% 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 lands with its cohort — the cohort is size-matched, so it needs a market cap for HRZN in the served universe — that lands with the next screener build.
Ranked by each filer’s own reported value, not shares.
| Biggest buyers | Δ shares | Δ value | |
|---|---|---|---|
| UBS Group AG | +104,156 | $438,497 | ADD |
| MILLENNIUM MANAGEMENT LLC | +64,417 | $271,196 | ADD |
| IMC-Chicago, LLC | +61,795 | $260,157 | OPEN |
| Green Alpha Advisors, LLC | +31,197 | $131,339 | ADD |
| Legal & General Group Plc | +21,751 | $91,572 | ADD |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| TWO SIGMA INVESTMENTS, LP | −369,074 | $2M | TRIM |
| MARSHALL WACE, LLP | −110,511 | $465,251 | TRIM |
| BlackRock, Inc. | −108,460 | $456,617 | TRIM |
| JANE STREET GROUP, LLC | −82,290 | $346,441 | CLOSE |
| TWO SIGMA ADVISERS, LP | −63,197 | $266,059 | CLOSE |
Prior quarter split-rebased · 13Fs are long, US-listed only.
| Holder | 2024-Q4 | 2025-Q1 | 2025-Q2 | 2025-Q3 | 2025-Q4 | 2026-Q1 | Latest value |
|---|---|---|---|---|---|---|---|
| Green Alpha Advisors, LLC | 290K | 359K | 388K | 500K | 559K | 590K | $2M |
| Eagle Point Credit Management LLC | — | — | — | — | 370K | 366K | $2M |
| Legal & General Group Plc | 239K | 268K | 267K | 248K | 307K | 329K | $1M |
| Connecticut Wealth Management, LLC | 210K | 211K | 211K | 212K | 213K | 214K | $900,143 |
| BlackRock, Inc. | 161K | 174K | 233K | 301K | 288K | 179K | $755,639 |
| MARSHALL WACE, LLP | 143K | — | 14K | 348K | 282K | 172K | $723,186 |
| TWO SIGMA INVESTMENTS, LP | 103K | 264K | 89K | — | 519K | 150K | $632,254 |
| UBS Group AG | 154K | 45K | 76K | 107K | 40K | 144K | $606,813 |
| Virtus Investment Advisers, LLC | — | 142K | 178K | 211K | 168K | 144K | $606,105 |
| MILLENNIUM MANAGEMENT LLC | 96K | — | — | 180K | 12K | 76K | $319,825 |
| FIRST FINANCIAL BANK - TRUST DIVISION | 46K | 46K | 46K | 46K | 66K | 66K | $276,062 |
| IMC-Chicago, LLC | — | — | 35K | — | — | 62K | $260,157 |
| BANK OF AMERICA CORP /DE/ | 1K | 1K | 2K | 1K | 64K | 61K | $256,612 |
| CANADA LIFE ASSURANCE Co | 29K | 36K | 43K | 53K | 53K | 56K | $240,000 |
| Pathstone Holdings, LLC | 24K | 24K | 24K | 23K | 50K | 52K | $221,135 |
Green = added, red = trimmed, grey = held; a dash is a quarter with no 13F on file — a gap, not an exit.
Holders only — breaks = no 13F.
Short interest has its own tab now — open SI →
SEC Form 13F · ~10,250 filers, 10y · long-only, US-listed, filed ≤45d after quarter-end.
