| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13D/A | 2023-12-18 | BAKER BROS. ADVISORS LP | Seagen Inc. | 0 | 0.0% | EDGAR |
| SC 13G/A | 2023-06-09 | Capital International Investors | Seagen Inc. | 7,227,865 | 3.9% | EDGAR |
| SC 13D/A | 2023-05-03 | BAKER BROS. ADVISORS LP | Seagen Inc. | 44,617,299 | 23.8% | EDGAR |
| SC 13D/A | 2023-03-13 | BAKER BROS. ADVISORS LP | Seagen Inc. | 46,985,656 | 25.1% | EDGAR |
| SC 13G/A | 2023-02-13 | Capital International Investors | Seagen Inc. | 18,058,081 | 9.7% | EDGAR |
| SC 13G/A | 2023-02-10 | Seagen Inc. | PIERIS PHARMACEUTICALS, INC. | 3,706,174 | 5.0% | EDGAR |
| SC 13G/A | 2023-02-09 | VANGUARD GROUP INC | Seagen Inc. | 12,945,078 | 7.0% | EDGAR |
| SC 13G/A | 2023-02-06 | WELLINGTON MANAGEMENT GROUP LLP | Seagen Inc. | 9,881,292 | 5.3% | EDGAR |
| SC 13G/A | 2023-02-01 | BlackRock Inc. | Seagen Inc. | 11,861,464 | 6.4% | EDGAR |
| SC 13D/A | 2022-03-10 | BAKER BROS. ADVISORS LP | Seagen Inc. | 46,975,613 | 25.6% | EDGAR |
| SC 13G/A | 2022-02-11 | Capital International Investors | Seagen Inc. | 12,778,429 | 7.0% | EDGAR |
| SC 13G/A | 2022-02-10 | VANGUARD GROUP INC | Seagen Inc. | 12,140,039 | 6.6% | EDGAR |
| SC 13G | 2022-02-04 | WELLINGTON MANAGEMENT GROUP LLP | Seagen Inc. | 11,629,729 | 6.4% | EDGAR |
| SC 13G/A | 2022-02-01 | BlackRock Inc. | Seagen Inc. | 13,341,753 | 7.3% | EDGAR |
| SC 13D/A | 2021-05-18 | BAKER BROS. ADVISORS LP | Seagen Inc. | 47,370,508 | 26.1% | EDGAR |
| SC 13G | 2021-04-02 | Seagen Inc. | PIERIS PHARMACEUTICALS, INC. | 3,706,174 | 6.2% | EDGAR |
| SC 13G/A | 2021-02-16 | PRICE T ROWE ASSOCIATES INC /MD/ | Seagen Inc. | 7,526,240 | 4.1% | EDGAR |
| SC 13G/A | 2021-02-16 | Capital International Investors | Seagen Inc. | 19,872,894 | 11.0% | EDGAR |
| SC 13G/A | 2021-02-16 | Capital International Investors | Seagen Inc. | 19,872,894 | 11.0% | EDGAR |
| SC 13G/A | 2021-02-10 | VANGUARD GROUP INC | Seagen Inc. | 11,885,283 | 6.6% | EDGAR |