David D Chang
Insider
First SEC filing: Oct. 10, 2018 · Latest: Oct. 10, 2018
Insider at
Insider transactions
0 buys (P)
2 sells (S)
Net: $-289,459
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 |
|---|---|---|---|---|---|---|---|---|---|
| March 16, 2026 | ALLO | S | 47,763 | $2.47 | $117,975 | 5,150,599 Direct | -0.92% | Disposed | -40.9% (price as of 2026-10-06) |
| Feb. 2, 2026 | ALLO | S | 95,269 | $1.80 | $171,484 | 5,185,862 Direct | -1.80% | Disposed | -18.9% (price as of 2026-10-06) |
| Feb. 2, 2026 | ALLO | A | 1,387,931 | · | · | 1,387,931 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 2, 2026 | ALLO | A | 392,586 | · | · | 392,586 Direct | · | Acquired | (price as of 2026-10-06) |
| March 14, 2025 | ALLO | S | 46,668 | $1.96 | $91,469 | 5,276,569 Direct | -0.88% | Disposed | -25.5% (price as of 2026-10-06) |
| Feb. 3, 2025 | ALLO | S | 46,003 | $1.68 | $77,285 | 5,317,237 Direct | -0.86% | Disposed | -13.1% (price as of 2026-10-06) |
| Jan. 24, 2025 | ALLO | A | 552,174 | · | · | 5,363,240 Direct | +11.48% | Acquired | (price as of 2026-10-06) |
| Jan. 24, 2025 | ALLO | A | 1,952,130 | · | · | 1,952,130 Direct | · | Acquired | (price as of 2026-10-06) |
| May 16, 2024 | ALLO | A | 344,828 | $2.90 | $1,000,001 | 4,810,106 Direct | +7.72% | Acquired | -49.7% (price as of 2026-10-06) |
| March 14, 2024 | ALLO | F | 53,393 | $4.33 | $231,192 | 4,465,278 Direct | -1.18% | Disposed | -66.3% (price as of 2026-10-06) |
| Jan. 25, 2024 | ALLO | A | 317,800 | · | · | 4,513,203 Direct | +7.57% | Acquired | (price as of 2026-10-06) |
| Jan. 25, 2024 | ALLO | A | 1,123,535 | · | · | 1,123,535 Direct | · | Acquired | (price as of 2026-10-06) |
| March 22, 2023 | ALLO | A | 1,924,464 | · | · | 4,193,911 Direct | +84.80% | Acquired | (price as of 2026-10-06) |
| March 22, 2023 | ALLO | A | 1,492,200 | · | · | 1,492,200 Direct | · | Acquired | (price as of 2026-10-06) |
| March 14, 2023 | ALLO | F | 22,340 | $5.56 | $124,210 | 2,269,447 Direct | -0.97% | Disposed | -73.7% (price as of 2026-10-06) |
| March 23, 2022 | ALLO | A | 2,195,512 | · | · | 2,195,512 Direct | · | Acquired | (price as of 2026-10-06) |
| March 15, 2022 | ALLO | S | 23,648 | $7.65 | $180,907 | 2,289,652 Direct | -1.02% | Disposed | -80.9% (price as of 2026-10-06) |
| May 24, 2021 | ALLO | M | 27,410 | · | · | 541,190 Direct | -4.82% | Disposed | (price as of 2026-10-06) |
| May 24, 2021 | ALLO | M | 27,410 | $18.22 | $499,410 | 2,312,279 Direct | +1.20% | Acquired | -92.0% (price as of 2026-10-06) |
| March 26, 2021 | ALLO | A | 298,836 | · | · | 298,836 Direct | · | Acquired | (price as of 2026-10-06) |
| March 26, 2021 | ALLO | A | 80,452 | · | · | 2,284,869 Direct | +3.65% | Acquired | (price as of 2026-10-06) |
| March 15, 2021 | ALLO | S | 20,513 | $38.57 | $791,186 | 2,204,417 Direct | -0.92% | Disposed | -96.2% (price as of 2026-10-06) |
| Aug. 31, 2020 | ALLO | G | 205,778 | · | · | 856,044 Indirect | +31.65% | Acquired | (price as of 2026-10-06) |
| Aug. 31, 2020 | ALLO | G | 205,778 | · | · | 856,044 Indirect | +31.65% | Acquired | (price as of 2026-10-06) |
| April 24, 2020 | ALLO | J | 9,187 | · | · | 2,224,101 Direct | +0.41% | Acquired | (price as of 2026-10-06) |
| April 24, 2020 | ALLO | J 10b5-1 | 9,198 | · | · | 1,201,108 Indirect | +0.77% | Acquired | (price as of 2026-10-06) |
| March 18, 2020 | ALLO | G | 428,022 | · | · | 650,266 Indirect | +192.59% | Acquired | (price as of 2026-10-06) |
| March 18, 2020 | ALLO | G | 428,022 | · | · | 650,266 Indirect | +192.59% | Acquired | (price as of 2026-10-06) |
| March 18, 2020 | ALLO | A | 568,600 | · | · | 568,600 Direct | · | Acquired | (price as of 2026-10-06) |
| March 16, 2020 | ALLO | S | 1,625 | $20.06 | $32,598 | 2,214,914 Direct | -0.07% | Disposed | -92.7% (price as of 2026-10-06) |
| March 16, 2020 | ALLO | S | 18,710 | $19.24 | $359,980 | 2,215,426 Direct | -0.84% | Disposed | -92.4% (price as of 2026-10-06) |
| March 4, 2020 | ALLO | J | 9,391 | · | · | 2,234,136 Direct | +0.42% | Acquired | (price as of 2026-10-06) |
| March 4, 2020 | ALLO | J 10b5-1 | 9,402 | · | · | 1,191,910 Indirect | +0.80% | Acquired | (price as of 2026-10-06) |
| Nov. 19, 2019 | ALLO | J | 9,391 | · | · | 2,224,745 Direct | +0.42% | Acquired | (price as of 2026-10-06) |
| Nov. 19, 2019 | ALLO | J 10b5-1 | 9,402 | · | · | 1,182,508 Indirect | +0.80% | Acquired | (price as of 2026-10-06) |
| Oct. 25, 2019 | ALLO | J | 9,391 | · | · | 2,215,354 Direct | +0.43% | Acquired | (price as of 2026-10-06) |
| Oct. 25, 2019 | ALLO | J 10b5-1 | 9,402 | · | · | 1,173,106 Indirect | +0.81% | Acquired | (price as of 2026-10-06) |
| Sept. 23, 2019 | ALLO | J | 9,391 | · | · | 2,205,963 Direct | +0.43% | Acquired | (price as of 2026-10-06) |
| Sept. 23, 2019 | ALLO | J 10b5-1 | 9,402 | · | · | 1,163,704 Indirect | +0.81% | Acquired | (price as of 2026-10-06) |
| Sept. 5, 2019 | ALLO | J | 9,391 | · | · | 2,195,469 Direct | +0.43% | Acquired | (price as of 2026-10-06) |
| Sept. 5, 2019 | ALLO | J 10b5-1 | 9,402 | · | · | 1,154,302 Indirect | +0.82% | Acquired | (price as of 2026-10-06) |
| July 18, 2019 | ALLO | J | 9,391 | · | · | 2,186,078 Direct | +0.43% | Acquired | (price as of 2026-10-06) |
| July 18, 2019 | ALLO | J 10b5-1 | 9,402 | · | · | 1,144,900 Indirect | +0.83% | Acquired | (price as of 2026-10-06) |
| July 10, 2019 | ALLO | J | 6,388 | · | · | 2,176,687 Direct | +0.29% | Acquired | (price as of 2026-10-06) |
| June 18, 2019 | ALLO | J 10b5-1 | 10,154 | · | · | 1,135,498 Indirect | +0.90% | Acquired | (price as of 2026-10-06) |
| May 13, 2019 | ALLO | J 10b5-1 | 11,753 | · | · | 1,125,344 Indirect | +1.06% | Acquired | (price as of 2026-10-06) |
| April 26, 2019 | ALLO | J 10b5-1 | 11,753 | · | · | 1,113,591 Indirect | +1.07% | Acquired | (price as of 2026-10-06) |
| March 13, 2019 | ALLO | A | 292,700 | · | · | 292,700 Direct | · | Acquired | (price as of 2026-10-06) |
| March 13, 2019 | ALLO | A | 173,000 | · | · | 2,168,625 Direct | +8.67% | Acquired | (price as of 2026-10-06) |
| Oct. 15, 2018 | ALLO | C | 5,704 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-06) |
| Oct. 15, 2018 | ALLO | C | 29,946 | · | · | 1,101,838 Indirect | +2.79% | Acquired | (price as of 2026-10-06) |
| Oct. 15, 2018 | ALLO | P | 40,000 | $18.00 | $720,000 | 1,995,625 Direct | +2.05% | Acquired | -91.9% (price as of 2026-10-06) |
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. 2, 2026 | ALLO | Stock Option (Right to buy) | Common Stock | $1.87 | Feb. 2, 2036 | 1,387,931 | Acquired |
| Feb. 2, 2026 | ALLO | Restricted Stock Unit | Common Stock | · | · | 392,586 | Acquired |
| Jan. 24, 2025 | ALLO | Stock Option (Right to buy) | Common Stock | $1.94 | Jan. 24, 2035 | 1,952,130 | Acquired |
| Jan. 25, 2024 | ALLO | Stock Option (Right to buy) | Common Stock | $3.20 | Jan. 25, 2034 | 1,123,535 | Acquired |
| March 22, 2023 | ALLO | Stock Option (Right to Buy) | Common Stock | $5.04 | March 22, 2033 | 1,492,200 | Acquired |
| March 23, 2022 | ALLO | Stock Option (Right to Buy) | Common Stock | $9.69 | March 23, 2032 | 2,195,512 | Acquired |
| May 24, 2021 | ALLO | Stock Option (Right to Buy) | Common Stock | $18.22 | March 18, 2030 | 27,410 | Disposed |
| March 26, 2021 | ALLO | Stock Option (Right to Buy) | Common Stock | $33.78 | March 26, 2031 | 298,836 | Acquired |
| March 18, 2020 | ALLO | Stock Option (Right to Buy) | Common Stock | $18.22 | March 17, 2030 | 568,600 | Acquired |
| March 13, 2019 | ALLO | Employee Stock Option (Right to Buy) | Common Stock | $26.89 | March 12, 2029 | 292,700 | Acquired |
| Oct. 15, 2018 | ALLO | Series A Convertible Preferred Stock | Common Stock | · | · | 5,704 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 5 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Oct. 10, 2018 | ALLO | Common Stock | 1,955,625 | Direct |
| Oct. 10, 2018 | ALLO | Common Stock | 1,071,892 | Indirect |
| Oct. 10, 2018 | ALLO | Common Stock | 848,022 | Indirect |
| Oct. 10, 2018 | ALLO | Common Stock | 848,022 | Indirect |
| Oct. 10, 2018 | ALLO | Series A Convertible Preferred Stock | 29,946 | 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 |
|---|---|---|---|---|---|---|---|---|
| 2025 | $724,000 | · | · | · | $400,010 | · | $14,217 | $6,136,093 |
| 2024 | $724,000 | · | · | · | $329,420 | · | $10,145 | $4,482,208 |
| 2023 | $724,000 | · | $7,996,888 | $5,070,365 | $270,595 | · | · | $14,061,848 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.