Gerard Ber

CIK 1762144 · last filed 2026-06-03

Gerard Ber is a corporate insider who has filed 27 SEC Form 4 insider transactions across 3 companies since 2019. The most recent filing shows the insider had shares withheld for taxes covering $36.8K of LNTH on Jun 3, 2026. Across all open-market trades the lifetime net is −$1.6M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $2.7M across reported positions. 17 SEC filings were submitted jointly with Lantheus Holdings, Inc.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

Disclosed Exposure

$2.72M

Companies

3

Total Filings

27

Lifetime Open-Market Net

-$1.58M

Filer Profile

Reported Address

C/O Y-MABS THERAPEUTICS, INC.
230 PARK AVENUE, 33RD FLOOR
NEW YORK, NY 10169

Related Filers

Lantheus Holdings, Inc. — 17 joint filings, latest 2026-06-03

Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.

Symbol	Role	Shares	Price	Disclosed Exposure	Lifetime OM Net	Filings	Latest Filed
LNTH	Director	27,118	$100.25	$2.72M	-$1.57M	15	2026-06-03
Y-mAbs Therapeutics, Inc. (YMAB) Delisted	Director	1,608	$8.61	$13.8K	-$8.7K	6	2024-06-11
PROGENICS PHARMACEUTICALS INC (PGNX) Delisted	Director	—	—	—	$0	2	2019-12-17

Recent Filings

27 filings

Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.

Filed	Symbol	Action	Net Shares	Net $	Link
2026-06-03	LNTH	Tax (F)	−381	-$36.8K	EDGAR
2026-05-18	LNTH	Grant (A)	+4,137	$0	EDGAR
2025-05-16	LNTH	Grant (A)	+2,537	$0	EDGAR
2025-05-13	LNTH	Tax (F)	−396	-$32.4K	EDGAR
2024-09-03	Y-mAbs Therapeutics, Inc. (YMAB) Delisted	Notice (144)	−13,950	-$192.9K	EDGAR
2024-08-14	LNTH	Sell (S)	−15,500	-$1.50M	EDGAR
2024-08-12	LNTH	Notice (144)	−15,500	-$1.51M	EDGAR
2024-06-11	Y-mAbs Therapeutics, Inc. (YMAB) Delisted	Sell (S)	−722	-$8.7K	EDGAR
2024-06-10	Y-mAbs Therapeutics, Inc. (YMAB) Delisted	Notice (144)	−722	-$8.7K	EDGAR
2024-05-15	LNTH	Tax (F)	−629	-$54.5K	EDGAR

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Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.