David T Riddiford

CIK 1111768 · View on SEC EDGAR ↗

Insider

First SEC filing: Nov. 29, 2016 · Latest: Nov. 29, 2016

On this page

Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 48 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

48 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
Nov. 29, 2016 VICR S 2,055 $14.97 $30,763 86,972 Direct -2.31% Disposed 1297.5% (price as of 2026-08-21)
Nov. 23, 2016 VICR S 7,945 $14.79 $117,507 89,027 Direct -8.19% Disposed 1314.5% (price as of 2026-08-21)
March 8, 2011 VICR S 3,624 $15.40 $55,810 96,972 Direct -3.60% Disposed 1258.4% (price as of 2026-08-21)
Nov. 2, 2010 VICR S 5,000 $17.60 $88,000 96,972 Direct -4.90% Disposed 1088.6% (price as of 2026-08-21)
June 6, 2008 VICR S 1,953 $11.00 $21,483 102,472 Direct -1.87% Disposed 1801.8% (price as of 2026-08-21)
June 6, 2008 VICR S 2,619 $11.00 $28,809 104,425 Direct -2.45% Disposed 1801.8% (price as of 2026-08-21)
May 31, 2007 VICR S 1,953 $11.89 $23,221 98,972 Direct -1.94% Disposed 1659.5% (price as of 2026-08-21)
May 31, 2007 VICR S 2,619 $11.89 $31,140 100,925 Direct -2.53% Disposed 1659.5% (price as of 2026-08-21)
April 19, 2005 VICR S 5,239 $12.12 $63,497 91,200 Direct -5.43% Disposed 1626.1% (price as of 2026-08-21)
March 16, 2004 VICR S 2,000 $14.64 $29,280 91,200 Direct -2.15% Disposed 1329.0% (price as of 2026-08-21)

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
June 17, 2016 VICR Non Qualified Stock Option Common Stock (4,713) $10.61 June 17, 2026 4,713 Acquired
June 19, 2015 VICR Non Qualified Stock Option Common Stock (3,726) $13.42 June 19, 2025 3,726 Acquired
June 20, 2014 VICR Non Qualified Stock Option Common Stock (6,212) $8.05 June 20, 2024 6,212 Acquired
June 21, 2013 VICR Non Qualified Stock Option Common Stock (8,819) $5.67 June 21, 2023 8,819 Acquired
June 17, 2013 VICR Non Qualified Stock Option Common Stock (4,274) $11.70 June 24, 2013 4,274 Disposed
June 17, 2013 VICR Non Qualified Stock Option Common Stock (3,197) $15.64 June 23, 2014 3,197 Disposed
June 17, 2013 VICR Non Qualified Stock Option Common Stock (8,224) $6.08 June 21, 2015 8,224 Disposed
June 17, 2013 VICR Non Qualified Stock Option Common Stock (4,274) $6.29 June 17, 2023 4,274 Acquired
June 17, 2013 VICR Non Qualified Stock Option Common Stock (3,197) $6.29 June 17, 2023 3,197 Acquired
June 17, 2013 VICR Non Qualified Stock Option Common Stock (8,224) $6.29 June 17, 2023 8,224 Acquired
June 21, 2012 VICR Non Qualified Stock Option Common Stock (8,224) $6.08 June 21, 2015 8,224 Acquired
June 23, 2011 VICR Non Qualified Stock Option Common Stock (3,197) $15.64 June 23, 2014 3,197 Acquired
March 8, 2011 VICR Non Qualified Stock Option Common Stock (3,624) $6.90 June 25, 2012 3,624 Disposed
Nov. 2, 2010 VICR Non Qualified Stock Option Common Stock (5,000) $10.00 June 26, 2011 5,000 Disposed
June 24, 2010 VICR Non Qualified Stock Option Common Stock (4,274) $11.70 June 24, 2013 4,274 Acquired
June 25, 2009 VICR Non Qualified Stock Option Common Stock (7,247) $6.90 June 25, 2012 7,247 Acquired
June 26, 2008 VICR Non Qualified Stock Option Common Stock (5,000) $10.00 June 26, 2011 5,000 Acquired
June 6, 2008 VICR Non Qualified Stock option Common Stock (1,952) $9.59 — 1,953 Disposed
June 6, 2008 VICR Non Qualified Stock option Common Stock (2,619) $7.15 — 2,619 Disposed
June 20, 2007 VICR Non Qualified Stock Option Common Stock (4,026) $12.42 June 20, 2010 4,026 Acquired
May 31, 2007 VICR Non Qualified Stock Option Common Stock (1,953) $9.59 — 1,953 Disposed
May 31, 2007 VICR Non Qualified Stock Option Common Stock (2,619) $7.15 — 2,619 Disposed
June 22, 2006 VICR Non Qualified Stock Option Common Stock (3,180) $15.73 June 22, 2009 3,180 Acquired
May 4, 2006 VICR Non Qualified Stock Option Common Stock (3,906) $9.59 — 3,906 Disposed
May 4, 2006 VICR Non Qualified Stock Option Common Stock (2,619) $7.15 — 2,619 Disposed
May 4, 2006 VICR Non Qualified Stock Option Common Stock (1,247) $16.04 — 1,247 Disposed
May 4, 2006 VICR Non Qualified Stock Option Common Stock (2,000) $18.00 June 27, 2006 2,000 Disposed
June 23, 2005 VICR Non-Qualified Stock Option Common Stock (3,585) $13.95 June 23, 2008 3,585 Acquired
April 19, 2005 VICR Non-Qualified Stock Option Common Stock (5,239) $7.15 — 5,239 Disposed
June 17, 2004 VICR Non-Qualified Stock Option (right to buy) Common Stock (3,330) $15.02 June 17, 2007 3,330 Acquired
April 29, 2004 VICR Non-Qualified Stock Option (right to buy) Common Stock (2,000) $11.25 June 16, 2004 2,000 Disposed
June 26, 2003 VICR Non-Qualified Stock Option Common Stock $9.59 July 26, 2009 9,764 Acquired

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