Syndax Pharmaceuticals Inc
$12.90-5.5%
+$361.2M
Net Activity
+10.79% total shares
Institutions Holding
242
Popularity Rank
#2575
Avg Weight
0.36%
Total Value
$2.5B
Market Cap
$1.1B
242 institutions currently hold SNDX, with 134 net buyers and 118 net sellers this quarter.
Institutional Moves (Q2 2026)
Neutral
Based on recent trading activity
Net Selling Institutions
118
Net Buying Institutions
134
Top 5 by Value
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Across its top 20 institutional holders, SNDX's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 9/100, avg. turnover score 42/100).
SNDX ranks #2575 out of 37696 tracked stocks by institutional interest — one of the most closely watched names in our coverage.
SNDX is a top-conviction position for Elmind Capital, LP — at 10.2% of their entire disclosed 13F portfolio, it's one of their largest single bets, not just a passing allocation.
The largest dollar stake in SNDX belongs to BlackRock, Inc., but the position matters far more to Elmind Capital, LP, who has 10.2% of their own portfolio riding on it — a reminder that the biggest holder by size and the holder with the biggest bet aren't always the same fund.
Harbour Capital Advisors, LLC has added to its SNDX position for two straight quarters, increasing it by $360.1K to reach $661.5K today.
Wealth Enhancement Advisory Services, LLC has trimmed its SNDX position for two straight quarters, cutting it by $212.5K while still holding $354.5K.
SNDX is down 5.5% today, but institutions show net buying of $361.2M this quarter — a divergence between today's price move and the underlying institutional flow.
SNDX reported a net loss of $220.8M over the trailing twelve months.
+$530.1M
Total Buy Value
$215.3M
Total Sell Value
134
Net Buyers
118
Net Sellers
SNDX
Q2 2026
Top 5 Institutional Movers
-$46.4M
+$40.2M
-$28.5M
+$20.2M
SNDX does not currently have enough recent insider (Form 4) trading activity to compute a convergence signal against its 13F institutional flows.
13F data as of 2026-09-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.
No Form 144 planned sale filings in the last 90 days
No Schedule 13D/13G filings for this ticker
1
Filings (14d)
On August 4, 2026, Syndax Pharmaceuticals (SNDX) issued a press release and an investor presentation covering its financial results for the quarter and full year ended June 30, 2026. Both documents were attached to this 8-K as Exhibits 99.1 and 99.2. The filing excerpt itself is just a routine cover notice, so no actual revenue or earnings figures appear in it.
View Full Filing (SEC EDGAR)87164F105
The most-added stocks by 13F institutions this quarter
Institutions Holding
6,278
Total reported value
$2.2T
3254 13F institutions increased their position this quarter
Institutions Holding
6,025
Total reported value
$3.6T
3054 13F institutions increased their position this quarter
Institutions Holding
6,188
Total reported value
$1.8T
2995 13F institutions increased their position this quarter
The most widely held stocks tracked across all 13F institutions
Institutions Holding
4,716
Total reported value
$473.6B
Held by 4716 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,662
Total reported value
$986.0B
Held by 4662 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,610
Total reported value
$529.1B
Held by 4610 institutions — one of the most-tracked stocks on AlphaSMO
Access SNDX's institutional ownership data programmatically:
REST API
curl https://alphasmo.com/api/v1/market/stock/SNDXCLI
npx alphasmo stocks get SNDX