SEC Form 4Coverage since May 22, 2026
$PRTA insider trading
Over the last 12 months, Prothena Corp Public insiders reported 5 buys totaling $3.1M and 8 sales totaling $2.9M across SEC Form 4 filings. 15% of the activity was filed under pre-arranged 10b5-1 trading plans.
- Bought · 12m
- $3.1M 5 events
- Sold · 12m
- $2.9M 8 events
- Events · 12m
- 13 Form 4 filings, grouped
- Insiders · 12m
- 9 distinct reporters
- 10b5-1 share
- 15% pre-arranged plans
Side
Price · $PRTA · 12Mvia TradingView
Top insiders · 12m
SCULLY WILLIAM P—5× · $3.1M
Kingston Anne EvansChief Strategy Officer1× · $65K
Isaacs Michael JohnGeneral Counsel & Company Sec.1× · $71K
Walker Karin LChief Accounting Officer1× · $128K
Swanson Chad J.Chief Development Officer1× · $349K
All insider trades
13 events
| Date | Insider | Type | Shares | Avg price | Value | Δ stake | Marks |
|---|---|---|---|---|---|---|---|
| Jul 29, 2026 | Kingston Anne EvansChief Strategy Officer · O | ▼ Sale | 7,662 | $8.47 | $65K | -12.1% | plan |
| Jul 29, 2026 | Isaacs Michael JohnGeneral Counsel & Company Sec. · O | ▼ Sale | 8,386 | $8.47 | $71K | -19% | plan |
| Jul 28, 2026 | Zago Wagner M.Chief Scientific Officer · O | ▽ Sale to issuer | 51,000 | $8.56 | $437K | -60% | — |
| Jul 28, 2026 | Walker Karin LChief Accounting Officer · O | ▽ Sale to issuer | 15,000 | $8.56 | $128K | -60% | — |
| Jul 28, 2026 | Swanson Chad J.Chief Development Officer · O | ▽ Sale to issuer | 40,800 | $8.56 | $349K | -48% | — |
| Jul 28, 2026 | Smith Brandon S.Chief Operating Officer · O | ▽ Sale to issuer | 78,000 | $8.56 | $668K | -60% | — |
| Jul 28, 2026 | Nguyen TranChief Strategy Officer and CFO · O | ▽ Sale to issuer | 57,000 | $8.56 | $488K | -58.6% | — |
| Jul 28, 2026 | Kinney Gene G.President and CEO · O·D | ▽ Sale to issuer | 84,000 | $8.56 | $719K | -55% | — |
| Jun 16, 2026 | SCULLY WILLIAM P10% | ▲ Buy | 20,000 | $7.9 | $158K | +2.7% | — |
| Jun 11, 2026 | SCULLY WILLIAM P10% | ▲ Buy | 125,000 | $8.17 | $1.0M | +13.4% | — |
| Jun 4, 2026 | SCULLY WILLIAM P10% | ▲ Buy | 50,000 | $9.31 | $465K | +5.6% | — |
| Jun 2, 2026 | SCULLY WILLIAM P10% | ▲ Buy | 50,000 | $9.43 | $471K | +6% | — |
| May 22, 2026 | SCULLY WILLIAM P10% | ▲ Buy | 100,000 | $9.81 | $981K | +13.6% | — |
About Form 4
Corporate insiders — officers, directors and 10%+ owners — must report their trades to the SEC on Form 4 within two business days. We group each filing's transactions into one economic event (a laddered 10b5-1 sale is one event, not 25 rows), flag pre-arranged plans and late filings, and link every event to its AI-scored article in the $PRTA feed.