Mariner’s Orion Office REIT ONL Stock Holding History

Mariner’s Portfolio ONL Stock Details ONL Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$129K	Sell	59,944 -71,875	-55%	-$166K	﹤0.01%	3276
2025 Q4	$298K	Sell	131,819 -96,570	-42%	-$228K	﹤0.01%	2852
2025 Q3	$617K	Sell	228,389 -227,999	-50%	-$610K	﹤0.01%	2263
2025 Q2	$972K	Buy	456,388 +359,954	+373%	+$686K	﹤0.01%	1808
2025 Q1	$206K	Sell	96,434 -168,180	-64%	-$587K	﹤0.01%	2981
2024 Q4	$982K	Buy	264,614 +148,223	+127%	+$583K	﹤0.01%	1660
2024 Q3	$466K	Buy	116,391 +5,060	+5%	+$19.8K	﹤0.01%	2187
2024 Q2	$400K	Buy	111,331 +19,060	+21%	+$65.3K	﹤0.01%	2227
2024 Q1	$324K	Buy	92,271 +54,128	+142%	+$243K	﹤0.01%	2371
2023 Q4	$218K	Buy	+38,143	New	+$199K	﹤0.01%	2622
2022 Q4	–	Sell	-11,209	Closed	-$98K	–	2808
2022 Q3	$98K	Buy	+11,209	New	+$115K	﹤0.01%	2210

Other funds holding ONL

PMG

Private Management Group Irvine, California $3.47B AUM 13.39% 1-Year Est. Return

JGC

J. Goldman & Co New York $3.44B AUM 33.8% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Parkwood LLC Cleveland, Ohio $1.13B AUM 32.89% 1-Year Est. Return

Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

RBF Capital San Francisco, California $2.05B AUM 29.64% 1-Year Est. Return

Rangeley Capital New Canaan, Connecticut $103M AUM 77.32% 1-Year Est. Return

Jane Street New York $777B AUM 61.18% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Mariner's ONL Position: Q1 2026 in Review

Mariner reduced its Orion Office REIT (ONL) stake by 55% in Q1 2026, selling an estimated $166K and leaving 59,944 shares worth $129K. The position accounts for ﹤0.01% of the portfolio, ranked #3276.

Mariner first reported a position in ONL in Q3 2022 and has held it in 11 quarters since. The position peaked at $982K in Q4 2024. 191 funds tracked by Wall St. Rank hold ONL as of Q1 2026.

Mariner held 59,944 shares of Orion Office REIT worth $129K as of Q1 2026.
Mariner sold 71,875 Orion Office REIT shares in Q1 2026, an estimated $166K.
Orion Office REIT made up ﹤0.01% of Mariner's portfolio in Q1 2026, its #3276 holding.
Mariner first reported a position in Orion Office REIT in Q3 2022 and has held it in 11 quarters since.
Mariner's Orion Office REIT position peaked at $982K in Q4 2024.
191 funds tracked by Wall St. Rank held Orion Office REIT as of Q1 2026.

Based on Mariner's 13F filing for Q1 2026, filed 13 May 2026.