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PTGX · Protagonist Therapeutics, Inc

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$152.61 -2.11 (-1.36%)
Market Cap
$10.01B
Shares
64.71M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 344
Total Value: $9,358,103,338
Total Shares: 76,354,423

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 344 13F filers · Δ vs Mar 31, 2026
Top Holder
13.5%
Sep 2023 → Jun 2026 · range 9.6% – 16.5%
−0.4 pts
Top 5
37.7%
Sep 2023 → Jun 2026 · range 37.7% – 46.8%
−4.9 pts
Top 10
56.5%
Sep 2023 → Jun 2026 · range 55.6% – 63.0%
−4.4 pts
HHI
459
Sep 2023 → Jun 2026 · range 439 – 592
Broadly held−55

Quarterly Activity

vs Mar 31, 2026
New
68
Increased
137
Decreased
88
Sold Out
39
Unchanged
51
Holder count: +29
Institutional value: +26.2%
Shares held: +8.6%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 355
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1377121 CUSIP 74366E102 13F (30d) 311 filings 300 filers Visit website Investor relations