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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1109196	Mabvax Therapeutics Holdings Inc.	TELK	Pharmaceutical Preparations (2834)	930987903

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1611978	J. Jim Antonopoulos	11588 Sorrento Valley Road, Suite 20 San Diego CA 92121		No	No	No	Yes

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2014-09-12	33,150	$3.62	33,150	No	4	X	Direct
Common Stock	Disposition	2014-09-12	11,892	$6.00	21,258	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	X	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Common Stock Warrant	Disposition	2014-09-12	33,150	$0.00	33,150	$3.62

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2014-09-03	2023-07-10	No	4	X	Direct

Footnotes

On September 12, 2014, the reporting person exercised a warrant to purchase 33,150 shares of MabVax Therapeutics Holdings, Inc. ("MabVax") common stock for $3.62 a share. The reporting person paid the exercise price on a cashless basis, resulting in MabVax's withholding of 11,892 of the warrant shares to pay the exercise price and issuing to the reporting person the remaining 21,258 shares. The amount of warrant shares withheld to pay the cashless exercise price was calculated in accordance with the terms of the Form of Waiver Letter filed as Exhibit 10.2 of MabVax's Current Report on Form 8-K filed with the SEC on September 3, 2014. In lieu of issuing a fractional share, MabVax rounded-up to the next full share in accordance with the terms of the Common Stock Warrant.