Protagonist Therapeutics, Inc - COMMON STOCK (PTGX)

CUSIP: 74366E102

Q1 2026 13F Holders as of 31 Mar 2026

Security type / class
Equity / COMMON STOCK
Total 13F shares
78,748,068
Total 13F value
$8,296,612,447
Holder snapshot 6 visible 7 signals
Share change
+6,394,269
Put/Call ratio
23%
SEC-reported price per share
$105.40
Number of holders
317
Value change
+$705,562,894
Number of buys
158
Open additional details 1 more signal available
Number of sells
148
Security identity Names, identifiers, and filing context for this profile. 1 source field
Shares outstanding
63,608,245

Security key

74366E102

Report period

Q1 2026

Institutions

317

Top holders

10

PTGX full security history Ownership snapshot Full 13F holder table Previous quarter: Q4 2025 Protagonist Therapeutics, Inc SEC filings Protagonist Therapeutics, Inc company facts

Broader feeds

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

Ownership snapshot

Top reported holders of PTGX - Protagonist Therapeutics, Inc - COMMON STOCK (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
31 Mar 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 Partners, L.P. 10%
RTW INVESTMENTS, LP 8.1%
VANGUARD PORTFOLIO MANAGEMENT LLC 5.5%
WELLINGTON MANAGEMENT GROUP LLP 5.1%

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
$848,595,367
9,715,999 shares
 — 31 Dec 2025
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
$441,857,689
5,059,053 shares
 — 31 Dec 2025
VANGUARD PORTFOLIO MANAGEMENT LLC
13D/G
Vanguard Portfolio Management
13D/G
5.5%
$372,379,781
3,533,015 shares
 $0 31 Mar 2026
WELLINGTON MANAGEMENT GROUP LLP
13F 13D/G
Company
13F 13D/G
5.1%
from 13D/G
$276,992,086
3,171,423 shares
 — 31 Dec 2025
VANGUARD CAPITAL MANAGEMENT LLC
13D/G
Vanguard Capital Management
13D/G
5.1%
$342,550,316
3,250,003 shares
 $0 31 Mar 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 Q1 2026

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

Institutions
317
Shares
78,748,068
Rows available
317
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 Q1 2026 vs Q4 2025 Across Filers

Q4 2025 holders
311
Q1 2026 holders
317
Holder diff
6
Investor Q4 2025 Shares Q1 2026 Shares Share Diff Share Chg % Q4 2025 value Q1 2026 value Value change Value Chg %

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

Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
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