COMPANY RESEARCH
PROTHENA CORP PUBLIC LTD CO
PRTA · United States · Healthcare
INSIDER SIGNAL
Insider activity score：63.2 / 100
1 insiders · 16 purchase events · $10.72m net purchases
US #246 · United States #246
WHY THIS SIGNAL?
Score anatomy
Each bar shows the contribution to the current score; the weights and formula stay unchanged.
Cluster+7.0 / 35
How many distinct insiders bought in the cluster
Purchase size+23.0 / 25
Purchase value relative to company size and liquidity
Role+6.0 / 20
The seniority and relevance of participating insiders
Recency+9.4 / 10
How recently the purchases occurred
Conviction+9.9 / 10
How clearly buying stands out from other activity
What is holding the score back?
- ⚠ Buyer breadth is moderate · fewer than 4 distinct filers
- ⚠ Insider role contributes less on the current role scale
- ✓ Recent activity · latest purchase 2026-10-14
The role contribution follows the US model's seniority ladder.
Buying concentration
100%
Largest buyer：SCULLY WILLIAM P · 10.85m USD
Gross qualified purchase transaction-line value：10.85m USD
The headline $ total is net buying for the screen; this module uses gross qualified purchase transaction-line values in the filing currency, so the amounts can differ. The current 15-day buyer-breadth input counts distinct buyers; value concentration is disclosed separately here.
This is a ranking under the current US screening rules—not a probability of gain, return forecast, or buy recommendation.
Key purchase quotes (filing currency)
| Filer | Price per unit | Trade date |
|---|---|---|
| SCULLY WILLIAM P | 8.4569 USD | Oct 14, 2026 |
| SCULLY WILLIAM P | 8.3548 USD | Oct 13, 2026 |
| SCULLY WILLIAM P | 8.68 USD | Sep 29, 2026 |
Model details
Cluster breakdown (does not change the score)
- 15-day buyer breadth (count)
- 1 distinct reported filers
- Peak time window
- 2026-05-22 to 2026-06-04
- Current breadth input
- 0.200 (capped at 4+ buyers)
- Buyer independence
- Not yet measured; related-party fields are not cross-market comparable
What the filings show
- 🟢 Recent eligible purchase
SCULLY WILLIAM P · 85k USD · Price 8.4569 USD · Oct 14, 2026 - 🟢 Eligible purchase
SCULLY WILLIAM P · 835k USD · Price 8.3548 USD · Oct 13, 2026 - 🟢 Large eligible purchase
SCULLY WILLIAM P · 1.41m USD · Price 8.68 USD · Sep 29, 2026 - 🟡 14 remaining qualified transaction line(s) across 12 disclosure(s)
- 🔴 21 other transaction line(s) are not counted as discretionary-buying evidence; 4 have zero price
Insider vs stock price
16 purchase day(s), 17 purchase line(s) in the 180-day window. 1 sale day(s), 2 sale line(s).
Daily close (USD)Day with an insider purchaseDay with an insider sale
Markers sit on the closing price of the transaction day. They show when insiders traded, not the price they paid or received. "Since" compares that day's close with the last close shown; it is what happened at this company, not a forecast.
If you had followed the purchase
Each row starts on the first close on or after the day a purchase was made public, the earliest a reader could have acted, and ends on the last close shown above.
| Made public | Insiders | In this stock, now | In the median peer stock, now | Difference |
|---|---|---|---|---|
| 2026-05-26 | 1 | 830 −17.0% | 909 −9.1% | −79 −7.9 pts |
| 2026-06-03 | 1 | 936 −6.4% | 899 −10.1% | +37 +3.7 pts |
| 2026-06-05 | 1 | 950 −5.0% | 916 −8.4% | +34 +3.4 pts |
| 2026-06-12 | 1 | 1,012 +1.2% | 916 −8.4% | +96 +9.6 pts |
| 2026-06-18 | 1 | 935 −6.5% | 924 −7.6% | +11 +1.1 pts |
| 2026-08-10 | 1 | 916 −8.4% | 915 −8.5% | 0 +0.0 pts |
| 2026-08-21 | 1 | 884 −11.6% | 927 −7.3% | −43 −4.3 pts |
| 2026-09-03 | 1 | 870 −13.0% | 931 −6.9% | −62 −6.2 pts |
| 2026-09-21 | 1 | 981 −1.9% | 958 −4.2% | +23 +2.3 pts |
| 2026-09-29 | 1 | 951 −4.9% | 986 −1.4% | −35 −3.5 pts |
| 2026-09-30 | 1 | 996 −0.4% | 989 −1.1% | +8 +0.8 pts |
| 2026-10-06 | 1 | 1,041 +4.1% | 978 −2.2% | +63 +6.3 pts |
| 2026-10-09 | 1 | 945 −5.5% | 992 −0.8% | −47 −4.7 pts |
| 2026-10-15 | 1 | 982 −1.8% | 995 −0.5% | −13 −1.3 pts |
8 of 14 disclosure day(s) ended ahead of the median peer stock.
Close to close, before costs, taxes, dividends and currency moves. The peer is the median of the other stocks on the same exchange for which this site holds prices (111 here), not an index. This is what happened, not a forecast: across all purchases on this site the typical gap is close to zero.
Insider timeline
One insider bought, 16 times, the latest (14 Oct). The share closed at 8.37 that day and at 8.35 most recently (−0.2%).
Tap an item for what it means.
●A purchase: the bigger the dot, the more was bought
Each dot is one insider's purchases on one day. The dot's area follows the amount: the largest purchase here gets the largest dot. Hold the pointer over a dot to see the date and the amount.
×A sale
A cross is one insider's sales on one day. People sell to pay tax, to cash in share awards or to hold less of one company, so a sale says less than a purchase does. When someone bought and sold on the same day, the cross sits beside the dot. The totals are under “Purchases against sales” below.
Blue line: this share's price, −21.7% over these six months
The closing price of each day, from 10.67 on 2026-04-21 to 8.35 on 2026-10-16. The line has no scale; read it for high and low: a dot on a low stretch was bought cheaply, a dot on a high stretch was not.
Dashed line: the typical stock on the same exchange, −11.2%
Taken from the 1230 other stocks on the same exchange that this site holds prices for. Each is measured from the first day of the window, and every day the middle one is drawn. It starts where the blue line starts, so the gap between the two is the difference: this share −21.7%, the typical one −11.2%, 10.5 points behind. It is not an index and not a comparison within one industry.
▂Grey bars: companies across United States disclosing purchases each week
A taller bar is a week in which more companies disclosed insider purchases.
This company: insiders buying per month, last 12 months
Nov
Dec
Jan
Feb
Mar
Apr
1May
1Jun
Jul
1Aug
1Sep
1Oct
Darker bars are inside the 180-day window above.
Who traded
| Insider | Role | Purchases | Sales | Bought | First purchase | Share price since |
|---|---|---|---|---|---|---|
| Isaacs Michael John | Executive | — | 1 | — | — | — |
| Kingston Anne Evans | Executive | — | 1 | — | — | — |
| SCULLY WILLIAM P | Associated person | 16 | — | 10.9M USD | 2026-05-22 | −15.1% |
Purchases against sales
Purchases99%10.9M USD · 17 line(s) · 1 insider(s)
Sales1%135.9k USD · 2 line(s) · 2 insider(s)
Shares of the reported value of insider transactions in the 180-day window. Sales include disposals for tax, at option exercise or under a pre-set plan, which say little about an insider's view. The split describes what was disclosed; it is not a signal.
Why this score? · Model details
Priority = 100 × Σ(fixed weight × 0–1 rule-based input)
| Factor | Weight | This company input | Point contribution |
|---|---|---|---|
| 15-day buyer breadth (count) | 35% | 0.200 | 7.0 |
| Qualified-buy size | 25% | 0.920 | 23.0 |
| Role informativeness (inverted) | 20% | 0.700 | 14.0 |
| Recency | 10% | 0.936 | 9.4 |
| Buy/sell conviction | 10% | 0.987 | 9.9 |
This is a heuristic ordering under the current rules, not a calibrated return forecast. It explains why candidates rank differently; the public-filing evidence and data limits are shown below.
BULL VS BEAR
Two readings of this buying
The same filings, read two ways. Each line is a fact stored for this company with the number behind it, and appears only when that number crosses a fixed threshold. Neither side is a forecast and no winner is declared.
Where the evidence comes from
The two kinds of evidence disagree: the purchases themselves carry bull lines (large purchases, purchase added much to the holding, bought in the last two weeks), while share price and trading argue against (price down over six months); short sellers argue against (high short interest). No data is held for: company results, company actions.
- The insider purchases themselvesBulllarge purchases, purchase added much to the holding, bought in the last two weeks Bearone buyer only4 checked, under the threshold · 1 missing
- Share price and tradingBearprice down over six months1 checked, under the threshold
- Short sellersBearhigh short interest1 checked, under the threshold
- Company results2 missing
- Company actionsno data held
Bull case · the buying is informative
- Insiders committed a net $10.7M of their own money in 180 days.
- 11 of 14 purchase filings state the shares held before and after. The largest addition to an existing holding took it from 52,000 to 214,000 shares (+312%). A holding here is one way of owning the shares: directly, or through one named trust or entity.
- The latest purchase is 4 days old (2026-10-14). The buying is current, not left over from an earlier quarter.
Bear case · discount it
- Only one insider bought. A single purchase can reflect that person's own finances rather than a view on the company.
- Share price and tradingThe share price is down 23% over six months (three months −3.7%, one month −1.3%) and stands 29% below its 52-week high. Insiders have bought into a fall the market has not reversed.
- Short sellersFINRA short interest on 2026-09-30 was 8,010,864 shares, 13.8 days of average trading volume, down 6.2% from the previous report: other investors hold a sizeable position the opposite way.
Evidence still missing
- No buyer here has 5 or more completed earlier purchases on record, so there is no track record to weigh.
- The company's market value is not captured, so the purchases cannot be stated as a share of the business or of its trading volume.
- No earnings, margin or cash-flow figures are captured for this company. The latest annual and interim reports are where to check whether the business is improving or deteriorating.
Checked and under the threshold: 6
- Either1 insider bought in the last 180 days and 0 in the 180 days before. Bull when the number at least doubles and rises by two; bear when at least two bought before and no more buy now.
- BearInsiders sold $136k in the same 180 days, 1.3% of the amount bought. Counted for the bear side from 25%.
- BearOver three months the share price changed −3.7% and the median of 219 Healthcare companies changed −12%: ahead by 8 points. Counted for the bear side from 20 points behind.
- BearNone of the 11 purchase filings ticks Form 4's 10b5-1 box.
- BearOver the last 5 trading days to 2026-10-16, 58% of this stock's off-exchange volume was sold short; over the 60 days before, 66%. The market's median is 50%. This is trading volume, not a position: a market maker who sells short and covers the same day is counted, so about half of all volume is short on an ordinary day. It is shown for comparison and counts for neither side.
- BearNo insider filing in the last 180 days opened a hedge on this stock.
Both columns arrange stored facts only. They do not change the insider score or the ranking and are not investment advice.
Signal history
63.2 / 100
Latest recorded score
↑ +2.0 ptssince the first recorded snapshot on 2026-10-09; 9 calendar days observed
- Recorded snapshots
- 7
- First snapshot
- 2026-10-09
There is not yet a 30-calendar-day comparison; earlier scores are not reconstructed. These are raw signal scores saved when each full scoring run completed. They describe changes in research ranking, not price performance or returns.
Why did it change?
Less than 30 days of comparable history is available, so factor movement is not yet decomposed.
Signal score history
Fixed 0–100 scale; dates are spaced by calendar time.
Recent recorded points
- 61.2
- 62.9
- 62.8
- 62.6
- 63.2
View all recorded scores
| Snapshot date | Signal score |
|---|---|
| 2026-10-09 | 61.2 |
| 2026-10-12 | 63.1 |
| 2026-10-13 | 62.9 |
| 2026-10-14 | 62.8 |
| 2026-10-15 | 62.6 |
| 2026-10-16 | 63.6 |
| 2026-10-18 | 63.2 |
Sector context
- Buying breadth
- 4.1% (42 / 1,029 issuers)
- Sector rank
- #8 / 13
This is sector-level research context. It does not affect the Insider Signal or ranking.
Insider profile outcomes
Historical performance following insider filings. The company role is translated below each name while preserving the original title.
- Excess return = stock return − S&P 500 ETF (SPY adjusted close) return over the same period.
- Hit rate = completed events with positive excess return ÷ total completed events.
- Price coverage = valid point-in-time prices ÷ events mature enough for that period.
- Returns start on the first shared trading session on or after publication.
- Small-sample rule: n<5 is shown for transparency and is not scored.
Events are disclosure-level observations; related disclosures published on the same date may share a return path and may not be statistically independent. This research enrichment does not affect the insider score or ranking.
Signal outcomes
Calculated from immutable US ranking snapshots; excess return is stock return minus SPY return. Newly saved snapshots remain pending until each forward horizon matures. This never affects the US score.
| Horizon | Status | Result |
|---|---|---|
| 5D | Awaiting maturity | — |
| 20D | Awaiting maturity | — |
| 60D | Awaiting maturity | — |
| 120D | Awaiting maturity | — |
Market context
PRICE PERFORMANCE
VOLATILITY & LIQUIDITY
- Volatility
- 64.3%
- Beta
- —
- Avg daily volume
- $4.1M
VALUATION
- Market cap
- —
- P/E
- —
FUNDAMENTALS
- Profit margin
- —
- ROE
- —
- Industry
- —
Prices to 18 Oct 2026: OpenBB/yfinance; volume from price cache (yfinance). It does not affect the insider score or rank.
Insiders' buying price vs the latest close
Insiders paid 8.68 USD a share on average (17 purchase lines, 1 buyer, 2026-05-22 – 2026-10-14). The close on 2026-10-16 was 3.8% below that price.
The latest purchase (2026-10-14) was at 8.46 USD; the close was 1.3% below that price.
Prices paid are weighted by shares and taken from the filings; dividends are not counted. Not scored.
Buying size vs market trading
Complete price and volume history is not yet available.
Market-data coverage: 0 verified sessions · Latest session: — · Ratio status: Unavailable
Traded value is estimated as close × shares traded, in major currency units. Includes disclosed qualifying purchases; disclosures may lag. Contractual or planned acquisitions are not necessarily discretionary. Ratios describe relative trading size, not market participation or score contributions.
Regulatory filings
- Insider filing announcement · published 2026-10-15 · trade date 2026-10-14
- Insider filing announcement · published 2026-10-09 · trade date 2026-10-08
- Insider filing announcement · published 2026-10-06 · trade date 2026-10-02
Unfold all 25 filings
- Insider filing announcement · published 2026-10-15 · trade date 2026-10-14
- Insider filing announcement · published 2026-10-09 · trade date 2026-10-08
- Insider filing announcement · published 2026-10-06 · trade date 2026-10-02
- Insider filing announcement · published 2026-09-30 · trade date 2026-09-29
- Insider filing announcement · published 2026-09-29 · trade date 2026-09-28
- Insider filing announcement · published 2026-09-21 · trade date 2026-09-18
- Insider filing announcement · published 2026-09-03 · trade date 2026-09-02
- Insider filing announcement · published 2026-08-21 · trade date 2026-08-20
- Insider filing announcement · published 2026-08-18 · trade date 2026-08-18
- Insider filing announcement · published 2026-08-11 · trade date 2026-08-10
- Insider filing announcement · published 2026-08-10 · trade date 2026-08-07
- Insider filing announcement · published 2026-07-30 · trade date 2026-07-29
- Insider filing announcement · published 2026-07-30 · trade date 2026-07-29
- Insider filing announcement · published 2026-07-30 · trade date 2026-07-28
- Insider filing announcement · published 2026-07-30 · trade date 2026-07-28
- Insider filing announcement · published 2026-07-30 · trade date 2026-07-28
- Insider filing announcement · published 2026-07-30 · trade date 2026-07-28
- Insider filing announcement · published 2026-07-30 · trade date 2026-07-28
- Insider filing announcement · published 2026-07-30 · trade date 2026-07-28
- Insider filing announcement · published 2026-06-18 · trade date 2026-06-16
- Insider filing announcement · published 2026-06-16 · trade date 2026-06-15
- Insider filing announcement · published 2026-06-12 · trade date 2026-06-11
- Insider filing announcement · published 2026-06-05 · trade date 2026-06-04
- Insider filing announcement · published 2026-06-03 · trade date 2026-06-02
- Insider filing announcement · published 2026-05-26 · trade date 2026-05-22
Results and insider purchases
| Results (8-K) | Bought within 5 sessions | Bought within 20 sessions | Buyers, 20 sessions before |
|---|---|---|---|
| 2026-08-0616:16 ET · after the closeFirst session 2026-08-07 | 1 · $323.2KSCULLY WILLIAM P | 1 · $1.0MSCULLY WILLIAM P | 0 |
| 2026-05-0716:14 ET · after the closeFirst session 2026-05-08 | None | 1 · $1.9MSCULLY WILLIAM P | 0 |
| 2026-02-1916:07 ET · after the closeFirst session 2026-02-20 | None | None | 0 |
| 2025-11-0616:09 ET · after the closeFirst session 2025-11-07 | None | None | 0 |
Results dates are the company's 8-K filings to the SEC under Item 2.02 (results of operations); one filed after the close counts from the next session. Purchases are open-market buys reported on Form 4 (code P), by trade date; a Form 4 can arrive two business days after the trade, so the latest days can still fill in. Facts only; this does not change the score or rank.
Ownership and trading-plan context
| Direct / indirect ownership | Mixed direct / indirect, Unavailable |
|---|---|
| 10b5-1 filing evidence | Not declared in filing field, Unavailable |
| Evidence retrieved | 2026-10-18T21:07:10+00:00 |
These are accession-level filing fields. Unavailable means the evidence was not fetched or parsed; it is never inferred as “No” and does not adjust the US score.
Filing evidence
These are underlying national-feed records from the 365-day window ending on the saved ranking snapshot. The score uses only the latest 180 days; older qualifying equity purchases remain visible for audit but do not enter the current score. The original filer, role, transaction classification, instrument, price, volume, value and source fields are retained. The first three rows are shown; remaining records can be unfolded for audit. Other transaction types are retained but excluded from the score.
Excluded transactions & classification
14 qualifying purchase disclosure(s) · 17 transaction line(s)
Jun 16, 2026Open market purchase
SCULLY WILLIAM P · TenPercentOwner
Ordinary Shares, par value $0.01 per share · 20000.0 shares × 7.9 USD · 158000.0 USD
Open filingJun 11, 2026Open market purchase
SCULLY WILLIAM P · TenPercentOwner
Ordinary Shares, par value $0.01 per share · 125000.0 shares × 8.17 USD · 1021250.0 USD
Open filingJun 4, 2026Open market purchase
SCULLY WILLIAM P · TenPercentOwner
Ordinary Shares, par value $0.01 per share · 50000.0 shares × 9.31 USD · 465500.0 USD
Open filingUnfold all 14 remaining filing row(s)
| Transaction date | Published | Filer | Role | Transaction | Instrument | Price (local currency) | Quote currency | Volume | Reported value (local currency) | Source |
|---|---|---|---|---|---|---|---|---|---|---|
| 2026-06-02 | 2026-06-03 | SCULLY WILLIAM P | TenPercentOwner | Open market purchase | Ordinary Shares, par value $0.01 per share | 9.43 USD | USD | 50000.0 | 471500.0 USD | Open filing |
| 2026-05-22 | 2026-05-26 | SCULLY WILLIAM P | TenPercentOwner | Open market purchase | Ordinary Shares, par value $0.01 per share | 9.81 USD | USD | 100000.0 | 981000.0 USD | Open filing |
| 2026-09-29 | 2026-09-30 | SCULLY WILLIAM P | TenPercentOwner | Open market purchase | Ordinary Shares, par value $0.01 per share | 8.68 USD | USD | 162000.0 | 1406160.0 USD | Open filing |
| 2026-09-28 | 2026-09-29 | SCULLY WILLIAM P | TenPercentOwner | Open market purchase | Ordinary Shares, par value $0.01 per share | 8.6 USD | USD | 103500.0 | 890100.0 USD | Open filing |
| 2026-09-18 | 2026-09-21 | SCULLY WILLIAM P | TenPercentOwner | Open market purchase | Ordinary Shares, par value $0.01 per share | 8.43 USD | USD | 100000.0 | 843000.0 USD | Open filing |
| 2026-09-02 | 2026-09-03 | SCULLY WILLIAM P | TenPercentOwner | Open market purchase | Ordinary Shares, par value $0.01 per share | 9.47 USD | USD | 27000.0 | 255690.00000000003 USD | Open filing |
| 2026-08-20 | 2026-08-21 | SCULLY WILLIAM P | TenPercentOwner | Open market purchase | Ordinary Shares, par value $0.01 per share | 8.79 USD | USD | 50000.0 | 439499.99999999994 USD | Open filing |
| 2026-08-07 | 2026-08-10 | SCULLY WILLIAM P | TenPercentOwner | Open market purchase | Ordinary Shares, par value $0.01 per share | 8.62 USD | USD | 3500.0 | 30169.999999999996 USD | Open filing |
| 2026-08-07 | 2026-08-10 | SCULLY WILLIAM P | TenPercentOwner | Open market purchase | Ordinary Shares, par value $0.01 per share | 8.62 USD | USD | 34000.0 | 293080.0 USD | Open filing |
| 2026-10-02 | 2026-10-06 | SCULLY WILLIAM P | TenPercentOwner | Open market purchase | Ordinary Shares, par value $0.01 per share | 8.5724 USD | USD | 100000 | 857240.0 USD | Open filing |
| 2026-10-08 | 2026-10-09 | SCULLY WILLIAM P | TenPercentOwner | Open market purchase | Ordinary Shares, par value $0.01 per share | 8.5656 USD | USD | 90000 | 770904.0 USD | Open filing |
| 2026-10-07 | 2026-10-09 | SCULLY WILLIAM P | TenPercentOwner | Open market purchase | Ordinary Shares, par value $0.01 per share | 8.4012 USD | USD | 125000 | 1050150.0 USD | Open filing |
| 2026-10-14 | 2026-10-15 | SCULLY WILLIAM P | TenPercentOwner | Open market purchase | Ordinary Shares, par value $0.01 per share | 8.4569 USD | USD | 10000 | 84568.99999999999 USD | Open filing |
| 2026-10-13 | 2026-10-15 | SCULLY WILLIAM P | TenPercentOwner | Open market purchase | Ordinary Shares, par value $0.01 per share | 8.3548 USD | USD | 100000 | 835479.9999999999 USD | Open filing |
Showing 17 of 17 matching raw-feed row(s) from the current 365-day research window. Prices and reported values remain in the filing currency and its major unit (for example, UK pence are parsed as GBP). The screen-level $ aggregate is separately FX-normalised for research ranking, not a trade-date conversion.
Other disclosed transactions · excluded from score
View 21 other transaction(s)
Jun 15, 2026Bona fide gift
SCULLY WILLIAM P · TenPercentOwner
Ordinary Shares, par value $0.01 per share · 325000.0 shares × 0.0 USD · 0.0 USD
Open filingAug 18, 2026Bona fide gift
SCULLY WILLIAM P · TenPercentOwner
Ordinary Shares, par value $0.01 per share · 627553.0 shares × 0.0 USD · 0.0 USD
Open filingAug 17, 2026Bona fide gift
SCULLY WILLIAM P · TenPercentOwner
Ordinary Shares, par value $0.01 per share · 336000.0 shares × 0.0 USD · 0.0 USD
Open filingUnfold all 18 remaining filing row(s)
| Transaction date | Published | Filer | Role | Transaction | Instrument | Price (local currency) | Quote currency | Volume | Reported value (local currency) | Source |
|---|---|---|---|---|---|---|---|---|---|---|
| 2026-08-10 | 2026-08-11 | SCULLY WILLIAM P | TenPercentOwner | Bona fide gift | Ordinary Shares, par value $0.01 per share | 0.0 USD | USD | 251553.0 | 0.0 USD | Open filing |
| 2026-07-29 | 2026-07-30 | Kingston Anne Evans | Chief Strategy Officer | Open market sale | Ordinary Shares, par value $0.01 per share | 8.47 USD | USD | 7662.0 | 64897.14000000001 USD | Open filing |
| 2026-07-29 | 2026-07-30 | Isaacs Michael John | General Counsel & Company Sec. | Open market sale | Ordinary Shares, par value $0.01 per share | 8.47 USD | USD | 8386.0 | 71029.42 USD | Open filing |
| 2026-07-28 | 2026-07-30 | Zago Wagner M. | Chief Scientific Officer | Disposition to the issuer | Ordinary Shares, par value $0.01 per share | 8.56 USD | USD | 51000.0 | 436560.0 USD | Open filing |
| 2026-07-28 | 2026-07-30 | Zago Wagner M. | Chief Scientific Officer | Exercise of derivative security | Ordinary Shares, par value $0.01 per share | — | USD | 51000.0 | 0.0 USD | Open filing |
| 2026-07-28 | 2026-07-30 | Walker Karin L | Chief Accounting Officer | Disposition to the issuer | Ordinary Shares, par value $0.01 per share | 8.56 USD | USD | 15000.0 | 128400.00000000001 USD | Open filing |
| 2026-07-28 | 2026-07-30 | Walker Karin L | Chief Accounting Officer | Exercise of derivative security | Ordinary Shares, par value $0.01 per share | — | USD | 15000.0 | 0.0 USD | Open filing |
| 2026-07-28 | 2026-07-30 | Swanson Chad J. | Chief Development Officer | Exercise of derivative security | Ordinary Shares, par value $0.01 per share | — | USD | 51000.0 | 0.0 USD | Open filing |
| 2026-07-28 | 2026-07-30 | Swanson Chad J. | Chief Development Officer | Shares withheld for tax or exercise price | Ordinary Shares, par value $0.01 per share | 8.56 USD | USD | 3467.0 | 29677.52 USD | Open filing |
| 2026-07-28 | 2026-07-30 | Swanson Chad J. | Chief Development Officer | Disposition to the issuer | Ordinary Shares, par value $0.01 per share | 8.56 USD | USD | 40800.0 | 349248.0 USD | Open filing |
| 2026-07-28 | 2026-07-30 | Smith Brandon S. | Chief Operating Officer | Exercise of derivative security | Ordinary Shares, par value $0.01 per share | — | USD | 78000.0 | 0.0 USD | Open filing |
| 2026-07-28 | 2026-07-30 | Smith Brandon S. | Chief Operating Officer | Disposition to the issuer | Ordinary Shares, par value $0.01 per share | 8.56 USD | USD | 78000.0 | 667680.0 USD | Open filing |
| 2026-07-28 | 2026-07-30 | Nguyen Tran | Chief Strategy Officer and CFO | Exercise of derivative security | Ordinary Shares, par value $0.01 per share | — | USD | 57000.0 | 0.0 USD | Open filing |
| 2026-07-28 | 2026-07-30 | Nguyen Tran | Chief Strategy Officer and CFO | Disposition to the issuer | Ordinary Shares, par value $0.01 per share | 8.56 USD | USD | 57000.0 | 487920.0 USD | Open filing |
| 2026-07-28 | 2026-07-30 | Kinney Gene G. | President and CEO | Exercise of derivative security | Ordinary Shares, par value $0.01 per share | — | USD | 84000.0 | 0.0 USD | Open filing |
| 2026-07-28 | 2026-07-30 | Kinney Gene G. | President and CEO | Disposition to the issuer | Ordinary Shares, par value $0.01 per share | 8.56 USD | USD | 84000.0 | 719040.0 USD | Open filing |
| 2026-07-28 | 2026-07-30 | Kingston Anne Evans | Chief Strategy Officer | Shares withheld for tax or exercise price | Ordinary Shares, par value $0.01 per share | 8.56 USD | USD | 3498.0 | 29942.88 USD | Open filing |
| 2026-07-28 | 2026-07-30 | Isaacs Michael John | General Counsel & Company Sec. | Shares withheld for tax or exercise price | Ordinary Shares, par value $0.01 per share | 8.56 USD | USD | 4694.0 | 40180.64 USD | Open filing |
Showing 21 of 21 matching raw-feed row(s) from the current 365-day research window. Prices and reported values remain in the filing currency and its major unit (for example, UK pence are parsed as GBP). The screen-level $ aggregate is separately FX-normalised for research ranking, not a trade-date conversion.
Snapshot & identity
- Snapshot date
- 2026-10-18
- Ticker
- PRTA
- ISIN
- —
- Sector
- Healthcare
- Industry
- —
Company logos by Parqet
How to read Form 4 transaction codes
| Code | Interpretation | Screen treatment |
|---|---|---|
| P | Open-market / private purchase | Buy evidence when the security is qualifying equity |
| S | Sale | Sell evidence when the security is qualifying equity |
| A | Grant / award | Context only |
| F | Tax-related withholding | Context only |
| M | Option exercise | Context only |
| G | Gift | Context only |
| J / L | Other / non-directional | Context only |
P/S rows for options, warrants, compensation units and debt remain visible for audit but are excluded from equity scores and quotes.