In the 12 months to Nov 8, 2026, on the open market: bought $9.1M of PRTA. Filed a median of 1 business day after the trade.
Open-market purchases and sales this filer reported on SEC Form 4, by the day traded. Insiders have two business days to file. A sale marked 10b5-1 was made under a plan adopted in advance. How to read these
Insider purchases above the line: $9.1MInsider sales below: $0
Dollar value of open-market purchases and sales reported on SEC Form 4, by the month traded. Sales include pre-arranged 10b5-1 plan sales.
PRTABought: PROTHENA CORP PUBLIC LTD CO Oct 23, 202650,000 sharesfiled Oct 26, 20261,187,000 shares held directly after, as filedfiling$404K
PRTABought: PROTHENA CORP PUBLIC LTD CO Oct 22, 2026100,000 sharesfiled Oct 26, 20261,137,000 shares held directly after, as filedfiling$819K
PRTABought: PROTHENA CORP PUBLIC LTD CO Oct 14, 202610,000 sharesfiled Oct 15, 20261,037,000 shares held directly after, as filedfiling$85K
PRTABought: PROTHENA CORP PUBLIC LTD CO Oct 13, 2026100,000 sharesfiled Oct 15, 20261,027,000 shares held directly after, as filedfiling$835K
PRTABought: PROTHENA CORP PUBLIC LTD CO Oct 8, 202690,000 sharesfiled Oct 9, 2026529,000 shares held indirectly after, as filedfiling$771K
PRTABought: PROTHENA CORP PUBLIC LTD CO Oct 7, 2026125,000 sharesfiled Oct 9, 2026439,000 shares held indirectly after, as filedfiling$1.1M
PRTABought: PROTHENA CORP PUBLIC LTD CO Oct 2, 2026100,000 sharesfiled Oct 6, 2026314,000 shares held indirectly after, as filedfiling$857K
PRTABought: PROTHENA CORP PUBLIC LTD CO Sep 29, 2026162,000 sharesfiled Sep 30, 2026214,000 shares held indirectly after, as filedfiling$1.4M
PRTABought: PROTHENA CORP PUBLIC LTD CO Sep 28, 2026103,500 sharesfiled Sep 29, 2026187,000 shares held indirectly after, as filedfiling$890K
PRTABought: PROTHENA CORP PUBLIC LTD CO Sep 18, 2026100,000 sharesfiled Sep 21, 2026927,000 shares held directly after, as filedfiling$843K
PRTABought: PROTHENA CORP PUBLIC LTD CO Sep 2, 202627,000 sharesfiled Sep 3, 2026827,000 shares held directly after, as filedfiling$256K
PRTABought: PROTHENA CORP PUBLIC LTD CO Aug 20, 202650,000 sharesfiled Aug 21, 2026800,000 shares held directly after, as filedfiling$439K
PRTABought: PROTHENA CORP PUBLIC LTD CO Aug 7, 202637,500 sharesfiled Aug 10, 20262 transactionsfiling$323K
PRTABought: PROTHENA CORP PUBLIC LTD CO Jun 16, 202620,000 sharesfiled Jun 18, 2026756,000 shares held directly after, as filedfiling$158K
Source: SEC Form 4 filings. Value is shares × the price reported on the filing; a filing whose price failed Lytir's check against the market price is left out, and a trade that related owners reported on separate forms is counted once. Filings can be late, amended or wrong at the source; see methodology.
Other Form 4 entries
Not counted above: entries this filer reported on Form 4 in the same 12 months that are not open-market purchases or sales. Each entry is one line of a filing.
PRTA: gift (code G), 5 entries, Jun 15 to Oct 27, 2026
Code G
A gift of shares, made or received.
Source: the same SEC Form 4 filings. The codes are the SEC's own transaction codes; the meanings above are a plain-words reading of the SEC's Form 4 instructions.
