% 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 SGSOY 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 | 61,83661,836 | $638,766 | — | — |
| 2 | GAMMA Investing LLC | 22,45222,452 | $231,929 | — | ADD 34% |
| 3 | Salomon & Ludwin, LLC | 911911 | $9,875 | — | — |
| 4 | PNC FINANCIAL SERVICES GROUP, INC. | 819819 | $8,460 | — | TRIM -2% |
| 5 | Ancora Advisors LLC | 122122 | $1,260 | — | — |
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 | 58K | 53K | 50K | 40K | 61K | 62K | $638,766 |
| GAMMA Investing LLC | 9K | 11K | 10K | 14K | 17K | 22K | $231,929 |
| Salomon & Ludwin, LLC | — | — | 14 | 911 | 911 | 911 | $9,875 |
| PNC FINANCIAL SERVICES GROUP, INC. | 757 | 739 | 750 | 878 | 836 | 819 | $8,460 |
| Ancora Advisors LLC | — | — | — | — | 122 | 122 | $1,260 |
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 | |
|---|---|---|---|
| GAMMA Investing LLC | +5,682 | $60,002 | ADD |
| RHUMBLINE ADVISERS | +1,072 | $11,320 | — |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| PNC FINANCIAL SERVICES GROUP, INC. | −17 | $180 | 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).
| Quarter | Holders | Shares held | % shares out | Value held |
|---|---|---|---|---|
| 2026-Q1 | 5 | 86,140 | — | $890,290 |
| 2025-Q4 | 5 | 79,403 | — | $904,713 |
| 2025-Q3 | 4 | 56,241 | — | $582,255 |
| 2025-Q2 | 5 | 60,187 | — | $606,695 |
| 2025-Q1 | 3 | 64,636 | — | $641,838 |
| 2024-Q4 | 3 | 67,099 | — | $665,628 |
| 2024-Q3 | 3 | 57,294 | — | $637,116 |
| 2024-Q2 | 3 | 50,084 | — | $442,748 |
| 2024-Q1 | 3 | 52,026 | — | $501,014 |
| 2023-Q4 | 4 | 46,965 | — | $402,787 |
| 2023-Q3 | 4 | 46,395 | — | $386,671 |
| 2023-Q2 | 6 | 47,531 | — | $432,969 |
| 2023-Q1 | 3 | 1,968 | — | $44,796 |
| 2022-Q4 | 3 | 1,848 | — | $43,125 |
| 2022-Q3 | 3 | 2,570 | — | $55,000 |
| 2022-Q2 | 5 | 30,897 | — | $706,000 |
| 2022-Q1 | 6 | 21,419 | — | $604,000 |
| 2021-Q4 | 4 | 18,472 | — | $622,000 |
| 2021-Q3 | 6 | 17,810 | — | $518,000 |
| 2021-Q2 | 8 | 17,500 | — | $542,000 |
| 2021-Q1 | 8 | 949,216 | — | $27M |
| 2020-Q4 | 8 | 941,507 | — | $28M |
| 2020-Q3 | 8 | 3,955,647 | — | $106M |
| 2020-Q2 | 7 | 944,426 | — | $23M |
| 2020-Q1 | 9 | 1,204,678 | — | $28M |
| 2019-Q4 | 9 | 1,207,635 | — | $33M |
| 2019-Q3 | 7 | 1,194,613 | — | $29M |
| 2019-Q2 | 10 | 1,191,025 | — | $30M |
| 2019-Q1 | 10 | 1,149,152 | — | $29M |
| 2018-Q4 | 6 | 1,109,459 | — | $25M |
| 2018-Q3 | 7 | 2,290,658 | — | $60M |
| 2018-Q2 | 7 | 2,275,897 | — | $60M |
| 2018-Q1 | 7 | 2,162,783 | — | $53M |
| 2017-Q4 | 6 | 2,073,539 | — | $54M |
| 2017-Q3 | 5 | 1,991,282 | — | $48M |
| 2017-Q2 | 6 | 1,994,268 | — | $48M |
| 2017-Q1 | 9 | 7,162,445 | — | $152M |
| 2016-Q4 | 11 | 7,096,728 | — | $144M |
| 2016-Q3 | 12 | 7,185,851 | — | $160M |
| 2016-Q2 | 9 | 2,116,357 | — | $48M |
| 2016-Q1 | 10 | 2,265,869 | — | $48M |
| 2015-Q4 | 7 | 2,213,731 | — | $42M |
| 2015-Q3 | 5 | 1,692,903 | — | $29M |
| 2015-Q2 | 5 | 2,102,715 | — | $38M |
| 2015-Q1 | 5 | 6,344,896 | — | $121M |
| 2014-Q4 | 3 | 3,097,217 | — | $63M |
| 2014-Q3 | 4 | 362,071 | — | $7M |
| 2014-Q2 | 5 | 3,423,027 | — | $82M |
| 2014-Q1 | 6 | 2,449,581 | — | $60M |
| 2013-Q4 | 7 | 2,587,575 | — | $59M |
| 2013-Q3 | 8 | 1,894,425 | — | $45M |
| 2013-Q2 | 7 | 2,110,639 | — | $46M |
| 2013-Q1 | 1 | 944,466 | — | $23M |
