Syndax Pharmaceuticals Inc
SNDX- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001395937
In the last 90 days, Syndax Pharmaceuticals Inc insiders filed 0 open-market purchases and 1 sale; 242 institutions reported holding it in 13F filings for Q2 2026, worth $2.36B in total; no superinvestor holds it.
13F holders, Q3 2025
Institutional positions in Syndax Pharmaceuticals Inc as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 227
- +12 vs. Q2 2025
- Shares held
- 101.1M
- −592.2K (−0.6%) vs. Q2 2025
- Total value
- $1.56B
- +$603.3M (+63.3%) vs. Q2 2025
- New holders
- 40
- 82 more added
- Sold out
- 28
- 72 more reduced
2 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting SNDX on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 242 | $2.36B |
| Q1 2026 | 247 | $2.32B |
| Q4 2025 | 230 | $2.10B |
| Q3 2025 | 227 | $1.56B |
| Q2 2025 | 217 | $952.6M |
| Q1 2025 | 219 | $1.24B |
| Q4 2024 | 216 | $1.30B |
| Q3 2024 | 210 | $1.71B |
| Q2 2024 | 196 | $1.79B |
| Q1 2024 | 189 | $2.15B |
| Q4 2023 | 177 | $1.92B |
| Q3 2023 | 175 | $1.03B |
| Q2 2023 | 166 | $1.48B |
| Q1 2023 | 163 | $1.54B |
| Q4 2022 | 160 | $1.82B |
| Q3 2022 | 139 | $1.44B |
| Q2 2022 | 121 | $1.06B |
| Q1 2022 | 136 | $948.4M |
| Q4 2021 | 132 | $1.15B |
| Q3 2021 | 123 | $938.0M |
| Q2 2021 | 115 | $861.9M |
| Q1 2021 | 130 | $1.08B |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding Syndax Pharmaceuticals Inc; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Principal Securities, Inc. | 400 | $6.15K | 0.00% | 00.0% | Unchanged |
| Truvestments Capital LLC | 331 | $5.09K | 0.00% | −495−59.9% | Reduced |
| Daiwa Securities Group Inc. | 314 | $5.00K | 0.00% | 00.0% | Unchanged |
| C M Bidwell & Associates Ltd | 308 | $4.74K | 0.00% | +308 | New |
| Jones Financial Companies LLLP | 275 | $4.31K | 0.00% | 00.0% | Unchanged |
| Steward Partners Investment Advisory, LLC | 231 | $3.55K | 0.00% | 00.0% | Unchanged |
| Sunbelt Securities, Inc. | 230 | $3.54K | 0.00% | +230 | New |
| True Wealth Design, LLC | 209 | $3.22K | 0.00% | +184+736.0% | Added |
| Washington Trust Advisors, Inc. | 209 | $3.21K | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 202 | $3.11K | 0.00% | −1−0.5% | Reduced |
| Crowley Wealth Management, Inc. | 200 | $3.08K | 0.00% | 00.0% | Unchanged |
| GAMMA Investing LLC | 185 | $2.85K | 0.00% | +142+330.2% | Added |
| Global Retirement Partners, LLC | 158 | $2.42K | 0.00% | −157−49.8% | Reduced |
| Brown Brothers Harriman & Co | 128 | $1.97K | 0.00% | 00.0% | Unchanged |
| Smartleaf Asset Management LLC | 95 | $1.48K | 0.00% | +44+86.3% | Added |
| Rothschild Investment LLC | 95 | $1.46K | 0.00% | +40+72.7% | Added |
| Clearstead Advisors, LLC | 88 | $1.35K | 0.00% | +88 | New |
| Bellevue Asset Management, LLC | 79 | $1.22K | 0.00% | +79 | New |
| Massmutual Trust Co FSB | 71 | $1.09K | 0.00% | 00.0% | Unchanged |
| Avion Wealth | 100 | $1.00K | 0.00% | 00.0% | Unchanged |
| IFP Advisors, Inc | 51 | $785 | 0.00% | +51 | Added |
| Caitong International Asset Management Co., Ltd | 47 | $723 | 0.00% | −1,230−96.3% | Reduced |
| Assetmark, Inc | 40 | $615 | 0.00% | +40 | New |
| Farther Finance Advisors, LLC | 37 | $569 | 0.00% | +14+60.9% | Added |
| Parkside Financial Bank & Trust | 35 | $539 | 0.00% | +35 | New |
| Quadrant Capital Group LLC | 3 | $47 | 0.00% | +3 | New |
| Covestor Ltd | 8 | $0 | 0.00% | −29−78.4% | Reduced |
| Sofinnova Investments, Inc. | 0 | $0 | 0.00% | −1,524,440−100.0% | Sold out |
| Nantahala Capital Management, LLC | 0 | $0 | 0.00% | −754,503−100.0% | Sold out |
| Casdin Capital, LLC | 0 | $0 | 0.00% | −650,000−100.0% | Sold out |
| Caption Management, LLC | 0 | $0 | 0.00% | −504,471−100.0% | Sold out |
| Saturn V Capital Management LLC | 0 | $0 | 0.00% | −500,551−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −160,327−100.0% | Sold out |
| Healthcare of Ontario Pension Plan Trust Fund | 0 | $0 | 0.00% | −155,000−100.0% | Sold out |
| Avidity Partners Management LP | 0 | $0 | 0.00% | −150,000−100.0% | Sold out |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −126,145−100.0% | Sold out |
| Polar Asset Management Partners Inc. | 0 | $0 | 0.00% | −97,113−100.0% | Sold out |
| UBS Oconnor LLC | 0 | $0 | 0.00% | −90,441−100.0% | Sold out |
| Campbell & CO Investment Adviser LLC | 0 | $0 | 0.00% | −46,829−100.0% | Sold out |
| Nebula Research & Development LLC | 0 | $0 | 0.00% | −27,231−100.0% | Sold out |
| Jacobs Levy Equity Management, Inc | 0 | $0 | 0.00% | −23,530−100.0% | Sold out |
| Bryce Point Capital, LLC | 0 | $0 | 0.00% | −21,109−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −19,921−100.0% | Sold out |
| Freestone Grove Partners LP | 0 | $0 | 0.00% | −15,457−100.0% | Sold out |
| DRW Securities, LLC | 0 | $0 | 0.00% | −14,135−100.0% | Sold out |
| Atom Investors LP | 0 | $0 | 0.00% | −13,104−100.0% | Sold out |
| Optimize Financial Inc | 0 | $0 | 0.00% | −12,141−100.0% | Sold out |
| ADAR1 Capital Management, LLC | 0 | $0 | 0.00% | −10,000−100.0% | Sold out |
| Lazard Asset Management LLC | 0 | $0 | 0.00% | −7,142−100.0% | Sold out |
| Walleye Trading LLC | 0 | $0 | 0.00% | −1,940−100.0% | Sold out |
| Skopos Labs, Inc. | 0 | $0 | 0.00% | −260−100.0% | Sold out |
| Parallel Advisors, LLC | 0 | $0 | 0.00% | −96−100.0% | Sold out |
| Signaturefd, LLC | 0 | $0 | 0.00% | −73−100.0% | Sold out |
| TD Private Client Wealth LLC | 0 | $0 | 0.00% | −54−100.0% | Sold out |
| Bessemer Group Inc | 0 | $0 | 0.00% | −49−100.0% | Sold out |
| E Fund Management Co., Ltd. | – | – | – | – | Not filed |
| CIBC World Markets Corp | – | – | – | – | Not filed |