% of shares outstanding not shown: this line files 20-F annual reports only — a foreign private issuer whose US listing trades as ADSs (depositary receipts), while its cover-page share count is in ORDINARY shares. The depositary ratio is not in our data. The count we hold for this line is 174,026,392 shares (as of 2025-12-31, source company_meta:diluted-was-fallback). Dividing one by the other is wrong by the whole ratio (a 5:1 ADR reads one fifth of the true percentage), so the percentage is withheld rather than served wrong. Holder share counts are shown as filed.
Crowding percentile withheld — no market cap for YI in the served universe — the cohort is size-matched, and an unmatched percentile would compare a micro-cap register to a mega-cap one.
| # | Holder | Shares | Value | % of shares out | Δ QoQ |
|---|---|---|---|---|---|
| 1 | Serenus Wealth Advisors, LLC | 4,3204,320 | $321,334 | — | — |
| 2 | RENAISSANCE TECHNOLOGIES LLC | 13,01413,014 | $84,851 | — | ADD 2% |
| 3 | CITIGROUP INC | 207207 | $1,341 | — | NEW |
| 4 | SBI Securities Co., Ltd. | 144144 | $939 | — | — |
| 5 | MORGAN STANLEY | 113113 | $737 | — | TRIM -19% |
| 6 | UBS Group AG | 100100 | $652 | — | TRIM -67% |
| 7 | JPMORGAN CHASE & CO | 5252 | $334 | — | ADD 24% |
| 8 | RHUMBLINE ADVISERS | 2222 | $142 | — | — |
Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.
| Holder | 2024-Q4 | 2025-Q1 | 2025-Q2 | 2025-Q3 | 2025-Q4 | 2026-Q1 | Latest value |
|---|---|---|---|---|---|---|---|
| Serenus Wealth Advisors, LLC | 5K | 5K | 5K | 4K | 4K | 4K | $321,334 |
| RENAISSANCE TECHNOLOGIES LLC | 133K | 13K | 13K | 13K | 13K | 13K | $84,851 |
| CITIGROUP INC | — | — | — | — | — | 207 | $1,341 |
| SBI Securities Co., Ltd. | 3K | 262 | 224 | 184 | 144 | 144 | $939 |
| MORGAN STANLEY | 52K | 5K | 5K | 5K | 140 | 113 | $737 |
| UBS Group AG | 2K | 1K | 6K | 1K | 303 | 100 | $652 |
| JPMORGAN CHASE & CO | 306K | 70 | 8 | 46 | 42 | 52 | $334 |
| RHUMBLINE ADVISERS | 10K | 22 | 22 | 22 | 22 | 22 | $142 |
Shares reported each quarter by the largest current holders. Green = added vs the prior filing, red = trimmed, grey = roughly held; a dash is a quarter with no 13F on file (a gap is skipped, not read as an exit). 13F is filed up to 45 days after quarter-end. Up to 40 quarters (10 years) available — use the selector above.
Holder count only — too few computable %-of-shares-outstanding quarters for a % pane. Line breaks are quarters with no 13F record, never interpolated.
Short interest has its own tab now — open SI →
Source: SEC Form 13F — every institution manager (≥ $100M in 13F securities) reporting a long US-listed position, across ~10,250 filers over 10 years of history. 13F is long-only, US-listed, filed up to 45 days after quarter-end.
| Biggest buyers | Δ shares | Δ value | |
|---|---|---|---|
| RENAISSANCE TECHNOLOGIES LLC | +300 | $1,956 | ADD |
| CITIGROUP INC | +207 | $1,350 | OPEN |
| JPMORGAN CHASE & CO | +10 | $65 | ADD |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | −31,947 | $208,294 | CLOSE |
| Parafestas Anastasios | −13,616 | $88,776 | CLOSE |
| UBS Group AG | −203 | $1,324 | TRIM |
| Serenus Wealth Advisors, LLC | −64 | $417 | — |
| MORGAN STANLEY | −27 | $176 | TRIM |
The 2025-Q4 register is as-filed in ITS OWN share basis; every count below was rebased into the 2026-Q1 basis (no split in between, factor 1). Dollar figures value the SHARE delta at one price — the 2026-03-31 close — rather than differencing two filings' own reported values, which would mix the quarter's price move into the trade figure.
13Fs disclose LONG US-listed positions only — shorts, most derivatives, bonds and non-US listings are invisible here, and a filer's quarter-over-quarter change is not necessarily a trade (index rebalances, in-kind transfers and entity successions all read as flow).
| Quarter | Holders | Shares held | % shares out | Value held |
|---|---|---|---|---|
| 2026-Q1 | 8 | 17,972 | — | $410,330 |
| 2025-Q4 | 9 | 63,312 | — | $431,438 |
| 2025-Q3 | 8 | 54,226 | — | $540,905 |
| 2025-Q2 | 9 | 55,217 | — | $660,984 |
| 2025-Q1 | 9 | 45,686 | — | $625,871 |
| 2024-Q4 | 20 | 3,077,157 | — | $2M |
| 2024-Q3 | 9 | 321,016 | — | $242,326 |
| 2024-Q2 | 15 | 2,780,594 | — | $3M |
| 2024-Q1 | 16 | 2,697,062 | — | $3M |
| 2023-Q4 | 17 | 2,712,696 | — | $4M |
| 2023-Q3 | 14 | 1,922,319 | — | $5M |
| 2023-Q2 | 13 | 1,818,389 | — | $5M |
| 2023-Q1 | 16 | 1,879,892 | — | $5M |
| 2022-Q4 | 17 | 2,038,448 | — | $6M |
| 2022-Q3 | 16 | 3,299,004 | — | $9M |
| 2022-Q2 | 15 | 3,365,876 | — | $7M |
| 2022-Q1 | 19 | 3,577,485 | — | $10M |
| 2021-Q4 | 23 | 4,187,428 | — | $15M |
| 2021-Q3 | 23 | 3,927,140 | — | $24M |
| 2021-Q2 | 29 | 5,561,492 | — | $51M |
| 2021-Q1 | 33 | 5,081,215 | — | $70M |
| 2020-Q4 | 21 | 2,892,381 | — | $20M |
| 2020-Q3 | 23 | 2,972,273 | — | $18M |
| 2020-Q2 | 24 | 3,145,889 | — | $20M |
| 2020-Q1 | 13 | 2,585,921 | — | $17M |
| 2019-Q4 | 8 | 2,170,034 | — | $15M |
| 2019-Q3 | 10 | 2,378,679 | — | $12M |
| 2019-Q2 | 9 | 3,273,334 | — | $18M |
| 2019-Q1 | 10 | 3,203,155 | — | $21M |
| 2018-Q4 | 8 | 3,287,778 | — | $20M |
| 2018-Q3 | 11 | 3,456,734 | — | $47M |
