PROTAGONIST THERAPEUTICS INC (PTGX) Institutional Shareholders
PROTAGONIST THERAPEUTICS INC (PTGX) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $7.36B in PTGX holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of PTGX tracked by InsiderSet, reporting ownership valued at approximately $1.03B in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $1.34B, representing an estimated gain of +29.64% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 61% of the total disclosed PTGX value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Farallon Capital Management Llc, Ubs Group Ag, and several other long-term asset managers with concentrated positions in PROTAGONIST THERAPEUTICS INC (PTGX).
This page ranks the largest institutional PTGX shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
311
Total Reported Value
$7.36B
Largest Holder
Blackrock, Inc.
Largest Position
$1.03B
Insider Transactions (90d)
5
Latest Filing Quarter
Q2 2026
New Institutional Positions
58
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.02% | 9,779,369 | $1,030,745,507 | $1,336,252,980 | +$305,507,473 | +29.64% | |
| Farallon Capital Management Llc | 4.36% | 6,348,906 | $669,174,692 | $867,514,516 | +$198,339,824 | +29.64% | |
| Ubs Group Ag | 0.10% | 5,177,796 | $545,739,698 | $707,494,045 | +$161,754,347 | +29.64% | |
| Rtw Investments, Lp | 5.31% | 5,059,053 | $533,224,186 | $691,269,002 | +$158,044,816 | +29.64% | |
| Wellington Management Group Llp | 0.07% | 3,599,644 | $379,402,479 | $491,855,356 | +$112,452,877 | +29.64% | |
| State Street Corp | 0.01% | 3,116,749 | $328,505,345 | $425,872,583 | +$97,367,238 | +29.64% | |
| Janus Henderson Group Plc | 0.15% | 2,891,527 | $304,866,424 | $395,098,249 | +$90,231,825 | +29.60% | |
| Johnson & Johnson | 39.57% | 2,449,183 | $258,143,888 | $334,656,365 | +$76,512,477 | +29.64% | |
| Invesco Ltd. | 0.03% | 2,164,670 | $228,156,218 | $295,780,509 | +$67,624,291 | +29.64% | |
| Geode Capital Management, Llc | 0.01% | 1,669,371 | $175,982,148 | $228,102,853 | +$52,120,705 | +29.62% | |
| Citadel Advisors Llc | 0.12% | 1,551,900 | $163,570,260 | $212,051,616 | +$48,481,356 | +29.64% | |
| Woodline Partners Lp | 0.56% | 1,414,173 | $149,053,834 | $193,232,599 | +$44,178,765 | +29.64% | |
| Bank Of America Corp | 0.01% | 1,295,434 | $136,538,743 | $177,008,102 | +$40,469,359 | +29.64% | |
| Perceptive Advisors Llc | 2.57% | 1,230,879 | $129,734,647 | $168,187,307 | +$38,452,660 | +29.64% | |
| Jennison Associates Llc | 0.08% | 1,072,011 | $112,989,961 | $146,479,583 | +$33,489,622 | +29.64% | |
| Morgan Stanley | 0.01% | 1,018,222 | $107,320,718 | $139,129,854 | +$31,809,136 | +29.64% | |
| Adar1 Capital Management, Llc | 6.30% | 994,119 | $104,780,143 | $135,836,420 | +$31,056,277 | +29.64% | |
| Hood River Capital Management Llc | 0.88% | 829,285 | $87,406,639 | $113,313,502 | +$25,906,863 | +29.64% | |
| Goldman Sachs Group Inc | 0.01% | 778,945 | $82,100,804 | $106,435,045 | +$24,334,241 | +29.64% | |
| Driehaus Capital Management Llc | 0.56% | 720,928 | $75,985,811 | $98,507,602 | +$22,521,791 | +29.64% | |
| Fmr Llc | 0.00% | 661,997 | $69,774,496 | $90,455,270 | +$20,680,774 | +29.64% | |
| Pictet Asset Management Holding Sa | 0.07% | 567,990 | $69,624,214 | $77,610,154 | +$7,985,940 | +11.47% | |
| Marshall Wace, Llp | 0.07% | 628,075 | $66,199,102 | $85,820,168 | +$19,621,066 | +29.64% | |
| Clearbridge Investments, Llc | 0.06% | 621,820 | $65,539,829 | $84,965,485 | +$19,425,656 | +29.64% | |
| Alyeska Investment Group, L.P. | 0.18% | 593,197 | $62,522,964 | $81,054,438 | +$18,531,474 | +29.64% | |
| Northern Trust Corp | 0.01% | 587,968 | $61,971,828 | $80,339,948 | +$18,368,120 | +29.64% | |
| Nationale-Nederlanden Powszechne Towarzystwo Emerytalne S.A. | 5.11% | 571,825 | $60,270,355 | $78,134,168 | +$17,863,813 | +29.64% | |
| Charles Schwab Investment Management Inc | 0.01% | 552,956 | $58,281,562 | $75,555,908 | +$17,274,346 | +29.64% | |
| American Century Companies Inc | 0.03% | 537,320 | $56,633,738 | $73,419,405 | +$16,785,667 | +29.64% | |
| Dimensional Fund Advisors Lp | 0.01% | 508,103 | $53,541,525 | $69,427,194 | +$15,885,669 | +29.67% | |
| Voya Investment Management Llc | 0.05% | 454,383 | $47,891,968 | $62,086,893 | +$14,194,925 | +29.64% | |
| Rubric Capital Management Lp | 0.55% | 427,998 | $45,110,989 | $58,481,647 | +$13,370,658 | +29.64% | |
| Principal Financial Group Inc | 0.02% | 367,822 | $38,768,440 | $50,259,198 | +$11,490,758 | +29.64% | |
| 683 Capital Management, Llc | 3.47% | 355,000 | $37,417,000 | $48,507,200 | +$11,090,200 | +29.64% | |
| Bank Of New York Mellon Corp | 0.01% | 341,465 | $35,990,410 | $46,657,778 | +$10,667,368 | +29.64% | |
| Stephens Investment Management Group Llc | 0.37% | 281,832 | $34,546,967 | $38,509,524 | +$3,962,557 | +11.47% | |
| Vestal Point Capital, Lp | 0.96% | 326,159 | $34,377,159 | $44,566,366 | +$10,189,207 | +29.64% | |
| Bnp Paribas Asset Management Holding S.A. | 0.04% | 306,037 | $32,256,300 | $41,816,896 | +$9,560,596 | +29.64% | |
| Adage Capital Partners Gp, L.L.C. | 0.05% | 282,436 | $29,768,754 | $38,592,055 | +$8,823,301 | +29.64% | |
| Seb Asset Management Ab | 0.10% | 232,416 | $24,496,615 | $31,757,322 | +$7,260,707 | +29.64% | |
| Nextbio Capital Management Lp | 11.24% | 229,619 | $24,201,843 | $31,375,140 | +$7,173,297 | +29.64% | |
| Public Sector Pension Investment Board | 0.07% | 210,280 | $22,163,512 | $28,732,659 | +$6,569,147 | +29.64% | |
| Holocene Advisors, Lp | 0.05% | 209,916 | $22,125,146 | $28,682,922 | +$6,557,776 | +29.64% | |
| Segall Bryant & Hamill, Llc | 0.34% | 216,056 | $20,845,084 | $29,521,892 | +$8,676,808 | +41.63% | |
| Bnp Paribas Financial Markets | 0.01% | 194,530 | $20,503,462 | $26,580,579 | +$6,077,117 | +29.64% | |
| Nan Fung Trinity (Hk) Ltd | 1.94% | 160,670 | $19,694,929 | $21,953,949 | +$2,259,020 | +11.47% | |
| Td Asset Management Inc | 0.02% | 183,700 | $19,361,980 | $25,100,768 | +$5,738,788 | +29.64% | |
| Eagle Health Investments Lp | 3.97% | 179,322 | $18,900,539 | $24,502,558 | +$5,602,019 | +29.64% | |
| Fisher Asset Management, Llc | 0.01% | 173,971 | $18,336,542 | $23,771,397 | +$5,434,855 | +29.64% | |
| Affinity Asset Advisors, Llc | 1.06% | 172,125 | $18,141,975 | $23,519,160 | +$5,377,185 | +29.64% |
Frequently asked questions about PTGX
Who owns the most PTGX stock?
The largest holders of PTGX are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for PROTAGONIST THERAPEUTICS INC (PTGX).
Is PTGX widely held by superinvestors?
Many widely followed stocks like PTGX appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly PTGX is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.