% of shares outstanding is not shown for TSLR: 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 TSLR 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 | JANE STREET GROUP, LLC | 60,96660,966 | $1M | — | TRIM -98% |
| 2 | Optiver Holding B.V. | 58,45558,455 | $1M | — | ADD 150% |
| 3 | UBS Group AG | 40,00040,000 | $826,800 | — | ADD 10711% |
| 4 | IMC-Chicago, LLC | 19,73419,734 | $407,902 | — | NEW |
| 5 | Secure Asset Management, LLC | 16,43216,432 | $339,649 | — | ADD 27% |
| 6 | Jump Financial, LLC | 15,38115,381 | $317,925 | — | NEW |
| 7 | HRT FINANCIAL LP | 12,82312,823 | $265,000 | — | NEW |
| 8 | StoneX Group Inc. | 12,16212,162 | $251,389 | — | NEW |
| 9 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 10,90710,907 | $225,448 | — | TRIM -90% |
| 10 | CITADEL ADVISORS LLC | 10,86410,864 | $224,559 | — | TRIM -30% |
| 11 | HOLLENCREST CAPITAL MANAGEMENT | 1,5001,500 | $31,005 | — | — |
| 12 | Chung Wu Investment Group, LLC | 650650 | $13,436 | — | — |
| 13 | SBI Securities Co., Ltd. | 295295 | $6,098 | — | TRIM -38% |
| 14 | Tower Research Capital LLC (TRC) | 264264 | $5,457 | — | ADD 252% |
| 15 | Benson Wealth Management INC | 167167 | $3,452 | — | TRIM -70% |
| 16 | OSAIC HOLDINGS, INC. | 6060 | $1,240 | — | — |
| 17 | SIMPLEX TRADING, LLC | 66 | $124 | — | TRIM -100% |
| 18 | CITIGROUP INC | 44 | $83 | — | NEW |
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 |
|---|---|---|---|---|---|---|---|
| JANE STREET GROUP, LLC | — | 91K | 18K | — | 3.0M | 61K | $1M |
| Optiver Holding B.V. | 20K | 89K | 43K | 26K | 23K | 58K | $1M |
| UBS Group AG | — | 8K | 391K | 71K | 370 | 40K | $826,800 |
| IMC-Chicago, LLC | — | — | — | 50K | — | 20K | $407,902 |
| Secure Asset Management, LLC | — | — | — | — | 13K | 16K | $339,649 |
| Jump Financial, LLC | — | — | 12K | 13K | — | 15K | $317,925 |
| HRT FINANCIAL LP | — | — | — | — | — | 13K | $265,000 |
| StoneX Group Inc. | — | — | — | — | — | 12K | $251,389 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 29K | 52K | 56K | 43K | 115K | 11K | $225,448 |
| CITADEL ADVISORS LLC | 14K | 36K | 48K | 17K | 16K | 11K | $224,559 |
| HOLLENCREST CAPITAL MANAGEMENT | 2K | 3K | 4K | 6K | 2K | 2K | $31,005 |
| Chung Wu Investment Group, LLC | — | — | 8K | 650 | 650 | 650 | $13,436 |
| SBI Securities Co., Ltd. | 583 | 2K | 1K | 363 | 476 | 295 | $6,098 |
| Tower Research Capital LLC (TRC) | 9 | 46 | 1K | — | 75 | 264 | $5,457 |
| Benson Wealth Management INC | — | — | — | — | 560 | 167 | $3,452 |
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 | 18 | 260,670 | — | $5M |
| 2025-Q4 | 18 | 3,196,669 | — | $102M |
| 2025-Q3 | 16 | 445,726 | — | $15M |
| 2025-Q2 | 13 | 749,738 | — | $14M |
| 2025-Q1 | 17 | 557,455 | — | $8M |
| 2024-Q4 | 12 | 229,409 | — | $10M |
| 2024-Q3 | 8 | 224,050 | — | $5M |
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 | |
|---|---|---|---|
| UBS Group AG | +39,630 | $819,152 | ADD |
| Optiver Holding B.V. | +35,051 | $724,504 | ADD |
| IMC-Chicago, LLC | +19,734 | $407,902 | OPEN |
| Jump Financial, LLC | +15,381 | $317,925 | OPEN |
| HRT FINANCIAL LP | +12,823 | $265,051 | OPEN |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| JANE STREET GROUP, LLC | −2,902,391 | $60M | TRIM |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | −103,867 | $2M | TRIM |
| SIMPLEX TRADING, LLC | −27,746 | $573,510 | TRIM |
| MORGAN STANLEY | −12,000 | $248,040 | CLOSE |
| TRUE Private Wealth Advisors | −8,098 | $167,386 | 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).
| 2024-Q2 | 5 | 144,013 | — | $2M |
| 2024-Q1 | 4 | 47,214 | — | $576,956 |
| 2023-Q4 | 1 | 19,447 | — | $501,927 |
| 2023-Q3 | 1 | 16,120 | — | $448,000 |
