$SNDX

$13.69 +$0.47 (3.56%) Close

$SNDX Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 89.3M shares outstanding

Who owns SNDX?

By type of holder

Institutions 100.0% Insiders 0.0% Everyone else 0.0%

Concentration Top 10 holders own 54.1%

BlackRock, Inc. 10.1% · Kynam Capital Management, LP 9.0%

Institutional ownership

100.0%

0 pts vs last qtr

Institutional holders

241

-5 vs last qtr

Net shares bought

+8.3M

by institutions in Q2 2026

New / sold out

37 / 42

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Millennium Management LLC +1.9M
State Street Corp +1.2M

Biggest sellers in Q2 2026

Point72 Asset Management, L.P. SOLD OUT −2.0M
Stempoint Capital LP SOLD OUT −1.2M

Who is planning to sell?

Notices of proposed sale, last 12 months

$2.71M

9 notices from 4 people

Shares covered

136.0K

0.15% of the company

Arranged in advance

71%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Botwood Nicholas A.J. Officer 10b5-1 $1.18M
Michael Metzger Director 10b5-1 $752K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2021–FY2025

+61.5%

+12.74% a year

Each share's claim on the business

−38.1%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $151M

over 5 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years43% 3–5 years22% 1–3 years17% Under 1 year19%

Quarterly turnover

13.4%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting SNDX on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	9.0M	10.10%	+765.6K (+9.3%)	≤2021	0.0%
Shares held by quarter Peak holding10.5M (Q2'25) Change over 8 quarters+781.0K Share of the company10.100% BlackRock, Inc.'s full portfolio →
KC Kynam Capital Management, LP	8.1M	9.02%	Unchanged	2021	9.7%
Shares held by quarter Peak holding8.5M (Q4'24) Change over 8 quarters+2.2M Share of the company9.020% Kynam Capital Management, LP's full portfolio →

BlackRock, Inc.

9.0M

% of company

10.10%

Change vs last qtr

+765.6K (+9.3%)

Held since

≤2021

Kynam Capital Management, LP

8.1M

% of company

9.02%

Change vs last qtr

Unchanged

Held since

2021

28 more super investors behind a free account

See every manager holding Syndax Pharmaceuticals, Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting SNDX on Form N-PORT; together they hold 29.9% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
SS State Street(R) SPDR(R) S&P(R) Biotech ETF SPDR Series Trust	$77.1M	3.5M	3.95%	0.72%	June 30, 2026
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$61.7M	2.8M	3.16%	0.00%	June 30, 2026

State Street(R) SPDR(R) S&P(R) Biotech ETF

SPDR Series Trust

Position value

$77.1M

% of company

3.95%

% of the fund

0.72%

As of

June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$61.7M

% of company

3.16%

% of the fund

0.00%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Syndax Pharmaceuticals, Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
MM Metzger Michael A Insider	484.8K	0.54%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.540% Metzger Michael A's insider activity →
PD Podlesak Dennis Insider	239.8K	0.27%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.270% Podlesak Dennis's insider activity →

Metzger Michael A

Insider

484.8K

% of company

0.54%

Change vs last qtr

—

Held since

—

Podlesak Dennis

Insider

239.8K

% of company

0.27%

Change vs last qtr

—

Held since

—

9 more holders behind a free account

See every insider and 5%+ holder of Syndax Pharmaceuticals, Inc..

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