YMAB

Y-mAbs Therapeutics, Inc.

Insider trading activity for Y-mAbs Therapeutics, Inc., straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Past 6 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Past 12 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Transaction history

The 100 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Sep 16, 2025	Wilms Joris	SVP & Chief Operating…	DTOISS◆	42,900	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Wilms Joris	SVP & Chief Operating…	DTOISS◆	35,700	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Wilms Joris	SVP & Chief Operating…	DTOISS◆	32,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Wilms Joris	SVP & Chief Operating…	DTOISS◆	35,700	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Wilms Joris	SVP & Chief Operating…	DTOISS◆	20,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Wilms Joris	SVP & Chief Operating…	DTOISS◆	32,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Wilms Joris	SVP & Chief Operating…	DTOISS◆	20,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Wilms Joris	SVP & Chief Operating…	DTOISS◆	20,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Wilms Joris	SVP & Chief Operating…	DTOISS◆	20,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Wilms Joris	SVP & Chief Operating…	DTOISS◆	20,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Wilms Joris	SVP & Chief Operating…	DTOISS◆	20,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Wilms Joris	SVP & Chief Operating…	DTOISS	39,301	—	—	-100.0%	Open the original filing on SEC.gov
Sep 16, 2025	Wilms Joris	SVP & Chief Operating…	UTENDR	12,799	$8.60	$110.1K	-100.0%	Open the original filing on SEC.gov
Sep 16, 2025	Wedell-Wedellsborg Johan	Director, 10% Owner	DTOISS◆	33,450	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Wedell-Wedellsborg Johan	Director, 10% Owner	DTOISS◆	14,545	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Wedell-Wedellsborg Johan	Director, 10% Owner	DTOISS◆	13,950	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Wedell-Wedellsborg Johan	Director, 10% Owner	DTOISS◆	16,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Wedell-Wedellsborg Johan	Director, 10% Owner	DTOISS◆	11,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Wedell-Wedellsborg Johan	Director, 10% Owner	DTOISS◆	11,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Wedell-Wedellsborg Johan	Director, 10% Owner	DTOISS◆	16,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Wedell-Wedellsborg Johan	Director, 10% Owner	DTOISS◆	32,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Wedell-Wedellsborg Johan	Director, 10% Owner	DTOISS◆	36,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Wedell-Wedellsborg Johan	Director, 10% Owner	UTENDR	4.6M	$8.60	$39.2M	-100.0%	Open the original filing on SEC.gov
Sep 16, 2025	Wedell-Wedellsborg Johan	Director, 10% Owner	DTOISS	25,080	—	—	-100.0%	Open the original filing on SEC.gov
Sep 16, 2025	Wedell-Wedellsborg Johan	Director, 10% Owner	UTENDR	5,825	$8.60	$50.1K	-100.0%	Open the original filing on SEC.gov
Sep 16, 2025	WG Biotech ApS	Director, 10% Owner	UTENDR	4.6M	$8.60	$39.2M	-100.0%	Open the original filing on SEC.gov
Sep 16, 2025	Tyagi Ashu	Director	DTOISS◆	33,450	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Tyagi Ashu	Director	DTOISS◆	14,545	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Tyagi Ashu	Director	DTOISS◆	13,950	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Tyagi Ashu	Director	DTOISS◆	16,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Tyagi Ashu	Director	DTOISS◆	11,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Tyagi Ashu	Director	DTOISS◆	11,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Tyagi Ashu	Director	DTOISS◆	32,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Tyagi Ashu	Director	DTOISS◆	16,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Tyagi Ashu	Director	DTOISS	25,080	—	—	-100.0%	Open the original filing on SEC.gov
Sep 16, 2025	Tyagi Ashu	Director	UTENDR	5,825	$8.60	$50.1K	-100.0%	Open the original filing on SEC.gov
Sep 16, 2025	Rossi Michael J	President & CEO	DTOISS◆	52,650	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Rossi Michael J	President & CEO	DTOISS◆	52,650	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Rossi Michael J	President & CEO	DTOISS◆	18,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Rossi Michael J	President & CEO	DTOISS◆	18,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Rossi Michael J	President & CEO	DTOISS◆	18,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Rossi Michael J	President & CEO	DTOISS◆	210,700	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Rossi Michael J	President & CEO	DTOISS◆	214,200	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Rossi Michael J	President & CEO	DTOISS◆	615,240	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Rossi Michael J	President & CEO	DTOISS	129,101	—	—	-100.0%	Open the original filing on SEC.gov
Sep 16, 2025	Rossi Michael J	President & CEO	UTENDR	7,982	$8.60	$68.6K	-100.0%	Open the original filing on SEC.gov
Sep 16, 2025	Pfreundschuh Peter P.	EVP, CFO and Treasurer	DTOISS◆	15,900	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Pfreundschuh Peter P.	EVP, CFO and Treasurer	DTOISS◆	15,900	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Pfreundschuh Peter P.	EVP, CFO and Treasurer	DTOISS◆	63,500	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Pfreundschuh Peter P.	EVP, CFO and Treasurer	DTOISS◆	170,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Pfreundschuh Peter P.	EVP, CFO and Treasurer	DTOISS	77,800	—	—	-100.0%	Open the original filing on SEC.gov
Sep 16, 2025	LaRocca John	SVP, General Counsel &…	DTOISS◆	42,900	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	LaRocca John	SVP, General Counsel &…	DTOISS◆	142,600	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	LaRocca John	SVP, General Counsel &…	DTOISS	21,500	—	—	-100.0%	Open the original filing on SEC.gov
Sep 16, 2025	Healy James	Director	DTOISS◆	33,450	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Healy James	Director	DTOISS◆	14,545	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Healy James	Director	DTOISS◆	13,950	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Healy James	Director	DTOISS◆	16,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Healy James	Director	DTOISS◆	11,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Healy James	Director	DTOISS◆	11,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Healy James	Director	DTOISS◆	8,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Healy James	Director	DTOISS◆	14,222	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Healy James	Director	UTENDR	2.2M	$8.60	$18.9M	-100.0%	Open the original filing on SEC.gov
Sep 16, 2025	Healy James	Director	DTOISS	25,080	—	—	-100.0%	Open the original filing on SEC.gov
Sep 16, 2025	Healy James	Director	UTENDR	31,603	$8.60	$271.8K	-100.0%	Open the original filing on SEC.gov
Sep 16, 2025	Gentilcore Douglas J	SVP, Danyelza Bus. Unit…	DTOISS◆	142,600	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gad Thomas	Chief Business Officer	DTOISS◆	16,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gad Thomas	Chief Business Officer	DTOISS◆	16,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gad Thomas	Chief Business Officer	DTOISS◆	64,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gad Thomas	Chief Business Officer	DTOISS◆	132,500	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gad Thomas	Chief Business Officer	DTOISS◆	75,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gad Thomas	Chief Business Officer	DTOISS◆	242,200	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gad Thomas	Chief Business Officer	DTOISS◆	60,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gad Thomas	Chief Business Officer	DTOISS◆	110,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gad Thomas	Chief Business Officer	DTOISS◆	91,450	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gad Thomas	Chief Business Officer	DTOISS◆	130,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gad Thomas	Chief Business Officer	DTOISS◆	107,500	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gad Thomas	Chief Business Officer	DTOISS◆	100,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gad Thomas	Chief Business Officer	DTOISS◆	16,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gad Thomas	Chief Business Officer	DTOISS◆	143,169	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gad Thomas	Chief Business Officer	UTENDR	60,000	$8.60	$516K	-100.0%	Open the original filing on SEC.gov
Sep 16, 2025	Gad Thomas	Chief Business Officer	UTENDR	67,681	$8.60	$582.1K	-100.0%	Open the original filing on SEC.gov
Sep 16, 2025	Gad Thomas	Chief Business Officer	DTOISS	60,235	—	—	-100.0%	Open the original filing on SEC.gov
Sep 16, 2025	Gad Thomas	Chief Business Officer	UTENDR	245,486	$8.60	$2.1M	-100.0%	Open the original filing on SEC.gov
Sep 16, 2025	Gill David N	Director	DTOISS◆	33,450	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gill David N	Director	DTOISS◆	14,545	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gill David N	Director	DTOISS◆	13,950	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gill David N	Director	DTOISS◆	16,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gill David N	Director	DTOISS◆	11,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gill David N	Director	DTOISS◆	11,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gill David N	Director	DTOISS◆	16,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gill David N	Director	DTOISS◆	24,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Gill David N	Director	DTOISS	25,080	—	—	-100.0%	Open the original filing on SEC.gov
Sep 16, 2025	Gill David N	Director	DTOISS	5,825	$8.60	$50.1K	-100.0%	Open the original filing on SEC.gov
Sep 16, 2025	Hamill Laura	Director	DTOISS◆	33,450	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Hamill Laura	Director	DTOISS◆	14,545	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Hamill Laura	Director	DTOISS◆	13,950	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Hamill Laura	Director	DTOISS◆	16,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Hamill Laura	Director	DTOISS◆	11,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Hamill Laura	Director	DTOISS◆	27,000	—	—	—	Open the original filing on SEC.gov

DTOISS◆—

Wilms Joris · SVP & Chief…Sep 16, 2025

42,900 sh

DTOISS◆—

Wilms Joris · SVP & Chief…Sep 16, 2025

35,700 sh

DTOISS◆—

Wilms Joris · SVP & Chief…Sep 16, 2025

32,000 sh

DTOISS◆—

Wilms Joris · SVP & Chief…Sep 16, 2025

35,700 sh

DTOISS◆—

Wilms Joris · SVP & Chief…Sep 16, 2025

20,000 sh

DTOISS◆—

Wilms Joris · SVP & Chief…Sep 16, 2025

32,000 sh

DTOISS◆—

Wilms Joris · SVP & Chief…Sep 16, 2025

20,000 sh

DTOISS◆—

Wilms Joris · SVP & Chief…Sep 16, 2025

20,000 sh

DTOISS◆—

Wilms Joris · SVP & Chief…Sep 16, 2025

20,000 sh

DTOISS◆—

Wilms Joris · SVP & Chief…Sep 16, 2025

20,000 sh

DTOISS◆—

Wilms Joris · SVP & Chief…Sep 16, 2025

20,000 sh

DTOISS—

Wilms Joris · SVP & Chief…Sep 16, 2025

39,301 sh · -100.0% own

UTENDR$110.1K

Wilms Joris · SVP & Chief…Sep 16, 2025

12,799 sh @ $8.60 · -100.0% own

DTOISS◆—

Wedell-Wedellsborg Johan · Director, 10%…Sep 16, 2025

33,450 sh

DTOISS◆—

Wedell-Wedellsborg Johan · Director, 10%…Sep 16, 2025

14,545 sh

DTOISS◆—

Wedell-Wedellsborg Johan · Director, 10%…Sep 16, 2025

13,950 sh

DTOISS◆—

Wedell-Wedellsborg Johan · Director, 10%…Sep 16, 2025

16,000 sh

DTOISS◆—

Wedell-Wedellsborg Johan · Director, 10%…Sep 16, 2025

11,000 sh

DTOISS◆—

Wedell-Wedellsborg Johan · Director, 10%…Sep 16, 2025

11,000 sh

DTOISS◆—

Wedell-Wedellsborg Johan · Director, 10%…Sep 16, 2025

16,000 sh

DTOISS◆—

Wedell-Wedellsborg Johan · Director, 10%…Sep 16, 2025

32,000 sh

DTOISS◆—

Wedell-Wedellsborg Johan · Director, 10%…Sep 16, 2025

36,000 sh

UTENDR$39.2M

Wedell-Wedellsborg Johan · Director, 10%…Sep 16, 2025

4.6M sh @ $8.60 · -100.0% own

DTOISS—

Wedell-Wedellsborg Johan · Director, 10%…Sep 16, 2025

25,080 sh · -100.0% own

UTENDR$50.1K

Wedell-Wedellsborg Johan · Director, 10%…Sep 16, 2025

5,825 sh @ $8.60 · -100.0% own

UTENDR$39.2M

WG Biotech ApS · Director, 10%…Sep 16, 2025

4.6M sh @ $8.60 · -100.0% own

DTOISS◆—

Tyagi Ashu · DirectorSep 16, 2025

33,450 sh

DTOISS◆—

Tyagi Ashu · DirectorSep 16, 2025

14,545 sh

DTOISS◆—

Tyagi Ashu · DirectorSep 16, 2025

13,950 sh

DTOISS◆—

Tyagi Ashu · DirectorSep 16, 2025

16,000 sh

DTOISS◆—

Tyagi Ashu · DirectorSep 16, 2025

11,000 sh

DTOISS◆—

Tyagi Ashu · DirectorSep 16, 2025

11,000 sh

DTOISS◆—

Tyagi Ashu · DirectorSep 16, 2025

32,000 sh

DTOISS◆—

Tyagi Ashu · DirectorSep 16, 2025

16,000 sh

DTOISS—

Tyagi Ashu · DirectorSep 16, 2025

25,080 sh · -100.0% own

UTENDR$50.1K

Tyagi Ashu · DirectorSep 16, 2025

5,825 sh @ $8.60 · -100.0% own

DTOISS◆—

Rossi Michael J · President & CEOSep 16, 2025

52,650 sh

DTOISS◆—

Rossi Michael J · President & CEOSep 16, 2025

52,650 sh

DTOISS◆—

Rossi Michael J · President & CEOSep 16, 2025

18,000 sh

DTOISS◆—

Rossi Michael J · President & CEOSep 16, 2025

18,000 sh

DTOISS◆—

Rossi Michael J · President & CEOSep 16, 2025

18,000 sh

DTOISS◆—

Rossi Michael J · President & CEOSep 16, 2025

210,700 sh

DTOISS◆—

Rossi Michael J · President & CEOSep 16, 2025

214,200 sh

DTOISS◆—

Rossi Michael J · President & CEOSep 16, 2025

615,240 sh

DTOISS—

Rossi Michael J · President & CEOSep 16, 2025

129,101 sh · -100.0% own

UTENDR$68.6K

Rossi Michael J · President & CEOSep 16, 2025

7,982 sh @ $8.60 · -100.0% own

DTOISS◆—

Pfreundschuh Peter P. · EVP, CFO and…Sep 16, 2025

15,900 sh

DTOISS◆—

Pfreundschuh Peter P. · EVP, CFO and…Sep 16, 2025

15,900 sh

DTOISS◆—

Pfreundschuh Peter P. · EVP, CFO and…Sep 16, 2025

63,500 sh

DTOISS◆—

Pfreundschuh Peter P. · EVP, CFO and…Sep 16, 2025

170,000 sh

DTOISS—

Pfreundschuh Peter P. · EVP, CFO and…Sep 16, 2025

77,800 sh · -100.0% own

DTOISS◆—

LaRocca John · SVP, General…Sep 16, 2025

42,900 sh

DTOISS◆—

LaRocca John · SVP, General…Sep 16, 2025

142,600 sh

DTOISS—

LaRocca John · SVP, General…Sep 16, 2025

21,500 sh · -100.0% own

DTOISS◆—

Healy James · DirectorSep 16, 2025

33,450 sh

DTOISS◆—

Healy James · DirectorSep 16, 2025

14,545 sh

DTOISS◆—

Healy James · DirectorSep 16, 2025

13,950 sh

DTOISS◆—

Healy James · DirectorSep 16, 2025

16,000 sh

DTOISS◆—

Healy James · DirectorSep 16, 2025

11,000 sh

DTOISS◆—

Healy James · DirectorSep 16, 2025

11,000 sh

DTOISS◆—

Healy James · DirectorSep 16, 2025

8,000 sh

DTOISS◆—

Healy James · DirectorSep 16, 2025

14,222 sh

UTENDR$18.9M

Healy James · DirectorSep 16, 2025

2.2M sh @ $8.60 · -100.0% own

DTOISS—

Healy James · DirectorSep 16, 2025

25,080 sh · -100.0% own

UTENDR$271.8K

Healy James · DirectorSep 16, 2025

31,603 sh @ $8.60 · -100.0% own

DTOISS◆—

Gentilcore Douglas J · SVP, Danyelza…Sep 16, 2025

142,600 sh

DTOISS◆—