| # | Holder | Shares | Value | % of shares out | Δ QoQ |
|---|---|---|---|---|---|
| 1 | AIGH Capital Management LLC | 3,595,2503.6M | $4M | 7.83% | ADD 17% |
| 2 | Nantahala Capital Management, LLC | 3,184,9473.2M | $3M | 6.93% | — |
| 3 | Knollwood Investment Advisory, LLC | 2,556,7242.6M | $3M | 5.57% | — |
| 4 | SILVERARC CAPITAL MANAGEMENT, LLC | 2,498,0202.5M | $3M | 5.44% | TRIM -9% |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 1,023,6991.0M | $1M | 2.23% | NEW† |
| 6 | PERKINS CAPITAL MANAGEMENT INC | 756,894756,894 | $794,738 | 1.65% | TRIM -3% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 293,396293,396 | $308,093 | 0.64% | ADD 15% |
| 8 | Corient Private Wealth LLC | 249,032249,032 | $261,484 | 0.54% | NEW |
| 9 | Birchview Capital, LP | 165,094165,094 | $173,349 | 0.36% | TRIM -37% |
| 10 | BlackRock, Inc. | 122,073122,073 | $128,177 | 0.27% | ADD 19% |
| 11 | Rossmore Private Capital | 120,000120,000 | $126,000 | 0.26% | ADD 140% |
| 12 | VANGUARD FIDUCIARY TRUST CO | 119,345119,345 | $125,312 | 0.26% | NEW |
| 13 | CITADEL ADVISORS LLC | 112,105112,105 | $117,710 | 0.24% | TRIM -27% |
| 14 | RENAISSANCE TECHNOLOGIES LLC | 82,71682,716 | $86,852 | 0.18% | TRIM -19% |
| 15 | JANE STREET GROUP, LLC | 64,07764,077 | $67,281 | 0.14% | ADD 36% |
| 16 | FNY Investment Advisers, LLC | 44,67744,677 | $46,000 | 0.10% | ADD 21% |
| 17 | XTX Topco Ltd | 38,15038,150 | $40,058 | 0.08% | TRIM -63% |
| 18 | Arcus Capital Partners, LLC | 30,05030,050 | $31,553 | 0.07% | — |
| 19 | NORTHERN TRUST CORP | 27,66227,662 | $29,045 | 0.06% | — |
| 20 | BROWN ADVISORY INC | 20,13520,135 | $21,142 | 0.04% | NEW |
| 21 | Verdence Capital Advisors LLC | 19,41019,410 | $20,381 | 0.04% | — |
| 22 | Qube Research & Technologies Ltd | 17,07617,076 | $17,930 | 0.04% | TRIM -15% |
| 23 | Tufton Capital Management | 14,55014,550 | $15,000 | 0.03% | — |
| 24 | Fund Evaluation Group, LLC | 12,61212,612 | $13,243 | 0.03% | NEW |
| 25 | Indie Asset Partners, LLC | 12,61212,612 | $13,243 | 0.03% | — |
| 26 | STATE STREET CORP | 11,96911,969 | $12,567 | 0.03% | — |
| 27 | Family Manage LLC | 10,04510,045 | $10,547 | 0.02% | — |
| 28 | Vanguard Global Advisers, LLC | 8,1408,140 | $8,547 | 0.02% | NEW |
| 29 | UBS Group AG | 7,4877,487 | $7,861 | 0.02% | ADD 25717% |
| 30 | MORGAN STANLEY | 6,9716,971 | $7,320 | 0.02% | TRIM -13% |
| 31 | WELLS FARGO & COMPANY/MN | 5,0005,000 | $5,250 | 0.01% | ADD 213% |
| 32 | Tower Research Capital LLC (TRC) | 4,5644,564 | $4,792 | 0.01% | TRIM -27% |
| 33 | SBI Securities Co., Ltd. | 5555 | $58 | 0.00% | — |
| 34 | BNP PARIBAS FINANCIAL MARKETS | 33 | $3 | 0.00% | TRIM -57% |
| 35 | ROYAL BANK OF CANADA | 242242 | $0 | 0.00% | NEW |
† a filer this large appearing as NEW usually reflects a renamed or succeeded filing entity (the old name stops filing the same quarter) — not a brand-new position.
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 |
|---|---|---|---|---|---|---|---|
| AIGH Capital Management LLC | 3.1M | 3.4M | 3.5M | 3.2M | 3.1M | 3.6M | $4M |
| Nantahala Capital Management, LLC | 2.9M | 3.2M | 3.2M | 3.2M | 3.2M | 3.2M | $3M |
| Knollwood Investment Advisory, LLC | 935K | 1.0M | 1.0M | 1.0M | 2.6M | 2.6M | $3M |
| SILVERARC CAPITAL MANAGEMENT, LLC | 1.8M | 2.7M | 2.8M | 2.9M | 2.8M | 2.5M | $3M |
| VANGUARD CAPITAL MANAGEMENT LLC | — | — | — | — | — | 1.0M | $1M |
| PERKINS CAPITAL MANAGEMENT INC | 860K | 1.1M | 1.2M | 1.1M | 781K | 757K | $794,738 |
| GEODE CAPITAL MANAGEMENT, LLC | 190K | 247K | 248K | 255K | 255K | 293K | $308,093 |
| Corient Private Wealth LLC | — | — | — | — | — | 249K | $261,484 |
| Birchview Capital, LP | 2.5M | 1.2M | 1.2M | 711K | 263K | 165K | $173,349 |
| BlackRock, Inc. | 75K | 77K | 96K | 101K | 103K | 122K | $128,177 |
| Rossmore Private Capital | — | — | — | — | 50K | 120K | $126,000 |
| VANGUARD FIDUCIARY TRUST CO | — | — | — | — | — | 119K | $125,312 |
| CITADEL ADVISORS LLC | 22K | — | — | 57K | 154K | 112K | $117,710 |
| RENAISSANCE TECHNOLOGIES LLC | 57K | 38K | 37K | 62K | 102K | 83K | $86,852 |
| JANE STREET GROUP, LLC | — | 19K | 15K | 68K | 47K | 64K | $67,281 |
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.
Line breaks are honest gaps — quarters with no 13F record, or a suppressed % — never interpolated. % of shares outstanding divides each quarter's as-filed 13F shares by the SEC cover-page share count dated to that same quarter (split-adjusted), not by today's count — so splits and buybacks don't move the line.
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 | |
|---|---|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC | +1,023,699 | $1M | OPEN |
| AIGH Capital Management LLC | +527,065 | $553,418 | ADD |
| Corient Private Wealth LLC | +249,032 | $261,484 | OPEN |
| VANGUARD FIDUCIARY TRUST CO | +119,345 | $125,312 | OPEN |
| Rossmore Private Capital | +70,000 | $73,500 | ADD |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| Alyeska Investment Group, L.P. | −1,281,172 | $1M | CLOSE |
| VANGUARD GROUP INC | −1,157,484 | $1M | CLOSE |
| SILVERARC CAPITAL MANAGEMENT, LLC | −253,294 | $265,959 | TRIM |
| Birchview Capital, LP | −97,924 | $102,820 | TRIM |
| XTX Topco Ltd | −64,354 | $67,572 | 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 | 35 | 15,234,782 | 33.2% | $16M |
| 2025-Q4 | 33 | 16,093,085 | 35.0% | $11M |
| 2025-Q3 | 31 | 18,063,606 | 39.3% | $16M |
| 2025-Q2 | 28 | 17,383,197 | — | $34M |
| 2025-Q1 | 31 | 17,214,569 | — | $44M |
| 2024-Q4 | 32 | 14,411,206 | — | $54M |
| 2024-Q3 | 29 | 13,512,589 | — | $52M |
| 2024-Q2 | 26 | 12,322,200 | — | $61M |
| 2024-Q1 | 22 | 7,345,614 | — | $23M |
| 2023-Q4 | 24 | 10,194,112 | — | $22M |
| 2023-Q3 | 21 | 8,249,667 | — | $12M |
| 2023-Q2 | 19 | 3,062,317 | — | $7M |
| 2023-Q1 | 18 | 2,780,970 | — | $4M |
| 2022-Q4 | 19 | 4,339,593 | — | $18M |
| 2022-Q3 | 17 | 3,332,901 | — | $24M |
| 2022-Q2 | 17 | 3,339,644 | — | $24M |
| 2022-Q1 | 17 | 3,285,257 | — | $19M |
| 2021-Q4 | 15 | 3,234,534 | — | $20M |
| 2021-Q3 | 17 | 1,897,450 | — | $13M |
| 2021-Q2 | 24 | 2,050,300 | — | $20M |
| 2021-Q1 | 31 | 1,702,385 | — | $24M |
| 2020-Q4 | 34 | 1,839,812 | — | $25M |
