Marianna Mancini is COO at Viking Therapeutics, Inc. (VKTX). They have made 8 open-market trades across 1 company since 2023, most recently 2026-07-29.
CIK 0001838112
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 8 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| VKTX | 422,760 | $10.6M |
Shares reported on the most recent Form 4, priced at the 2026-07-29 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 |
|---|---|---|---|---|---|---|---|---|
| VKTX | SELL | 2026-07-29 | 2026-07-29 | $33.47 | $610K | +3.0% | -3.9% | — |
| VKTX | SELL | 2026-01-05 | 2026-01-05 | $32.98 | $1.9M | +0.0% | -7.3% | +6.5% |
| VKTX | SELL | 2025-10-28 | 2025-10-28 | $35.00 | $216K | +4.5% | +4.6% | -9.8% |
| VKTX | SELL | 2025-07-03 | 2025-07-03 | $27.77 | $237K | +13.2% | +21.6% | -2.1% |
| VKTX | SELL | 2025-01-06 | 2025-01-06 | $42.72 | $4.4M | -23.2% | -21.2% | -49.9% |
| VKTX | SELL | 2024-07-30 | 2024-07-31 | $57.13 | $2.1M | +2.8% | +12.9% | +29.1% |
| VKTX | SELL · 10b5-1 | 2024-05-01 | 2024-05-02 | $78.66 | $44.3M | -2.7% | -16.4% | -23.5% |
| VKTX | SELL | 2023-04-17 | 2023-04-18 | $20.00 | $250K | +5.6% | +14.9% | -23.3% |
| VKTX | SELL | 2023-03-28 | 2023-03-30 | $15.17 | $3.6M | +2.0% | +27.2% | -10.8% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.