Syndax Pharmaceuticals Inc - Common Stock, par value $0.0001 per share (SNDX)

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

CUSIP 87164F105 is the security identifier for SNDX - Syndax Pharmaceuticals Inc - Common Stock, par value $0.0001 per share used to aggregate holder disclosures.

Q: How many institutions held SNDX - Syndax Pharmaceuticals Inc - Common Stock, par value $0.0001 per share in Q4 2019?

71 institutional investors reported SNDX - Syndax Pharmaceuticals Inc - Common Stock, par value $0.0001 per share for Q4 2019. Use the holders table for investor-level position and value details.

CUSIP: 87164F105

Q4 2019 13F Holders as of 31 Dec 2019

Security type / class: Equity / Common Stock, par value $0.0001 per share
Total 13F shares: 16,674,566
Total 13F value: $146,400,674
Share change: -471,003
Put/Call ratio: 32%
SEC-reported price per share: $8.78
Number of holders: 71
Value change: -$3,736,906
Number of buys: 31
Number of sells: 31
Shares outstanding: 86,328,130

Security key

87164F105

Report period

Q4 2019

Institutions

Top holders

SNDX full security history Ownership snapshot Full 13F holder table Newer quarter: Q1 2020 Previous quarter: Q3 2019 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: Q1 2020 Previous quarter: Q3 2019

Recent filing periods:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Ownership snapshot

Top reported holders of SNDX - Syndax Pharmaceuticals Inc - Common Stock, par value $0.0001 per share (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

15/15

Latest evidence

30 Sep 2019

13F Lead comparable stake: 3.6% Showing 1-6 of 15 holder rows.

Quick read

WELLINGTON MANAGEMENT GROUP LLP leads the comparable SEC ownership view at 3.6%.

15 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.

Comparable ownership Top 5

WELLINGTON MANAGEMENT GROUP LLP 3.6%

MPM ASSET MANAGEMENT LLC 2.5%

BVF INC/IL 2%

BlackRock Finance, Inc. 2%

ADAGE CAPITAL PARTNERS GP, L.L.C. 1.4%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

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	3.6%	$23,137,000 3,097,523 shares	—	30 Sep 2019
MPM ASSET MANAGEMENT LLC	13F Company 13F	2.5%	$16,200,000 2,168,691 shares	—	30 Sep 2019
BVF INC/IL	13F Company 13F	2%	$13,183,000 1,764,784 shares	—	30 Sep 2019
BlackRock Finance, Inc.	13F Company 13F	2%	$12,799,000 1,713,304 shares	—	30 Sep 2019
ADAGE CAPITAL PARTNERS GP, L.L.C.	13F Company 13F	1.4%	$9,338,000 1,250,000 shares	—	30 Sep 2019
683 Capital Management, LLC	13F Company 13F	1.4%	$8,751,000 1,171,648 shares	—	30 Sep 2019

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 2019

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

Institutions

16,674,566

Rows available

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 2019 vs Q3 2019 Across Filers

Q3 2019 holders

Q4 2019 holders

Holder diff

-1

Investor	Q3 2019 Shares	Q4 2019 Shares	Share Diff	Share Chg %	Q3 2019 value	Q4 2019 value	Value change	Value Chg %

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

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend