% of shares outstanding not shown: no SEC cover-page share count falls within 120 days of the 2026-Q1 quarter end, so any percentage would rest on a count that cannot speak for this quarter. Holder share counts are shown as filed.
Crowding percentile withheld — no market cap for STRR in the served universe — the cohort is size-matched, and an unmatched percentile would compare a micro-cap register to a mega-cap one.
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 |
|---|---|---|---|---|---|---|---|
| Mink Brook Asset Management LLC | 261K | 265K | 274K | 314K | 314K | 316K | $3M |
| VANGUARD CAPITAL MANAGEMENT LLC | — | — | — | — | — | 135K | $1M |
| Cable Car Capital, LP | — | — | — | — | 57K | 100K | $1M |
| RENAISSANCE TECHNOLOGIES LLC | 70K | 69K | 72K | 85K | 79K | 81K | $831,919 |
| North Star Investment Management Corp. | — | — | — | — | — | 55K | $565,400 |
| BlackRock, Inc. | 59K | 59K | 53K | 53K | 53K | 53K | $548,993 |
| DIMENSIONAL FUND ADVISORS LP | 72K | 72K | 72K | 68K | 56K | 42K | $430,341 |
| RBF Capital, LLC | 28K | 28K | 28K | 28K | 56K | 28K | $288,991 |
| Manatuck Hill Partners, LLC | 60K | 60K | 59K | 43K | 32K | 27K | $272,420 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 22K | 22K | 22K | 25K | 25K | 25K | $252,014 |
| GEODE CAPITAL MANAGEMENT, LLC | 26K | 27K | 27K | 31K | 31K | 24K | $250,759 |
| VANGUARD FIDUCIARY TRUST CO | — | — | — | — | — | 18K | $183,899 |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | 327K | 319K | 294K | 12K | 12K | 12K | $122,538 |
| Rothschild Wealth LLC | — | — | — | — | 66K | 11K | $116,164 |
| CWM, LLC | — | — | — | — | — | 2K | $21,794 |
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 | |
|---|---|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC | +134,685 | — | OPEN |
| North Star Investment Management Corp. | +55,000 | — | OPEN |
| Cable Car Capital, LP | +42,752 | — | ADD |
| VANGUARD FIDUCIARY TRUST CO | +17,889 | — | OPEN |
| RENAISSANCE TECHNOLOGIES LLC | +2,200 | — | ADD |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| VANGUARD GROUP INC | −153,630 | — | CLOSE |
| Perritt Capital Management Inc | −66,300 | — | CLOSE |
| Rothschild Wealth LLC | −55,000 | — | TRIM |
| RBF Capital, LLC | −28,112 | — | TRIM |
| DRW Securities, LLC | −23,860 | — | 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 quarter-end close — rather than differencing two filings' own reported values, which would mix the quarter's price move into the trade figure. No licensed quarter-end close is stored for this line, so the dollar columns are withheld; share counts stand.
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 | 25 | 930,944 | — | $10M |
| 2025-Q4 | 23 | 1,039,333 | — | $12M |
| 2025-Q3 | 23 | 1,006,915 | — | $11M |
| 2025-Q2 | 22 | 1,333,959 | — | $11M |
| 2025-Q1 | 21 | 1,416,300 | — | $15M |
| 2024-Q4 | 25 | 1,439,680 | — | $19M |
| 2024-Q3 | 22 | 1,177,128 | — | $19M |
| 2024-Q2 | 24 | 1,159,388 | — | $19M |
| 2024-Q1 | 27 | 1,205,976 | — | $21M |
| 2023-Q4 | 28 | 1,329,130 | — | $21M |
| 2023-Q3 | 27 | 1,354,526 | — | $26M |
| 2023-Q2 | 27 | 1,377,308 | — | $30M |
| 2023-Q1 | 29 | 1,398,033 | — | $31M |
| 2022-Q4 | 28 | 1,412,108 | — | $30M |
| 2022-Q3 | 26 | 1,463,464 | — | $49M |
| 2022-Q2 | 31 | 1,507,021 | — | $47M |
| 2022-Q1 | 27 | 1,531,146 | — | $62M |
| 2021-Q4 | 23 | 1,507,666 | — | $44M |
| 2021-Q3 | 21 | 1,389,976 | — | $22M |
| 2021-Q2 | 22 | 1,339,838 | — | $24M |
| 2021-Q1 | 22 | 1,372,100 | — | $23M |
| 2020-Q4 | 21 | 1,348,906 | — | $14M |
| 2020-Q3 | 21 | 1,310,218 | — | $13M |
| 2020-Q2 | 23 | 1,333,296 | — | $12M |
| 2020-Q1 | 23 | 1,414,504 | — | $12M |
| 2019-Q4 | 24 | 1,701,834 | — | $20M |
| 2019-Q3 | 26 | 1,677,423 | — | $21M |
| 2019-Q2 | 22 | 1,680,958 | — | $21M |
