William R Walker
CIK 1231402 · View on SEC EDGAR ↗
Insider
First SEC filing: Nov. 4, 2003 · Latest: Nov. 4, 2003
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 15 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
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| May 17, 2011 | DAIO | A | 12,500 | $6.02 | $75,250 | 68,000 Direct | +22.52% | Acquired | -50.3% (price as of 2026-08-19) |
| April 26, 2011 | DAIO | X | 7,500 | $6.14 | $46,050 | 30,000 Direct | +33.33% | Acquired | -51.3% (price as of 2026-08-19) |
| April 26, 2011 | DAIO | M | 7,500 | $2.56 | $19,200 | 55,500 Direct | -11.90% | Disposed | 16.8% (price as of 2026-08-19) |
| May 11, 2010 | DAIO | A | 12,500 | $4.30 | $53,750 | 63,000 Direct | +24.75% | Acquired | -30.5% (price as of 2026-08-19) |
| May 3, 2010 | DAIO | M | 7,500 | $2.70 | $20,250 | 22,500 Direct | +50.00% | Acquired | 10.7% (price as of 2026-08-19) |
| May 3, 2010 | DAIO | M | 7,500 | $2.70 | $20,250 | 50,500 Direct | -12.93% | Disposed | 10.7% (price as of 2026-08-19) |
| Oct. 22, 2009 | DAIO | M | 15,000 | $3.12 | $46,800 | 58,000 Direct | -20.55% | Disposed | -4.2% (price as of 2026-08-19) |
| Oct. 22, 2009 | DAIO | M | 15,000 | $3.12 | $46,800 | 15,000 Direct | — | Acquired | -4.2% (price as of 2026-08-19) |
| May 14, 2009 | DAIO | A | 9,000 | — | — | 73,000 Direct | +14.06% | Acquired | (price as of 2026-08-19) |
| May 19, 2008 | DAIO | A | 9,000 | — | — | 64,000 Direct | +16.36% | Acquired | (price as of 2026-08-19) |
| May 17, 2007 | DAIO | A | 12,500 | $3.68 | $46,000 | 55,000 Direct | +29.41% | Acquired | -18.7% (price as of 2026-08-19) |
| May 24, 2006 | DAIO | A | 12,500 | $3.88 | $48,500 | 42,500 Direct | +41.67% | Acquired | -22.9% (price as of 2026-08-19) |
| May 19, 2005 | DAIO | A | 7,500 | $2.56 | $19,200 | 30,000 Direct | +33.33% | Acquired | 16.8% (price as of 2026-08-19) |
| May 20, 2004 | DAIO | A | 7,500 | $2.70 | $20,250 | 22,500 Direct | +50.00% | Acquired | 10.7% (price as of 2026-08-19) |
| Oct. 31, 2003 | DAIO | A | 15,000 | $3.12 | $46,800 | 15,000 Direct | — | Acquired | -4.2% (price as of 2026-08-19) |
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 17, 2011 | DAIO | Non-Qualified Option | Non-Qualified Option (12,500) | $6.02 | May 17, 2017 | 12,500 | Acquired |
| April 26, 2011 | DAIO | Non-Qualified Option (right to buy) | Non-Qualified Option (right to buy) (7,500) | $2.56 | May 19, 2011 | 7,500 | Disposed |
| May 11, 2010 | DAIO | Non-Qualified Option | Non-Qualified Option (12,500) | $4.30 | May 11, 2016 | 12,500 | Acquired |
| May 3, 2010 | DAIO | Non-Qualified Option | Non-Qualified Option (7,500) | $2.70 | May 20, 2010 | 7,500 | Disposed |
| Oct. 22, 2009 | DAIO | Non-Qualified Option | Non-Qualified Option (15,000) | $3.12 | Oct. 31, 2009 | 15,000 | Disposed |
| May 14, 2009 | DAIO | Non-Qualified Stock Option (right to buy) | Non-Qualified Stock Option (right to buy) (9,000) | $3.06 | May 14, 2015 | 9,000 | Acquired |
| May 19, 2008 | DAIO | Non-Qualified Stock Option (right to buy) | Non-Qualified Stock Option (right to buy) (9,000) | $5.98 | May 19, 2014 | 9,000 | Acquired |
| May 17, 2007 | DAIO | Non-Qualified Stock Option (right to buy) | Non-Qualified Stock Option (right to buy) (12,500) | $3.68 | May 17, 2013 | 12,500 | Acquired |
| May 24, 2006 | DAIO | Non-Qualified Stock Option (right to buy) | Non-Qualified Stock Option (right to buy) (12,500) | $3.88 | May 24, 2012 | 12,500 | Acquired |
| May 19, 2005 | DAIO | Non-Qualified Stock Option (right to buy) | Non-Qualified Stock Option (right to buy) (7,500) | $2.56 | May 19, 2011 | 7,500 | Acquired |
| May 20, 2004 | DAIO | Non-Qualified Stock Option (right to buy) | Non-Qualified Stock Option (right to buy) (7,500) | $2.70 | May 20, 2010 | 7,500 | Acquired |
| Oct. 31, 2003 | DAIO | Non-Qualified Stock Option (Right to Buy) | Common Stock (15,000) | $3.12 | Oct. 31, 2009 | 15,000 | 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. 4, 2003 | DAIO | Common Stock | 0 | Direct |