Lantheus Holdings LNTH Insider Ownership

NASDAQ LNTH
$100.96 +0.52 (+0.52%)
As of: Sep 9, 2026 · 1:45 PM EDT

Insider Holdings by Owner

8.50Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
7.22%
+0.019% pp QoQ
Shares Held by Insiders
4.88Mn
filed for Sep 2026
+0.26% QoQ
Shares Outstanding
67.66Mn
67,663,000 shares
Direct Holdings
1.35Mn
Indirect: 3.53Mn
Net Shares Traded (QoQ)
+12.54K
net buying in Sep 2026
Insiders Holding Shares
25
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest
Average ownership
Peak ownership

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter
Net over range
Buying quarters

Insider Ownership Summary

Quarter ending 30 Sep, 2026

As of September 09, 2026, the three largest insider holders of LNTH are Rajiv A Patel (Other, 3.48Mn shares), Rajiv A Patel (Other, 3.48Mn shares), Partners L L C/Ca Farallon (TenPercentOwner, 3.48Mn shares).

Form 4 Holdings

Insiders Holding LNTH

Insiders 25
Shares held 8.50Mn
Of outstanding 12.56%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Partners L L C/Ca Farallon TenPercentOwner, Other 0 3,477,227 3,477,227 40.9% 21 Aug, 2025
2 Rajiv A Patel Other 0 3,477,227 3,477,227 40.9% 21 Aug, 2025
3 Mary Anne Heino Executive Chair And Ceo 321,897 0 321,897 3.8% 03 Jun, 2026
4 Brian A Markison Ceo 232,420 0 232,420 2.7% 07 Mar, 2025
5 Robert J. Jr. Marshall Cfo And Treasurer 122,071 0 122,071 1.4% 02 Sep, 2026
6 Daniel Niedzwiecki Officer 117,465 0 117,465 1.4% 21 Apr, 2026
7 Paul Blanchfield President 108,214 0 108,214 1.3% 15 Aug, 2025
8 Etienne Montagut Chief Business Officer 94,651 0 94,651 1.1% 07 Mar, 2024
9 Sam R Leno Director 67,246 0 67,246 0.8% 18 May, 2026
10 Carol Walker Senior Vice President, Quality 64,899 0 64,899 0.8% 01 Apr, 2022
11 Amanda Michelle Morgan Chief Commercial Officer 64,153 0 64,153 0.8% 09 Mar, 2026
12 Andrea Sabens Chief Accounting Officer 60,420 0 60,420 0.7% 17 Jul, 2024
13 James H Thrall Director 39,881 0 39,881 0.5% 18 May, 2026
14 Jean-Claude Provost Chief Medical Officer 0 38,841 38,841 0.5% 07 Mar, 2024
15 Ludger Dinkelborg Officer 33,195 0 33,195 0.4% 19 Aug, 2026
16 Ying Vivian Yao Chief Human Resources Officer 30,319 0 30,319 0.4% 07 Mar, 2022
17 Julie Mchugh Director 30,099 0 30,099 0.4% 18 May, 2026
18 Heinz Christoph Maeusli Director 30,014 0 30,014 0.4% 18 May, 2026
19 Gerard Ber Director 27,118 0 27,118 0.3% 03 Jun, 2026
20 Minnie Baylor-Henry Director 14,018 0 14,018 0.2% 18 May, 2026
21 Kimberly Brown Chief Accounting Officer 13,263 0 13,263 0.2% 19 Aug, 2026
22 Jeffrey Humphrey Chief Medical Officer 9,076 0 9,076 0.1% 20 Jun, 2024
23 Julia Marie Eastland Director 8,019 0 8,019 0.1% 18 May, 2026
24 Phuong Khanh Morrow Director 7,237 0 7,237 0.1% 18 May, 2026
25 Gary J Pruden Director 6,674 0 6,674 0.1% 18 May, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

2,031 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
17 Aug, 2026 Ludger Dinkelborg Officer Disposed F 2,536 $100.91 $255.91K 33,195 Direct
17 Aug, 2026 Kimberly Brown Chief Accounting Officer Disposed F 463 $100.91 $46.72K 13,263 Direct
14 May, 2026 Gerard Ber Director Disposed F 381 $96.67 $36.83K 27,118 Direct
14 May, 2026 Mary Anne Heino Executive Chair And Ceo Disposed F 1,227 $96.67 $118.61K 321,897 Direct
14 May, 2026 Heinz Christoph Maeusli Director Acquired A 4,137 $0.00 $0 30,014 Direct
14 May, 2026 Gary J Pruden Director Acquired A 4,137 $0.00 $0 6,674 Direct
14 May, 2026 Minnie Baylor-Henry Director Acquired A 4,137 $0.00 $0 14,018 Direct
14 May, 2026 Phuong Khanh Morrow Director Acquired A 4,137 $0.00 $0 7,237 Direct
14 May, 2026 James H Thrall Director Acquired A 4,137 $0.00 $0 39,881 Direct
14 May, 2026 Sam R Leno Director Acquired A 4,137 $0.00 $0 67,246 Direct
14 May, 2026 Gerard Ber Director Acquired A 4,137 $0.00 $0 27,499 Direct
14 May, 2026 Julia Marie Eastland Director Acquired A 4,137 $0.00 $0 8,019 Direct
14 May, 2026 Julie Mchugh Director Acquired A 4,137 $0.00 $0 30,099 Direct
17 Apr, 2026 Daniel Niedzwiecki Officer Disposed F 1,911 $83.82 $160.18K 117,465 Direct
05 Mar, 2026 Amanda Michelle Morgan Chief Commercial Officer Acquired A 26,208 $0.00 $0 64,748 Direct
05 Mar, 2026 Robert J. Jr. Marshall Cfo And Treasurer Acquired A 38,002 $0.00 $0 123,974 Direct
05 Mar, 2026 Robert J. Jr. Marshall Cfo And Treasurer Acquired A 38,002 $0.00 $0 123,974 Direct
05 Mar, 2026 Robert J. Jr. Marshall Cfo And Treasurer Acquired A 38,002 $0.00 $0 123,974 Direct
05 Mar, 2026 Amanda Michelle Morgan Chief Commercial Officer Acquired A 26,208 $0.00 $0 64,748 Direct
05 Mar, 2026 Amanda Michelle Morgan Chief Commercial Officer Acquired A 26,208 $0.00 $0 64,748 Direct