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Syndax Pharmaceuticals Inc (SNDX)

Syndax Pharmaceuticals Inc (SNDX) Insider Trading

Directors, officers and holders of more than 10% of SNDX report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.

Recent Form 4 transactions

The 50 most recent of 79 transactions on file: 0 with code P, 15 with code S and 35 with other codes.

DateInsiderCodeShares
Oct 29, 2026Podlesak DennisM Exercise8,000
Oct 29, 2026Podlesak DennisM Exercise8,000
Oct 29, 2026Podlesak DennisS Sale8,000
Jul 8, 2026Metzger Michael AM Exercise32,375
Jul 8, 2026Metzger Michael AM Exercise32,375
Jul 8, 2026Metzger Michael AS Sale32,375
Jun 12, 2026Botwood Nicholas A.J.S Sale31,235
Jun 12, 2026Botwood Nicholas A.J.M Exercise31,235
Jun 12, 2026Botwood Nicholas A.J.M Exercise31,235
Jun 11, 2026Botwood Nicholas A.J.M Exercise22,515
Jun 11, 2026Botwood Nicholas A.J.S Sale34,280
Jun 11, 2026Botwood Nicholas A.J.M Exercise22,515
Jun 1, 2026Goldan Keith A.S Sale1,177
Jun 1, 2026Metzger Michael AS Sale6,847
Feb 9, 2026Goldan Keith A.S Sale3,410
Feb 9, 2026Metzger Michael AS Sale17,159
Feb 6, 2026Goldan Keith A.S Sale2,082
Feb 6, 2026Metzger Michael AS Sale7,412
Feb 4, 2026Rizo AleksandraA Award24,000
Feb 4, 2026Katkin KeithA Award24,000
Feb 4, 2026Podlesak DennisA Award48,000
Feb 4, 2026Legault PierreA Award24,000
Feb 4, 2026Metzger Michael AA Award440,000
Feb 4, 2026Goldan Keith A.A Award118,000
Feb 4, 2026Botwood Nicholas A.J.A Award144,700
Feb 4, 2026Botwood Nicholas A.J.A Award36,000
Feb 4, 2026Botwood Nicholas A.J.A Award24,000
Feb 4, 2026Goldan Keith A.A Award30,750
Feb 4, 2026Goldan Keith A.A Award21,500
Feb 4, 2026Metzger Michael AA Award73,000
Feb 4, 2026Jarrett JenniferA Award24,000
Feb 4, 2026Huber Martin H. Jr.A Award24,000
Feb 4, 2026Metzger Michael AA Award144,600
Jan 30, 2026Goldan Keith A.J Other1,219
Dec 1, 2025Goldan Keith A.G Gift1,224
Sep 8, 2025Metzger Michael AM Exercise157,307
Sep 8, 2025Metzger Michael AM Exercise157,307
Sep 8, 2025Metzger Michael AS Sale157,307
Aug 18, 2025Podlesak DennisM Exercise19,200
Aug 18, 2025Podlesak DennisM Exercise19,200
Aug 18, 2025Podlesak DennisS Sale19,200
Aug 15, 2025Podlesak DennisM Exercise4,800
Aug 15, 2025Podlesak DennisM Exercise14,400
Aug 15, 2025Podlesak DennisM Exercise19,200
Aug 15, 2025Podlesak DennisS Sale19,200
Aug 14, 2025Podlesak DennisS Sale19,200
Aug 14, 2025Podlesak DennisM Exercise19,200
Aug 14, 2025Podlesak DennisM Exercise19,200
Jul 31, 2025Goldan Keith A.J Other1,226
Jul 16, 2025Metzger Michael AS Sale7,534

The full Form 4 history is on the SNDX company page (Insider Trades card, View all).

Questions about this data

Which insider transactions are open-market trades?

Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.

How quickly are insider trades reported?

A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.

Who has to file Form 4?

Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.

Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.