% 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 AMCI 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 | Harraden Circle Investments, LLC | 141,019141,019 | $769,259 | — | — |
| 2 | Vontobel Holding Ltd. | 121,944121,944 | $665,205 | — | NEW |
| 3 | GEODE CAPITAL MANAGEMENT, LLC | 63,16763,167 | $344,575 | — | NEW |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 53,44053,440 | $291,515 | — | NEW |
| 5 | Themes Management Co LLC | 39,03539,035 | $212,936 | — | NEW |
| 6 | VANGUARD FIDUCIARY TRUST CO | 25,47525,475 | $138,966 | — | NEW |
| 7 | NORTHERN TRUST CORP | 10,50610,506 | $57,310 | — | NEW |
| 8 | CITIGROUP INC | 6,3816,381 | $34,808 | — | NEW |
| 9 | OSAIC HOLDINGS, INC. | 3,0003,000 | $16,380 | — | ADD 28% |
| 10 | UBS Group AG | 173173 | $944 | — | TRIM -99% |
| 11 | Tower Research Capital LLC (TRC) | 106106 | $578 | — | NEW |
| 12 | HARBOUR INVESTMENTS, INC. | 5050 | $273 | — | NEW |
| 13 | JONES FINANCIAL COMPANIES LLLP | 2424 | $137 | — | TRIM -89% |
| 14 | Farther Finance Advisors, LLC | 33 | $18 | — | — |
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 |
|---|---|---|---|---|---|---|---|
| Harraden Circle Investments, LLC | — | — | — | 59K | 141K | 141K | $769,259 |
| Vontobel Holding Ltd. | — | — | — | — | — | 122K | $665,205 |
| GEODE CAPITAL MANAGEMENT, LLC | — | — | — | — | — | 63K | $344,575 |
| VANGUARD CAPITAL MANAGEMENT LLC | — | — | — | — | — | 53K | $291,515 |
| Themes Management Co LLC | — | — | — | — | — | 39K | $212,936 |
| VANGUARD FIDUCIARY TRUST CO | — | — | — | — | — | 25K | $138,966 |
| NORTHERN TRUST CORP | — | — | — | — | — | 11K | $57,310 |
| CITIGROUP INC | — | — | — | — | — | 6K | $34,808 |
| OSAIC HOLDINGS, INC. | — | — | — | — | 2K | 3K | $16,380 |
| UBS Group AG | — | — | — | — | 12K | 173 | $944 |
| Tower Research Capital LLC (TRC) | 19 | — | — | — | — | 106 | $578 |
| HARBOUR INVESTMENTS, INC. | — | — | — | — | — | 50 | $273 |
| JONES FINANCIAL COMPANIES LLLP | — | — | — | — | 228 | 24 | $137 |
| Farther Finance Advisors, LLC | 3 | 3 | 3 | 3 | 3 | 3 | $18 |
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 | 14 | 464,323 | — | $3M |
| 2025-Q4 | 7 | 166,320 | — | $1M |
| 2025-Q3 | 8 | 848,037 | — | $10M |
| 2025-Q2 | 12 | 1,315,594 | — | $15M |
| 2025-Q1 | 12 | 1,318,167 | — | $14M |
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 | |
|---|---|---|---|
| Vontobel Holding Ltd. | +121,944 | — | OPEN |
| GEODE CAPITAL MANAGEMENT, LLC | +63,167 | — | OPEN |
| VANGUARD CAPITAL MANAGEMENT LLC | +53,440 | — | OPEN |
| Themes Management Co LLC | +39,035 | — | OPEN |
| VANGUARD FIDUCIARY TRUST CO | +25,475 | — | OPEN |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| UBS Group AG | −11,865 | — | TRIM |
| DLD Asset Management, LP | −10,679 | — | CLOSE |
| JONES FINANCIAL COMPANIES LLLP | −204 | — | TRIM |
| JPMORGAN CHASE & CO | −3 | — | 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).
| 2024-Q4 |
| 12 |
| 1,444,354 |
| — |
| $15M |
| 2024-Q3 | 20 | 4,953,473 | — | $52M |
| 2024-Q2 | 21 | 4,432,993 | — | $46M |
| 2024-Q1 | 20 | 4,479,606 | — | $46M |
| 2023-Q4 | 22 | 4,283,306 | — | $43M |
| 2023-Q3 | 30 | 5,992,331 | — | $58M |
| 2023-Q2 | 25 | 5,339,707 | — | $50M |
| 2023-Q1 | 22 | 5,224,224 | — | $46M |
