% 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 ERNAW 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 | ARMISTICE CAPITAL, LLC | 4,000,0004.0M | $112,000 | — | NEW |
| 2 | Bleichroeder LP | 2,000,0002.0M | $56,000 | — | NEW |
| 3 | HEIGHTS CAPITAL MANAGEMENT, INC | 400,000400,000 | $16,000 | — | NEW |
| 4 | Warberg Asset Management LLC | 253,800253,800 | $7,106 | — | NEW |
| 5 | Clear Street Group Inc. | 149,300149,300 | $4,180 | — | NEW |
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 |
|---|---|---|---|---|---|---|---|
| ARMISTICE CAPITAL, LLC | — | — | — | — | — | 4.0M | $112,000 |
| Bleichroeder LP | — | — | — | — | — | 2.0M | $56,000 |
| HEIGHTS CAPITAL MANAGEMENT, INC | — | — | — | — | — | 400K | $16,000 |
| Warberg Asset Management LLC | — | — | — | — | — | 254K | $7,106 |
| Clear Street Group Inc. | — | — | — | — | — | 149K | $4,180 |
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.
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 | |
|---|---|---|---|
| ARMISTICE CAPITAL, LLC | +4,000,000 | $112,000 | OPEN |
| Bleichroeder LP | +2,000,000 | $56,000 | OPEN |
| HEIGHTS CAPITAL MANAGEMENT, INC | +400,000 | $11,200 | OPEN |
| Warberg Asset Management LLC | +253,800 | $7,106 | OPEN |
| Clear Street Group Inc. | +149,300 | $4,180 | OPEN |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| No filer reduced its position this quarter. | |||
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).
