William D Clark
Insider
First SEC filing: June 11, 2026 · Latest: June 11, 2026
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| June 9, 2026 | ALDX | A | 2,323 | · | · | 2,323 Direct | · | Acquired | (price as of 2026-10-02) |
| June 9, 2026 | ALDX | A | 70,000 | · | · | 70,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Nov. 20, 2025 | IBIO | A | 13,500 | · | · | 13,500 Direct | · | Acquired | (price as of 2026-10-02) |
| April 17, 2025 | ALDX | A | 76,760 | · | · | 76,760 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 10, 2025 | IBIO | P | 1,838 | $2.72 | $4,999 | 1,838 Direct | · | Acquired | -58.6% (price as of 2026-10-02) |
| Nov. 21, 2024 | IBIO | A | 18,900 | · | · | 18,900 Direct | · | Acquired | (price as of 2026-10-02) |
| Dec. 9, 2021 | IBIO | A | 109,000 | · | · | 109,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Aug. 23, 2021 | IBIO | A | 100,000 | · | · | 100,000 Direct | · | Acquired | (price as of 2026-10-02) |
| June 5, 2018 | XFOR | A | 10,000 | · | · | 10,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Nov. 15, 2017 | XFOR | A | 25,000 | · | · | 25,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Nov. 15, 2017 | XFOR | A | 7,324 | · | · | 7,324 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 19, 2010 | VNDA | S | 9,522 | $10.65 | $101,409 | 168,279 Direct | -5.36% | Disposed | -56.5% (price as of 2026-10-02) |
| Feb. 18, 2010 | VNDA | M | 25,000 | · | · | 177,801 Direct | +16.36% | Acquired | (price as of 2026-10-02) |
| Feb. 18, 2010 | VNDA | M | 25,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Jan. 1, 2010 | VNDA | A | 30,000 | · | · | 30,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Dec. 17, 2009 | VNDA | A | 70,000 | · | · | 70,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Dec. 14, 2009 | VNDA | M | 147,775 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Dec. 14, 2009 | VNDA | M | 57,766 | · | · | 147,775 Direct | -28.10% | Disposed | (price as of 2026-10-02) |
| Dec. 14, 2009 | VNDA | M | 45,141 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Dec. 14, 2009 | VNDA | M | 8,424 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Dec. 14, 2009 | VNDA | M | 36,444 | · | · | 8,424 Direct | -81.22% | Disposed | (price as of 2026-10-02) |
| Dec. 14, 2009 | VNDA | S | 217,749 | $11.05 | $2,406,126 | 152,801 Direct | -58.76% | Disposed | -58.1% (price as of 2026-10-02) |
| Dec. 14, 2009 | VNDA | M | 147,775 | $0.33 | $48,766 | 370,550 Direct | +66.33% | Acquired | 1303.0% (price as of 2026-10-02) |
| Dec. 14, 2009 | VNDA | M | 57,766 | $0.33 | $19,063 | 222,775 Direct | +35.01% | Acquired | 1303.0% (price as of 2026-10-02) |
| Dec. 14, 2009 | VNDA | M | 45,141 | $0.33 | $14,897 | 165,009 Direct | +37.66% | Acquired | 1303.0% (price as of 2026-10-02) |
| Dec. 14, 2009 | VNDA | M | 8,424 | $0.33 | $2,780 | 119,868 Direct | +7.56% | Acquired | 1303.0% (price as of 2026-10-02) |
| Dec. 14, 2009 | VNDA | M | 36,444 | $0.33 | $12,027 | 111,444 Direct | +48.59% | Acquired | 1303.0% (price as of 2026-10-02) |
| May 22, 2009 | VNDA | A | 75,000 | · | · | 75,000 Direct | · | Acquired | (price as of 2026-10-02) |
| May 11, 2009 | VNDA | M | 25,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 11, 2009 | VNDA | M | 25,000 | · | · | 75,000 Direct | +50.00% | Acquired | (price as of 2026-10-02) |
| May 6, 2009 | VNDA | A | 25,000 | · | · | 25,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Dec. 16, 2008 | VNDA | A | 50,000 | · | · | 100,000 Direct | +100.00% | Acquired | (price as of 2026-10-02) |
| Aug. 7, 2008 | VNDA | P | 50,000 | $0.99 | $49,500 | 50,000 Direct | · | Acquired | 367.7% (price as of 2026-10-02) |
| Jan. 4, 2008 | VNDA | A | 120,000 | · | · | 120,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 1, 2007 | VNDA | M | 3,200 | · | · | 44,868 Direct | -6.66% | Disposed | (price as of 2026-10-02) |
| Oct. 1, 2007 | VNDA | S 10b5-1 | 3,200 | $13.87 | $44,384 | 0 Direct | -100.00% | Disposed | -66.6% (price as of 2026-10-02) |
| Oct. 1, 2007 | VNDA | M | 3,200 | $0.33 | $1,056 | 3,200 Direct | · | Acquired | 1303.0% (price as of 2026-10-02) |
| June 1, 2007 | VNDA | M | 3,200 | · | · | 45,141 Direct | -6.62% | Disposed | (price as of 2026-10-02) |
| June 1, 2007 | VNDA | S 10b5-1 | 100 | $20.24 | $2,024 | 0 Direct | -100.00% | Disposed | -77.1% (price as of 2026-10-02) |
| June 1, 2007 | VNDA | S 10b5-1 | 174 | $20.23 | $3,520 | 100 Direct | -63.50% | Disposed | -77.1% (price as of 2026-10-02) |
| June 1, 2007 | VNDA | S 10b5-1 | 12 | $20.22 | $243 | 274 Direct | -4.20% | Disposed | -77.1% (price as of 2026-10-02) |
| June 1, 2007 | VNDA | S 10b5-1 | 100 | $20.21 | $2,021 | 286 Direct | -25.91% | Disposed | -77.1% (price as of 2026-10-02) |
| June 1, 2007 | VNDA | S 10b5-1 | 100 | $20.19 | $2,019 | 386 Direct | -20.58% | Disposed | -77.1% (price as of 2026-10-02) |
| June 1, 2007 | VNDA | S 10b5-1 | 100 | $20.17 | $2,017 | 486 Direct | -17.06% | Disposed | -77.0% (price as of 2026-10-02) |
| June 1, 2007 | VNDA | S 10b5-1 | 1,120 | $20.12 | $22,534 | 586 Direct | -65.65% | Disposed | -77.0% (price as of 2026-10-02) |
| June 1, 2007 | VNDA | S 10b5-1 | 100 | $20.11 | $2,011 | 1,706 Direct | -5.54% | Disposed | -77.0% (price as of 2026-10-02) |
| June 1, 2007 | VNDA | S 10b5-1 | 200 | $20.10 | $4,020 | 1,806 Direct | -9.97% | Disposed | -77.0% (price as of 2026-10-02) |
| June 1, 2007 | VNDA | S 10b5-1 | 500 | $20.07 | $10,035 | 2,006 Direct | -19.95% | Disposed | -76.9% (price as of 2026-10-02) |
| June 1, 2007 | VNDA | S 10b5-1 | 200 | $20.05 | $4,010 | 2,506 Direct | -7.39% | Disposed | -76.9% (price as of 2026-10-02) |
| June 1, 2007 | VNDA | S 10b5-1 | 200 | $20.05 | $4,010 | 2,706 Direct | -6.88% | Disposed | -76.9% (price as of 2026-10-02) |
| June 1, 2007 | VNDA | S 10b5-1 | 100 | $20.02 | $2,002 | 2,906 Direct | -3.33% | Disposed | -76.9% (price as of 2026-10-02) |
| June 1, 2007 | VNDA | S 10b5-1 | 194 | $20.01 | $3,882 | 3,006 Direct | -6.06% | Disposed | -76.9% (price as of 2026-10-02) |
| June 1, 2007 | VNDA | M | 3,200 | $0.33 | $1,056 | 3,200 Direct | · | Acquired | 1303.0% (price as of 2026-10-02) |
| April 2, 2007 | VNDA | M | 3,200 | · | · | 51,268 Direct | -5.88% | Disposed | (price as of 2026-10-02) |
| April 2, 2007 | VNDA | S 10b5-1 | 3,200 | $24.13 | $77,216 | 0 Direct | -100.00% | Disposed | -80.8% (price as of 2026-10-02) |
| April 2, 2007 | VNDA | M | 3,200 | $0.33 | $1,056 | 3,200 Direct | · | Acquired | 1303.0% (price as of 2026-10-02) |
| Feb. 1, 2007 | VNDA | M | 3,200 | · | · | 54,468 Direct | -5.55% | Disposed | (price as of 2026-10-02) |
| Feb. 1, 2007 | VNDA | S 10b5-1 | 599 | $29.42 | $17,623 | 0 Direct | -100.00% | Disposed | -84.3% (price as of 2026-10-02) |
| Feb. 1, 2007 | VNDA | S 10b5-1 | 901 | $29.50 | $26,580 | 599 Direct | -60.07% | Disposed | -84.3% (price as of 2026-10-02) |
| Feb. 1, 2007 | VNDA | S 10b5-1 | 100 | $29.43 | $2,943 | 1,500 Direct | -6.25% | Disposed | -84.3% (price as of 2026-10-02) |
| Feb. 1, 2007 | VNDA | S 10b5-1 | 200 | $29.50 | $5,900 | 1,600 Direct | -11.11% | Disposed | -84.3% (price as of 2026-10-02) |
| Feb. 1, 2007 | VNDA | S 10b5-1 | 100 | $29.48 | $2,948 | 1,800 Direct | -5.26% | Disposed | -84.3% (price as of 2026-10-02) |
| Feb. 1, 2007 | VNDA | S 10b5-1 | 100 | $29.44 | $2,944 | 1,900 Direct | -5.00% | Disposed | -84.3% (price as of 2026-10-02) |
| Feb. 1, 2007 | VNDA | S 10b5-1 | 500 | $29.52 | $14,760 | 2,000 Direct | -20.00% | Disposed | -84.3% (price as of 2026-10-02) |
| Feb. 1, 2007 | VNDA | S 10b5-1 | 100 | $29.56 | $2,956 | 2,500 Direct | -3.85% | Disposed | -84.3% (price as of 2026-10-02) |
| Feb. 1, 2007 | VNDA | S 10b5-1 | 100 | $29.65 | $2,965 | 2,600 Direct | -3.70% | Disposed | -84.4% (price as of 2026-10-02) |
| Feb. 1, 2007 | VNDA | S 10b5-1 | 100 | $29.80 | $2,980 | 2,700 Direct | -3.57% | Disposed | -84.5% (price as of 2026-10-02) |
| Feb. 1, 2007 | VNDA | S 10b5-1 | 100 | $29.63 | $2,963 | 2,800 Direct | -3.45% | Disposed | -84.4% (price as of 2026-10-02) |
| Feb. 1, 2007 | VNDA | S 10b5-1 | 100 | $29.68 | $2,968 | 2,900 Direct | -3.33% | Disposed | -84.4% (price as of 2026-10-02) |
| Feb. 1, 2007 | VNDA | S 10b5-1 | 100 | $29.67 | $2,967 | 3,000 Direct | -3.23% | Disposed | -84.4% (price as of 2026-10-02) |
| Feb. 1, 2007 | VNDA | S 10b5-1 | 100 | $29.54 | $2,954 | 3,100 Direct | -3.12% | Disposed | -84.3% (price as of 2026-10-02) |
| Feb. 1, 2007 | VNDA | M | 3,200 | $0.33 | $1,056 | 3,200 Direct | · | Acquired | 1303.0% (price as of 2026-10-02) |
| Jan. 30, 2007 | VNDA | A | 250,000 | · | · | 250,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Dec. 11, 2006 | VNDA | M | 15,000 | · | · | 57,668 Direct | -20.64% | Disposed | (price as of 2026-10-02) |
| Dec. 11, 2006 | VNDA | S | 15,000 | $26.28 | $394,200 | 0 Direct | -100.00% | Disposed | -82.4% (price as of 2026-10-02) |
| Dec. 11, 2006 | VNDA | M | 15,000 | $0.33 | $4,950 | 15,000 Direct | · | Acquired | 1303.0% (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | M | 18,600 | · | · | 72,668 Direct | -20.38% | Disposed | (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | S | 99 | $11.39 | $1,128 | 6,300 Direct | -1.55% | Disposed | -59.4% (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | S | 200 | $11.36 | $2,272 | 6,399 Direct | -3.03% | Disposed | -59.2% (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | S | 286 | $11.35 | $3,246 | 6,599 Direct | -4.15% | Disposed | -59.2% (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | S | 300 | $11.34 | $3,402 | 6,885 Direct | -4.18% | Disposed | -59.2% (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | S | 100 | $11.33 | $1,133 | 7,185 Direct | -1.37% | Disposed | -59.1% (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | S | 700 | $11.30 | $7,910 | 7,285 Direct | -8.77% | Disposed | -59.0% (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | S | 380 | $11.26 | $4,279 | 7,985 Direct | -4.54% | Disposed | -58.9% (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | S | 1,120 | $11.25 | $12,600 | 8,365 Direct | -11.81% | Disposed | -58.8% (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | S | 299 | $11.24 | $3,361 | 9,485 Direct | -3.06% | Disposed | -58.8% (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | S | 680 | $11.23 | $7,636 | 9,784 Direct | -6.50% | Disposed | -58.8% (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | S | 100 | $11.22 | $1,122 | 10,464 Direct | -0.95% | Disposed | -58.7% (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | S | 200 | $11.21 | $2,242 | 10,564 Direct | -1.86% | Disposed | -58.7% (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | S | 102 | $11.20 | $1,142 | 10,764 Direct | -0.94% | Disposed | -58.7% (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | S | 200 | $11.19 | $2,238 | 10,866 Direct | -1.81% | Disposed | -58.6% (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | S | 99 | $11.18 | $1,107 | 11,066 Direct | -0.89% | Disposed | -58.6% (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | S | 300 | $11.16 | $3,348 | 11,165 Direct | -2.62% | Disposed | -58.5% (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | S | 935 | $11.15 | $10,425 | 11,465 Direct | -7.54% | Disposed | -58.5% (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | S | 199 | $11.13 | $2,215 | 12,400 Direct | -1.58% | Disposed | -58.4% (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | S | 300 | $11.10 | $3,330 | 12,599 Direct | -2.33% | Disposed | -58.3% (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | S | 400 | $11.08 | $4,432 | 12,899 Direct | -3.01% | Disposed | -58.2% (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | S | 400 | $11.07 | $4,428 | 13,299 Direct | -2.92% | Disposed | -58.2% (price as of 2026-10-02) |
| Nov. 8, 2006 | VNDA | S | 700 | $11.05 | $7,735 | 13,699 Direct | -4.86% | Disposed | -58.1% (price as of 2026-10-02) |
| Nov. 7, 2006 | VNDA | M | 400 | · | · | 91,268 Direct | -0.44% | Disposed | (price as of 2026-10-02) |
Showing latest 100 of 111 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 |
|---|---|---|---|---|---|---|---|
| June 9, 2026 | ALDX | Stock Option (Right to Buy) | Common Stock | $1.72 | June 8, 2036 | 2,323 | Acquired |
| June 9, 2026 | ALDX | Stock Option (Right to Buy) | Common Stock | $1.72 | June 8, 2036 | 70,000 | Acquired |
| Nov. 20, 2025 | IBIO | Stock Option (right to buy) [F1] | Common Stock | $1.00 | Nov. 19, 2035 | 13,500 | Acquired |
| April 17, 2025 | ALDX | Stock Option (Right to Buy) | Common Stock | $2.19 | April 16, 2035 | 76,760 | Acquired |
| Nov. 21, 2024 | IBIO | Stock Option (right to buy) [F1] | Common Stock | $2.45 | Nov. 20, 2034 | 18,900 | Acquired |
| Dec. 9, 2021 | IBIO | Stock Option (right to buy) [F1] | Common Stock | $0.69 | Dec. 8, 2031 | 109,000 | Acquired |
| Aug. 23, 2021 | IBIO | Stock Option (right to buy) [F1] | Common Stock | $1.26 | Aug. 22, 2031 | 100,000 | Acquired |
| June 5, 2018 | XFOR | Stock Option (right to buy) | Common Stock | $16.99 | June 4, 2028 | 10,000 | Acquired |
| Nov. 15, 2017 | XFOR | Stock Option (right to buy) | Common Stock | $10.00 | Nov. 14, 2027 | 25,000 | Acquired |
| Nov. 15, 2017 | XFOR | Stock Option (right to buy) [F1] | Common Stock | $10.00 | Nov. 14, 2027 | 7,324 | Acquired |
| Feb. 18, 2010 | VNDA | Restricted Stock Units | Common Stock | · | · | 25,000 | Disposed |
| Jan. 1, 2010 | VNDA | Restricted Stock Units | Common Stock | · | · | 30,000 | Acquired |
| Dec. 17, 2009 | VNDA | Employee Stock Option (right to buy) | Common Stock | $10.65 | Dec. 16, 2019 | 70,000 | Acquired |
| Dec. 14, 2009 | VNDA | Employee Stock Option (right to buy) | Common Stock | $0.33 | Sept. 28, 2015 | 147,775 | Disposed |
| Dec. 14, 2009 | VNDA | Employee Stock Option (right to buy) | Common Stock | $0.33 | Sept. 28, 2015 | 57,766 | Disposed |
| Dec. 14, 2009 | VNDA | Employee Stock Option (right to buy) | Common Stock | $0.33 | Feb. 10, 2015 | 45,141 | Disposed |
| Dec. 14, 2009 | VNDA | Employee Stock Option (right to buy) | Common Stock | $0.33 | Sept. 1, 2014 | 8,424 | Disposed |
| Dec. 14, 2009 | VNDA | Employee Stock Option (right to buy) | Common Stock | $0.33 | Sept. 1, 2014 | 36,444 | Disposed |
| May 22, 2009 | VNDA | Employee Stock Option (Right to Buy) | Common Stock | $12.55 | May 21, 2019 | 75,000 | Acquired |
| May 11, 2009 | VNDA | Restricted Stock Units | Common Stock | · | · | 25,000 | Disposed |
| May 6, 2009 | VNDA | Restricted Stock Units | Common Stock | · | · | 25,000 | Acquired |
| Jan. 4, 2008 | VNDA | Employee Stock Option (Right to Buy) | Common Stock | $5.76 | Jan. 3, 2018 | 120,000 | Acquired |
| Oct. 1, 2007 | VNDA | Employee Stock Option (Right to Buy) | Common Stock | $0.33 | Sept. 1, 2014 | 3,200 | Disposed |
| June 1, 2007 | VNDA | Employee Stock Option (Right to Buy) | Common Stock | $0.33 | Feb. 10, 2015 | 3,200 | Disposed |
| April 2, 2007 | VNDA | Employee Stock Option (Right to Buy) | Common Stock | $0.33 | Sept. 1, 2014 | 3,200 | Disposed |
| Feb. 1, 2007 | VNDA | Employee Stock Option (Right to Buy) | Common Stock | $0.33 | Sept. 1, 2014 | 3,200 | Disposed |
| Jan. 30, 2007 | VNDA | Non-Qualified Stock Option (Right to Buy) | Common Stock | $30.65 | Jan. 30, 2017 | 250,000 | Acquired |
| Dec. 11, 2006 | VNDA | Employee Stock Option (right to buy) | Common Stock | $0.33 | Sept. 1, 2014 | 15,000 | Disposed |
| Nov. 8, 2006 | VNDA | Employee Stock Option (right to buy) | Common Stock | $0.33 | Sept. 1, 2014 | 18,600 | Disposed |
| Nov. 7, 2006 | VNDA | Employee Stock Option (right to buy) | Common Stock | $0.33 | Sept. 1, 2014 | 400 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 4 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| April 12, 2006 | VNDA | Nonqualified Stock Option (Right to Buy) | · | Direct |
| April 12, 2006 | VNDA | Nonqualified Stock Option (Right to Buy) | · | Direct |
| April 12, 2006 | VNDA | Nonqualified Stock Option (Right to Buy) | · | Direct |
| April 12, 2006 | VNDA | Nonqualified Stock Option (Right to Buy) | · | Direct |
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2010 | $90,252 | · | · | · | · | · | · | $443,060 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.