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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1420565	Aileron Therapeutics Inc	ALRN	Pharmaceutical Preparations (2834)	000000000

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1656151	Armen Shanafelt	C/O Lilly Ventures 115 West Washinton St. Suite 1680-South Indianapolis IN 46204		Yes	No	No	No

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	2017-07-05	844,987	$0.00	844,987	No	4	C	Indirect	See Footnote
Common Stock	Acquisiton	2017-07-05	250,000	$15.00	1,094,987	No	4	P	Indirect	See Footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	C	Indirect	See Footnote
No	4	P	Indirect	See Footnote

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Series D Preferred Stock	Disposition	2017-07-05	3,390,885	$0.00	341,238	$0.00
Common Stock	Series E-2 Preferred Stock	Disposition	2017-07-05	1,907,373	$0.00	191,946	$0.00
Common Stock	Series E-3 Preferred Stock	Disposition	2017-07-05	1,654,411	$0.00	166,489	$0.00
Common Stock	Series F Preferred Stock	Disposition	2017-07-05	1,443,972	$0.00	145,312	$0.00

Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect

Footnotes

The Series D, Series E-2, Series E-3 and Series F Preferred Stock converted into Common Stock on a 9.937-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Series D, Series E-2, Series E-3 and Series F Preferred Stock were convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial pubic offering. The shares had no expiration date.
These shares are held directly by Lilly Ventures Fund I LLC, or LVFI. LV Management Group, LLC, or LVMG, is the management company for LVFI and as such may be deemed to indirectly beneficially own the shares held by LVFI. LVMG's voting and dispositive decisions with respect to the shares held by LVFI are made by LVMG's management committee, which includes the Reporting Person. The Reporting Person disclaims beneficial ownership of the reported securities except to the extent of his proportionate pecuniary interest therein.