Prospector Partners LLC

SEC CIK: 0001080380
Latest filing: Feb 13, 2026

SEC filings (opens in a new tab)

AJG holding history

Arthur J. Gallagher & Co. 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.

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

Shares (Q4 2025): 3,120
Value: $807.4K
% of portfolio: 1.7%
Quarters held: 20; Since Q1 2021

Holdings of AJG by Prospector Partners LLC, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q4 2025	3,120	$807.4K	1.7%	−41,844−93.1%	Reduced	Holders
Q3 2025	44,964	$13.9M	1.7%	−32,699−42.1%	Reduced	Holders
Q2 2025	77,663	$24.9M	2.9%	−3,089−3.8%	Reduced	Holders
Q1 2025	80,752	$27.9M	3.2%	−387−0.5%	Reduced	Holders
Q4 2024	81,139	$23.0M	2.6%	+175+0.2%	Added	Holders
Q3 2024	80,964	$22.8M	2.4%	+257+0.3%	Added	Holders
Q2 2024	80,707	$20.9M	2.5%	+443+0.6%	Added	Holders
Q1 2024	80,264	$20.1M	2.3%	−20,290−20.2%	Reduced	Holders
Q4 2023	100,554	$22.6M	2.8%	+280+0.3%	Added	Holders
Q3 2023	100,274	$22.9M	3.2%	+375+0.4%	Added	Holders
Q2 2023	99,899	$21.9M	3.1%	+550+0.6%	Added	Holders
Q1 2023	99,349	$19.0M	2.8%	−12,024−10.8%	Reduced	Holders
Q4 2022	111,373	$21.0M	2.9%	+348+0.3%	Added	Holders
Q3 2022	111,025	$19.0M	2.9%	+9,175+9.0%	Added	Holders
Q2 2022	101,850	$16.6M	2.4%	−3,795−3.6%	Reduced	Holders
Q1 2022	105,645	$18.4M	2.3%	−9,780−8.5%	Reduced	Holders
Q4 2021	115,425	$19.6M	2.3%	−10,375−8.2%	Reduced	Holders
Q3 2021	125,800	$18.7M	2.4%	−2,000−1.6%	Reduced	Holders
Q2 2021	127,800	$17.9M	2.3%	+1,000+0.8%	Added	Holders
Q1 2021	126,800	$15.8M	2.0%	–	–	Holders

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