Protagonist Therapeutics, Inc - Common Stock, par value $0.00001 per share (the "Shares") (PTGX)

Q: What does CUSIP 74366E102 represent in this 13F holders report?

CUSIP 74366E102 is the security identifier for PTGX - Protagonist Therapeutics, Inc - Common Stock, par value $0.00001 per share (the "Shares") used to aggregate holder disclosures.

Q: How many institutions held PTGX - Protagonist Therapeutics, Inc - Common Stock, par value $0.00001 per share (the "Shares") in Q3 2026?

6 institutional investors reported PTGX - Protagonist Therapeutics, Inc - Common Stock, par value $0.00001 per share (the "Shares") for Q3 2026. Use the holders table for investor-level position and value details.

CUSIP: 74366E102

Q3 2026 13F Holders as of 30 Sep 2026

Security type / class: Equity / Common Stock, par value $0.00001 per share (the "Shares")
Total 13F shares: 6,115
Total 13F value: $861,577
Share change: +2,395
SEC-reported price per share: $140.89
Number of holders: 6
Value change: +$337,459
Number of buys: 5
Shares outstanding: 64,395,586

Security key

74366E102

Report period

Q3 2026

Institutions

Top holders

PTGX full security history Ownership snapshot Full 13F holder table Protagonist Therapeutics, Inc SEC filings Protagonist Therapeutics, Inc company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 74366E102

Recent filing periods:

Q3 2026

Ownership snapshot

Top reported holders of PTGX - Protagonist Therapeutics, Inc - Common Stock, par value $0.00001 per share (the "Shares") (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

BlackRock, Inc.

Disclosed value leader

BlackRock, Inc.

Comparable rows

15/15

Latest evidence

08 Sep 2026

13F 13D/G 3/4/5 Lead comparable stake: 14% 13D/G row: BlackRock, Inc. Showing 1-6 of 15 holder rows.

Quick read

BlackRock, Inc. leads the comparable SEC ownership view at 14%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens BlackRock, Inc.'s linked filing trail.

Comparable ownership Top 5

BlackRock, Inc. 14%

FARALLON CAPITAL MANAGEMENT, L.L.C. 10%

Farallon Capital Partners, L.P. 10%

RTW INVESTMENTS, LP 8.1%

VANGUARD PORTFOLIO MANAGEMENT LLC 5.5%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
BlackRock, Inc.	13F 13D/G Company 13F 13D/G	14% from 13D/G	$1,263,534,678 10,307,837 shares	—	30 Jun 2026
FARALLON CAPITAL MANAGEMENT, L.L.C.	13D/G 13F Company 13D/G 13F	10%	$835,597,827 6,433,119 shares	$0	30 Jun 2026
Farallon Capital Partners, L.P.	13D/G Dapice Joshua J. 13D/G	10%	$545,701,455 6,248,013 shares	+$25,461,794	31 Dec 2025
RTW INVESTMENTS, LP	13F 13D/G Company 13F 13D/G	8.1% from 13D/G	$620,398,832 5,061,175 shares	—	30 Jun 2026
VANGUARD PORTFOLIO MANAGEMENT LLC	13F 13D/G Company · Vanguard Portfolio Management 13F 13D/G	5.5% from 13D/G	$444,879,349 3,629,298 shares	—	30 Jun 2026
STATE STREET CORP	13D/G 13F STATE STREET CORPORATION · Company 13D/G 13F	5.2%	$431,436,649 3,321,554 shares	+$26,594,978	30 Jun 2026

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q3 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

6,115

Rows available

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q3 2026 vs Q2 2026 Across Filers

Q2 2026 holders

342

Q3 2026 holders

Holder diff

-336

Investor	Q2 2026 Shares	Q3 2026 Shares	Share Diff	Share Chg %	Q2 2026 value	Q3 2026 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend