Gregory Ian Frost
CIK 1283518 · View on SEC EDGAR ↗
First SEC filing: Feb. 11, 2005 · Latest: Feb. 9, 2007
On this page
- Insider at Companies where this person is a reporting insider.
- Insider transactions Every share this person bought or sold, from Form 4 filings.
- Derivatives Options and other derivative holdings reported by this person.
- Initial holdings The stakes this person held when they first started reporting.
- Compensation Executive pay disclosed in company proxy statements.
Insider at
Insider transactions
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 |
|---|---|---|---|---|---|---|---|---|---|
| Oct. 25, 2007 | HALO | S 10b5-1 | 400 | $8.91 | $3,564 | 3,084,206 Direct | -0.01% | Disposed | 1102.2% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 300 | $8.92 | $2,676 | 3,083,906 Direct | -0.01% | Disposed | 1100.9% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 300 | $8.93 | $2,679 | 3,083,606 Direct | -0.01% | Disposed | 1099.6% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 1,100 | $8.94 | $9,834 | 3,082,506 Direct | -0.04% | Disposed | 1098.2% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 1,900 | $8.95 | $17,005 | 3,080,606 Direct | -0.06% | Disposed | 1096.9% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 700 | $8.96 | $6,272 | 3,079,906 Direct | -0.02% | Disposed | 1095.5% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 700 | $8.97 | $6,279 | 3,079,206 Direct | -0.02% | Disposed | 1094.2% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 1,354 | $8.98 | $12,159 | 3,077,852 Direct | -0.04% | Disposed | 1092.9% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 600 | $8.99 | $5,394 | 3,077,252 Direct | -0.02% | Disposed | 1091.5% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 46 | $9.00 | $414 | 3,077,206 Direct | 0.00% | Disposed | 1090.2% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 200 | $9.01 | $1,802 | 3,077,006 Direct | -0.01% | Disposed | 1088.9% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 1,100 | $9.02 | $9,922 | 3,075,906 Direct | -0.04% | Disposed | 1087.6% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 200 | $9.03 | $1,806 | 3,075,706 Direct | -0.01% | Disposed | 1086.3% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 900 | $9.04 | $8,136 | 3,074,806 Direct | -0.03% | Disposed | 1085.0% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 400 | $9.05 | $3,620 | 3,074,406 Direct | -0.01% | Disposed | 1083.6% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 200 | $9.06 | $1,812 | 3,074,206 Direct | -0.01% | Disposed | 1082.3% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 100 | $9.07 | $907 | 3,074,106 Direct | 0.00% | Disposed | 1081.0% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 600 | $9.08 | $5,448 | 3,073,506 Direct | -0.02% | Disposed | 1079.7% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 600 | $9.09 | $5,454 | 3,072,906 Direct | -0.02% | Disposed | 1078.4% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 300 | $9.11 | $2,733 | 3,072,606 Direct | -0.01% | Disposed | 1075.9% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 100 | $9.12 | $912 | 3,072,506 Direct | 0.00% | Disposed | 1074.6% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 400 | $9.13 | $3,652 | 3,072,106 Direct | -0.01% | Disposed | 1073.3% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 800 | $9.14 | $7,312 | 3,071,306 Direct | -0.03% | Disposed | 1072.0% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 800 | $9.15 | $7,320 | 3,070,506 Direct | -0.03% | Disposed | 1070.7% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 25 | $9.16 | $229 | 3,070,481 Direct | 0.00% | Disposed | 1069.4% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 200 | $9.17 | $1,834 | 3,070,281 Direct | -0.01% | Disposed | 1068.2% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 400 | $9.18 | $3,672 | 3,069,881 Direct | -0.01% | Disposed | 1066.9% (price as of 2026-08-21) |
| Oct. 25, 2007 | HALO | S 10b5-1 | 275 | $9.20 | $2,530 | 3,069,606 Direct | -0.01% | Disposed | 1064.3% (price as of 2026-08-21) |
| Oct. 24, 2007 | HALO | S 10b5-1 | 690 | $8.91 | $6,148 | 3,083,916 Direct | -0.02% | Disposed | 1102.2% (price as of 2026-08-21) |
| Oct. 24, 2007 | HALO | S 10b5-1 | 854 | $8.92 | $7,618 | 3,083,062 Direct | -0.03% | Disposed | 1100.9% (price as of 2026-08-21) |
| Oct. 24, 2007 | HALO | S 10b5-1 | 500 | $8.93 | $4,465 | 3,082,562 Direct | -0.02% | Disposed | 1099.6% (price as of 2026-08-21) |
| Oct. 24, 2007 | HALO | S 10b5-1 | 556 | $8.94 | $4,971 | 3,082,006 Direct | -0.02% | Disposed | 1098.2% (price as of 2026-08-21) |
| Oct. 24, 2007 | HALO | S 10b5-1 | 1,500 | $8.95 | $13,425 | 3,080,506 Direct | -0.05% | Disposed | 1096.9% (price as of 2026-08-21) |
| Oct. 24, 2007 | HALO | S 10b5-1 | 3,040 | $8.96 | $27,238 | 3,077,466 Direct | -0.10% | Disposed | 1095.5% (price as of 2026-08-21) |
| Oct. 24, 2007 | HALO | S 10b5-1 | 1,600 | $8.97 | $14,352 | 3,075,866 Direct | -0.05% | Disposed | 1094.2% (price as of 2026-08-21) |
| Oct. 24, 2007 | HALO | S 10b5-1 | 500 | $8.98 | $4,490 | 3,075,366 Direct | -0.02% | Disposed | 1092.9% (price as of 2026-08-21) |
| Oct. 24, 2007 | HALO | S 10b5-1 | 760 | $8.99 | $6,832 | 3,074,606 Direct | -0.02% | Disposed | 1091.5% (price as of 2026-08-21) |
| Oct. 24, 2007 | HALO | S 10b5-1 | 900 | $9.00 | $8,100 | 3,073,706 Direct | -0.03% | Disposed | 1090.2% (price as of 2026-08-21) |
| Oct. 24, 2007 | HALO | S 10b5-1 | 400 | $9.01 | $3,604 | 3,073,306 Direct | -0.01% | Disposed | 1088.9% (price as of 2026-08-21) |
| Oct. 24, 2007 | HALO | S 10b5-1 | 1,500 | $9.02 | $13,530 | 3,071,806 Direct | -0.05% | Disposed | 1087.6% (price as of 2026-08-21) |
| Oct. 24, 2007 | HALO | S 10b5-1 | 600 | $9.04 | $5,424 | 3,071,206 Direct | -0.02% | Disposed | 1085.0% (price as of 2026-08-21) |
| Oct. 24, 2007 | HALO | S 10b5-1 | 500 | $9.09 | $4,545 | 3,070,706 Direct | -0.02% | Disposed | 1078.4% (price as of 2026-08-21) |
| Oct. 24, 2007 | HALO | S 10b5-1 | 400 | $9.10 | $3,640 | 3,070,306 Direct | -0.01% | Disposed | 1077.1% (price as of 2026-08-21) |
| Oct. 24, 2007 | HALO | S 10b5-1 | 500 | $9.11 | $4,555 | 3,069,806 Direct | -0.02% | Disposed | 1075.9% (price as of 2026-08-21) |
| Oct. 24, 2007 | HALO | S 10b5-1 | 200 | $9.12 | $1,824 | 3,069,606 Direct | -0.01% | Disposed | 1074.6% (price as of 2026-08-21) |
| Sept. 27, 2007 | HALO | S 10b5-1 | 200 | $8.76 | $1,752 | 3,034,406 Direct | -0.01% | Disposed | 1122.8% (price as of 2026-08-21) |
| Sept. 27, 2007 | HALO | S 10b5-1 | 700 | $8.77 | $6,139 | 3,033,706 Direct | -0.02% | Disposed | 1121.4% (price as of 2026-08-21) |
| Sept. 27, 2007 | HALO | S 10b5-1 | 300 | $8.79 | $2,637 | 3,033,406 Direct | -0.01% | Disposed | 1118.7% (price as of 2026-08-21) |
| Sept. 27, 2007 | HALO | S 10b5-1 | 100 | $8.80 | $880 | 3,033,306 Direct | 0.00% | Disposed | 1117.3% (price as of 2026-08-21) |
| Sept. 27, 2007 | HALO | S 10b5-1 | 500 | $8.81 | $4,405 | 3,032,806 Direct | -0.02% | Disposed | 1115.9% (price as of 2026-08-21) |
| Sept. 27, 2007 | HALO | S 10b5-1 | 1,200 | $8.82 | $10,584 | 3,031,606 Direct | -0.04% | Disposed | 1114.5% (price as of 2026-08-21) |
| Sept. 27, 2007 | HALO | S 10b5-1 | 1,400 | $8.83 | $12,362 | 3,030,206 Direct | -0.05% | Disposed | 1113.1% (price as of 2026-08-21) |
| Sept. 27, 2007 | HALO | S 10b5-1 | 100 | $8.84 | $884 | 3,030,106 Direct | 0.00% | Disposed | 1111.8% (price as of 2026-08-21) |
| Sept. 27, 2007 | HALO | S 10b5-1 | 700 | $8.85 | $6,195 | 3,029,406 Direct | -0.02% | Disposed | 1110.4% (price as of 2026-08-21) |
| Sept. 27, 2007 | HALO | S 10b5-1 | 2,100 | $8.86 | $18,606 | 3,027,306 Direct | -0.07% | Disposed | 1109.0% (price as of 2026-08-21) |
| Sept. 27, 2007 | HALO | S 10b5-1 | 1,200 | $8.87 | $10,644 | 3,026,106 Direct | -0.04% | Disposed | 1107.7% (price as of 2026-08-21) |
| Sept. 26, 2007 | HALO | S 10b5-1 | 300 | $8.93 | $2,679 | 3,034,306 Direct | -0.01% | Disposed | 1099.6% (price as of 2026-08-21) |
| Sept. 26, 2007 | HALO | S 10b5-1 | 700 | $8.95 | $6,265 | 3,033,606 Direct | -0.02% | Disposed | 1096.9% (price as of 2026-08-21) |
| Sept. 26, 2007 | HALO | S 10b5-1 | 400 | $8.96 | $3,584 | 3,033,206 Direct | -0.01% | Disposed | 1095.5% (price as of 2026-08-21) |
| Sept. 26, 2007 | HALO | S 10b5-1 | 400 | $8.97 | $3,588 | 3,032,806 Direct | -0.01% | Disposed | 1094.2% (price as of 2026-08-21) |
| Sept. 26, 2007 | HALO | S 10b5-1 | 500 | $8.98 | $4,490 | 3,032,306 Direct | -0.02% | Disposed | 1092.9% (price as of 2026-08-21) |
| Sept. 26, 2007 | HALO | S 10b5-1 | 400 | $8.99 | $3,596 | 3,031,906 Direct | -0.01% | Disposed | 1091.5% (price as of 2026-08-21) |
| Sept. 26, 2007 | HALO | S 10b5-1 | 1,400 | $9.00 | $12,600 | 3,030,506 Direct | -0.05% | Disposed | 1090.2% (price as of 2026-08-21) |
| Sept. 26, 2007 | HALO | S 10b5-1 | 2,200 | $9.01 | $19,822 | 3,028,306 Direct | -0.07% | Disposed | 1088.9% (price as of 2026-08-21) |
| Sept. 26, 2007 | HALO | S 10b5-1 | 900 | $9.02 | $8,118 | 3,027,406 Direct | -0.03% | Disposed | 1087.6% (price as of 2026-08-21) |
| Sept. 26, 2007 | HALO | S 10b5-1 | 410 | $9.04 | $3,706 | 3,026,996 Direct | -0.01% | Disposed | 1085.0% (price as of 2026-08-21) |
| Sept. 26, 2007 | HALO | S 10b5-1 | 1,090 | $9.06 | $9,875 | 3,025,906 Direct | -0.04% | Disposed | 1082.3% (price as of 2026-08-21) |
| Sept. 26, 2007 | HALO | S 10b5-1 | 700 | $9.07 | $6,349 | 3,025,206 Direct | -0.02% | Disposed | 1081.0% (price as of 2026-08-21) |
| Sept. 26, 2007 | HALO | S 10b5-1 | 700 | $9.08 | $6,356 | 3,024,506 Direct | -0.02% | Disposed | 1079.7% (price as of 2026-08-21) |
| Sept. 26, 2007 | HALO | S 10b5-1 | 400 | $9.10 | $3,640 | 3,024,106 Direct | -0.01% | Disposed | 1077.1% (price as of 2026-08-21) |
| Sept. 26, 2007 | HALO | S 10b5-1 | 400 | $9.11 | $3,644 | 3,023,706 Direct | -0.01% | Disposed | 1075.9% (price as of 2026-08-21) |
| Sept. 26, 2007 | HALO | S 10b5-1 | 1,600 | $9.12 | $14,592 | 3,022,106 Direct | -0.05% | Disposed | 1074.6% (price as of 2026-08-21) |
| Sept. 26, 2007 | HALO | S 10b5-1 | 300 | $9.14 | $2,742 | 3,021,806 Direct | -0.01% | Disposed | 1072.0% (price as of 2026-08-21) |
| Sept. 26, 2007 | HALO | S 10b5-1 | 300 | $9.15 | $2,745 | 3,021,506 Direct | -0.01% | Disposed | 1070.7% (price as of 2026-08-21) |
| Sept. 26, 2007 | HALO | S 10b5-1 | 300 | $9.16 | $2,748 | 3,021,206 Direct | -0.01% | Disposed | 1069.4% (price as of 2026-08-21) |
| Sept. 26, 2007 | HALO | S 10b5-1 | 500 | $9.17 | $4,585 | 3,020,706 Direct | -0.02% | Disposed | 1068.2% (price as of 2026-08-21) |
| Sept. 26, 2007 | HALO | S 10b5-1 | 600 | $9.21 | $5,526 | 3,020,106 Direct | -0.02% | Disposed | 1063.1% (price as of 2026-08-21) |
| Sept. 26, 2007 | HALO | S 10b5-1 | 200 | $9.22 | $1,844 | 3,019,906 Direct | -0.01% | Disposed | 1061.8% (price as of 2026-08-21) |
Showing latest 100 of 391 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 |
|---|---|---|---|---|---|---|---|
| May 28, 2015 | PGEN | Option to Purchase Common Stock (Right to Buy) | Common Stock (200,000) | $22.77 | Jan. 6, 2024 | 200,000 | Disposed |
| Aug. 12, 2013 | HALO | Option to Purchase Common Stock | Common Stock (20,000) | $2.05 | Oct. 13, 2014 | 20,000 | Disposed |
| Feb. 2, 2012 | HALO | Restricted Stock Units | Common Stock (96,065) | $0.00 | Feb. 2, 2022 | 96,065 | Acquired |
| Feb. 2, 2012 | HALO | Restricted Stock Units | Common Stock (30,000) | $0.00 | Feb. 2, 2022 | 30,000 | Acquired |
| Feb. 2, 2012 | HALO | Option to Purchase Common Stock | Common Stock (60,000) | $11.29 | Feb. 2, 2022 | 60,000 | Acquired |
| May 5, 2011 | HALO | Option to Purchase Common Stock | Common Stock (2,000) | $6.21 | May 5, 2021 | 2,000 | Acquired |
| Feb. 5, 2009 | HALO | Option to Purchase Common Stock | Common Stock (80,000) | $6.10 | Feb. 5, 2019 | 80,000 | Acquired |
| Nov. 9, 2007 | HALO | Option to Purchase Common Stock | Common Stock (42,340) | $0.43 | Nov. 11, 2008 | 42,340 | Disposed |
| Oct. 25, 2007 | HALO | Option to Purchase Common Stock | Common Stock (15,754) | $0.43 | Nov. 11, 2008 | 15,754 | Disposed |
| Oct. 24, 2007 | HALO | Option to Purchase Common Stock | Common Stock (15,747) | $0.43 | Nov. 11, 2008 | 15,747 | Disposed |
| Sept. 28, 2007 | HALO | Option to Purchase Common Stock | Common Stock (52,602) | $0.43 | Nov. 11, 2008 | 52,602 | Disposed |
| Sept. 27, 2007 | HALO | Option to Purchase Common Stock | Common Stock (15,757) | $0.43 | Nov. 11, 2008 | 15,757 | Disposed |
| Sept. 26, 2007 | HALO | Option to Purchase Common Stock | Common Stock (15,746) | $0.43 | Nov. 11, 2008 | 15,746 | Disposed |
| Aug. 30, 2007 | HALO | Options to Purchase Common Stock | Common Stock (15,815) | $0.43 | Nov. 11, 2008 | 15,815 | Disposed |
| Aug. 29, 2007 | HALO | Options to Purchase Common Stock | Common Stock (15,801) | $0.43 | Nov. 11, 2008 | 15,801 | Disposed |
| Aug. 6, 2007 | HALO | Options to Purchase Common Stock | Common Stock (52,767) | $0.43 | Nov. 11, 2008 | 52,767 | Disposed |
| Aug. 2, 2007 | HALO | Options to Purchase Common Stock | Common Stock (15,816) | $0.43 | Nov. 11, 2008 | 15,816 | Disposed |
| Aug. 2, 2007 | HALO | Options to Purchase Common Stock | Common Stock (15,816) | $0.43 | Nov. 11, 2008 | 15,816 | Disposed |
| Aug. 1, 2007 | HALO | Options to Purchase Common Stock | Common Stock (15,850) | $0.43 | Nov. 11, 2008 | 15,850 | Disposed |
| Aug. 1, 2007 | HALO | Options to Purchase Common Stock | Common Stock (15,850) | $0.43 | Nov. 11, 2008 | 15,850 | Disposed |
| July 9, 2007 | HALO | Options to Purchase Common Stock | Common Stock (41,812) | $0.43 | Nov. 11, 2008 | 41,812 | Disposed |
| July 6, 2007 | HALO | Option to Purchase Common Stock | Common Stock (26,128) | $0.43 | Nov. 11, 2008 | 26,128 | Disposed |
| July 5, 2007 | HALO | Option to Purchase Common Stock | Common Stock (15,693) | $0.43 | Nov. 11, 2008 | 15,693 | Disposed |
| June 12, 2007 | HALO | Warrant | Common Stock (22,241) | $0.45 | Oct. 20, 2007 | 22,241 | Disposed |
| June 12, 2007 | HALO | Options to Purchase Common Stock | Common Stock (20,896) | $0.43 | Nov. 11, 2008 | 20,896 | Disposed |
| June 7, 2007 | HALO | Options to Purchase Common Stock | Common Stock (20,853) | $0.43 | Nov. 11, 2008 | 20,853 | Disposed |
| June 7, 2007 | HALO | Options to Purchase Common Stock | Common Stock (20,853) | $0.43 | Nov. 11, 2008 | 20,853 | Disposed |
| June 6, 2007 | HALO | Options to Purchase Common Stock | Common Stock (20,849) | $0.43 | Nov. 11, 2008 | 20,849 | Disposed |
| June 6, 2007 | HALO | Options to Purchase Common Stock | Common Stock (20,849) | $0.43 | Nov. 11, 2008 | 20,849 | Disposed |
| Feb. 5, 2007 | HALO | Option to Purchase Common Stock | Common (15,729) | $7.51 | Feb. 5, 2017 | 15,729 | Acquired |
| Jan. 10, 2005 | HALO | Options to Purchase Common Stock | Common Stock (100,000) | $0.43 | Nov. 11, 2008 | 100,000 | Disposed |
| Jan. 10, 2005 | HALO | Option to Purchase Common Stock | Common Stock (100,000) | $0.43 | Nov. 11, 2008 | 100,000 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 10 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Feb. 11, 2005 | HALO | Common Stock | 2,953,779 | Direct |
| Feb. 11, 2005 | HALO | Options to Purchase Common Stock→ Common Stock (1,235,601) | 1,235,601 | Direct |
| Feb. 11, 2005 | HALO | Warrants to Purchase Common Stock (2003 Bridge Financing)→ Common Stock (22,241) | 22,241 | Direct |
| March 19, 2004 | HALO | Common Stock | 2,953,779 | Direct |
| March 19, 2004 | HALO | Common Stock | 190,072 | Indirect |
| March 19, 2004 | HALO | Options to Purchase Common Stock→ Common Stock (230,153) | 230,153 | Direct |
| March 19, 2004 | HALO | Options to Purchase Common Stock→ Common Stock (78,748) | 78,748 | Direct |
| March 19, 2004 | HALO | Warrants to Purchase Common Stock (2003 Bridge Financing→ Common Stock (22,241) | 22,241 | Direct |
| March 19, 2004 | HALO | Warrants to Purchase Common Stock (2003 Bridge Financing)→ Common Stock (22,241) | 22,241 | Indirect |
| March 19, 2004 | HALO | Warrants to Purchase Common Stock [F1]→ Common Stock (10,530) | 10,530 | Indirect |
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 |
|---|---|---|---|---|---|---|---|---|
| 2011 | $415,000 | — | — | — | $80,000 | — | $7,788 | $683,524 |
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2014 | $494,231 | $491,781 | — | — | — | — | $19,967 | $14,508,779 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.