Howard Horn is CFO at Ultragenyx Pharmaceutical Inc. (RARE). They have made 20 open-market trades across 2 companies since 2020, most recently 2026-08-03.
CIK 0001786335
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 20 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| VIR | 230,712 | $2.3M |
| RARE | 96,295 | $1.4M |
| Total | $3.7M |
Shares reported on the most recent Form 4, priced at the 2026-08-04 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| RARE | SELL | 2026-08-03 | 2026-08-04 | $24.92 | $117K | -4.4% | -46.4% | — |
| RARE | SELL | 2026-07-01 | 2026-07-06 | $33.13 | $156K | -12.0% | -27.3% | -57.7% |
| RARE | SELL | 2026-06-01 | 2026-06-01 | $23.77 | $111K | +6.7% | +44.0% | +12.0% |
| RARE | SELL | 2026-05-01 | 2026-05-04 | $24.90 | $117K | +2.2% | -11.2% | -0.9% |
| RARE | SELL | 2026-04-01 | 2026-04-02 | $20.97 | $98K | +12.2% | +10.5% | +44.3% |
| RARE | SELL | 2026-03-02 | 2026-03-03 | $22.65 | $228K | -3.3% | +1.7% | +3.6% |
| RARE | SELL | 2026-02-02 | 2026-02-03 | $23.56 | $72K | -18.1% | -14.4% | -1.1% |
| RARE | SELL | 2026-01-02 | 2026-01-05 | $22.84 | $72K | +2.4% | +7.6% | -0.3% |
| RARE | SELL | 2025-12-10 | 2025-12-11 | $36.38 | $224K | -6.2% | -33.0% | -39.0% |
| RARE | SELL | 2025-10-13 | 2025-10-14 | $31.51 | $501K | +5.5% | +3.6% | -23.3% |
| RARE | SELL | 2025-03-06 | 2025-03-10 | $40.40 | $72K | +3.6% | -9.6% | -1.3% |
| RARE | SELL | 2024-10-10 | 2024-10-11 | $52.76 | $788K | -0.1% | -7.3% | -23.1% |
| VIR | SELL | 2023-02-23 | 2023-02-24 | $25.97 | $117K | -0.4% | +1.1% | +13.3% |
| VIR | SELL | 2023-02-17 | 2023-02-21 | $25.29 | $123K | -15.4% | -17.6% | -4.7% |
| VIR | SELL | 2022-02-17 | 2022-02-22 | $31.93 | $153K | -21.9% | -15.1% | -18.7% |
| VIR | SELL | 2020-07-13 | 2020-07-15 | $50.06 | $1.5M | -5.1% | +4.8% | -14.8% |
| VIR | SELL | 2020-07-01 | 2020-07-02 | $38.92 | $778K | +30.6% | +27.6% | -11.5% |
| VIR | SELL | 2020-06-25 | 2020-06-26 | $50.00 | $1.5M | +23.7% | +25.1% | -15.4% |
| VIR | SELL | 2020-06-19 | 2020-06-23 | $40.00 | $400K | +1.6% | +21.6% | -20.7% |
| VIR | SELL | 2020-06-01 | 2020-06-02 | $35.10 | $702K | -6.7% | +10.0% | +10.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.