 $487,784 35,133 Direct -32.06% Disposed 118.1% (price as of 2026-08-19)
Feb. 16, 2012 ZD S 11,549 $30.20 $348,780 32,991 Direct -25.93% Disposed 112.5% (price as of 2026-08-19)
Nov. 3, 2011 ZD S 5,000 $29.98 $149,900 32,991 Direct -13.16% Disposed 114.1% (price as of 2026-08-19)
Aug. 5, 2011 ZD S 3,962 $30.20 $119,652 37,991 Direct -9.44% Disposed 112.5% (price as of 2026-08-19)
Dec. 7, 2010 ZD S 31,892 $30.77 $981,317 35,137 Direct -47.58% Disposed 108.6% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 100 $21.35 $2,135 31,111 Direct -0.32% Disposed 200.6% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 200 $21.39 $4,278 30,311 Direct -0.66% Disposed 200.0% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 200 $21.42 $4,284 30,111 Direct -0.66% Disposed 199.6% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 300 $21.43 $6,429 29,811 Direct -1.00% Disposed 199.5% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 300 $21.44 $6,432 29,511 Direct -1.01% Disposed 199.3% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 400 $21.80 $8,720 26,411 Direct -1.49% Disposed 194.4% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 100 $21.78 $2,178 26,811 Direct -0.37% Disposed 194.7% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 100 $21.71 $2,171 26,911 Direct -0.37% Disposed 195.6% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 100 $21.66 $2,166 27,011 Direct -0.37% Disposed 196.3% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 200 $21.62 $4,324 27,111 Direct -0.73% Disposed 196.8% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 100 $21.60 $2,160 27,311 Direct -0.36% Disposed 197.1% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 100 $21.56 $2,156 27,411 Direct -0.36% Disposed 197.7% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 600 $21.55 $12,930 27,511 Direct -2.13% Disposed 197.8% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 100 $21.54 $2,154 28,111 Direct -0.35% Disposed 197.9% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 200 $21.53 $4,306 28,211 Direct -0.70% Disposed 198.1% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 200 $21.50 $4,300 28,411 Direct -0.70% Disposed 198.5% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 300 $21.49 $6,447 28,611 Direct -1.04% Disposed 198.6% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 100 $21.47 $2,147 28,911 Direct -0.34% Disposed 198.9% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 100 $21.46 $2,146 29,011 Direct -0.34% Disposed 199.0% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 300 $21.45 $6,435 29,111 Direct -1.02% Disposed 199.2% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 100 $21.44 $2,144 29,411 Direct -0.34% Disposed 199.3% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 300 $21.37 $6,411 30,511 Direct -0.97% Disposed 200.3% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 300 $21.36 $6,408 30,811 Direct -0.96% Disposed 200.4% (price as of 2026-08-19)
Aug. 31, 2009 ZD S 200 $21.32 $4,264 31,211 Direct -0.64% Disposed 201.0% (price as of 2026-08-19)
Aug. 6, 2009 ZD S 200 $23.71 $4,742 65,522 Direct -0.30% Disposed 170.7% (price as of 2026-08-19)
Aug. 6, 2009 ZD S 1,900 $23.72 $45,068 63,622 Direct -2.90% Disposed 170.6% (price as of 2026-08-19)
Aug. 6, 2009 ZD S 2,055 $23.73 $48,765 61,567 Direct -3.23% Disposed 170.4% (price as of 2026-08-19)
Aug. 6, 2009 ZD S 200 $24.17 $4,834 51,725 Direct -0.39% Disposed 165.5% (price as of 2026-08-19)
Aug. 6, 2009 ZD S 100 $24.11 $2,411 51,925 Direct -0.19% Disposed 166.2% (price as of 2026-08-19)
Aug. 6, 2009 ZD S 2,742 $24.10 $66,082 52,025 Direct -5.01% Disposed 166.3% (price as of 2026-08-19)
Aug. 6, 2009 ZD S 1,600 $24.09 $38,544 54,767 Direct -2.84% Disposed 166.4% (price as of 2026-08-19)
Aug. 6, 2009 ZD S 1,482 $24.05 $35,642 56,367 Direct -2.56% Disposed 166.8% (price as of 2026-08-19)
Aug. 6, 2009 ZD S 200 $24.04 $4,808 57,849 Direct -0.34% Disposed 167.0% (price as of 2026-08-19)
Aug. 6, 2009 ZD S 1,800 $23.98 $43,164 58,049 Direct -3.01% Disposed 167.6% (price as of 2026-08-19)
Aug. 6, 2009 ZD S 200 $23.97 $4,794 59,849 Direct -0.33% Disposed 167.7% (price as of 2026-08-19)
Aug. 6, 2009 ZD S 300 $23.95 $7,185 60,049 Direct -0.50% Disposed 168.0% (price as of 2026-08-19)
Aug. 6, 2009 ZD S 18 $23.94 $431 60,349 Direct -0.03% Disposed 168.1% (price as of 2026-08-19)
Aug. 6, 2009 ZD S 100 $23.79 $2,379 60,367 Direct -0.17% Disposed 169.8% (price as of 2026-08-19)
Aug. 6, 2009 ZD S 500 $23.75 $11,875 60,467 Direct -0.82% Disposed 170.2% (price as of 2026-08-19)
Aug. 6, 2009 ZD S 600 $23.74 $14,244 60,967 Direct -0.97% Disposed 170.3% (price as of 2026-08-19)
Aug. 6, 2009 ZD S 200 $23.70 $4,740 65,722 Direct -0.30% Disposed 170.8% (price as of 2026-08-19)
Aug. 6, 2009 ZD S 145 $23.69 $3,435 65,922 Direct -0.22% Disposed 170.9% (price as of 2026-08-19)
Aug. 6, 2009 ZD S 400 $23.66 $9,464 66,067 Direct -0.60% Disposed 171.2% (price as of 2026-08-19)
Aug. 6, 2009 ZD S 100 $23.65 $2,365 66,467 Direct -0.15% Disposed 171.4% (price as of 2026-08-19)
Aug. 6, 2009 ZD S 200 $23.64 $4,728 66,567 Direct -0.30% Disposed 171.5% (price as of 2026-08-19)
Aug. 6, 2009 ZD S 100 $23.63 $2,363 66,767 Direct -0.15% Disposed 171.6% (price as of 2026-08-19)

Showing latest 100 of 262 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
Feb. 14, 2014 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (3,024) $29.34 May 12, 2021 3,024 Disposed
May 10, 2013 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (3) $29.34 May 12, 2021 3,024 Disposed
May 10, 2013 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (3,656) $22.92 May 6, 2020 3,656 Disposed
May 10, 2013 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (3,336) $21.67 May 7, 2019 3,336 Disposed
May 10, 2013 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (4,555) $20.91 May 5, 2018 4,555 Disposed
May 10, 2013 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (9,000) $32.45 Aug. 3, 2017 9,000 Disposed
Aug. 2, 2012 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (3,336) $21.67 May 7, 2019 3,336 Disposed
Aug. 2, 2012 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (3,656) $22.92 May 6, 2020 3,656 Disposed
Aug. 2, 2012 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (4,556) $20.91 May 5, 2018 4,556 Disposed
Feb. 16, 2012 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (3,336) $21.67 May 7, 2019 3,336 Disposed
Feb. 16, 2012 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (3,657) $22.92 May 6, 2020 3,657 Disposed
Feb. 16, 2012 ZD Options to Purchase Common Stock Common Stock $0.01 Par Value (4,556) $20.91 May 5, 2018 4,556 Disposed
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
Dec. 7, 2010 ZD Option to Purchase Common Stock Common Stock, $0.01 par value (3,336) $21.67 May 7, 2019 3,336 Disposed
Dec. 7, 2010 ZD Option to Purchase Common Stock Common Stock, $0.01 par value (24,000) $18.76 Aug. 31, 2015 24,000 Disposed
Dec. 7, 2010 ZD Option to Purchase Common Stock Common Stock, $0.01 par value (4,556) $20.91 May 5, 2018 4,556 Disposed
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
Aug. 6, 2009 ZD Option to Purchase Common Stock Common Stock, $0.01 par value (12,000) $18.76 Aug. 31, 2015 12,000 Disposed
Aug. 6, 2009 ZD Option to Purchase Common Stock Common Stock, $0.01 par value (25,000) $9.54 March 24, 2014 25,000 Disposed
Aug. 6, 2009 ZD Option to Purchase Common Stock Common Stock, $0.01 par value (4,556) $20.91 May 5, 2018 4,556 Disposed
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
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
Nov. 21, 2007 ZD Option to purchase Common Stock Common Stock, $0.01 par value (24,000) $18.76 Aug. 31, 2015 24,000 Acquired
Nov. 21, 2007 ZD Options to purchase Common Stock Common Stock, $0.01 par value (25,000) $9.54 March 24, 2014 25,000 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
March 14, 2007 ZD Option to purchase Common Stock Common Stock, $0.01 par value (25,000) $4.47 June 25, 2012 25,000 Disposed
March 14, 2007 ZD Option to purchase Common Stock Common Stock, $0.01 par value (50,000) $9.54 March 24, 2014 50,000 Disposed
March 14, 2007 ZD Option to purchase Common Stock Common Stock, $0.01 par value (25,000) $3.52 June 25, 2012 25,000 Disposed
March 13, 2007 ZD Option to purchase Common Stock Common Stock, $0.01 par value (12,500) $1.17 Dec. 28, 2011 12,500 Disposed
March 13, 2007 ZD Option to purchase Common Stock Common Stock, $0.01 par value (10,000) $1.03 Dec. 28, 2011 10,000 Disposed
March 13, 2007 ZD Option to purchase Common Stock Common Stock, $0.01 par value (25,000) $0.94 Dec. 28, 2011 25,000 Disposed
March 13, 2007 ZD Option to purchase Common Stock Common Stock, $0.01 par value (20,000) $0.94 Dec. 28, 2011 20,000 Disposed
March 13, 2007 ZD Option to purchase Common Stock Common Stock, $0.01 par value (25,000) $1.72 July 12, 2010 25,000 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) $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).