Gregory L Weaver
Insider
First SEC filing: March 21, 2013 · Latest: March 21, 2013
Insider at
Insider transactions
2 buys (P)
0 sells (S)
Net: $49,200
Avg return of open purchases vs now: -19.9%
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 |
|---|---|---|---|---|---|---|---|---|---|
| July 31, 2026 | ALT | A | 1,753 | $2.41 | $4,225 | 39,831 Direct | +4.60% | Acquired | 10.8% (price as of 2026-10-05) |
| April 1, 2026 | ALT | P | 10,000 | $3.15 | $31,500 | 38,078 Direct | +35.62% | Acquired | -15.2% (price as of 2026-10-05) |
| March 6, 2026 | ALT | P | 5,000 | $3.54 | $17,700 | 28,078 Direct | +21.67% | Acquired | -24.6% (price as of 2026-10-05) |
| Feb. 26, 2026 | ALT | A | 259,000 | · | · | 259,000 Direct | · | Acquired | (price as of 2026-10-05) |
| Feb. 26, 2026 | ALT | A | 111,000 | · | · | 111,000 Direct | · | Acquired | (price as of 2026-10-05) |
| Nov. 11, 2025 | ALT | M | 18,750 | · | · | 28,750 Direct | +187.50% | Acquired | (price as of 2026-10-05) |
| Nov. 11, 2025 | ALT | F | 5,672 | $4.28 | $24,276 | 23,078 Direct | -19.73% | Disposed | -37.6% (price as of 2026-10-05) |
| Nov. 11, 2025 | ALT | M | 18,750 | · | · | 56,250 Direct | -25.00% | Disposed | (price as of 2026-10-05) |
| Oct. 1, 2025 | ALT | A | 57,900 | · | · | 57,900 Direct | · | Acquired | (price as of 2026-10-05) |
| Oct. 1, 2025 | ALT | A | 166,800 | · | · | 166,800 Direct | · | Acquired | (price as of 2026-10-05) |
| March 13, 2025 | ALT | P | 10,000 | $5.20 | $52,000 | 10,000 Direct | · | Acquired | -48.7% (price as of 2026-10-05) |
| Nov. 11, 2024 | ALT | A | 75,000 | · | · | 75,000 Direct | · | Acquired | (price as of 2026-10-05) |
| Nov. 11, 2024 | ALT | A | 225,000 | · | · | 225,000 Direct | · | Acquired | (price as of 2026-10-05) |
| Nov. 15, 2023 | ATOS | S | 50,000 | $0.65 | $32,500 | 55 Direct | -99.89% | Disposed | -74.9% (price as of 2026-10-05) |
| June 20, 2023 | ATOS | P | 50,000 | $0.97 | $48,500 | 50,055 Direct | +90909.09% | Acquired | -83.2% (price as of 2026-10-05) |
| June 1, 2023 | ATOS | A | 2,600,000 | · | · | 2,600,000 Direct | · | Acquired | (price as of 2026-10-05) |
| May 4, 2023 | ATOS | A | 125,000 | · | · | 125,000 Direct | · | Acquired | (price as of 2026-10-05) |
| May 13, 2022 | ATOS | A | 50,000 | · | · | 50,000 Direct | · | Acquired | (price as of 2026-10-05) |
| March 2, 2022 | ATAI | A | 228,000 | · | · | 228,000 Direct | · | Acquired | |
| July 2, 2021 | ATOS | M | 4,581 | $5.64 | $25,837 | 4,581 Direct | · | Acquired | -97.1% (price as of 2026-10-05) |
| July 2, 2021 | ATOS | M | 45,000 | $2.38 | $107,100 | 49,581 Direct | +982.32% | Acquired | -93.1% (price as of 2026-10-05) |
| July 2, 2021 | ATOS | M | 45,000 | $2.52 | $113,400 | 94,581 Direct | +90.76% | Acquired | -93.5% (price as of 2026-10-05) |
| July 2, 2021 | ATOS | M | 70,000 | $1.70 | $119,000 | 164,581 Direct | +74.01% | Acquired | -90.4% (price as of 2026-10-05) |
| July 2, 2021 | ATOS | F | 57,084 | $6.40 | $365,338 | 107,497 Direct | -34.68% | Disposed | -97.4% (price as of 2026-10-05) |
| July 2, 2021 | ATOS | S | 107,497 | $5.58 | $599,833 | 0 Direct | -100.00% | Disposed | -97.1% (price as of 2026-10-05) |
| July 2, 2021 | ATOS | M | 4,581 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| July 2, 2021 | ATOS | M | 45,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| July 2, 2021 | ATOS | M | 45,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| July 2, 2021 | ATOS | M | 70,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| June 22, 2021 | ATAI | P | 4,666 | $15.00 | $69,990 | 4,666 Direct | · | Acquired | |
| June 17, 2021 | ATAI | A | 67,726 | · | · | 67,726 Direct | · | Acquired | |
| May 14, 2021 | ATOS | A | 50,000 | · | · | 50,000 Direct | · | Acquired | (price as of 2026-10-05) |
| May 15, 2020 | ATOS | A | 70,000 | · | · | 70,000 Direct | · | Acquired | (price as of 2026-10-05) |
| March 15, 2020 | ELOX | M | 3,750 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| March 15, 2020 | ELOX | F | 1,086 | $2.85 | $3,095 | 10,431 Direct | -9.43% | Disposed | 440.7% (price as of 2026-10-05) |
| March 15, 2020 | ELOX | M | 3,750 | · | · | 11,517 Direct | +48.28% | Acquired | (price as of 2026-10-05) |
| Jan. 30, 2020 | ELOX | M | 5,000 | · | · | 15,000 Direct | -25.00% | Disposed | (price as of 2026-10-05) |
| Jan. 30, 2020 | ELOX | F | 1,733 | $3.91 | $6,776 | 7,767 Direct | -18.24% | Disposed | 294.1% (price as of 2026-10-05) |
| Jan. 30, 2020 | ELOX | M | 5,000 | · | · | 9,500 Direct | +111.11% | Acquired | (price as of 2026-10-05) |
| Jan. 30, 2020 | ELOX | M | 5,000 | · | · | 15,000 Direct | +50.00% | Acquired | (price as of 2026-10-05) |
| Jan. 30, 2020 | ELOX | F | 1,733 | $3.91 | $6,776 | 7,767 Direct | -18.24% | Disposed | 294.1% (price as of 2026-10-05) |
| Jan. 30, 2020 | ELOX | M | 5,000 | · | · | 9,500 Direct | +111.11% | Acquired | (price as of 2026-10-05) |
| May 17, 2019 | ATOS | A | 45,000 | · | · | 45,000 Direct | · | Acquired | (price as of 2026-10-05) |
| Jan. 30, 2019 | ELOX | A | 20,000 | · | · | 20,000 Direct | · | Acquired | (price as of 2026-10-05) |
| Jan. 30, 2019 | ELOX | A | 60,000 | · | · | 60,000 Direct | · | Acquired | (price as of 2026-10-05) |
| June 27, 2018 | ATOS | A | 45,000 | · | · | 45,000 Direct | · | Acquired | (price as of 2026-10-05) |
| March 23, 2018 | ELOX | P | 4,500 | $8.56 | $38,520 | 4,500 Direct | · | Acquired | 80.0% (price as of 2026-10-05) |
| Dec. 20, 2017 | ELOX | A | 399,266 | · | · | 399,266 Direct | · | Acquired | (price as of 2026-10-05) |
| Dec. 20, 2017 | ELOX | A | 399,266 | · | · | 399,266 Direct | · | Acquired | (price as of 2026-10-05) |
| May 24, 2017 | ATOS | A | 54,949 | · | · | 69,917 Direct | +367.11% | Acquired | (price as of 2026-10-05) |
| May 18, 2016 | ATOS | A | 112,190 | · | · | 112,190 Direct | · | Acquired | (price as of 2026-10-05) |
| May 12, 2015 | ATOS | A | 40,000 | · | · | 40,000 Direct | · | Acquired | (price as of 2026-10-05) |
| May 6, 2014 | ATOS | D | 24,510 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| May 6, 2014 | ATOS | A | 15,000 | · | · | 15,000 Direct | · | Acquired | (price as of 2026-10-05) |
| Nov. 21, 2013 | ATOS | P | 10,000 | $2.58 | $25,800 | 34,510 Direct | +40.80% | Acquired | -100.0% (price as of 2026-10-05) |
| Oct. 10, 2013 | ATOS | A | 57,190 | · | · | 57,190 Direct | · | Acquired | (price as of 2026-10-05) |
| Oct. 10, 2013 | ATOS | A | 24,510 | · | · | 24,510 Direct | · | Acquired | (price as of 2026-10-05) |
| March 19, 2013 | IMNN | S | 37,272 | $1.06 | $39,508 | 0 Direct | -100.00% | Disposed | -100.0% (price as of 2026-10-05) |
| Dec. 18, 2012 | IMNN | X | 8,636 | $2.77 | $23,922 | 0 Direct | -100.00% | Disposed | -100.0% (price as of 2026-10-05) |
| Dec. 18, 2012 | IMNN | M | 8,636 | $2.77 | $23,922 | 37,272 Direct | +30.16% | Acquired | -100.0% (price as of 2026-10-05) |
| June 15, 2012 | IMNN | A | 36,250 | $2.15 | $77,938 | 282,009 Direct | +14.75% | Acquired | -100.0% (price as of 2026-10-05) |
| Feb. 27, 2012 | IMNN | A | 13,750 | · | · | 245,759 Direct | +5.93% | Acquired | (price as of 2026-10-05) |
| Dec. 6, 2011 | IMNN | P | 5,000 | $2.15 | $10,750 | 28,636 Direct | +21.15% | Acquired | -100.0% (price as of 2026-10-05) |
| July 8, 2011 | IMNN | A | 75,000 | $3.46 | $259,500 | 232,009 Direct | +47.77% | Acquired | -100.0% (price as of 2026-10-05) |
| May 26, 2011 | IMNN | P | 8,636 | $0.12 | $1,036 | 8,636 Direct | · | Acquired | -99.9% (price as of 2026-10-05) |
| May 26, 2011 | IMNN | P | 8,636 | $2.77 | $23,922 | 23,636 Direct | +57.57% | Acquired | -100.0% (price as of 2026-10-05) |
| Feb. 25, 2011 | IMNN | A | 50,000 | $2.49 | $124,500 | 157,009 Direct | +46.73% | Acquired | -100.0% (price as of 2026-10-05) |
| Sept. 16, 2010 | IMNN | P | 5,000 | $3.10 | $15,500 | 15,000 Direct | +50.00% | Acquired | -100.0% (price as of 2026-10-05) |
| Feb. 19, 2010 | IMNN | A | 25,000 | $2.94 | $73,500 | 107,009 Direct | +30.48% | Acquired | -100.0% (price as of 2026-10-05) |
| Jan. 19, 2009 | IMNN | A | 8,334 | $2.72 | $22,668 | 65,344 Direct | +14.62% | Acquired | -100.0% (price as of 2026-10-05) |
| Jan. 19, 2009 | IMNN | A | 8,333 | $2.72 | $22,666 | 73,677 Direct | +12.75% | Acquired | -100.0% (price as of 2026-10-05) |
| Jan. 19, 2009 | IMNN | A | 8,333 | $2.72 | $22,666 | 82,010 Direct | +11.31% | Acquired | -100.0% (price as of 2026-10-05) |
| March 15, 2008 | IMNN | A | 8,334 | $5.47 | $45,587 | 57,010 Direct | +17.12% | Acquired | -100.0% (price as of 2026-10-05) |
| March 15, 2008 | IMNN | A | 8,333 | $5.47 | $45,582 | 48,676 Direct | +20.66% | Acquired | -100.0% (price as of 2026-10-05) |
| March 15, 2008 | IMNN | A | 8,333 | $5.47 | $45,582 | 40,343 Direct | +26.03% | Acquired | -100.0% (price as of 2026-10-05) |
| March 22, 2007 | IMNN | A | 25,000 | · | · | 32,010 Direct | +356.63% | Acquired | (price as of 2026-10-05) |
| Feb. 23, 2007 | IMNN | P | 10,000 | $3.50 | $35,000 | 10,000 Direct | · | Acquired | -100.0% (price as of 2026-10-05) |
| March 15, 2006 | IMNN | A | 3,676 | · | · | 7,010 Direct | +110.26% | Acquired | (price as of 2026-10-05) |
| Aug. 12, 2005 | IMNN | A | 50,000 | · | · | 50,000 Direct | · | Acquired | (price as of 2026-10-05) |
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. 26, 2026 | ALT | Stock Options (option to buy) | Common Stock, par value $0.0001 | $4.46 | Feb. 26, 2036 | 259,000 | Acquired |
| Feb. 26, 2026 | ALT | Restricted Stock Units | Common Stock, par value $0.0001 | · | · | 111,000 | Acquired |
| Nov. 11, 2025 | ALT | Restricted Stock Units | Common Stock, par value $0.0001 | · | · | 18,750 | Disposed |
| Oct. 1, 2025 | ALT | Restricted Stock Units | Common Stock, par value $0.0001 | · | · | 57,900 | Acquired |
| Oct. 1, 2025 | ALT | Stock Options (option to buy) | Common Stock, par value $0.0001 | $3.87 | Oct. 1, 2035 | 166,800 | Acquired |
| Nov. 11, 2024 | ALT | Restricted Stock Units | Common Stock, par value $0.0001 | · | · | 75,000 | Acquired |
| Nov. 11, 2024 | ALT | Stock Options (option to buy) | Common Stock, par value $0.0001 | $7.35 | Nov. 11, 2034 | 225,000 | Acquired |
| June 1, 2023 | ATOS | Stock Option (right to buy) | Common Stock | $0.92 | June 1, 2033 | 2,600,000 | Acquired |
| May 4, 2023 | ATOS | Stock Option (right to buy) | Common Stock | $0.66 | May 4, 2033 | 125,000 | Acquired |
| May 13, 2022 | ATOS | Stock Option (right to buy) | Common Stock | $0.93 | May 13, 2032 | 50,000 | Acquired |
| March 2, 2022 | ATAI | Stock Option | Common Shares | $5.65 | March 1, 2032 | 228,000 | Acquired |
| July 2, 2021 | ATOS | Stock Option (right to buy) | Common Stock | $5.64 | · | 4,581 | Disposed |
| July 2, 2021 | ATOS | Stock Option (right to buy) | Common Stock | $2.38 | · | 45,000 | Disposed |
| July 2, 2021 | ATOS | Stock Option (right to buy) | Common Stock | $2.52 | · | 45,000 | Disposed |
| July 2, 2021 | ATOS | Stock Option (right to buy) | Common Stock | $1.70 | · | 70,000 | Disposed |
| June 17, 2021 | ATAI | Stock Option | Common Shares | $15.00 | June 17, 2031 | 67,726 | Acquired |
| May 14, 2021 | ATOS | Stock Option (right to buy) | Common Stock | $2.90 | May 14, 2031 | 50,000 | Acquired |
| May 15, 2020 | ATOS | Stock Option (right to buy) | Common Stock | $1.70 | May 15, 2030 | 70,000 | Acquired |
| March 15, 2020 | ELOX | Restricted Stock Units | Common Stock | · | · | 3,750 | Disposed |
| Jan. 30, 2020 | ELOX | Restricted Stock Units | Common Stock | · | · | 5,000 | Disposed |
| Jan. 30, 2020 | ELOX | Restricted Stock Units | Common Stock | · | · | 5,000 | Acquired |
| May 17, 2019 | ATOS | Stock Option (right to buy) | Common Stock | $2.52 | May 17, 2029 | 45,000 | Acquired |
| Jan. 30, 2019 | ELOX | Restricted Stock Units | Common Stock | · | · | 20,000 | Acquired |
| Jan. 30, 2019 | ELOX | Stock Options | Common Stock | $11.53 | Jan. 30, 2029 | 60,000 | Acquired |
| June 27, 2018 | ATOS | Stock Option (right to buy) | Common Stock | $2.38 | June 27, 2028 | 45,000 | Acquired |
| Dec. 20, 2017 | ELOX | Employee Stock Option (Right to Buy) | Common Stock | · | Dec. 19, 2027 | 399,266 | Acquired |
| Dec. 20, 2017 | ELOX | Stock Option (Right to Buy) | Common Stock | $7.00 | Dec. 20, 2027 | 399,266 | Acquired |
| May 24, 2017 | ATOS | Stock Option (right to buy) | Common Stock | $0.47 | May 24, 2027 | 54,949 | Acquired |
| May 18, 2016 | ATOS | Stock Option (right to buy) | Common Stock | $0.26 | May 18, 2026 | 112,190 | Acquired |
| May 12, 2015 | ATOS | Stock Option (right to buy) | Common Stock | $1.37 | May 12, 2025 | 40,000 | Acquired |
| May 6, 2014 | ATOS | Stock Option (right to buy) | Common Stock | $1.22 | May 6, 2024 | 15,000 | Acquired |
| Oct. 10, 2013 | ATOS | Stock Option (right to buy) | Common Stock | $2.04 | Oct. 10, 2023 | 57,190 | Acquired |
| Dec. 18, 2012 | IMNN | Warrants to purchase Celsion Corporation Common Stock | Celsion Corporation Common Stock | · | Nov. 25, 2017 | 8,636 | Disposed |
| June 15, 2012 | IMNN | Option to purchase Celsion Corporation Common Stock | Celsion Corporation Common Stock | $2.15 | June 15, 2022 | 36,250 | Acquired |
| Feb. 27, 2012 | IMNN | Option to purchase Celsion Corporation Common Stock | Celsion Corporation Common Stock | $2.09 | Feb. 27, 2022 | 13,750 | Acquired |
| July 8, 2011 | IMNN | Options to Purchase Celsion Corporation Common Stock | Celsion Corporation Common Stock | $3.46 | July 8, 2021 | 75,000 | Acquired |
| May 26, 2011 | IMNN | Warrants to purchase Common Stock [F1] | Celsion Corporation Common Stock | $2.77 | May 26, 2017 | 8,636 | Acquired |
| Feb. 25, 2011 | IMNN | Option to purchase common stock | Celsion Corporation Common Stock | $2.49 | Feb. 25, 2021 | 50,000 | Acquired |
| Feb. 19, 2010 | IMNN | Common Stock Option | Celsion Common Stock | $2.94 | Feb. 19, 2020 | 25,000 | Acquired |
| Jan. 19, 2009 | IMNN | Common Stock Options | Common Stock Options | $2.72 | Jan. 19, 2019 | 8,334 | Acquired |
| Jan. 19, 2009 | IMNN | Common Stock Options | Common Stock Options | $2.72 | Oct. 19, 2019 | 8,333 | Acquired |
| Jan. 19, 2009 | IMNN | Common Stock Options | Common Stock Options | $2.72 | Jan. 19, 2019 | 8,333 | Acquired |
| March 15, 2008 | IMNN | Common Stock Options | Common Stock | $5.47 | March 15, 2018 | 8,334 | Acquired |
| March 15, 2008 | IMNN | Common Stock Options | Common Stock | $5.47 | March 15, 2018 | 8,333 | Acquired |
| March 15, 2008 | IMNN | Common Stock Options | Common Stock | $5.47 | March 15, 2018 | 8,333 | Acquired |
| March 22, 2007 | IMNN | Stock Options | Common Stock | $4.16 | March 22, 2017 | 25,000 | Acquired |
| March 15, 2006 | IMNN | Stock Options | Common Stock | $4.08 | March 15, 2016 | 3,676 | Acquired |
| Aug. 12, 2005 | IMNN | Stock Option | Common Stock | $0.38 | June 23, 2017 | 50,000 | 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 |
|---|---|---|---|---|
| June 17, 2021 | ATAI | Stock Option | 880,000 | 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 |
|---|---|---|---|---|---|---|---|---|
| 2013 | $150,578 | · | · | · | · | · | $50,193 | $200,771 |
| 2012 | $289,233 | · | · | $74,313 | $71,485 | · | $8,700 | $443,731 |
| 2011 | $138,115 | · | · | $269,750 | $47,000 | · | $126,428 | $581,293 |
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2017 | $2,836 | · | · | $1,569,084 | · | · | $19 | $1,571,939 |
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2023 | $197,756 | $43,493 | · | · | · | · | $21,783 | $2,379,426 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.