Small Derek A

Director at YALE SECURITIES LTD · on record since May 6, 2026
Director at ASSEMBLY BIOSCIENCES, INC. · on record since Jul 15, 2014
CEO and President at ASSEMBLY BIOSCIENCES, INC. · on record since Mar 30, 2018

Insider trading activity of Small Derek A

Transactions on record: 16; since Feb 12, 2016

Open-market buys: 4; $154.8K

Open-market sells: 0

Companies traded: 2; last filing May 6, 2026

Figures computed from official regulatory filings — .

Companies where Small Derek A has traded

YALE SECURITIES LTD6 tx · May 6, 2026
ASSEMBLY BIOSCIENCES, INC.10 tx · $154.8K · Jan 3, 2020

Track record of Small Derek A

Insufficient history for a statistical track record (fewer than 5 open-market buys).

Transaction history of Small Derek A

Co-insiders of Small Derek A

ABERCROMBIE GEORGE BYALE SECURITIES LTD
Aguiar Michael WYALE SECURITIES LTD
ALTIG ANTHONY EASSEMBLY BIOSCIENCES, INC.
Arnold Lee DASSEMBLY BIOSCIENCES, INC.
AUERBACH MARKASSEMBLY BIOSCIENCES, INC.
Barbosa MiguelASSEMBLY BIOSCIENCES, INC.
BARRETT DAVID JONATHANASSEMBLY BIOSCIENCES, INC.
Basso StephenYALE SECURITIES LTD
Bickerstaff GeorgeYALE SECURITIES LTD
Birx DeborahYALE SECURITIES LTD
Bjorkquist Jeanette MASSEMBLY BIOSCIENCES, INC.
Cihlar TomasASSEMBLY BIOSCIENCES, INC.
Colonno Richard JamesASSEMBLY BIOSCIENCES, INC.
Consylman GinaASSEMBLY BIOSCIENCES, INC.
Cook Robert Donald IIASSEMBLY BIOSCIENCES, INC.
COOPER GRAHAM KASSEMBLY BIOSCIENCES, INC.
CRAFTERS MARKETPLACEYALE SECURITIES LTD
DAHLBERG KEVIN LYALE SECURITIES LTD
Delaney William E IVASSEMBLY BIOSCIENCES, INC.
Denner Alexander JYALE SECURITIES LTD
dEsparbes EricYALE SECURITIES LTD
DiMarchi Richard DASSEMBLY BIOSCIENCES, INC.
DiPaolo MarkYALE SECURITIES LTD

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
YALE SECURITIES LTDListing unverified	May 6, 2026	Award	9,786	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
YALE SECURITIES LTDListing unverified	May 6, 2026	AwardD (derivative)	10,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
YALE SECURITIES LTDListing unverified	May 21, 2025	AwardD (derivative)	10,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
YALE SECURITIES LTDListing unverified	May 21, 2025	Award	12,077	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
YALE SECURITIES LTDListing unverified	Jun 20, 2024	AwardD (derivative)	10,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
YALE SECURITIES LTDListing unverified	Jun 20, 2024	Award	13,923	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ASSEMBLY BIOSCIENCES, INC.Listing on record	Jan 3, 2020	Award	125,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ASSEMBLY BIOSCIENCES, INC.Listing on record	Apr 2, 2019	Award	32,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ASSEMBLY BIOSCIENCES, INC.Listing on record	Apr 2, 2019	AwardD (derivative)	65,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ASSEMBLY BIOSCIENCES, INC.Listing on record	Jul 20, 2018	Buy	1,200	41.77 USD	$50.1K	conv 52First in 12mo	SEC
ASSEMBLY BIOSCIENCES, INC.Listing on record	Jul 20, 2018	Buy	1,200	41.19 USD	$49.4K	conv 52First in 12mo	SEC
ASSEMBLY BIOSCIENCES, INC.Listing on record	Mar 30, 2018	Award	32,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ASSEMBLY BIOSCIENCES, INC.Listing on record	Mar 30, 2018	AwardD (derivative)	65,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ASSEMBLY BIOSCIENCES, INC.Listing on record	Mar 31, 2017	AwardD (derivative)	40,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ASSEMBLY BIOSCIENCES, INC.Listing on record	Feb 12, 2016	Buy	1,555	5.56 USD	$8.6K	conv 43	SEC
ASSEMBLY BIOSCIENCES, INC.Listing on record	Feb 12, 2016	Buy	8,445	5.52 USD	$46.6K	conv 53First in 12mo	SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
YALE SECURITIES LTDListing unverified	May 6, 2026	Award	9,786	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
YALE SECURITIES LTDListing unverified	May 6, 2026	AwardD (derivative)	10,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
YALE SECURITIES LTDListing unverified	May 21, 2025	AwardD (derivative)	10,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
YALE SECURITIES LTDListing unverified	May 21, 2025	Award	12,077	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
YALE SECURITIES LTDListing unverified	Jun 20, 2024	AwardD (derivative)	10,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
YALE SECURITIES LTDListing unverified	Jun 20, 2024	Award	13,923	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ASSEMBLY BIOSCIENCES, INC.Listing on record	Jan 3, 2020	Award	125,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ASSEMBLY BIOSCIENCES, INC.Listing on record	Apr 2, 2019	Award	32,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ASSEMBLY BIOSCIENCES, INC.Listing on record	Apr 2, 2019	AwardD (derivative)	65,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ASSEMBLY BIOSCIENCES, INC.Listing on record	Jul 20, 2018	Buy	1,200	41.77 USD	$50.1K	conv 52First in 12mo	SEC
ASSEMBLY BIOSCIENCES, INC.Listing on record	Jul 20, 2018	Buy	1,200	41.19 USD	$49.4K	conv 52First in 12mo	SEC
ASSEMBLY BIOSCIENCES, INC.Listing on record	Mar 30, 2018	Award	32,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ASSEMBLY BIOSCIENCES, INC.Listing on record	Mar 30, 2018	AwardD (derivative)	65,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ASSEMBLY BIOSCIENCES, INC.Listing on record	Mar 31, 2017	AwardD (derivative)	40,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ASSEMBLY BIOSCIENCES, INC.Listing on record	Feb 12, 2016	Buy	1,555	5.56 USD	$8.6K	conv 43	SEC
ASSEMBLY BIOSCIENCES, INC.Listing on record	Feb 12, 2016	Buy	8,445	5.52 USD	$46.6K	conv 53First in 12mo	SEC