SYNDAX PHARMACEUTICALS INC (SNDX) Institutional Shareholders
SYNDAX PHARMACEUTICALS INC (SNDX) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $2.30B in SNDX holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of SNDX tracked by InsiderSet, reporting ownership valued at approximately $192.82M 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 $158.82M, representing an estimated loss of -17.64% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 46% of the total disclosed SNDX value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Kynam Capital Management, Lp, Goldman Sachs Group Inc, and several other long-term asset managers with concentrated positions in SYNDAX PHARMACEUTICALS INC (SNDX).
This page ranks the largest institutional SNDX 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
240
Total Reported Value
$2.30B
Largest Holder
Blackrock, Inc.
Largest Position
$192.82M
Insider Transactions (90d)
6
Latest Filing Quarter
Q2 2026
New Institutional Positions
109
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 8,254,426 | $192,823,390 | $158,815,156 | -$34,008,234 | -17.64% | |
| Kynam Capital Management, Lp | 11.94% | 8,050,959 | $188,070,402 | $154,900,451 | -$33,169,951 | -17.64% | |
| Goldman Sachs Group Inc | 0.02% | 4,996,787 | $116,724,944 | $96,138,182 | -$20,586,762 | -17.64% | |
| State Street Corp | 0.00% | 4,430,076 | $103,486,575 | $85,234,662 | -$18,251,913 | -17.64% | |
| Bank Of America Corp | 0.01% | 4,249,836 | $99,276,168 | $81,766,845 | -$17,509,323 | -17.64% | |
| Vanguard Capital Management Llc | 0.00% | 3,822,579 | $89,295,445 | $73,546,420 | -$15,749,025 | -17.64% | |
| Deerfield Management Company, L.P. | 1.04% | 3,779,900 | $88,298,464 | $72,725,276 | -$15,573,188 | -17.64% | |
| Eversept Partners, Lp | 4.44% | 2,885,622 | $67,408,130 | $55,519,367 | -$11,888,763 | -17.64% | |
| Kingdon Capital Management, L.L.C. | 9.78% | 2,500,000 | $58,400,000 | $48,100,000 | -$10,300,000 | -17.64% | |
| Hood River Capital Management Llc | 0.55% | 2,354,285 | $54,996,098 | $45,296,443 | -$9,699,655 | -17.64% | |
| Geode Capital Management, Llc | 0.00% | 2,157,058 | $50,399,089 | $41,501,796 | -$8,897,293 | -17.65% | |
| Franklin Resources Inc | 0.01% | 2,150,079 | $50,225,842 | $41,367,520 | -$8,858,322 | -17.64% | |
| Point72 Asset Management, L.P. | 0.08% | 1,985,547 | $46,382,378 | $38,201,924 | -$8,180,454 | -17.64% | |
| Elmind Capital, Lp | 12.30% | 1,855,000 | $43,332,800 | $35,690,200 | -$7,642,600 | -17.64% | |
| Vanguard Portfolio Management Llc | 0.00% | 1,737,141 | $40,579,614 | $33,422,593 | -$7,157,021 | -17.64% | |
| Bnp Paribas Asset Management Holding S.A. | 0.05% | 1,732,541 | $40,472,158 | $33,334,089 | -$7,138,069 | -17.64% | |
| Soleus Capital Management, L.P. | 1.63% | 1,726,908 | $40,340,571 | $33,225,710 | -$7,114,861 | -17.64% | |
| D. E. Shaw & Co., Inc. | 0.03% | 1,601,896 | $37,420,290 | $30,820,479 | -$6,599,811 | -17.64% | |
| Two Sigma Investments, Lp | 0.03% | 1,579,596 | $36,899,363 | $30,391,427 | -$6,507,936 | -17.64% | |
| Nuveen, Llc | 0.01% | 1,494,645 | $34,914,908 | $28,756,970 | -$6,157,938 | -17.64% | |
| Mpm Bioimpact Llc | 2.42% | 1,340,733 | $31,319,523 | $25,795,703 | -$5,523,820 | -17.64% | |
| Aisling Capital Management Lp | 6.46% | 1,316,806 | $30,760,588 | $25,335,347 | -$5,425,241 | -17.64% | |
| Woodline Partners Lp | 0.11% | 1,250,760 | $29,217,754 | $24,064,622 | -$5,153,132 | -17.64% | |
| Stempoint Capital Lp | 5.54% | 1,215,743 | $28,399,756 | $23,390,895 | -$5,008,861 | -17.64% | |
| Ubs Group Ag | 0.00% | 1,153,662 | $26,949,545 | $22,196,457 | -$4,753,088 | -17.64% | |
| Catalio Capital Management, Lp | 5.09% | 1,043,670 | $24,380,131 | $20,080,211 | -$4,299,920 | -17.64% | |
| Bank Of New York Mellon Corp | 0.00% | 1,004,498 | $23,465,086 | $19,326,542 | -$4,138,544 | -17.64% | |
| Ensign Peak Advisors, Inc | 0.04% | 990,969 | $23,149,036 | $19,066,244 | -$4,082,792 | -17.64% | |
| Aqr Capital Management Llc | 0.01% | 980,314 | $22,900,136 | $18,861,241 | -$4,038,895 | -17.64% | |
| Orbimed Advisors Llc | 0.49% | 962,300 | $22,479,328 | $18,514,652 | -$3,964,676 | -17.64% | |
| Candriam S.C.A. | 0.11% | 925,332 | $21,615,756 | $17,803,388 | -$3,812,368 | -17.64% | |
| Parkman Healthcare Partners Llc | 2.18% | 901,511 | $21,059,297 | $17,345,072 | -$3,714,225 | -17.64% | |
| Morgan Stanley | 0.00% | 893,933 | $20,882,275 | $17,199,271 | -$3,683,004 | -17.64% | |
| Silverarc Capital Management, Llc | 2.45% | 888,987 | $20,766,736 | $17,104,110 | -$3,662,626 | -17.64% | |
| Palo Alto Investors Lp | 3.09% | 864,986 | $20,206,073 | $16,642,331 | -$3,563,742 | -17.64% | |
| Prosight Management, Lp | 2.95% | 770,000 | $17,987,200 | $14,814,800 | -$3,172,400 | -17.64% | |
| Northern Trust Corp | 0.00% | 755,719 | $17,653,596 | $14,540,034 | -$3,113,562 | -17.64% | |
| Sphera Funds Management Ltd. | 2.91% | 724,563 | $16,925,792 | $13,940,592 | -$2,985,200 | -17.64% | |
| Charles Schwab Investment Management Inc | 0.00% | 715,153 | $16,705,974 | $13,759,544 | -$2,946,430 | -17.64% | |
| Trails Edge Capital Partners, Lp | 3.86% | 701,821 | $16,394,539 | $13,503,036 | -$2,891,503 | -17.64% | |
| Citadel Advisors Llc | 0.01% | 630,942 | $14,738,805 | $12,139,324 | -$2,599,481 | -17.64% | |
| Vanguard Fiduciary Trust Co | 0.00% | 600,517 | $14,028,077 | $11,553,947 | -$2,474,130 | -17.64% | |
| Apis Capital Advisors, Llc | 1.98% | 550,000 | $12,848,000 | $10,582,000 | -$2,266,000 | -17.64% | |
| Renaissance Technologies LLC | Jim Simons | 0.02% | 498,200 | $11,637,952 | $9,585,368 | -$2,052,584 | -17.64% |
| Knott David M Jr | 5.87% | 422,000 | $9,857,920 | $8,119,280 | -$1,738,640 | -17.64% | |
| Walleye Capital Llc | 0.06% | 384,973 | $8,992,969 | $7,406,881 | -$1,586,088 | -17.64% | |
| Rhenman & Partners Asset Management Ab | 1.09% | 379,250 | $8,859,280 | $7,296,770 | -$1,562,510 | -17.64% | |
| Integral Health Asset Management, Llc | 0.43% | 350,000 | $8,176,000 | $6,734,000 | -$1,442,000 | -17.64% | |
| Aberdeen Group Plc | 0.01% | 372,766 | $8,148,665 | $7,172,018 | -$976,647 | -11.99% | |
| Jane Street Group, Llc | 0.01% | 335,531 | $7,838,005 | $6,455,616 | -$1,382,389 | -17.64% |
Frequently asked questions about SNDX
Who owns the most SNDX stock?
The largest holders of SNDX 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 SYNDAX PHARMACEUTICALS INC (SNDX).
Is SNDX widely held by superinvestors?
Many widely followed stocks like SNDX appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly SNDX 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.