OARK additions & removals
Changes are observation-bounded: an addition is the first retained official snapshot containing a security after an earlier absence; a removal is its first retained absence. Baseline holdings receive no invented addition date.
Additions
| Ticker | Issuer | Observed date | Change |
|---|
| TREASURY BILL | TREASURY BILL | 2026-04-30 | Added / first present |
|---|
| TREASURY BILL | TREASURY BILL | 2026-01-31 | Added / first present |
|---|
| TREASURY BILL | TREASURY BILL | 2026-01-31 | Added / first present |
|---|
| ARKK 3 C80 | N/A | 2026-01-31 | Added / first present |
|---|
| ARKK 2 C81.5 | N/A | 2026-01-31 | Added / first present |
|---|
| ARKK 2 C81 | N/A | 2026-01-31 | Added / first present |
|---|
| ARKK 2 C83.5 | N/A | 2026-01-31 | Added / first present |
|---|
| ARKK 1 C85.5 | N/A | 2026-01-31 | Added / first present |
|---|
| ARKK 1 C83 | N/A | 2026-01-31 | Added / first present |
|---|
| ARKK 2 C80.5 | N/A | 2026-01-31 | Added / first present |
|---|
| ARKK 2 C79 | N/A | 2026-01-31 | Added / first present |
|---|
| ARKK 2 C78.5 | N/A | 2026-01-31 | Added / first present |
|---|
| TREASURY BILL | TREASURY BILL | 2025-10-31 | Added / first present |
|---|
| TREASURY BILL | TREASURY BILL | 2025-10-31 | Added / first present |
|---|
| ARKK 11 C80 | N/A | 2025-10-31 | Added / first present |
|---|
| ARKK 11 C93 | N/A | 2025-10-31 | Added / first present |
|---|
| ARKK 11 C91 | N/A | 2025-10-31 | Added / first present |
|---|
| ARKK 11 C94 | N/A | 2025-10-31 | Added / first present |
|---|
| ARKK 10 C94 | N/A | 2025-10-31 | Added / first present |
|---|
| ARKK 10 C90 | N/A | 2025-10-31 | Added / first present |
|---|
| ARKK 11 C88 | N/A | 2025-10-31 | Added / first present |
|---|
| ARKK 11 C90 | N/A | 2025-10-31 | Added / first present |
|---|
| ARKK 11 C89 | N/A | 2025-10-31 | Added / first present |
|---|
| TREASURY BILL | TREASURY BILL | 2025-07-31 | Added / first present |
|---|
| TREASURY BILL | TREASURY BILL | 2025-07-31 | Added / first present |
|---|
| TREASURY BILL | TREASURY BILL | 2025-07-31 | Added / first present |
|---|
| ARKK 9 C70 | N/A | 2025-07-31 | Added / first present |
|---|
| ARKK 8 C80.5 | N/A | 2025-07-31 | Added / first present |
|---|
| ARKK 8 C79.5 | N/A | 2025-07-31 | Added / first present |
|---|
| ARKK 8 C80 | N/A | 2025-07-31 | Added / first present |
|---|
| ARKK 8 C78 | N/A | 2025-07-31 | Added / first present |
|---|
| ARKK 8 C77.5 | N/A | 2025-07-31 | Added / first present |
|---|
| ARKK 8 C77 | N/A | 2025-07-31 | Added / first present |
|---|
| US TREASURY N/B | US TREASURY N/B | 2025-04-30 | Added / first present |
|---|
| TREASURY BILL | TREASURY BILL | 2025-04-30 | Added / first present |
|---|
| TREASURY BILL | TREASURY BILL | 2025-04-30 | Added / first present |
|---|
| ARKK 5 C47 | N/A | 2025-04-30 | Added / first present |
|---|
| ARKK 5 C53.5 | N/A | 2025-04-30 | Added / first present |
|---|
| ARKK 5 C51 | N/A | 2025-04-30 | Added / first present |
|---|
| TREASURY BILL | TREASURY BILL | 2025-01-31 | Added / first present |
|---|
| TREASURY BILL | TREASURY BILL | 2025-01-31 | Added / first present |
|---|
| ARKK 3 C57 | N/A | 2025-01-31 | Added / first present |
|---|
| ARKK 1 C67 | N/A | 2025-01-31 | Added / first present |
|---|
| ARKK 1 C67.5 | N/A | 2025-01-31 | Added / first present |
|---|
| ARKK 1 C64.5 | N/A | 2025-01-31 | Added / first present |
|---|
| ARKK 12 C45 | N/A | 2024-10-31 | Added / first present |
|---|
| ARKK 11 C53 | N/A | 2024-10-31 | Added / first present |
|---|
| ARKK 11 C50 | N/A | 2024-10-31 | Added / first present |
|---|
| US TREASURY N/B | US TREASURY N/B | 2024-07-31 | Added / first present |
|---|
| US TREASURY N/B | US TREASURY N/B | 2024-07-31 | Added / first present |
|---|
| ARKK 9 C45 | N/A | 2024-07-31 | Added / first present |
|---|
| ARKK 8 C47.5 | N/A | 2024-07-31 | Added / first present |
|---|
| US TREASURY N/B | US TREASURY N/B | 2024-04-30 | Added / first present |
|---|
| ARKK 5 C50 | N/A | 2024-04-30 | Added / first present |
|---|
| ARKK 5 C45 | N/A | 2024-04-30 | Added / first present |
|---|
Removals
| Ticker | Issuer | Observed date | Change |
|---|
| ARKK 3 C80 | N/A | 2026-04-30 | Removed / first absent |
|---|
| ARKK 2 C81.5 | N/A | 2026-04-30 | Removed / first absent |
|---|
| ARKK 2 C81 | N/A | 2026-04-30 | Removed / first absent |
|---|
| ARKK 2 C83.5 | N/A | 2026-04-30 | Removed / first absent |
|---|
| ARKK 1 C85.5 | N/A | 2026-04-30 | Removed / first absent |
|---|
| ARKK 1 C83 | N/A | 2026-04-30 | Removed / first absent |
|---|
| ARKK 2 C80.5 | N/A | 2026-04-30 | Removed / first absent |
|---|
| ARKK 2 C79 | N/A | 2026-04-30 | Removed / first absent |
|---|
| ARKK 2 C78.5 | N/A | 2026-04-30 | Removed / first absent |
|---|
| TREASURY BILL | TREASURY BILL | 2026-04-30 | Removed / first absent |
|---|
| ARKK 11 C80 | N/A | 2026-01-31 | Removed / first absent |
|---|
| ARKK 11 C93 | N/A | 2026-01-31 | Removed / first absent |
|---|
| ARKK 11 C91 | N/A | 2026-01-31 | Removed / first absent |
|---|
| ARKK 11 C94 | N/A | 2026-01-31 | Removed / first absent |
|---|
| ARKK 10 C94 | N/A | 2026-01-31 | Removed / first absent |
|---|
| ARKK 10 C90 | N/A | 2026-01-31 | Removed / first absent |
|---|
| ARKK 11 C88 | N/A | 2026-01-31 | Removed / first absent |
|---|
| ARKK 11 C90 | N/A | 2026-01-31 | Removed / first absent |
|---|
| ARKK 11 C89 | N/A | 2026-01-31 | Removed / first absent |
|---|
| TREASURY BILL | TREASURY BILL | 2026-04-30 | Removed / first absent |
|---|
| TREASURY BILL | TREASURY BILL | 2026-01-31 | Removed / first absent |
|---|
| ARKK 9 C70 | N/A | 2025-10-31 | Removed / first absent |
|---|
| ARKK 8 C80.5 | N/A | 2025-10-31 | Removed / first absent |
|---|
| ARKK 8 C79.5 | N/A | 2025-10-31 | Removed / first absent |
|---|
| ARKK 8 C80 | N/A | 2025-10-31 | Removed / first absent |
|---|
| ARKK 8 C78 | N/A | 2025-10-31 | Removed / first absent |
|---|
| ARKK 8 C77.5 | N/A | 2025-10-31 | Removed / first absent |
|---|
| ARKK 8 C77 | N/A | 2025-10-31 | Removed / first absent |
|---|
| US TREASURY N/B | US TREASURY N/B | 2025-10-31 | Removed / first absent |
|---|
| TREASURY BILL | TREASURY BILL | 2025-07-31 | Removed / first absent |
|---|
| TREASURY BILL | TREASURY BILL | 2025-10-31 | Removed / first absent |
|---|
| ARKK 5 C47 | N/A | 2025-07-31 | Removed / first absent |
|---|
| ARKK 5 C53.5 | N/A | 2025-07-31 | Removed / first absent |
|---|
| ARKK 5 C51 | N/A | 2025-07-31 | Removed / first absent |
|---|
| TREASURY BILL | TREASURY BILL | 2025-04-30 | Removed / first absent |
|---|
| TREASURY BILL | TREASURY BILL | 2025-04-30 | Removed / first absent |
|---|
| ARKK 3 C57 | N/A | 2025-04-30 | Removed / first absent |
|---|
| ARKK 1 C67 | N/A | 2025-04-30 | Removed / first absent |
|---|
| ARKK 1 C67.5 | N/A | 2025-04-30 | Removed / first absent |
|---|
| ARKK 1 C64.5 | N/A | 2025-04-30 | Removed / first absent |
|---|
| ARKK 12 C45 | N/A | 2025-01-31 | Removed / first absent |
|---|
| ARKK 11 C53 | N/A | 2025-01-31 | Removed / first absent |
|---|
| ARKK 11 C50 | N/A | 2025-01-31 | Removed / first absent |
|---|
| US TREASURY N/B | US TREASURY N/B | 2025-07-31 | Removed / first absent |
|---|
| US TREASURY N/B | US TREASURY N/B | 2026-01-31 | Removed / first absent |
|---|
| ARKK 9 C45 | N/A | 2024-10-31 | Removed / first absent |
|---|
| ARKK 8 C47.5 | N/A | 2024-10-31 | Removed / first absent |
|---|
| US TREASURY N/B | US TREASURY N/B | 2025-04-30 | Removed / first absent |
|---|
| ARKK 5 C50 | N/A | 2024-07-31 | Removed / first absent |
|---|
| ARKK 5 C45 | N/A | 2024-07-31 | Removed / first absent |
|---|
| US TREASURY N/B | US TREASURY N/B | 2025-01-31 | Removed / first absent |
|---|
| TREASURY BILL | TREASURY BILL | 2024-07-31 | Removed / first absent |
|---|
| ARKK 3 C45 | N/A | 2024-04-30 | Removed / first absent |
|---|
| ARKK 2 C48 | N/A | 2024-04-30 | Removed / first absent |
|---|
| ARKK 2 C47.5 | N/A | 2024-04-30 | Removed / first absent |
|---|