% 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 SONVY 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 | RHUMBLINE ADVISERS | 19,10419,104 | $863,513 | — | ADD 8% |
| 2 | Sterling Capital Management LLC | 6,2516,251 | $278,496 | — | TRIM -10% |
| 3 | PNC FINANCIAL SERVICES GROUP, INC. | 1,8481,848 | $83,530 | — | — |
| 4 | GAMMA Investing LLC | 1,3521,352 | $61,110 | — | TRIM -5% |
| 5 | Ancora Advisors LLC | 182182 | $8,226 | — | — |
| 6 | HANTZ FINANCIAL SERVICES, INC. | 123123 | $6,000 | — | — |
| 7 | IMA Advisory Services, Inc. | 1616 | $723 | — | ADD 14% |
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 |
|---|---|---|---|---|---|---|---|
| RHUMBLINE ADVISERS | 11K | 12K | 11K | 11K | 18K | 19K | $863,513 |
| Sterling Capital Management LLC | 8K | 8K | 8K | 7K | 7K | 6K | $278,496 |
| PNC FINANCIAL SERVICES GROUP, INC. | 2K | 2K | 2K | 2K | 2K | 2K | $83,530 |
| GAMMA Investing LLC | 934 | 843 | 1K | 1K | 1K | 1K | $61,110 |
| Ancora Advisors LLC | — | — | — | — | 182 | 182 | $8,226 |
| HANTZ FINANCIAL SERVICES, INC. | — | 123 | 123 | 123 | 123 | 123 | $6,000 |
| IMA Advisory Services, Inc. | — | — | — | — | 14 | 16 | $723 |
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 | |
|---|---|---|---|
| RHUMBLINE ADVISERS | +1,446 | $65,359 | ADD |
| IMA Advisory Services, Inc. | +2 | $90 | ADD |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| Sterling Capital Management LLC | −680 | $30,736 | TRIM |
| Salomon & Ludwin, LLC | −146 | $6,599 | CLOSE |
| GAMMA Investing LLC | −65 | $2,938 | TRIM |
| Signature Equity Partners, LLC | −25 | $1,130 | CLOSE |
| PNC FINANCIAL SERVICES GROUP, INC. | −14 | $633 | — |
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 | 7 | 28,876 | — | $1M |
| 2025-Q4 | 9 | 28,358 | — | $1M |
| 2025-Q3 | 7 | 26,584 | — | $1M |
| 2025-Q2 | 8 | 22,789 | — | $1M |
| 2025-Q1 | 7 | 23,599 | — | $1M |
| 2024-Q4 | 6 | 22,159 | — | $1M |
| 2024-Q3 | 8 | 31,890 | — | $2M |
| 2024-Q2 | 5 | 20,476 | — | $835,611 |
| 2024-Q1 | 7 | 21,138 | — | $752,989 |
| 2023-Q4 | 7 | 20,287 | — | $783,930 |
| 2023-Q3 | 6 | 34,810 | — | $511,098 |
| 2023-Q2 | 5 | 36,922 | — | $566,995 |
| 2023-Q1 | 6 | 30,806 | — | $234,841 |
| 2022-Q4 | 5 | 30,555 | — | $1M |
| 2022-Q3 | 5 | 30,314 | — | $1M |
| 2022-Q2 | 7 | 41,402 | — | $3M |
| 2022-Q1 | 8 | 27,101 | — | $2M |
| 2021-Q4 | 7 | 25,326 | — | $2M |
| 2021-Q3 | 9 | 29,079 | — | $2M |
| 2021-Q2 | 9 | 28,237 | — | $2M |
| 2021-Q1 | 10 | 711,934 | — | $38M |
| 2020-Q4 | 8 | 686,590 | — | $36M |
| 2020-Q3 | 8 | 3,599,248 | — | $183M |
| 2020-Q2 | 8 | 768,281 | — | $31M |
| 2020-Q1 | 11 | 827,886 | — | $30M |
| 2019-Q4 | 10 | 868,078 | — | $40M |
| 2019-Q3 | 9 | 844,452 | — | $39M |
| 2019-Q2 | 10 | 814,862 | — | $37M |
| 2019-Q1 | 10 | 819,333 | — | $32M |
| 2018-Q4 | 8 | 805,879 | — | $26M |
| 2018-Q3 | 8 | 712,965 | — | $28M |
| 2018-Q2 | 8 | 705,517 | — | $25M |
| 2018-Q1 | 7 | 741,710 | — | $24M |
| 2017-Q4 | 6 | 626,996 | — | $20M |
| 2017-Q3 | 4 | 502,358 | — | $17M |
| 2017-Q2 | 4 | 453,094 | — | $15M |
| 2017-Q1 | 4 | 403,339 | — | $11M |
| 2016-Q4 | 5 | 632,916 | — | $15M |
| 2016-Q3 | 7 | 418,895 | — | $12M |
| 2016-Q2 | 6 | 376,141 | — | $10M |
| 2016-Q1 | 6 | 450,151 | — | $11M |
| 2015-Q4 | 4 | 256,748 | — | $6M |
| 2015-Q3 | 3 | 24,330 | — | $623,000 |
| 2015-Q2 | 4 | 255,511 | — | $7M |
| 2015-Q1 | 5 | 230,181 | — | $6M |
| 2014-Q4 | 3 | 229,524 | — | $7M |
| 2014-Q3 | 4 | 207,643 | — | $7M |
| 2014-Q2 | 4 | 201,975 | — | $6M |
| 2014-Q1 | 6 | 236,387 | — | $7M |
| 2013-Q4 | 7 | 220,603 | — | $6M |
| 2013-Q3 | 9 | 267,078 | — | $7M |
| 2013-Q2 | 7 | 217,638 | — | $5M |
