What does CUSIP 87164F105 represent in this 13F holders report?

CUSIP 87164F105 is the security identifier for SNDX - Syndax Pharmaceuticals Inc - COMMON STOCK used to aggregate holder disclosures.

How many institutions held SNDX - Syndax Pharmaceuticals Inc - COMMON STOCK in Q4 2020?

140 institutional investors reported SNDX - Syndax Pharmaceuticals Inc - COMMON STOCK for Q4 2020. Use the holders table for investor-level position and value details.

Syndax Pharmaceuticals Inc - COMMON STOCK (SNDX)

CUSIP: 87164F105

Q4 2020 13F Holders as of 31 Dec 2020

Security type / class: Equity / COMMON STOCK
Total 13F shares: 46,493,166
Total 13F value: $1,034,139,433
Share change: +11,444,024
Put/Call ratio: 42%
SEC-reported price per share: $22.24
Number of holders: 140
Value change: +$269,937,051
Number of buys: 95
Number of sells: 34
Shares outstanding: 88,413,516

Security key

87164F105

Report period

Q4 2020

Institutions

140

Top holders

SNDX full security history Ownership snapshot Full 13F holder table Newer quarter: Q3 2026 Syndax Pharmaceuticals Inc SEC filings Syndax Pharmaceuticals Inc company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 87164F105

Newer quarter: Q3 2026

Recent filing periods:

Q3 2026

Ownership snapshot

Top reported holders of SNDX - Syndax Pharmaceuticals Inc - COMMON STOCK (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

WELLINGTON MANAGEMENT GRO...

Disclosed value leader

WELLINGTON MANAGEMENT GRO...

Comparable rows

0/15

Latest evidence

30 Sep 2020

13F Highest disclosed value: $49,159,000 15 rows are not safely comparable across share classes. Showing 1-6 of 15 holder rows.

Quick read

WELLINGTON MANAGEMENT GROUP LLP has the largest disclosed position value at $49.16M.

0 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens WELLINGTON MANAGEMENT GROUP LLP's linked filing trail.

Disclosed position value Top 5

WELLINGTON MANAGEMENT GROUP LLP $49.16M

BVF INC/IL $36.47M

Boxer Capital, LLC $33.77M

BlackRock Finance, Inc. $27.7M

Avidity Partners Management LP $27.37M

Value bars compare disclosed positions; verify each figure against the linked filing evidence.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
WELLINGTON MANAGEMENT GROUP LLP	13F Company 13F	— denominator unverified	$49,159,000 3,330,568 shares	—	30 Sep 2020
BVF INC/IL	13F Company 13F	— denominator unverified	$36,467,000 2,470,678 shares	—	30 Sep 2020
Boxer Capital, LLC	13F Company 13F	— denominator unverified	$33,768,000 2,287,782 shares	—	30 Sep 2020
BlackRock Finance, Inc.	13F Company 13F	— denominator unverified	$27,695,000 1,876,358 shares	—	30 Sep 2020
Avidity Partners Management LP	13F Company 13F	— denominator unverified	$27,367,000 1,854,100 shares	—	30 Sep 2020
MPM ASSET MANAGEMENT LLC	13F Company 13F	— denominator unverified	$27,208,000 1,843,388 shares	—	30 Sep 2020

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q4 2020

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

140

46,493,166

Rows available

140

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q4 2020 vs Q3 2020 Across Filers

Q3 2020 holders

Q4 2020 holders

140

Holder diff

Investor	Q3 2020 Shares	Q4 2020 Shares	Share Diff	Share Chg %	Q3 2020 value	Q4 2020 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend