% 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 ALPIB 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 | BANC FUNDS CO LLC | 204,321204,321 | $10M | — | TRIM -14% |
| 2 | Siena Capital Partners GP, LLC | 143,174143,174 | $7M | — | — |
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 |
|---|---|---|---|---|---|---|---|
| BANC FUNDS CO LLC | 344K | 322K | 315K | 275K | 237K | 204K | $10M |
| Siena Capital Partners GP, LLC | 128K | 128K | 128K | 143K | 143K | 143K | $7M |
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 | |
|---|---|---|---|
| No filer increased its position this quarter. | |||
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| BANC FUNDS CO LLC | −32,994 | $2M | 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 | 2 | 347,495 | — | $17M |
| 2025-Q4 | 2 | 380,489 | — | $15M |
| 2025-Q3 | 2 | 418,372 | — | $13M |
| 2025-Q2 | 2 | 443,512 | — | $12M |
| 2025-Q1 | 2 | 450,672 | — | $14M |
| 2024-Q4 | 2 | 472,664 | — | $16M |
| 2024-Q3 | 3 | 497,213 | — | $15M |
| 2024-Q2 | 2 | 484,140 | — | $13M |
| 2024-Q1 | 2 | 545,345 | — | $15M |
| 2023-Q4 | 2 | 593,527 | — | $17M |
| 2023-Q3 | 2 | 593,527 | — | $16M |
| 2023-Q2 | 2 | 593,527 | — | $16M |
| 2023-Q1 | 2 | 593,527 | — | $18M |
| 2022-Q4 | 2 | 564,227 | — | $18M |
| 2022-Q3 | 2 | 549,227 | — | $17M |
| 2022-Q2 | 1 | 57,999 | — | $2M |
| 2022-Q1 | 1 | 57,999 | — | $2M |
| 2021-Q4 | 1 | 57,999 | — | $2M |
| 2021-Q3 | 1 | 57,999 | — | $2M |
| 2021-Q2 | 1 | 50,732 | — | $2M |
| 2021-Q1 | 1 | 37,500 | — | $1M |
| 2020-Q4 | 2 | 58,050 | — | $2M |
| 2020-Q3 | 1 | 210 | — | $756,000 |
| 2020-Q2 | 1 | 173 | — | $554,000 |
| 2020-Q1 | 1 | 173 | — | $590,000 |
| 2019-Q4 | 1 | 130 | — | $644,000 |
| 2019-Q3 | 1 | 15 | — | $75,000 |
