SNDX Institutional Ownership & Shareholders
SYNDAX PHARMACEUTICALS INC (SNDX) is currently held by 234 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $2.31B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of SNDX tracked by InsiderSet, reporting ownership valued at approximately $197.18M 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 $123.12M, representing an estimated loss of -37.56% 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
234
Total Reported Value
$2.31B
Largest Holder
Blackrock, Inc.
Largest Position
$197.18M
Insider Transactions (90d)
1
Latest Filing Quarter
Q2 2026
New Institutional Positions
52
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% | 9,020,006 | $197,177,353 | $123,123,082 | -$74,054,271 | -37.56% | |
| Kynam Capital Management, Lp | 9.73% | 8,050,959 | $175,993,964 | $109,895,590 | -$66,098,374 | -37.56% | |
| Goldman Sachs Group Inc | 0.01% | 5,861,265 | $128,127,253 | $80,006,267 | -$48,120,986 | -37.56% | |
| State Street Corp | 0.00% | 5,658,424 | $123,693,149 | $77,237,488 | -$46,455,661 | -37.56% | |
| Bank Of America Corp | 0.01% | 4,045,094 | $88,425,755 | $55,215,533 | -$33,210,222 | -37.56% | |
| Vanguard Capital Management Llc | 0.00% | 3,927,892 | $85,863,719 | $53,615,726 | -$32,247,993 | -37.56% | |
| Deerfield Management Company, L.P. | 0.86% | 3,779,900 | $82,628,614 | $51,595,635 | -$31,032,979 | -37.56% | |
| Eversept Partners, Lp | 3.33% | 2,798,210 | $61,168,871 | $38,195,567 | -$22,973,305 | -37.56% | |
| Geode Capital Management, Llc | 0.00% | 2,584,136 | $56,499,563 | $35,273,456 | -$21,226,107 | -37.57% | |
| Hood River Capital Management Llc | 0.41% | 2,564,279 | $56,055,139 | $35,002,408 | -$21,052,731 | -37.56% | |
| Kingdon Capital Management, L.L.C. | 7.37% | 2,500,000 | $54,650,000 | $34,125,000 | -$20,525,000 | -37.56% | |
| Millennium Management Llc | 0.03% | 2,053,960 | $44,899,566 | $28,036,554 | -$16,863,012 | -37.56% | |
| Vanguard Portfolio Management Llc | 0.00% | 1,921,796 | $42,010,461 | $26,232,515 | -$15,777,946 | -37.56% | |
| Ubs Group Ag | 0.01% | 1,893,750 | $41,397,375 | $25,849,688 | -$15,547,688 | -37.56% | |
| Elmind Capital, Lp | 10.19% | 1,855,000 | $40,550,300 | $25,320,750 | -$15,229,550 | -37.56% | |
| Bnp Paribas Asset Management Holding S.A. | 0.04% | 1,790,173 | $39,133,182 | $24,435,861 | -$14,697,321 | -37.56% | |
| Candriam S.C.A. | 0.17% | 1,696,040 | $37,039,763 | $23,150,946 | -$13,888,817 | -37.50% | |
| Soleus Capital Management, L.P. | 1.23% | 1,628,039 | $35,588,933 | $22,222,732 | -$13,366,201 | -37.56% | |
| Two Sigma Investments, Lp | 0.03% | 1,578,125 | $34,497,812 | $21,541,406 | -$12,956,406 | -37.56% | |
| Orbimed Advisors Llc | 0.64% | 1,542,000 | $33,708,120 | $21,048,300 | -$12,659,820 | -37.56% | |
| Nuveen, Llc | 0.01% | 1,364,575 | $29,829,610 | $18,626,449 | -$11,203,161 | -37.56% | |
| Mpm Bioimpact Llc | 1.78% | 1,333,523 | $29,150,813 | $18,202,589 | -$10,948,224 | -37.56% | |
| Aisling Capital Management Lp | 6.10% | 1,316,806 | $28,785,379 | $17,974,402 | -$10,810,977 | -37.56% | |
| Woodline Partners Lp | 0.08% | 1,250,760 | $27,341,614 | $17,072,874 | -$10,268,740 | -37.56% | |
| D. E. Shaw & Co., Inc. | 0.02% | 1,239,954 | $27,105,395 | $16,925,372 | -$10,180,023 | -37.56% | |
| Silverarc Capital Management, Llc | 2.95% | 1,214,390 | $26,546,565 | $16,576,424 | -$9,970,142 | -37.56% | |
| Prosight Management, Lp | 4.52% | 1,200,000 | $26,232,000 | $16,380,000 | -$9,852,000 | -37.56% | |
| Catalio Capital Management, Lp | 4.44% | 1,196,807 | $25,144,915 | $16,336,416 | -$8,808,499 | -35.03% | |
| Trails Edge Capital Partners, Lp | 3.85% | 1,110,000 | $24,264,600 | $15,151,500 | -$9,113,100 | -37.56% | |
| Ensign Peak Advisors, Inc | 0.04% | 990,969 | $23,149,036 | $13,526,727 | -$9,622,309 | -41.57% | |
| Algert Global Llc | 0.27% | 1,051,465 | $22,985,025 | $14,352,497 | -$8,632,528 | -37.56% | |
| Bank Of New York Mellon Corp | 0.00% | 1,040,079 | $22,736,118 | $14,197,078 | -$8,539,040 | -37.56% | |
| Sphera Funds Management Ltd. | 3.17% | 1,014,606 | $22,179,287 | $13,849,372 | -$8,329,915 | -37.56% | |
| Loomis Sayles & Co L P | 0.03% | 923,624 | $20,190,420 | $12,607,468 | -$7,582,952 | -37.56% | |
| Parkman Healthcare Partners Llc | 1.97% | 877,256 | $19,176,816 | $11,974,544 | -$7,202,272 | -37.56% | |
| Palo Alto Investors Lp | 2.61% | 864,986 | $18,908,594 | $11,807,059 | -$7,101,535 | -37.56% | |
| Aqr Capital Management Llc | 0.01% | 853,304 | $18,653,226 | $11,647,600 | -$7,005,626 | -37.56% | |
| Northern Trust Corp | 0.00% | 845,537 | $18,483,439 | $11,541,580 | -$6,941,859 | -37.56% | |
| Charles Schwab Investment Management Inc | 0.00% | 814,303 | $17,800,664 | $11,115,236 | -$6,685,428 | -37.56% | |
| Vanguard Fiduciary Trust Co | 0.00% | 633,509 | $13,848,507 | $8,647,398 | -$5,201,109 | -37.56% | |
| Morgan Stanley | 0.00% | 588,979 | $12,875,080 | $8,039,563 | -$4,835,517 | -37.56% | |
| Rhenman & Partners Asset Management Ab | 1.16% | 560,250 | $12,247,065 | $7,647,413 | -$4,599,653 | -37.56% | |
| Apis Capital Advisors, Llc | 1.18% | 556,000 | $12,154,160 | $7,589,400 | -$4,564,760 | -37.56% | |
| Panagora Asset Management Inc | 0.04% | 546,517 | $11,946,862 | $7,459,957 | -$4,486,905 | -37.56% | |
| Qube Research & Technologies Ltd | 0.01% | 477,182 | $10,431,199 | $6,513,534 | -$3,917,665 | -37.56% | |
| First Trust Advisors Lp | 0.01% | 456,700 | $9,983,462 | $6,233,955 | -$3,749,507 | -37.56% | |
| Susquehanna International Group, Llp | 0.01% | 454,101 | $9,926,648 | $6,198,479 | -$3,728,169 | -37.56% | |
| Granahan Investment Management, Llc | 0.35% | 446,988 | $9,771,158 | $6,101,386 | -$3,669,772 | -37.56% | |
| Knott David M Jr | 5.05% | 437,245 | $9,558,176 | $5,968,394 | -$3,589,782 | -37.56% | |
| Jump Financial, Llc | 0.08% | 402,846 | $8,806,214 | $5,498,848 | -$3,307,366 | -37.56% |
Frequently asked questions about SNDX
Who are the largest institutional holders of SNDX?
The largest institutional holders of SNDX reported in the latest SEC Form 13F filings include Blackrock, Inc., Kynam Capital Management, Lp, Goldman Sachs Group Inc, State Street Corp, and Bank Of America Corp. InsiderSet ranks institutional holders by their latest reported SNDX position.
What is SNDX institutional ownership?
This page tracks SNDX positions reported by institutional investment managers through SEC Form 13F. SYNDAX PHARMACEUTICALS INC (SNDX) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own SNDX?
InsiderSet currently tracks 234 institutional managers reporting SNDX holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of SNDX shareholders.
How much SNDX stock do institutions own?
Institutional investment managers disclosed approximately $2.31B in SNDX holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was SNDX institutional ownership last updated?
The latest SNDX institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional SNDX holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its SNDX position after the reporting date.
Are institutions buying or selling SNDX?
Institutional buying and selling can be analyzed by comparing SNDX positions across consecutive 13F reporting periods. InsiderSet's SNDX Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View SNDX ownership changes.
How has SNDX institutional ownership changed over time?
InsiderSet tracks SNDX institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.