% of shares outstanding is not shown for YCS: this is a fund line, and we hold no cover-page share count for it at any quarter — a fund's shares outstanding move with creations and redemptions rather than with issuance and buybacks, and it is not the SEC cover-page count this percentage is defined against. The figure is withheld rather than computed against a count that does not exist. Holder share counts are shown as filed.
Crowding percentile withheld — no market cap for YCS 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 | NKCFO LLC | 63,75063,750 | $3M | — | TRIM -26% |
| 2 | CITADEL ADVISORS LLC | 24,20124,201 | $1M | — | TRIM -10% |
| 3 | JANE STREET GROUP, LLC | 13,34313,343 | $706,912 | — | ADD 20% |
| 4 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 4,0004,000 | $211,920 | — | NEW |
| 5 | MORGAN STANLEY | 200200 | $10,596 | — | — |
| 6 | OSAIC HOLDINGS, INC. | 11 | $53 | — | — |
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 |
|---|---|---|---|---|---|---|---|
| NKCFO LLC | 103K | 77K | — | 22K | 86K | 64K | $3M |
| CITADEL ADVISORS LLC | 16K | 65K | 76K | 76K | 27K | 24K | $1M |
| JANE STREET GROUP, LLC | 8K | 37K | — | — | 11K | 13K | $706,912 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 7K | 45K | 23K | — | — | 4K | $211,920 |
| MORGAN STANLEY | 200 | 374 | 359 | 200 | 200 | 200 | $10,596 |
| OSAIC HOLDINGS, INC. | — | — | — | — | 1 | 1 | $53 |
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 | |
|---|---|---|---|
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | +4,000 | $211,920 | OPEN |
| JANE STREET GROUP, LLC | +2,223 | $117,775 | ADD |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| NKCFO LLC | −22,575 | $1M | TRIM |
| CITADEL ADVISORS LLC | −2,708 | $143,470 | TRIM |
| UBS Group AG | −794 | $42,066 | CLOSE |
| Estate Planners Group, LLC | −472 | $25,007 | CLOSE |
| SIMPLEX TRADING, LLC | −79 | $4,185 | CLOSE |
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 | 6 | 105,495 | — | $6M |
| 2025-Q4 | 8 | 125,900 | — | $6M |
| 2025-Q3 | 7 | 171,710 | — | $8M |
| 2025-Q2 | 5 | 98,805 | — | $4M |
| 2025-Q1 | 6 | 224,951 | — | $10M |
| 2024-Q4 | 8 | 136,834 | — | $6M |
| 2024-Q3 | 8 | 204,587 | — | $16M |
| 2024-Q2 | 9 | 151,233 | — | $14M |
| 2024-Q1 | 5 | 110,672 | — | $9M |
| 2023-Q4 | 7 | 58,161 | — | $4M |
| 2023-Q3 | 8 | 15,581 | — | $1M |
| 2023-Q2 | 7 | 20,342 | — | $1M |
| 2023-Q1 | 8 | 60,749 | — | $3M |
| 2022-Q4 | 10 | 40,984 | — | $2M |
| 2022-Q3 | 11 | 130,038 | — | $8M |
| 2022-Q2 | 11 | 138,498 | — | $8M |
| 2022-Q1 | 4 | 67,033 | — | $6M |
| 2021-Q4 | 4 | 68,726 | — | $6M |
| 2021-Q3 | 5 | 71,520 | — | $6M |
| 2021-Q2 | 5 | 70,455 | — | $5M |
| 2021-Q1 | 6 | 35,501 | — | $3M |
| 2020-Q4 | 8 | 39,664 | — | $3M |
| 2020-Q3 | 7 | 24,286 | — | $2M |
| 2020-Q2 | 9 | 44,883 | — | $3M |
| 2020-Q1 | 7 | 33,632 | — | $2M |
| 2019-Q4 | 11 | 76,886 | — | $6M |
| 2019-Q3 | 11 | 80,236 | — | $6M |
| 2019-Q2 | 13 | 118,446 | — | $9M |
| 2019-Q1 | 12 | 94,794 | — | $7M |
| 2018-Q4 | 14 | 92,598 | — | $7M |
| 2018-Q3 | 13 | 90,971 | — | $7M |
| 2018-Q2 | 15 | 72,918 | — | $5M |
| 2018-Q1 | 13 | 91,497 | — | $6M |
| 2017-Q4 | 14 | 138,571 | — | $10M |
| 2017-Q3 | 18 | 123,009 | — | $9M |
| 2017-Q2 | 23 | 121,437 | — | $9M |
| 2017-Q1 | 25 | 193,350 | — | $14M |
| 2016-Q4 | 29 | 208,227 | — | $17M |
| 2016-Q3 | 25 | 315,111 | — | $19M |
| 2016-Q2 | 21 | 186,056 | — | $12M |
| 2016-Q1 | 25 | 172,841 | — | $13M |
| 2015-Q4 | 33 | 283,519 | — | $25M |
| 2015-Q3 | 34 | 476,915 | — | $42M |
| 2015-Q2 | 34 | 443,432 | — | $41M |
| 2015-Q1 | 39 | 515,410 | — | $46M |
| 2014-Q4 | 37 | 387,546 | — | $34M |
| 2014-Q3 | 33 | 504,723 | — | $38M |
| 2014-Q2 | 36 | 736,673 | — | $48M |
| 2014-Q1 | 34 | 950,103 | — | $64M |
| 2013-Q4 | 41 | 878,164 | — | $62M |
| 2013-Q3 | 39 | 755,937 | — | $47M |
| 2013-Q2 | 37 | 813,385 | — | $52M |
| 2013-Q1 | 4 | 10,283 | — | $594,000 |
