OSSER LEONARD

10% owner at Nexalin Technology, Inc. · on record since Sep 30, 2025
Director at MILESTONE SCIENTIFIC INC. · on record since Feb 3, 2010
10% owner at MILESTONE SCIENTIFIC INC. · on record since Feb 3, 2010
Director at MORGAN STANLEY · on record since Oct 2, 2003
Chief Executive Officer at MORGAN STANLEY · on record since Oct 2, 2003
10% owner at MORGAN STANLEY · on record since Oct 2, 2003
Interim CEO at MILESTONE SCIENTIFIC INC. · on record since Feb 8, 2019
Spouse at Nexalin Technology, Inc. · on record since Sep 29, 2022

Insider trading activity of OSSER LEONARD

Transactions on record: 129; since Oct 2, 2003

Open-market buys: 8; $162B

Open-market sells: 50; $1.5M

Companies traded: 3; last filing Sep 30, 2025

Figures computed from official regulatory filings — .

Companies where OSSER LEONARD has traded

Nexalin Technology, Inc.7 tx · $204.3K · Sep 30, 2025
MILESTONE SCIENTIFIC INC.111 tx · $6.3M · Oct 23, 2024
MORGAN STANLEY11 tx · $162B · Oct 3, 2005

Track record of OSSER LEONARD

Statistical track record

Free account

Open-market buys: 16

Last buy: Sep 28, 2022

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Transaction history of OSSER LEONARD

Co-insiders of OSSER LEONARD

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
Nexalin Technology, Inc.Listing on record	Sep 30, 2025	Award	83,333	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Nexalin Technology, Inc.Listing on record	Sep 12, 2025	SellD (derivative)	-23,150	0.02 USD	$463		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Oct 23, 2024	Sell	-107,984	0.93 USD	$100.4K	Unusual size	SEC
Nexalin Technology, Inc.Listing on record	Sep 25, 2024	Award	700,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Aug 30, 2024	Award	112,356	0.89 USD	$100K		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Aug 21, 2024	Sell	-141,913	0.95 USD	$134.8K	Unusual size	SEC
Nexalin Technology, Inc.Listing on record	Oct 5, 2023	BuyD (derivative)	9,500	0.40 USD	$3.8K	Cluster	SEC
MILESTONE SCIENTIFIC INC.Listing on record	Aug 10, 2023	Award	112,360	0.89 USD	$100K		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Oct 11, 2022	Award	121,951	0.82 USD	$100K		SEC
Nexalin Technology, Inc.Listing on record	Sep 29, 2022	Buy	9,500	1.12 USD	$10.6K	conv 23Cluster	SEC
Nexalin Technology, Inc.Listing on record	Sep 20, 2022	Buy	36,000	4.15 USD	$149.4K	conv 34ClusterFirst in 12mo	SEC
Nexalin Technology, Inc.Listing on record	Sep 20, 2022	BuyD (derivative)	100,000	0.40 USD	$40K	ClusterFirst in 12mo	SEC
MILESTONE SCIENTIFIC INC.Listing on record	Jun 15, 2022	Award	30,488	0.82 USD	$25K		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Apr 20, 2022	Sell	-9,842	1.12 USD	$11K		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Apr 13, 2022	Sell	-8,500	1.18 USD	$10K		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Apr 13, 2022	Sell	-8,200	1.21 USD	$9.9K		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Apr 4, 2022	Sell	-6,000	1.51 USD	$9.1K	Unusual size	SEC
MILESTONE SCIENTIFIC INC.Listing on record	Apr 4, 2022	Sell	-14,100	1.42 USD	$20K	Unusual size	SEC
MILESTONE SCIENTIFIC INC.Listing on record	Mar 29, 2022	Sell	-7,110	1.33 USD	$9.5K	Unusual size	SEC
MILESTONE SCIENTIFIC INC.Listing on record	Mar 22, 2022	Sell	-7,600	1.30 USD	$9.9K		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Mar 22, 2022	Sell	-8,000	1.26 USD	$10.1K		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Mar 15, 2022	Sell	-8,500	1.18 USD	$10K		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Mar 15, 2022	Sell	-8,100	1.23 USD	$10K		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Mar 8, 2022	Sell	-7,500	1.35 USD	$10.1K		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Mar 8, 2022	Sell	-6,400	1.53 USD	$9.8K		SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
Nexalin Technology, Inc.Listing on record	Sep 30, 2025	Award	83,333	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Nexalin Technology, Inc.Listing on record	Sep 12, 2025	SellD (derivative)	-23,150	0.02 USD	$463		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Oct 23, 2024	Sell	-107,984	0.93 USD	$100.4K	Unusual size	SEC
Nexalin Technology, Inc.Listing on record	Sep 25, 2024	Award	700,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Aug 30, 2024	Award	112,356	0.89 USD	$100K		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Aug 21, 2024	Sell	-141,913	0.95 USD	$134.8K	Unusual size	SEC
Nexalin Technology, Inc.Listing on record	Oct 5, 2023	BuyD (derivative)	9,500	0.40 USD	$3.8K	Cluster	SEC
MILESTONE SCIENTIFIC INC.Listing on record	Aug 10, 2023	Award	112,360	0.89 USD	$100K		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Oct 11, 2022	Award	121,951	0.82 USD	$100K		SEC
Nexalin Technology, Inc.Listing on record	Sep 29, 2022	Buy	9,500	1.12 USD	$10.6K	conv 23Cluster	SEC
Nexalin Technology, Inc.Listing on record	Sep 20, 2022	Buy	36,000	4.15 USD	$149.4K	conv 34ClusterFirst in 12mo	SEC
Nexalin Technology, Inc.Listing on record	Sep 20, 2022	BuyD (derivative)	100,000	0.40 USD	$40K	ClusterFirst in 12mo	SEC
MILESTONE SCIENTIFIC INC.Listing on record	Jun 15, 2022	Award	30,488	0.82 USD	$25K		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Apr 20, 2022	Sell	-9,842	1.12 USD	$11K		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Apr 13, 2022	Sell	-8,500	1.18 USD	$10K		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Apr 13, 2022	Sell	-8,200	1.21 USD	$9.9K		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Apr 4, 2022	Sell	-6,000	1.51 USD	$9.1K	Unusual size	SEC
MILESTONE SCIENTIFIC INC.Listing on record	Apr 4, 2022	Sell	-14,100	1.42 USD	$20K	Unusual size	SEC
MILESTONE SCIENTIFIC INC.Listing on record	Mar 29, 2022	Sell	-7,110	1.33 USD	$9.5K	Unusual size	SEC
MILESTONE SCIENTIFIC INC.Listing on record	Mar 22, 2022	Sell	-7,600	1.30 USD	$9.9K		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Mar 22, 2022	Sell	-8,000	1.26 USD	$10.1K		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Mar 15, 2022	Sell	-8,500	1.18 USD	$10K		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Mar 15, 2022	Sell	-8,100	1.23 USD	$10K		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Mar 8, 2022	Sell	-7,500	1.35 USD	$10.1K		SEC
MILESTONE SCIENTIFIC INC.Listing on record	Mar 8, 2022	Sell	-6,400	1.53 USD	$9.8K		SEC