MOULDER LEON O JR

Director at Dianthus Therapeutics, Inc. /DE/ · on record since Sep 13, 2023
Director at MGI PHARMA INC · on record since Jul 17, 2006
President & CEO at MGI PHARMA INC · on record since Jul 17, 2006
See Remarks at Zenas BioPharma, Inc. · on record since Jun 12, 2025
Director at Abraxis BioScience, Inc. · on record since May 1, 2009
President & CEO at Abraxis BioScience, Inc. · on record since May 1, 2009
Director at CUBIST PHARMACEUTICALS INC · on record since Feb 22, 2010
Director at TESARO, Inc. · on record since Jun 27, 2012
Director at Zenas BioPharma, Inc. · on record since Apr 29, 2026
Director at TREVENA INC · on record since Jan 30, 2014
Chief Executive Officer at TESARO, Inc. · on record since Mar 3, 2016
Director at Zai Lab Ltd · on record since Jan 20, 2021

Insider trading activity of MOULDER LEON O JR

Transactions on record: 167; since May 12, 2004

Open-market buys: 34; $8.9M

Open-market sells: 0

Companies traded: 8; last filing Jun 22, 2026

Figures computed from official regulatory filings — .

Companies where MOULDER LEON O JR has traded

Zai Lab Ltd6 tx · $500K · Jun 22, 2026
Zenas BioPharma, Inc.39 tx · $7.9M · Jun 17, 2026
Dianthus Therapeutics, Inc. /DE/3 tx · $2M · May 28, 2024
TREVENA INC13 tx · $302K · Jun 20, 2023
38 tx · $78.4M · Jan 22, 2019
27 tx · $1.7M · Jan 21, 2015
2 tx · $9.5M · May 1, 2009
39 tx · $77.6M · Jan 30, 2008

Track record of MOULDER LEON O JR

Statistical track record

Free account

Open-market buys: 34

Last buy: May 18, 2026

Win rates, median returns and the proven-insider analysis come with a free account.

Transaction history of MOULDER LEON O JR

Co-insiders of MOULDER LEON O JR

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
Zai Lab LtdListing on record	Jun 22, 2026	Award	22,371	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Zenas BioPharma, Inc.Listing unverified	Jun 17, 2026	AwardD (derivative)	500,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Zenas BioPharma, Inc.Listing unverified	May 18, 2026	Buy	60,000	16.88 USD	$1M	conv 75ClusterUnusual size	SEC
Zenas BioPharma, Inc.Listing unverified	Apr 29, 2026	Buy	35,000	17.62 USD	$616.7K	conv 44Cluster	SEC
Zenas BioPharma, Inc.Listing unverified	Apr 29, 2026	Buy	25,000	18.02 USD	$450.5K	conv 41Cluster	SEC
Zenas BioPharma, Inc.Listing unverified	Mar 31, 2026	Buy	20,000	18.23 USD	$364.6K	conv 41Cluster	SEC
Zenas BioPharma, Inc.Listing unverified	Mar 31, 2026	Buy	34,000	19.31 USD	$656.5K	conv 46Cluster	SEC
Zenas BioPharma, Inc.Listing unverified	Feb 3, 2026	Buy	57,000	17.96 USD	$1M	conv 56Unusual size	SEC
Zenas BioPharma, Inc.Listing unverified	Jan 9, 2026	Buy	20,000	16.55 USD	$331K	conv 30	SEC
Zenas BioPharma, Inc.Listing unverified	Jan 9, 2026	Buy	50,000	16.38 USD	$819K	conv 60Unusual size	SEC
Zenas BioPharma, Inc.Listing unverified	Jan 9, 2026	Buy	30,000	16.30 USD	$489K	conv 39	SEC
Zenas BioPharma, Inc.Listing unverified	Oct 9, 2025	Buy	36,928	20.85 USD	$769.9K	conv 79ClusterUnusual size	SEC
Zai Lab LtdListing on record	Jun 23, 2025	Award	10,831	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Zenas BioPharma, Inc.Listing unverified	Jun 12, 2025	AwardD (derivative)	400,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Zenas BioPharma, Inc.Listing unverified	Feb 19, 2025	Buy	25,000	6.67 USD	$166.8K	conv 35	SEC
Zenas BioPharma, Inc.Listing unverified	Dec 4, 2024	Buy	25,000	10.76 USD	$269K	conv 63ClusterUnusual size	SEC
Zenas BioPharma, Inc.Listing unverified	Dec 4, 2024	Buy	45,000	9.98 USD	$449.1K	conv 65ClusterUnusual size	SEC
Zenas BioPharma, Inc.Listing unverified	Nov 20, 2024	Buy	7,500	15.00 USD	$112.5K	conv 45Cluster	SEC
Zenas BioPharma, Inc.Listing unverified	Nov 20, 2024	Buy	2,500	14.57 USD	$36.4K	conv 37Cluster	SEC
Zenas BioPharma, Inc.Listing unverified	Sep 20, 2024	Buy	2,633	18.97 USD	$49.9K	conv 36Cluster	SEC
Zenas BioPharma, Inc.Listing unverified	Sep 20, 2024	Buy	5,000	17.89 USD	$89.5K	conv 39Cluster	SEC
Zenas BioPharma, Inc.Listing unverified	Sep 20, 2024	Buy	2,367	17.88 USD	$42.3K	conv 36Cluster	SEC
Zenas BioPharma, Inc.Listing unverified	Sep 20, 2024	Buy	10,000	17.91 USD	$179.1K	conv 59ClusterUnusual size+1	SEC
Zenas BioPharma, Inc.Listing unverified	Sep 17, 2024	Other	48,254	—	n/a (No price was disclosed in the filing)		SEC
Zenas BioPharma, Inc.Listing unverified	Sep 17, 2024	Other	108,381	—	n/a (No price was disclosed in the filing)		SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
Zai Lab LtdListing on record	Jun 22, 2026	Award	22,371	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Zenas BioPharma, Inc.Listing unverified	Jun 17, 2026	AwardD (derivative)	500,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Zenas BioPharma, Inc.Listing unverified	May 18, 2026	Buy	60,000	16.88 USD	$1M	conv 75ClusterUnusual size	SEC
Zenas BioPharma, Inc.Listing unverified	Apr 29, 2026	Buy	35,000	17.62 USD	$616.7K	conv 44Cluster	SEC
Zenas BioPharma, Inc.Listing unverified	Apr 29, 2026	Buy	25,000	18.02 USD	$450.5K	conv 41Cluster	SEC
Zenas BioPharma, Inc.Listing unverified	Mar 31, 2026	Buy	20,000	18.23 USD	$364.6K	conv 41Cluster	SEC
Zenas BioPharma, Inc.Listing unverified	Mar 31, 2026	Buy	34,000	19.31 USD	$656.5K	conv 46Cluster	SEC
Zenas BioPharma, Inc.Listing unverified	Feb 3, 2026	Buy	57,000	17.96 USD	$1M	conv 56Unusual size	SEC
Zenas BioPharma, Inc.Listing unverified	Jan 9, 2026	Buy	20,000	16.55 USD	$331K	conv 30	SEC
Zenas BioPharma, Inc.Listing unverified	Jan 9, 2026	Buy	50,000	16.38 USD	$819K	conv 60Unusual size	SEC
Zenas BioPharma, Inc.Listing unverified	Jan 9, 2026	Buy	30,000	16.30 USD	$489K	conv 39	SEC
Zenas BioPharma, Inc.Listing unverified	Oct 9, 2025	Buy	36,928	20.85 USD	$769.9K	conv 79ClusterUnusual size	SEC
Zai Lab LtdListing on record	Jun 23, 2025	Award	10,831	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Zenas BioPharma, Inc.Listing unverified	Jun 12, 2025	AwardD (derivative)	400,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Zenas BioPharma, Inc.Listing unverified	Feb 19, 2025	Buy	25,000	6.67 USD	$166.8K	conv 35	SEC
Zenas BioPharma, Inc.Listing unverified	Dec 4, 2024	Buy	25,000	10.76 USD	$269K	conv 63ClusterUnusual size	SEC
Zenas BioPharma, Inc.Listing unverified	Dec 4, 2024	Buy	45,000	9.98 USD	$449.1K	conv 65ClusterUnusual size	SEC
Zenas BioPharma, Inc.Listing unverified	Nov 20, 2024	Buy	7,500	15.00 USD	$112.5K	conv 45Cluster	SEC
Zenas BioPharma, Inc.Listing unverified	Nov 20, 2024	Buy	2,500	14.57 USD	$36.4K	conv 37Cluster	SEC
Zenas BioPharma, Inc.Listing unverified	Sep 20, 2024	Buy	2,633	18.97 USD	$49.9K	conv 36Cluster	SEC
Zenas BioPharma, Inc.Listing unverified	Sep 20, 2024	Buy	5,000	17.89 USD	$89.5K	conv 39Cluster	SEC
Zenas BioPharma, Inc.Listing unverified	Sep 20, 2024	Buy	2,367	17.88 USD	$42.3K	conv 36Cluster	SEC
Zenas BioPharma, Inc.Listing unverified	Sep 20, 2024	Buy	10,000	17.91 USD	$179.1K	conv 59ClusterUnusual size+1	SEC
Zenas BioPharma, Inc.Listing unverified	Sep 17, 2024	Other	48,254	—	n/a (No price was disclosed in the filing)		SEC
Zenas BioPharma, Inc.Listing unverified	Sep 17, 2024	Other	108,381	—	n/a (No price was disclosed in the filing)		SEC