% of shares outstanding is not shown for TSDD: 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 TSDD 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 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 168,488168,488 | $2M | — | ADD 67% |
| 2 | IMC-Chicago, LLC | 126,083126,083 | $1M | — | ADD 58% |
| 3 | CITADEL ADVISORS LLC | 109,837109,837 | $1M | — | NEW |
| 4 | Marex Group plc | 90,60690,606 | $945,927 | — | NEW |
| 5 | JANE STREET GROUP, LLC | 73,12873,128 | $763,457 | — | NEW |
| 6 | Jump Financial, LLC | 64,76264,762 | $676,116 | — | TRIM -29% |
| 7 | StoneX Group Inc. | 61,91261,912 | $646,361 | — | ADD 50% |
| 8 | Headlands Technologies LLC | 55,80055,800 | $582,552 | — | TRIM -4% |
| 9 | CANTOR FITZGERALD, L. P. | 47,26447,264 | $493,436 | — | NEW |
| 10 | XTX Topco Ltd | 26,56826,568 | $277,370 | — | TRIM -47% |
| 11 | Optiver Holding B.V. | 24,20324,203 | $252,679 | — | ADD 8% |
| 12 | CITIGROUP INC | 18,50618,506 | $193,203 | — | ADD 462550% |
| 13 | COLDSTREAM CAPITAL MANAGEMENT INC | 10,00010,000 | $104,400 | — | NEW |
| 14 | SG Americas Securities, LLC | 10,00010,000 | $104,000 | — | — |
| 15 | GROUP ONE TRADING LLC | 3,8563,856 | $40,257 | — | NEW |
| 16 | BANK OF MONTREAL /CAN/ | 1,0001,000 | $10,440 | — | NEW |
| 17 | SBI Securities Co., Ltd. | 813813 | $8,488 | — | TRIM -27% |
| 18 | SIMPLEX TRADING, LLC | 749749 | $7,819 | — | NEW |
| 19 | UBS Group AG | 299299 | $3,122 | — | TRIM -56% |
| 20 | MAI Capital Management | 215215 | $2,245 | — | NEW |
| 21 | Tower Research Capital LLC (TRC) | 100100 | $1,044 | — | TRIM -87% |
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 |
|---|---|---|---|---|---|---|---|
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | — | 37K | 62K | 16K | 101K | 168K | $2M |
| IMC-Chicago, LLC | — | — | 22K | — | 80K | 126K | $1M |
| CITADEL ADVISORS LLC | — | — | 36K | — | — | 110K | $1M |
| Marex Group plc | — | — | — | — | — | 91K | $945,927 |
| JANE STREET GROUP, LLC | — | — | 16K | — | — | 73K | $763,457 |
| Jump Financial, LLC | — | — | 22K | 70K | 91K | 65K | $676,116 |
| StoneX Group Inc. | — | — | 19K | — | 41K | 62K | $646,361 |
| Headlands Technologies LLC | — | 9 | — | — | 58K | 56K | $582,552 |
| CANTOR FITZGERALD, L. P. | — | — | — | — | — | 47K | $493,436 |
| XTX Topco Ltd | — | — | — | — | 50K | 27K | $277,370 |
| Optiver Holding B.V. | — | 3K | 7K | 19K | 22K | 24K | $252,679 |
| CITIGROUP INC | — | — | — | 1 | 4 | 19K | $193,203 |
| COLDSTREAM CAPITAL MANAGEMENT INC | — | — | — | — | — | 10K | $104,400 |
| SG Americas Securities, LLC | — | 30K | 10K | 10K | 10K | 10K | $104,000 |
| GROUP ONE TRADING LLC | — | 56 | 394 | 2K | — | 4K | $40,257 |
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.
| Quarter | Holders | Shares held | % shares out | Value held |
|---|---|---|---|---|
| 2026-Q1 | 21 | 894,189 | — | $9M |
| 2025-Q4 | 17 | 683,317 | — | $5M |
| 2025-Q3 | 11 | 139,352 | — | $1M |
| 2025-Q2 | 17 | 251,726 | — | $6M |
| 2025-Q1 | 10 | 72,539 | — | $4M |
| 2024-Q4 | 1 | 84,152 | — | $141,375 |
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 | |
|---|---|---|---|
| CITADEL ADVISORS LLC | +109,837 | $1M | OPEN |
| Marex Group plc | +90,606 | $945,927 | OPEN |
| JANE STREET GROUP, LLC | +73,128 | $763,456 | OPEN |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | +67,397 | $703,625 | ADD |
| CANTOR FITZGERALD, L. P. | +47,264 | $493,436 | OPEN |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| HRT FINANCIAL LP | −106,402 | $1M | CLOSE |
| RENAISSANCE TECHNOLOGIES LLC | −71,700 | $748,548 | CLOSE |
| GTS SECURITIES LLC | −31,101 | $324,694 | CLOSE |
| Jump Financial, LLC | −26,048 | $271,941 | TRIM |
| XTX Topco Ltd | −23,703 | $247,459 | 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).
