Parabilis Medicines, Inc. (PBLS) Institutional Shareholders
Parabilis Medicines, Inc. (PBLS) 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 $2.55B in PBLS holdings during the latest filing period.
Ra Capital Management, L.P. is currently the largest disclosed institutional shareholder of PBLS tracked by InsiderSet, reporting ownership valued at approximately $791.91M in its June 30, 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 $1.21B, representing an estimated gain of +52.47% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 80% of the total disclosed PBLS value among the investors covered in this analysis. Major shareholders include Ra Capital Management, L.P., Fmr Llc, Arch Venture Management, Llc, and several other long-term asset managers with concentrated positions in Parabilis Medicines, Inc. (PBLS).
This page ranks the largest institutional PBLS 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
73
Total Reported Value
$2.55B
Largest Holder
Ra Capital Management, L.P.
Largest Position
$791.91M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
75
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Ra Capital Management, L.P. | 6.88% | 28,933,371 | $791,906,364 | $1,207,389,572 | +$415,483,208 | +52.47% | |
| Fmr Llc | 0.01% | 10,292,735 | $281,712,158 | $429,515,832 | +$147,803,674 | +52.47% | |
| Arch Venture Management, Llc | 15.95% | 6,412,780 | $175,517,789 | $267,605,309 | +$92,087,520 | +52.47% | |
| Venbio Partners Llc | 27.75% | 5,266,697 | $144,149,497 | $219,779,266 | +$75,629,769 | +52.47% | |
| Alphabet Inc. | 0.14% | 4,919,498 | $134,646,660 | $205,290,652 | +$70,643,992 | +52.47% | |
| Nextech Invest, Ltd. | 6.06% | 4,663,176 | $127,631,127 | $194,594,334 | +$66,963,207 | +52.47% | |
| Cormorant Asset Management, Lp | 6.47% | 4,615,612 | $126,329,300 | $192,609,489 | +$66,280,189 | +52.47% | |
| Regeneron Pharmaceuticals, Inc. | 64.35% | 4,166,666 | $114,041,648 | $173,874,972 | +$59,833,324 | +52.47% | |
| Siren, L.L.C. | 1.66% | 2,992,259 | $81,898,129 | $124,866,968 | +$42,968,839 | +52.47% | |
| Frazier Life Sciences Management, L.P. | 1.14% | 1,920,805 | $52,572,433 | $80,155,193 | +$27,582,760 | +52.47% | |
| Deerfield Management Company, L.P. | 0.54% | 1,880,704 | $51,474,868 | $78,481,778 | +$27,006,910 | +52.47% | |
| General Catalyst Group Management, Llc | 23.24% | 1,600,937 | $43,817,646 | $66,807,101 | +$22,989,455 | +52.47% | |
| General Atlantic, L.P. | 1.45% | 1,538,461 | $42,107,678 | $64,199,978 | +$22,092,300 | +52.47% | |
| Soleus Capital Management, L.P. | 1.38% | 1,465,070 | $40,098,966 | $61,137,371 | +$21,038,405 | +52.47% | |
| Vanguard Portfolio Management Llc | 0.00% | 1,302,479 | $35,648,850 | $54,352,449 | +$18,703,599 | +52.47% | |
| Vanguard Capital Management Llc | 0.00% | 1,156,962 | $31,666,050 | $48,280,024 | +$16,613,974 | +52.47% | |
| Jpmorgan Chase & Co | 0.00% | 1,042,772 | $30,438,515 | $43,514,876 | +$13,076,361 | +42.96% | |
| Foresite Capital Management Vi Llc | 4.26% | 999,044 | $27,343,834 | $41,690,106 | +$14,346,272 | +52.47% | |
| Alliancebernstein L.P. | 0.01% | 810,279 | $22,177,336 | $33,812,943 | +$11,635,607 | +52.47% | |
| Price T Rowe Associates Inc | 0.00% | 751,947 | $20,581,000 | $31,378,748 | +$10,797,748 | +52.46% | |
| Casdin Capital, Llc | 0.88% | 645,690 | $17,672,535 | $26,944,644 | +$9,272,109 | +52.47% | |
| Venrock Adviser, Llc | 0.52% | 625,000 | $17,106,250 | $26,081,250 | +$8,975,000 | +52.47% | |
| Rock Springs Capital Management Lp | 0.77% | 578,028 | $15,820,626 | $24,121,108 | +$8,300,482 | +52.47% | |
| Samsara Biocapital, Llc | 1.25% | 556,044 | $15,218,924 | $23,203,716 | +$7,984,792 | +52.47% | |
| Logos Global Management Lp | 0.62% | 525,000 | $14,369,250 | $21,908,250 | +$7,539,000 | +52.47% | |
| Baker Bros. Advisors Lp | 0.07% | 500,000 | $13,685,000 | $20,865,000 | +$7,180,000 | +52.47% | |
| Bellevue Group Ag | 0.29% | 500,000 | $13,685,000 | $20,865,000 | +$7,180,000 | +52.47% | |
| Marshall Wace, Llp | 0.01% | 445,359 | $12,189,476 | $18,584,831 | +$6,395,355 | +52.47% | |
| Iconiq Capital, Llc | 0.28% | 350,000 | $9,579,500 | $14,605,500 | +$5,026,000 | +52.47% | |
| Massachusetts Financial Services Co | 0.00% | 295,962 | $8,100,480 | $12,350,494 | +$4,250,014 | +52.47% | |
| Kynam Capital Management, Lp | 0.38% | 250,000 | $6,842,500 | $10,432,500 | +$3,590,000 | +52.47% | |
| Federated Hermes, Inc. | 0.01% | 246,200 | $6,738,494 | $10,273,926 | +$3,535,432 | +52.47% | |
| Ameriprise Financial Inc | 0.00% | 174,773 | $4,783,536 | $7,293,277 | +$2,509,741 | +52.47% | |
| Driehaus Capital Management Llc | 0.02% | 100,000 | $2,737,000 | $4,173,000 | +$1,436,000 | +52.47% | |
| Geode Capital Management, Llc | 0.00% | 99,358 | $2,719,428 | $4,146,209 | +$1,426,781 | +52.47% | |
| Td Asset Management Inc | 0.00% | 76,982 | $2,106,997 | $3,212,459 | +$1,105,462 | +52.47% | |
| Squarepoint Ops Llc | 0.00% | 48,484 | $1,327,007 | $2,023,237 | +$696,230 | +52.47% | |
| Tudor Investment Corp Et Al | 0.00% | 44,045 | $1,205,512 | $1,837,998 | +$632,486 | +52.47% | |
| Ubs Group Ag | 0.00% | 38,698 | $1,059,164 | $1,614,868 | +$555,704 | +52.47% | |
| Winton Group Ltd | 0.03% | 34,900 | $955,213 | $1,456,377 | +$501,164 | +52.47% | |
| Vanguard Fiduciary Trust Co | 0.00% | 27,800 | $760,886 | $1,160,094 | +$399,208 | +52.47% | |
| Balyasny Asset Management L.P. | 0.00% | 24,264 | $664,106 | $1,012,537 | +$348,431 | +52.47% | |
| Hudson Bay Capital Management Lp | 0.00% | 22,690 | $621,025 | $946,854 | +$325,829 | +52.47% | |
| Brevan Howard Capital Management Lp | 0.01% | 22,565 | $617,604 | $941,637 | +$324,033 | +52.47% | |
| Ghisallo Capital Management Llc | 0.01% | 20,000 | $547,400 | $834,600 | +$287,200 | +52.47% | |
| Mitsubishi Ufj Asset Management Co., Ltd. | 0.00% | 19,200 | $525,504 | $801,216 | +$275,712 | +52.47% | |
| Vanguard Personalized Indexing Management, Llc | 0.00% | 11,729 | $321,023 | $489,451 | +$168,428 | +52.47% | |
| Alyeska Investment Group, L.P. | 0.00% | 10,000 | $273,700 | $417,300 | +$143,600 | +52.47% | |
| Burkehill Global Management, Lp | 0.01% | 10,000 | $273,700 | $417,300 | +$143,600 | +52.47% | |
| Seven Grand Managers, Llc | 0.01% | 10,000 | $273,700 | $417,300 | +$143,600 | +52.47% |
Frequently asked questions about PBLS
Who owns the most PBLS stock?
The largest holders of PBLS 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 Parabilis Medicines, Inc. (PBLS).
Is PBLS widely held by superinvestors?
Many widely followed stocks like PBLS appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly PBLS 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.