SNDX · Syndax Pharmaceuticals Inc
Market Cap
$1.74B
Shares
89.30M
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Holders: 243
Total Value: $2,375,888,459
Total Shares: 108,686,608
Showing 1–100
of 252 holdings by value
· page 1 of 3
Institutional Ownership Trend
26 quarters
Holder Concentration
Across 243 13F filers · Δ vs Mar 31, 2026Top Holder
8.3%
+0.0 pts
Top 5
30.0%
+0.1 pts
Top 10
44.4%
−0.9 pts
HHI
295
Broadly held−7
Quarterly Activity
vs Mar 31, 2026
New
37
Increased
96
Decreased
77
Sold Out
42
Unchanged
33
Holder count:
-5
Institutional value:
+1.7%
Shares held:
+8.5%
Top Buyers
vs Mar 31, 2026| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Mega MILLENNIUM MANAGEMENT LLC | +1,854,436 | 2,053,960 | |
| Mega STATE STREET CORP | +1,228,348 | 5,658,424 | |
| Mega GOLDMAN SACHS GROUP INC | +864,478 | 5,861,265 | |
| Large Candriam S.C.A. | +770,708 | 1,696,040 | |
| Mega BlackRock, Inc. | +765,580 | 9,020,006 |
Top Sellers
vs Mar 31, 2026| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Mega CITADEL ADVISORS LLC | −422,664 | 344,878 | |
| Large Walleye Capital LLC | −389,537 | 12,536 | |
| Mega JANE STREET GROUP, LLC | −365,331 | 19,700 | |
| Mega D. E. Shaw & Co., Inc. | −361,942 | 1,239,954 | |
| Mega MORGAN STANLEY | −304,954 | 588,979 |
Top New Positions
vs Mar 31, 2026| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Large LOOMIS SAYLES & CO L P | 923,624 | $20,190,420 | |
| Mega FIRST TRUST ADVISORS LP | 456,700 | $9,983,462 | |
| Mid Jump Financial, LLC | 402,846 | $8,806,213 | |
| Large JUPITER ASSET MANAGEMENT LTD | 366,568 | $8,013,176 | |
| Small Jones Hill Capital LP | 340,000 | $7,432,400 |
Top Sold-Out Positions
vs Mar 31, 2026| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Large Point72 Asset Management, L.P. | 1,985,547 | $46,382,377 | |
| Small STEMPOINT CAPITAL LP | 1,365,743 | $28,489,756 | |
| Mid Integral Health Asset Management, LLC | 350,000 | $8,176,000 | |
| Mega CANADA PENSION PLAN INVESTMENT BOARD | 229,600 | $5,363,456 | |
| Small ESSEX INVESTMENT MANAGEMENT CO LLC | 198,985 | $4,648,289 |
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega BlackRock, Inc. | $197,177,323 | 8.30% | 9,020,006 | Shares | 2026-08-07 | |
| Mid Kynam Capital Management, LP | $175,993,963 | 7.41% | 8,050,959 | Shares | 2026-08-14 | |
| Mega GOLDMAN SACHS GROUP INC | $128,127,252 | 5.39% | 5,861,265 | Shares | 2026-08-14 | |
| Mega STATE STREET CORP | $123,693,148 | 5.21% | 5,658,424 | Shares | 2026-08-07 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $88,425,753 | 3.72% | 4,045,094 | Shares | 2026-08-14 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $85,863,719 | 3.61% | 3,927,892 | Shares | 2026-08-13 | |
| Mid DEERFIELD MANAGEMENT COMPANY, L.P. | $82,628,614 | 3.48% | 3,779,900 | Shares | 2026-08-14 | |
| Mid Eversept Partners, LP | $61,168,870 | 2.57% | 2,798,210 | Shares | 2026-08-14 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC | $56,489,212 | 2.38% | 2,584,136 | Shares | 2026-08-12 | |
| Large Hood River Capital Management LLC | $56,055,138 | 2.36% | 2,564,279 | Shares | 2026-08-14 | |
| Small KINGDON CAPITAL MANAGEMENT, L.L.C. | $54,650,000 | 2.30% | 2,500,000 | Shares | 2026-08-14 | |
| Mega FRANKLIN RESOURCES INC | $49,982,867 | 2.10% | 2,286,499 | Shares | 2026-08-13 | |
| Mega MILLENNIUM MANAGEMENT LLC | $44,899,565 | 1.89% | 2,053,960 | Shares | 2026-08-14 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC | $42,010,460 | 1.77% | 1,921,796 | Shares | 2026-08-13 | |
| Mega UBS Group AG | $41,397,374 | 1.74% | 1,893,750 | Shares | 2026-08-13 | |
| Small Elmind Capital, LP | $40,550,300 | 1.71% | 1,855,000 | Shares | 2026-08-14 | |
| Large BNP PARIBAS ASSET MANAGEMENT Holding S.A. | $39,133,180 | 1.65% | 1,790,173 | Shares | 2026-08-13 | |
| Large Candriam S.C.A. | $37,075,434 | 1.56% | 1,696,040 | Shares | 2026-08-13 | |
| Mid Soleus Capital Management, L.P. | $35,588,932 | 1.50% | 1,628,039 | Shares | 2026-08-11 | |
| Mega TWO SIGMA INVESTMENTS, LP | $34,497,812 | 1.45% | 1,578,125 | Shares | 2026-08-14 | |
| Mid ORBIMED ADVISORS LLC | $33,708,120 | 1.42% | 1,542,000 | Shares | 2026-08-14 | |
| Mega Nuveen, LLC | $29,829,608 | 1.26% | 1,364,575 | Shares | 2026-08-11 | |
| Mid MPM BIOIMPACT LLC | $29,150,812 | 1.23% | 1,333,523 | Shares | 2026-08-14 | |
| Small Aisling Capital Management LP | $28,785,379 | 1.21% | 1,316,806 | Shares | 2026-08-13 | |
| Large Woodline Partners LP | $27,341,613 | 1.15% | 1,250,760 | Shares | 2026-08-14 | |
| Mega D. E. Shaw & Co., Inc. | $27,105,393 | 1.14% | 1,239,954 | Shares | 2026-08-14 | |
| Small Catalio Capital Management, LP | $26,575,158 | 1.12% | 1,215,698 | Shares | 2026-08-14 | |
| Small SILVERARC CAPITAL MANAGEMENT, LLC | $26,546,565 | 1.12% | 1,214,390 | Shares | 2026-08-13 | |
| Small Prosight Management, LP | $26,232,000 | 1.10% | 1,200,000 | Shares | 2026-08-14 | |
| Small Trails Edge Capital Partners, LP | $24,264,600 | 1.02% | 1,110,000 | Shares | 2026-08-14 | |
| Mid ALGERT GLOBAL LLC | $22,985,024 | 0.97% | 1,051,465 | Shares | 2026-08-13 | |
| Mega Bank of New York Mellon Corp Bank | $22,736,122 | 0.96% | 1,040,079 | Shares | 2026-08-06 | |
| Small SPHERA FUNDS MANAGEMENT LTD. | $22,179,287 | 0.93% | 1,014,606 | Shares | 2026-08-14 | |
| Large LOOMIS SAYLES & CO L P | $20,190,420 | 0.85% | 923,624 | Shares | 2026-08-14 | |
| Small Parkman Healthcare Partners LLC | $19,176,816 | 0.81% | 877,256 | Shares | 2026-08-14 | |
| Large Ensign Peak Advisors, Inc | $18,970,785 | 0.80% | 867,831 | Shares | 2026-08-14 | |
| Small Palo Alto Investors LP | $18,908,593 | 0.80% | 864,986 | Shares | 2026-08-19 | |
| Mega AQR CAPITAL MANAGEMENT LLC | $18,653,222 | 0.79% | 853,304 | Shares | 2026-08-14 | |
| Mega NORTHERN TRUST CORP Bank | $18,483,436 | 0.78% | 845,537 | Shares | 2026-08-13 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $17,800,663 | 0.75% | 814,303 | Shares | 2026-08-14 | |
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $13,848,506 | 0.58% | 633,509 | Shares | 2026-08-13 | |
| Mega MORGAN STANLEY | $12,875,078 | 0.54% | 588,979 | Shares | 2026-08-13 | |
| Mid Rhenman & Partners Asset Management AB | $12,247,065 | 0.52% | 560,250 | Shares | 2026-08-13 | |
| Small Apis Capital Advisors, LLC | $12,154,160 | 0.51% | 556,000 | Shares | 2026-08-14 | |
| Large PANAGORA ASSET MANAGEMENT INC | $11,946,861 | 0.50% | 546,517 | Shares | 2026-08-06 | |
| Mega Qube Research & Technologies Ltd | $10,431,198 | 0.44% | 477,182 | Shares | 2026-08-14 | |
| Mega FIRST TRUST ADVISORS LP | $9,983,462 | 0.42% | 456,700 | Shares | 2026-08-11 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $9,926,647 | 0.42% | 454,101 | Shares | 2026-08-14 | |
| Mid Granahan Investment Management, LLC | $9,771,157 | 0.41% | 446,988 | Shares | 2026-08-14 | |
| Small Knott David M Jr | $9,558,175 | 0.40% | 437,245 | Shares | 2026-08-12 | |
| Mid Jump Financial, LLC | $8,806,213 | 0.37% | 402,846 | Shares | 2026-08-13 | |
| Large Aberdeen Group plc | $8,148,664 | 0.34% | 372,766 | Shares | 2026-07-31 | |
| Large Squarepoint Ops LLC | $8,095,129 | 0.34% | 370,317 | Shares | 2026-08-14 | |
| Large JUPITER ASSET MANAGEMENT LTD | $8,013,176 | 0.34% | 366,568 | Shares | 2026-08-10 | |
| Large HRT FINANCIAL LP | $7,938,393 | 0.33% | 363,147 | Shares | 2026-08-14 | |
| Mega AMERIPRISE FINANCIAL INC | $7,582,184 | 0.32% | 346,852 | Shares | 2026-08-14 | |
| Mid Hennion & Walsh Asset Management, Inc. | $7,495,422 | 0.32% | 342,883 | Shares | 2026-07-08 | |
| Small Jones Hill Capital LP | $7,432,400 | 0.31% | 340,000 | Shares | 2026-08-13 | |
| Small DAFNA Capital Management LLC | $7,328,674 | 0.31% | 335,255 | Shares | 2026-08-14 | |
| Mega ENVESTNET ASSET MANAGEMENT INC | $7,161,707 | 0.30% | 327,617 | Shares | 2026-08-03 | |
| Large RENAISSANCE TECHNOLOGIES LLC | $7,030,176 | 0.30% | 321,600 | Shares | 2026-08-13 | |
| Mid Brevan Howard Capital Management LP | $6,756,160 | 0.28% | 309,065 | Shares | 2026-08-14 | |
| Large Alyeska Investment Group, L.P. | $6,743,963 | 0.28% | 308,507 | Shares | 2026-08-14 | |
| Large Verition Fund Management LLC | $6,665,966 | 0.28% | 304,939 | Shares | 2026-08-14 | |
| Large MACKENZIE FINANCIAL CORP | $6,122,526 | 0.26% | 280,079 | Shares | 2026-08-13 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $5,670,484 | 0.24% | 259,400 | Call | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC | $5,645,957 | 0.24% | 258,278 | Shares | 2026-08-14 | |
| Large Trexquant Investment LP | $5,595,045 | 0.24% | 255,949 | Shares | 2026-08-14 | |
| Small SECTOR GAMMA AS | $5,284,414 | 0.22% | 241,739 | Shares | 2026-08-12 | |
| Large Schonfeld Strategic Advisors LLC | $5,174,633 | 0.22% | 236,717 | Shares | 2026-08-14 | |
| Mega JPMORGAN CHASE & CO | $5,059,406 | 0.21% | 231,446 | Shares | 2026-08-12 | |
| Mid Pinnacle Financial Partners, Inc. | $4,747,401 | 0.20% | 217,173 | Shares | 2026-08-14 | |
| Large Man Group plc | $4,671,547 | 0.20% | 213,703 | Shares | 2026-08-14 | |
| Mid Y-Intercept (Hong Kong) Ltd | $4,649,906 | 0.20% | 212,713 | Shares | 2026-07-14 | |
| Mega Pictet Asset Management Holding SA | $4,545,480 | 0.19% | 207,936 | Shares | 2026-07-30 | |
| Large HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Pension | $4,530,485 | 0.19% | 207,250 | Shares | 2026-08-13 | |
| Small Vienna Powszechne Towarzystwo Emerytalne S.A. Vienna Insurance Group Insurance | $4,372,000 | 0.18% | 200,000 | Shares | 2026-07-30 | |
| Mega CITIGROUP INC | $4,278,066 | 0.18% | 195,703 | Shares | 2026-08-03 | |
| Large SEI INVESTMENTS CO | $4,221,908 | 0.18% | 193,134 | Shares | 2026-08-14 | |
| Large NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | $3,934,800 | 0.17% | 180,000 | Shares | 2026-08-14 | |
| Mega Swiss National Bank Bank | $3,674,666 | 0.15% | 168,100 | Shares | 2026-08-11 | |
| Mid Atom Investors LP | $3,552,774 | 0.15% | 162,524 | Shares | 2026-08-14 | |
| Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $3,526,517 | 0.15% | 161,323 | Shares | 2026-08-13 | |
| Mid SummitTX Capital, L.P. | $3,077,822 | 0.13% | 140,797 | Shares | 2026-08-14 | |
| Mega Invesco Ltd. | $3,017,990 | 0.13% | 138,060 | Shares | 2026-08-14 | |
| Mega Russell Investments Group, Ltd. | $2,951,360 | 0.12% | 135,012 | Shares | 2026-08-06 | |
| Small Torray Investment Partners LLC | $2,925,633 | 0.12% | 133,835 | Shares | 2026-07-30 | |
| Mega RHUMBLINE ADVISERS | $2,893,345 | 0.12% | 132,358 | Shares | 2026-08-12 | |
| Mega WELLS FARGO & COMPANY/MN | $2,842,978 | 0.12% | 130,054 | Shares | 2026-08-14 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ | $2,802,430 | 0.12% | 128,199 | Shares | 2026-08-14 | |
| Mid Pale Fire Capital SE | $2,744,523 | 0.12% | 125,550 | Shares | 2026-08-13 | |
| Large CAPITAL FUND MANAGEMENT S.A. | $2,734,489 | 0.12% | 125,091 | Shares | 2026-08-13 | |
| Mega WELLINGTON MANAGEMENT GROUP LLP | $2,715,906 | 0.11% | 124,241 | Shares | 2026-08-14 | |
| Mid PFM Health Sciences, LP | $2,588,704 | 0.11% | 118,422 | Shares | 2026-08-14 | |
| Mega SCHRODER INVESTMENT MANAGEMENT GROUP | $2,518,446 | 0.11% | 115,208 | Shares | 2026-08-13 | |
| Mega ALLIANCEBERNSTEIN L.P. | $2,318,034 | 0.10% | 106,040 | Shares | 2026-08-14 | |
| Large Rafferty Asset Management, LLC | $2,137,623 | 0.09% | 97,787 | Shares | 2026-08-14 | |
| Mega DEUTSCHE BANK AG\ Bank | $2,083,585 | 0.09% | 95,315 | Shares | 2026-08-07 | |
| Mega CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension | $2,043,494 | 0.09% | 93,481 | Shares | 2026-08-24 | |
| Small HUSSMAN STRATEGIC ADVISORS, INC. | $1,836,240 | 0.08% | 84,000 | Shares | 2026-08-03 |
Key facts
CIK
1395937
CUSIP
87164F105
13F (30d)
217 filings
214 filers
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