PERSONALIS INC (PSNL) Institutional Shareholders
PERSONALIS INC (PSNL) 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 $1.14B in PSNL holdings during the latest filing period.
Merck & Co., Inc. is currently the largest disclosed institutional shareholder of PSNL tracked by InsiderSet, reporting ownership valued at approximately $188.20M 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 $230.34M, representing an estimated gain of +22.39% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 67% of the total disclosed PSNL value among the investors covered in this analysis. Major shareholders include Merck & Co., Inc., ARK Invest, Blackrock, Inc., and several other long-term asset managers with concentrated positions in PERSONALIS INC (PSNL).
This page ranks the largest institutional PSNL 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
156
Total Reported Value
$1.14B
Largest Holder
Merck & Co., Inc.
Largest Position
$188.20M
Insider Transactions (90d)
7
Latest Filing Quarter
Q2 2026
New Institutional Positions
114
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Merck & Co., Inc. | 35.75% | 14,044,943 | $188,202,236 | $230,337,065 | +$42,134,829 | +22.39% | |
| ARK Invest | Cathie Wood | 0.72% | 8,271,339 | $110,835,941 | $135,649,960 | +$24,814,019 | +22.39% |
| Blackrock, Inc. | 0.00% | 7,082,491 | $94,905,378 | $116,152,852 | +$21,247,474 | +22.39% | |
| Lightspeed Management Company, L.L.C. | 3.40% | 6,101,850 | $81,764,790 | $100,070,340 | +$18,305,550 | +22.39% | |
| Ameriprise Financial Inc | 0.02% | 6,086,315 | $81,556,656 | $99,815,566 | +$18,258,910 | +22.39% | |
| Deep Track Capital, Lp | 0.79% | 4,000,000 | $53,600,000 | $65,600,000 | +$12,000,000 | +22.39% | |
| Aberdeen Group Plc | 0.07% | 3,747,290 | $50,213,686 | $61,455,556 | +$11,241,870 | +22.39% | |
| Vanguard Capital Management Llc | 0.00% | 3,010,150 | $40,336,010 | $49,366,460 | +$9,030,450 | +22.39% | |
| Casdin Capital, Llc | 1.71% | 2,550,000 | $34,170,000 | $41,820,000 | +$7,650,000 | +22.39% | |
| Kennedy Capital Management Llc | 0.56% | 2,364,282 | $31,681,379 | $38,774,225 | +$7,092,846 | +22.39% | |
| Geode Capital Management, Llc | 0.00% | 1,822,445 | $24,425,481 | $29,888,098 | +$5,462,617 | +22.36% | |
| Bank Of America Corp | 0.00% | 1,820,541 | $24,395,249 | $29,856,872 | +$5,461,623 | +22.39% | |
| Aigh Capital Management Llc | 2.08% | 1,715,000 | $22,981,000 | $28,126,000 | +$5,145,000 | +22.39% | |
| Blue Water Life Science Advisors, Lp | 14.15% | 1,676,300 | $22,462,420 | $27,491,320 | +$5,028,900 | +22.39% | |
| Dimensional Fund Advisors Lp | 0.00% | 1,496,983 | $20,062,963 | $24,550,521 | +$4,487,558 | +22.37% | |
| State Street Corp | 0.00% | 1,487,077 | $19,926,832 | $24,388,063 | +$4,461,231 | +22.39% | |
| Morgan Stanley | 0.00% | 1,270,946 | $17,030,682 | $20,843,514 | +$3,812,832 | +22.39% | |
| Goldman Sachs Group Inc | 0.00% | 931,031 | $12,475,815 | $15,268,908 | +$2,793,093 | +22.39% | |
| Hrt Financial Lp | 0.02% | 930,816 | $12,472,000 | $15,265,382 | +$2,793,382 | +22.40% | |
| Nuveen, Llc | 0.00% | 753,004 | $10,090,253 | $12,349,266 | +$2,259,013 | +22.39% | |
| Jane Street Group, Llc | 0.01% | 738,241 | $9,892,429 | $12,107,152 | +$2,214,723 | +22.39% | |
| Vanguard Portfolio Management Llc | 0.00% | 659,834 | $8,841,776 | $10,821,278 | +$1,979,502 | +22.39% | |
| Northern Trust Corp | 0.00% | 632,803 | $8,479,560 | $10,377,969 | +$1,898,409 | +22.39% | |
| Trexquant Investment Lp | 0.05% | 600,216 | $8,042,894 | $9,843,542 | +$1,800,648 | +22.39% | |
| Howland Capital Management Llc | 0.27% | 555,641 | $7,445,590 | $9,112,512 | +$1,666,922 | +22.39% | |
| State Of Michigan Retirement System | 0.03% | 493,798 | $6,616,893 | $8,098,287 | +$1,481,394 | +22.39% | |
| Vanguard Fiduciary Trust Co | 0.00% | 453,257 | $6,073,644 | $7,433,415 | +$1,359,771 | +22.39% | |
| Millennium Management Llc | 0.00% | 450,160 | $6,032,144 | $7,382,624 | +$1,350,480 | +22.39% | |
| Sumitomo Mitsui Trust Group, Inc. | 0.00% | 417,488 | $5,594,339 | $6,846,803 | +$1,252,464 | +22.39% | |
| Amova Asset Management Americas, Inc. | 0.07% | 417,488 | $5,590,164 | $6,846,803 | +$1,256,639 | +22.48% | |
| Bnp Paribas Financial Markets | 0.00% | 364,764 | $4,887,838 | $5,982,130 | +$1,094,292 | +22.39% | |
| Iq Eq Fund Management (Ireland) Ltd | 0.30% | 351,741 | $4,713,329 | $5,768,552 | +$1,055,223 | +22.39% | |
| Wellington Shields Capital Management, Llc | 0.58% | 339,733 | $4,552,427 | $5,571,621 | +$1,019,194 | +22.39% | |
| Wellington Shields & Co., Llc | 0.88% | 292,489 | $3,919,353 | $4,796,820 | +$877,467 | +22.39% | |
| Militia Capital Management Llc | 0.71% | 291,881 | $3,911,205 | $4,786,848 | +$875,643 | +22.39% | |
| Gilder Gagnon Howe & Co Llc | 0.04% | 278,490 | $3,731,766 | $4,567,236 | +$835,470 | +22.39% | |
| Tudor Investment Corp Et Al | 0.02% | 274,321 | $3,675,901 | $4,498,864 | +$822,963 | +22.39% | |
| Stempoint Capital Lp | 0.57% | 247,783 | $3,320,292 | $4,063,641 | +$743,349 | +22.39% | |
| Perkins Capital Management Inc | 2.41% | 239,000 | $3,202,600 | $3,919,600 | +$717,000 | +22.39% | |
| Bruce & Co., Inc. | 0.84% | 233,000 | $3,122,200 | $3,821,200 | +$699,000 | +22.39% | |
| First Manhattan Co. Llc. | 0.01% | 230,600 | $3,090,040 | $3,781,840 | +$691,800 | +22.39% | |
| Udine Wealth Management, Inc. | 1.19% | 50,030 | $2,898,238 | $820,492 | -$2,077,746 | -71.69% | |
| Charles Schwab Investment Management Inc | 0.00% | 209,320 | $2,804,888 | $3,432,848 | +$627,960 | +22.39% | |
| Bank Of New York Mellon Corp | 0.00% | 189,065 | $2,533,469 | $3,100,666 | +$567,197 | +22.39% | |
| Fred Alger Management, Llc | 0.01% | 165,579 | $2,218,759 | $2,715,496 | +$496,737 | +22.39% | |
| Ubs Group Ag | 0.00% | 164,761 | $2,207,797 | $2,702,080 | +$494,283 | +22.39% | |
| Price T Rowe Associates Inc | 0.00% | 158,838 | $2,130,000 | $2,604,943 | +$474,943 | +22.30% | |
| Nano Cap New Millennium Growth Fund L P | 1.62% | 157,500 | $2,110,500 | $2,583,000 | +$472,500 | +22.39% | |
| Citadel Advisors Llc | 0.00% | 144,998 | $1,942,973 | $2,377,967 | +$434,994 | +22.39% | |
| Swiss National Bank | 0.00% | 136,500 | $1,829,100 | $2,238,600 | +$409,500 | +22.39% |
Frequently asked questions about PSNL
Who owns the most PSNL stock?
The largest holders of PSNL 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 PERSONALIS INC (PSNL).
Is PSNL widely held by superinvestors?
Many widely followed stocks like PSNL appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly PSNL 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.