Prospector Partners LLC

SEC CIK: 0001080380
Latest filing: Feb 13, 2026

SEC filings (opens in a new tab)

MRK holding history

Merck & Co., Inc. in every 13F filed by Prospector Partners LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

MRK overview All 13F holders of MRK Full Q4 2025 holdings

Shares (Q4 2025): 0; Sold out in Q4 2025
Value: $0
% of portfolio: 0.0%
Quarters held: 19; Since Q1 2021

Holdings of MRK by Prospector Partners LLC, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q4 2025	0	$0	0.0%	−157,282−100.0%	Sold out	Holders
Q3 2025	157,282	$13.2M	1.6%	−9,521−5.7%	Reduced	Holders
Q2 2025	166,803	$13.2M	1.5%	−10,499−5.9%	Reduced	Holders
Q1 2025	177,302	$15.9M	1.8%	−1,036−0.6%	Reduced	Holders
Q4 2024	178,338	$17.7M	2.0%	+15,490+9.5%	Added	Holders
Q3 2024	162,848	$18.5M	2.0%	+737+0.5%	Added	Holders
Q2 2024	162,111	$20.1M	2.4%	+1,064+0.7%	Added	Holders
Q1 2024	161,047	$21.3M	2.5%	+2,860+1.8%	Added	Holders
Q4 2023	158,187	$17.2M	2.2%	+610+0.4%	Added	Holders
Q3 2023	157,577	$16.2M	2.3%	+515+0.3%	Added	Holders
Q2 2023	157,062	$18.1M	2.5%	−2,875−1.8%	Reduced	Holders
Q1 2023	159,937	$17.0M	2.5%	−17,365−9.8%	Reduced	Holders
Q4 2022	177,302	$19.7M	2.7%	−17,486−9.0%	Reduced	Holders
Q3 2022	194,788	$16.8M	2.6%	−5,420−2.7%	Reduced	Holders
Q2 2022	200,208	$18.3M	2.7%	−10,000−4.8%	Reduced	Holders
Q1 2022	210,208	$17.2M	2.1%	−13,500−6.0%	Reduced	Holders
Q4 2021	223,708	$17.1M	2.0%	−3,400−1.5%	Reduced	Holders
Q3 2021	227,108	$17.1M	2.2%	+1,560+0.7%	Added	Holders
Q2 2021	225,548	$17.5M	2.2%	−4,250−1.8%	Reduced	Holders
Q1 2021	229,798	$17.7M	2.3%	–	–	Holders

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.