Syndax Pharmaceuticals SNDX Institutional Ownership

NASDAQ SNDX

$18.80 +0.56 (+3.07%)

At close: Sep 30, 2026 · 4:00 PM EDT

Institutions by Trading Activity

243 Institutions

Increased 134 55.1%

Unchanged 33 13.6%

Reduced 76 31.3%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

122.38%

▲+10.68 pp QoQ

Shares Held by Institutions

108.91Mn

of 88.99Mn outstanding

▲+16.61% QoQ

Shares Outstanding

88.99Mn

-19.92Mn held outside 13F filers

Institutional Investors

243

filed 13F for Jun 2026

■0 vs prior quarter

Net Shares Added (QoQ)

+15.51Mn

accumulated since last quarter

Value of Holdings

$2.05Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Syndax Pharmaceuticals Inc (NASDAQ:SNDX) has 243 institutional investors with active 13F positions as of June 2026.

Their combined ownership stood at 122.4% of outstanding shares in June 2026, up from 111.7% in March 2026.
They increased total shares held in Syndax Pharmaceuticals by 16.61% from last quarter, and the number of investors in SNDX increased 12.5% annually.
During the quarter, 134 of these 243 funds increased positions in SNDX, 76 reduced exposure, and 33 held steady.
Institutional investors collectively held 108.91Mn shares in Syndax Pharmaceuticals as of June 2026, up by 15.51Mn shares quarter on quarter, and up 8.82Mn shares year over year.
As of June 30, 2026, BlackRock, Inc. held the largest stake in Syndax Pharmaceuticals with 9.02Mn shares, accounting for 10.14% of total shares outstanding.
The biggest buyers of Syndax Pharmaceuticals for the quarter ending June 2026 included MILLENNIUM MANAGEMENT LLC (1.85Mn), State Street Corp (1.23Mn), Prosight Management, LP (1.2Mn), LOOMIS SAYLES & CO L P (923.62K), Goldman Sachs Group Inc (864.48K).
Top sellers of SNDX stock for the quarter ending June 2026 included Walleye Capital LLC (379.34K), CITADEL ADVISORS LLC (372.66K), D. E. Shaw & Co., Inc. (361.94K), Morgan Stanley (304.95K), Bank Of America Corp /De/ (204.74K).
Per Business Quant data, the top 10 holders of Syndax Pharmaceuticals for the quarter ending June 2026 are BlackRock, Inc. (9.02Mn), Kynam Capital Management, LP (8.05Mn), Goldman Sachs Group Inc (5.86Mn), State Street Corp (5.66Mn), Bank Of America Corp /De/ (4.05Mn), VANGUARD CAPITAL MANAGEMENT LLC (3.93Mn), DEERFIELD MANAGEMENT COMPANY, L.P. (3.78Mn), Eversept Partners, LP (2.8Mn), GEODE CAPITAL MANAGEMENT, LLC (2.58Mn), Hood River Capital Management LLC (2.56Mn).

Form 13F Holdings

243 Institutional Holders

Report period 30 Jun, 2026

Total shares held 108.91Mn

Of outstanding 122.38%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	9,020,006	10.14%	▲765,580	+9.27%	$197.18Mn
2	Kynam Capital Management, LP	0001907884	8,050,959	9.05%	0	0.00%	$175.99Mn
3	Goldman Sachs Group Inc	0000886982	5,861,265	6.59%	▲864,478	+17.30%	$128.13Mn
4	State Street Corp	0000093751	5,658,424	6.36%	▲1,228,348	+27.73%	$123.69Mn
5	Bank Of America Corp /De/	0000070858	4,045,094	4.55%	▼204,742	-4.82%	$88.43Mn
6	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	3,927,892	4.41%	▲105,313	+2.76%	$85.86Mn
7	DEERFIELD MANAGEMENT COMPANY, L.P.	0001009258	3,779,900	4.25%	0	0.00%	$82.63Mn
8	Eversept Partners, LP	0001697013	2,798,210	3.14%	▼87,412	-3.03%	$61.17Mn
9	GEODE CAPITAL MANAGEMENT, LLC	0001214717	2,584,136	2.90%	▲427,078	+19.80%	$56.50Mn
10	Hood River Capital Management LLC	0001578177	2,564,279	2.88%	▲209,994	+8.92%	$56.06Mn
11	KINGDON CAPITAL MANAGEMENT, L.L.C.	0001000097	2,500,000	2.81%	0	0.00%	$54.65Mn
12	Franklin Templeton Inc	0000038777	2,286,499	2.57%	▲136,420	+6.34%	$49.98Mn
13	MILLENNIUM MANAGEMENT LLC	0001273087	2,053,960	2.31%	▲1,854,436	+929.43%	$44.90Mn
14	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	1,921,796	2.16%	▲184,655	+10.63%	$42.01Mn
15	UBS Group AG	0001610520	1,893,750	2.13%	▲740,088	+64.15%	$41.40Mn
16	Elmind Capital, LP	0002052213	1,855,000	2.08%	0	0.00%	$40.55Mn
17	BNP Paribas Asset Management Holding S.A.	0001520354	1,790,173	2.01%	▲57,632	+3.33%	$39.13Mn
18	Candriam S.C.A.	0001537014	1,696,040	1.91%	▲770,708	+83.29%	$37.04Mn
19	Soleus Capital Management, L.P.	0001802630	1,628,039	1.83%	▼98,869	-5.73%	$35.59Mn
20	TWO SIGMA INVESTMENTS, LP	0001179392	1,578,125	1.77%	▼1,471	-0.09%	$34.50Mn

Showing 1 to 20 of 243 holders