Prothena Corporation Public (PRTA) Trailing 12-Month Income Statement

Income Statement Summary

Prothena Corporation Public (PRTA) trailing twelve month income statement covering six trailing twelve month periods to June 30, 2026, as reported to the SEC.

Prothena Corporation Public reported total revenue of $54.53M in the twelve months ended June 30, 2026, up 427.3% from $10.34M a year earlier.
Income from operations was -$55.51M, a smaller loss than the $281.61M a year earlier. Operating margin was -101.8%.
Net Income was -$43.99M, a smaller loss than the $302.92M a year earlier. Net margin was -80.7%.
Diluted earnings per share was -$0.36, a smaller loss than the $2.34 a year earlier.
Research and development took 119.1% of total revenue and general and administrative 90.7%.

An income statement shows what a company sold and what it cost to run the business, ending with the profit left over.

Figures in USD thousands, except per share data

						Jun'26	Mar'26	Dec'25	Sep'25	Jun'25	Mar'25
Total revenue
54,530	57,940	9,684	11,786	10,341	137,935	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Total revenue						54,530	57,940	9,684	11,786	10,341	137,935	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Collaboration revenue
-	-	-	-	-	-	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Collaboration revenue						-	-	-	-	-	-	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Revenuerelated party
-	-	-	-	-	-	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Revenuerelated party						-	-	-	-	-	-	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Total revenue
-	-	-	-	-	-	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Total revenue						-	-	-	-	-	-	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Operating expenses:
Research and development
64,949	96,668	134,852	170,438	192,223	209,216	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Research and development						64,949	96,668	134,852	170,438	192,223	209,216	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
General and administrative
49,449	54,460	59,392	63,594	67,116	67,333	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
General and administrative						49,449	54,460	59,392	63,594	67,116	67,333	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Restructuring costs
-4,359	25,836	30,080	33,088	-	-	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Restructuring costs						-4,359	25,836	30,080	33,088	-	-	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Total operating expenses
110,039	176,964	224,324	267,120	291,948	276,549	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Total operating expenses						110,039	176,964	224,324	267,120	291,948	276,549	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Income (loss) from operations
-55,509	-119,024	-214,640	-255,334	-281,607	-138,614	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Income (loss) from operations						-55,509	-119,024	-214,640	-255,334	-281,607	-138,614	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Other income (expense):
Interest income
10,966	12,207	14,139	16,880	20,272	22,999	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Interest income						10,966	12,207	14,139	16,880	20,272	22,999	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Interest income
-	-	-	-	-	-	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Interest income						-	-	-	-	-	-	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Other income (expense), net
193	83	-328	-297	-340	-248	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Other income (expense), net						193	83	-328	-297	-340	-248	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Total other income, net
11,159	12,290	13,811	16,583	19,932	22,751	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Total other income, net						11,159	12,290	13,811	16,583	19,932	22,751	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Income (loss) before income taxes
-44,350	-106,734	-200,829	-238,751	-261,675	-115,863	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Income (loss) before income taxes						-44,350	-106,734	-200,829	-238,751	-261,675	-115,863	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Income (loss) before income taxes
-	-	-	-	-	-	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Income (loss) before income taxes						-	-	-	-	-	-	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Provision for income taxes
-334	44,464	43,263	41,580	41,180	-5,620	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Provision for income taxes						-334	44,464	43,263	41,580	41,180	-5,620	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Net Income (Loss)
-43,992	-151,176	-244,092	-280,459	-302,919	-110,266	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Net Income (Loss)						-43,992	-151,176	-244,092	-280,459	-302,919	-110,266	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Basic and diluted net loss per share (in dollars per share)
-	-	-	-	-	-	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Basic and diluted net loss per share (in dollars per share)						-	-	-	-	-	-	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Shares used to compute basic and diluted net loss per share (in shares)
-	-	-	-	-	-	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Shares used to compute basic and diluted net loss per share (in shares)						-	-	-	-	-	-	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Basic net income (loss) per ordinary share (in dollars per share)
-0.36	0.61	-0.39	-0.68	-2.34	-1.12	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Basic net income (loss) per ordinary share (in dollars per share)						-0.36	0.61	-0.39	-0.68	-2.34	-1.12	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Diluted net income (loss) per ordinary share (in dollars per share)
-0.36	0.60	-0.39	-0.68	-2.34	-1.12	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Diluted net income (loss) per ordinary share (in dollars per share)						-0.36	0.60	-0.39	-0.68	-2.34	-1.12	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Shares used to compute basic net income (loss) per share (in shares)
52,145	53,708	53,832	53,830	53,827	53,827	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Shares used to compute basic net income (loss) per share (in shares)						52,145	53,708	53,832	53,830	53,827	53,827	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Shares used to compute diluted net income (loss) per share (in shares)
52,145	54,109	53,832	53,830	53,827	53,827	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Shares used to compute diluted net income (loss) per share (in shares)						52,145	54,109	53,832	53,830	53,827	53,827	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Collaboration revenue
Total revenue
4,480	7,890	9,634	11,736	10,291	137,885	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Total revenue						4,480	7,890	9,634	11,736	10,291	137,885	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Revenue from license and intellectual property
Total revenue
50,050	50,050	50	50	50	50	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx
Total revenue						50,050	50,050	50	50	50	50	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx	xxxxx