{"ticker":"PRTA","name":"Prothena Corporation plc","page_url":null,"cite_as":"TickerInside, Prothena Corporation plc (PRTA), holders from each covered fund's own file and from SEC Form N-PORT filings, each dated, prices through 2026-10-28, https://tickerinside.com/api/v1/sec/prta.json, CC BY 4.0","cite_html":"<a href=\"https://tickerinside.com/api/v1/sec/prta.json\">TickerInside</a> (https://tickerinside.com/api/v1/sec/prta.json)","sector":"US Listed","industry":null,"identifiers":{"asset_type":"stock","exchange":"Nasdaq","composite_figi":"BBG003PDKJF7","share_class_figi":"BBG00393H6N0","cik":"0001559053","series_id":null,"class_id":null},"as_of":"2026-10-28","page":false,"cap_b":0.5,"pe":null,"yield":0.0,"vol":57.2,"beta":0.89,"mdd3":-88.7,"r1":-21.9,"r3":-77.6,"r5":-85.7,"last_close":8.4,"last_close_date":"2026-10-26","day_change_pct":2.44,"high_52w":11.51,"low_52w":7.91,"currency":"USD","calendar":{"2022":22.0,"2023":-39.7,"2024":-61.9,"2025":-31.0,"2026":-12.0},"held_by":14,"heaviest":["IBRN",0.6023],"held_by_sec_nport":22,"holders":[["IBRN",0.6023,"2026-10-27"],["QQQS",0.4989,"2026-10-24"],["XBI",0.0789,"2026-10-27"],["IBBQ",0.0281,"2026-10-24"],["IBB",0.0275,"2026-10-27"],["PRFZ",0.0157,"2026-10-24"],["IWO",0.0149,"2026-10-27"],["IWMW",0.0128,"2026-10-27"],["IWM",0.0127,"2026-10-27"],["RSSL",0.01,"2026-10-28"],["IWN",0.0096,"2026-10-27"],["SMMD",0.0052,"2026-10-27"],["ITOT",0.0005,"2026-10-27"],["IWV",0.0005,"2026-10-27"]],"holders_sec_nport":[["BBC",0.6594,"2026-07-31"],["FSCC",0.4225,"2026-08-31"],["GSSC",0.0327,"2026-08-31"],["AVSC",0.0301,"2026-05-31"],["VTWV",0.0254,"2026-05-31"],["PWS",0.0228,"2026-07-31"],["RESM",0.0144,"2026-06-30"],["VTWO",0.0131,"2026-05-31"],["SCHA",0.0083,"2026-08-31"],["VHT",0.0073,"2026-05-31"],["DFAS",0.0064,"2026-07-31"],["DXUV",0.0055,"2026-07-31"],["VXF",0.0048,"2026-06-30"],["VTWG",0.0021,"2026-05-31"],["DCOR",0.0014,"2026-07-31"],["AVTM",0.0012,"2026-05-31"],["DFAC",0.0012,"2026-07-31"],["DFAU",0.0011,"2026-07-31"],["DFSU",0.0007,"2026-07-31"],["SCHB",0.0005,"2026-08-31"],["VTHR",0.0005,"2026-05-31"],["DFUS",0.0004,"2026-07-31"]],"synthetic_exposure":[],"left_out":null,"same_code_abroad":[],"earlier_key_reads_as":null,"etf_ownership":{"pct_lower_bound":7.22,"basis":"company","company":"Prothena Corporation plc","shares_held":3711312,"shares_held_by_layer":{"issuer_files":2934930,"sec_nport":776382},"shares_outstanding":51336974,"shares_outstanding_as_of":"2026-07-30","shares_outstanding_filing":"https://www.sec.gov/Archives/edgar/data/1559053/000155905326000022/","funds_holding":{"issuer_files":14,"sec_nport":22},"funds_counted":{"issuer_files":12,"sec_nport":16},"funds_prorated":0,"not_counted":{"through_fund":2,"whole_series":6},"rows_not_counted":{"through_fund":2,"whole_series":6},"holdings_dates":{"oldest":"2026-05-31","newest":"2026-10-28"},"holdings_dates_by_layer":{"issuer_files":{"oldest":"2026-10-24","newest":"2026-10-28"},"sec_nport":{"oldest":"2026-05-31","newest":"2026-08-31"}},"classes":null,"refused":null,"refused_reason":null,"held_back":null,"method":"ti-ownership/1","method_url":"https://tickerinside.com/api/v1/methods.json","cite_as":"TickerInside, Prothena Corporation plc (PRTA), at least 7.22% of its shares outstanding held by 28 covered US ETFs (ti-ownership/1), holdings dated 2026-05-31 to 2026-10-28, shares outstanding as of 2026-07-30 from SEC filings, https://tickerinside.com/api/v1/sec/prta.json, CC BY 4.0","cite_html":"<a href=\"https://tickerinside.com/api/v1/sec/prta.json\">TickerInside</a> (https://tickerinside.com/api/v1/sec/prta.json)"},"etf_holders_since_2019":{"answer":"33 of today's US stock ETFs held PRTA in their SEC reports for the second quarter of 2026, against 22 for the fourth quarter of 2019.","counted":"Today's US stock ETFs, in their reports on SEC Form N-PORT, each counted once a quarter by its report for a period ended in it.","quarters":[{"quarter":"2019Q4","etfs":22,"largest_weight_etf":"BBC","largest_weight_pct":1.0453},{"quarter":"2020Q1","etfs":22,"largest_weight_etf":"IWC","largest_weight_pct":0.1709},{"quarter":"2020Q2","etfs":23,"largest_weight_etf":"XBI","largest_weight_pct":0.1237},{"quarter":"2020Q3","etfs":26,"largest_weight_etf":"BBC","largest_weight_pct":0.9918},{"quarter":"2020Q4","etfs":25,"largest_weight_etf":"BBC","largest_weight_pct":0.8922},{"quarter":"2021Q1","etfs":26,"largest_weight_etf":"SBIO","largest_weight_pct":0.5829},{"quarter":"2021Q2","etfs":33,"largest_weight_etf":"BBC","largest_weight_pct":1.328},{"quarter":"2021Q3","etfs":44,"largest_weight_etf":"PTH","largest_weight_pct":2.1463},{"quarter":"2021Q4","etfs":48,"largest_weight_etf":"PBE","largest_weight_pct":2.4179},{"quarter":"2022Q1","etfs":51,"largest_weight_etf":"PBE","largest_weight_pct":1.9181},{"quarter":"2022Q2","etfs":51,"largest_weight_etf":"PBE","largest_weight_pct":2.4488},{"quarter":"2022Q3","etfs":45,"largest_weight_etf":"PBE","largest_weight_pct":2.9792},{"quarter":"2022Q4","etfs":45,"largest_weight_etf":"IBRN","largest_weight_pct":7.2813},{"quarter":"2023Q1","etfs":43,"largest_weight_etf":"IBRN","largest_weight_pct":3.5309},{"quarter":"2023Q2","etfs":45,"largest_weight_etf":"IBRN","largest_weight_pct":3.9458},{"quarter":"2023Q3","etfs":49,"largest_weight_etf":"IBRN","largest_weight_pct":3.9965},{"quarter":"2023Q4","etfs":43,"largest_weight_etf":"SBIO","largest_weight_pct":1.4721},{"quarter":"2024Q1","etfs":36,"largest_weight_etf":"SBIO","largest_weight_pct":0.9141},{"quarter":"2024Q2","etfs":35,"largest_weight_etf":"IBRN","largest_weight_pct":1.9321},{"quarter":"2024Q3","etfs":39,"largest_weight_etf":"IBRN","largest_weight_pct":2.0331},{"quarter":"2024Q4","etfs":39,"largest_weight_etf":"IBRN","largest_weight_pct":1.4054},{"quarter":"2025Q1","etfs":39,"largest_weight_etf":"IBRN","largest_weight_pct":1.4322},{"quarter":"2025Q2","etfs":41,"largest_weight_etf":"IBRN","largest_weight_pct":0.8964},{"quarter":"2025Q3","etfs":32,"largest_weight_etf":"BBC","largest_weight_pct":1.0886},{"quarter":"2025Q4","etfs":30,"largest_weight_etf":"BBC","largest_weight_pct":1.2071},{"quarter":"2026Q1","etfs":27,"largest_weight_etf":"BBC","largest_weight_pct":0.6519},{"quarter":"2026Q2","etfs":33,"largest_weight_etf":"BBC","largest_weight_pct":0.7892}],"method":"https://tickerinside.com/how-the-numbers-are-produced/#sec-history"},"holders_all":[["BBC",0.6594,"2026-07-31","sec_nport",100,131,0.306],["IBRN",0.6023,"2026-10-27","issuer",39,68,null],["QQQS",0.4989,"2026-10-24","issuer",97,199,null],["FSCC",0.4225,"2026-08-31","sec_nport",76,310,1.54],["XBI",0.0789,"2026-10-27","issuer",145,159,8.21],["GSSC",0.0327,"2026-08-31","sec_nport",1006,1410,0.353],["AVSC",0.0301,"2026-05-31","sec_nport",804,1520,0.839],["IBBQ",0.0281,"2026-10-24","issuer",194,246,null],["IBB",0.0275,"2026-10-27","issuer",176,237,3.08],["VTWV",0.0254,"2026-05-31","sec_nport",761,1424,null],["PWS",0.0228,"2026-07-31","sec_nport",307,335,0.00549],["PRFZ",0.0157,"2026-10-24","issuer",1143,1481,0.42],["IWO",0.0149,"2026-10-27","issuer",774,1116,2.1],["RESM",0.0144,"2026-06-30","sec_nport",955,1037,0.000528],["VTWO",0.0131,"2026-05-31","sec_nport",1239,1945,null],["IWMW",0.0128,"2026-10-27","issuer",1337,1969,null],["IWM",0.0127,"2026-10-27","issuer",1334,1969,9.91],["RSSL",0.01,"2026-10-28","issuer",1236,1781,0.14],["IWN",0.0096,"2026-10-27","issuer",1129,1267,1.3],["SCHA",0.0083,"2026-08-31","sec_nport",1421,1705,1.9],["VHT",0.0073,"2026-05-31","sec_nport",317,398,null],["DFAS",0.0064,"2026-07-31","sec_nport",1499,2037,0.98],["DXUV",0.0055,"2026-07-31","sec_nport",1402,2034,0.03],["SMMD",0.0052,"2026-10-27","issuer",1843,2482,0.21],["VXF",0.0048,"2026-06-30","sec_nport",1826,3289,null],["VTWG",0.0021,"2026-05-31","sec_nport",999,1123,null],["DCOR",0.0014,"2026-07-31","sec_nport",1799,2381,0.047],["AVTM",0.0012,"2026-05-31","sec_nport",1089,1545,0.0093],["DFAC",0.0012,"2026-07-31","sec_nport",1925,2528,0.57],["DFAU",0.0011,"2026-07-31","sec_nport",1726,2179,0.14],["DFSU",0.0007,"2026-07-31","sec_nport",1670,1932,0.02],["ITOT",0.0005,"2026-10-27","issuer",2267,2430,0.5],["IWV",0.0005,"2026-10-27","issuer",2323,2586,0.1],["SCHB",0.0005,"2026-08-31","sec_nport",2160,2372,0.2],["VTHR",0.0005,"2026-05-31","sec_nport",2283,2904,null],["DFUS",0.0004,"2026-07-31","sec_nport",1877,2222,0.08]],"rank_summary":{"funds":36,"top_holding_in":0,"top10_in":0,"funds_without_value":10,"short_positions":0,"by_layer":{"issuer":{"funds":14,"top_holding_in":0,"top10_in":0},"sec_nport":{"funds":22,"top_holding_in":0,"top10_in":0}}},"top_by_value":[{"fund":"IWM","value_usd_m":9.91,"weight":0.0127,"holdings_as_of":"2026-10-27","layer":"issuer","net_assets_b":78.0,"net_assets_basis":"fund","net_assets_as_of":"2026-10-29"},{"fund":"XBI","value_usd_m":8.21,"weight":0.0789,"holdings_as_of":"2026-10-27","layer":"issuer","net_assets_b":10.4,"net_assets_basis":"fund","net_assets_as_of":"2026-10-29"},{"fund":"IBB","value_usd_m":3.08,"weight":0.0275,"holdings_as_of":"2026-10-27","layer":"issuer","net_assets_b":11.2,"net_assets_basis":"fund","net_assets_as_of":"2026-10-29"},{"fund":"IWO","value_usd_m":2.1,"weight":0.0149,"holdings_as_of":"2026-10-27","layer":"issuer","net_assets_b":14.1,"net_assets_basis":"fund","net_assets_as_of":"2026-10-29"},{"fund":"SCHA","value_usd_m":1.9,"weight":0.0083,"holdings_as_of":"2026-08-31","layer":"sec_nport","net_assets_b":22.6462,"net_assets_basis":"filing","net_assets_as_of":"2026-08-31"},{"fund":"FSCC","value_usd_m":1.54,"weight":0.4225,"holdings_as_of":"2026-08-31","layer":"sec_nport","net_assets_b":0.3635,"net_assets_basis":"filing","net_assets_as_of":"2026-08-31"},{"fund":"IWN","value_usd_m":1.3,"weight":0.0096,"holdings_as_of":"2026-10-27","layer":"issuer","net_assets_b":13.8,"net_assets_basis":"fund","net_assets_as_of":"2026-10-29"},{"fund":"DFAS","value_usd_m":0.98,"weight":0.0064,"holdings_as_of":"2026-07-31","layer":"sec_nport","net_assets_b":15.3058,"net_assets_basis":"filing","net_assets_as_of":"2026-07-31"},{"fund":"AVSC","value_usd_m":0.839,"weight":0.0301,"holdings_as_of":"2026-05-31","layer":"sec_nport","net_assets_b":2.787,"net_assets_basis":"filing","net_assets_as_of":"2026-05-31"},{"fund":"DFAC","value_usd_m":0.57,"weight":0.0012,"holdings_as_of":"2026-07-31","layer":"sec_nport","net_assets_b":47.8895,"net_assets_basis":"filing","net_assets_as_of":"2026-07-31"}],"membership":[{"fund":"VOO","kind":"broad","category":"US Large Blend","held":false,"weight":null,"rank_in_fund":null,"positions":504,"holdings_as_of":"2026-06-30","layer":"sec_nport"},{"fund":"SPY","kind":"broad","category":"US Large Blend","held":false,"weight":null,"rank_in_fund":null,"positions":504,"holdings_as_of":"2026-10-27","layer":"issuer"},{"fund":"IVV","kind":"broad","category":"US Large Blend","held":false,"weight":null,"rank_in_fund":null,"positions":503,"holdings_as_of":"2026-10-27","layer":"issuer"},{"fund":"QQQ","kind":"broad","category":"US Large Blend","held":false,"weight":null,"rank_in_fund":null,"positions":101,"holdings_as_of":"2026-10-26","layer":"issuer"},{"fund":"VTI","kind":"broad","category":"US Large Blend","held":false,"weight":null,"rank_in_fund":null,"positions":3483,"holdings_as_of":"2026-06-30","layer":"sec_nport"},{"fund":"SCHD","kind":"broad","category":"US Large Value","held":false,"weight":null,"rank_in_fund":null,"positions":99,"holdings_as_of":"2026-08-31","layer":"sec_nport"},{"fund":"IBB","kind":"sector","category":"Health Care","held":true,"weight":0.0275,"rank_in_fund":176,"positions":237,"holdings_as_of":"2026-10-27","layer":"issuer"},{"fund":"XBI","kind":"sector","category":"Health Care","held":true,"weight":0.0789,"rank_in_fund":145,"positions":159,"holdings_as_of":"2026-10-27","layer":"issuer"},{"fund":"IBBQ","kind":"sector","category":"Health Care","held":true,"weight":0.0281,"rank_in_fund":194,"positions":246,"holdings_as_of":"2026-10-24","layer":"issuer"}],"by_issuer":[{"issuer":"iShares","funds":9,"value_usd_m":17.2,"funds_without_value":2,"heaviest":["IBRN",0.6023],"largest":["IWM",9.91]},{"issuer":"SPDR","funds":1,"value_usd_m":8.21,"funds_without_value":0,"heaviest":["XBI",0.0789],"largest":["XBI",8.21]},{"issuer":"Schwab","funds":2,"value_usd_m":2.1,"funds_without_value":0,"heaviest":["SCHA",0.0083],"largest":["SCHA",1.9]},{"issuer":"Dimensional","funds":7,"value_usd_m":1.87,"funds_without_value":0,"heaviest":["DFAS",0.0064],"largest":["DFAS",0.98]},{"issuer":"Federated Hermes","funds":1,"value_usd_m":1.54,"funds_without_value":0,"heaviest":["FSCC",0.4225],"largest":["FSCC",1.54]},{"issuer":"Avantis","funds":2,"value_usd_m":0.848,"funds_without_value":0,"heaviest":["AVSC",0.0301],"largest":["AVSC",0.839]}],"fee_per_1000":[{"fund":"QQQS","fee_usd_per_1000":400.88,"expense_ratio":0.2,"weight":0.4989,"holdings_as_of":"2026-10-24","layer":"issuer"},{"fund":"IBRN","fee_usd_per_1000":780.34,"expense_ratio":0.47,"weight":0.6023,"holdings_as_of":"2026-10-27","layer":"issuer"},{"fund":"FSCC","fee_usd_per_1000":852.07,"expense_ratio":0.36,"weight":0.4225,"holdings_as_of":"2026-08-31","layer":"sec_nport"},{"fund":"BBC","fee_usd_per_1000":985.74,"expense_ratio":0.65,"weight":0.6594,"holdings_as_of":"2026-07-31","layer":"sec_nport"},{"fund":"VTWV","fee_usd_per_1000":2362.2,"expense_ratio":0.06,"weight":0.0254,"holdings_as_of":"2026-05-31","layer":"sec_nport"}],"name_collision":null,"answer":"Prothena Corporation plc (PRTA) is held by 36 covered US ETFs (14 issuer files dated 2026-10-24 to 2026-10-28 and 22 SEC filings dated 2026-05-31 to 2026-08-31), weighs most in BBC (0.66%, 2026-07-31), is held in the largest amount by IWM (about $9.91 million, 2026-10-27), and at least 7.22% of its shares outstanding are held by 28 of them (shares outstanding as of 2026-07-30).","least_correlated":[["PM",-0.17,"Philip Morris International"],["UVV",-0.17,"Universal Corporation"],["CME",-0.16,"CME Group"],["CF",-0.14,"CF Industries"],["SU",-0.13,"Suncor Energy Inc."],["CHEF",-0.11,"The Chefs' Warehouse, Inc."],["ASAN",-0.11,"Asana, Inc."],["CCEP",-0.11,"Coca-Cola Europacific Partners plc"]],"most_correlated":[["PRME",0.45,"Prime Medicine, Inc."],["RCKT",0.44,"Rocket Pharmaceuticals, Inc."],["VYGR",0.44,"Voyager Therapeutics, Inc."],["BEAM",0.41,"Beam Therapeutics Inc."],["ARQT",0.39,"Arcutis Biotherapeutics, Inc."],["ENTA",0.39,"Enanta Pharmaceuticals, Inc."],["SMMT",0.39,"Summit Therapeutics Inc."],["PCVX",0.39,"Vaxcyte, Inc."]],"weekly":[-0.1126,0.0222,-0.0255,0.0512,0.0341,0.1084,-0.018,-0.0746,0.1189,-0.1473,-0.0467,-0.0127,-0.2102,0.1013,-0.0127,-0.0286,0.0481,0.0592,-0.1373,-0.0058,-0.0444,-0.0565,-0.0484,-0.0486,-0.0137,0.0987,-0.0693,0.0553,-0.1101,0.0384,0.0154,-0.0341,0.0524,-0.0391,-0.0184,0.1091,0.0494,0.036,-0.1343,-0.0284,0.0107,0.0453,0.0258,-0.0871,0.0876,-0.0226,-0.0722,-0.1591,0.0214,-0.0064,-0.1058,0.0882,0.0631,-0.2085,0.0421,0.1103,-0.1333,-0.0897,0.19,-0.0053,-0.0839,-0.0591,0.0552,0.1343,-0.089,-0.0126,0.0085,0.0981,0.0161,-0.0342,-0.1002,-0.056,0.0131,-0.1735,-0.0589,-0.0998,0.0543,-0.1237,-0.1259,-0.0336,-0.0836,-0.3024,0.1786,-0.061,0.126,0.0629,0.0584,-0.0054,-0.0219,0.0671,0.0195,0.1292,0.0728,0.063,-0.065,0.0427,-0.0398,-0.0171,0.166,0.0542,0.0131,-0.0129,-0.0101,0.0947,-0.0177,-0.0597,0.0554,0.0258,0.0298,-0.0641,-0.111,0.0358,-0.0356,-0.0011,0.0174,0.0695,-0.119,0.0114,0.0056,0.0067,-0.0388,0.1061,-0.0396,-0.0499,0.0583,0.0648,0.0649,0.0381,-0.0138,-0.0102,0.0085,-0.0904,0.0072,0.0356,-0.1365,-0.0614,0.0824,0.1221,-0.0329,-0.0464,-0.0628,0.0104,-0.072,0.0788,0.0114,0.0666,-0.0127,0.0525,-0.0906,-0.0392,-0.0338,0.0084,0.0574,-0.0554,-0.018,0.0244],"weeks_end":"2026-10-28","license":"CC BY 4.0","attribution":"Credit TickerInside with a link to the page the figure comes from (cite_as gives it) wherever the medium allows a link, and by name where it does not. How you mark the link is up to you.","source":"https://tickerinside.com/how-the-numbers-are-produced/"}