Mariner
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Mariner’s SELLAS Life Sciences SLS Stock Holding History

Mariner’s Portfolio SLS Stock Details SLS Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$734K Buy
173,570
+14,420
+9% +$64.5K ﹤0.01% 2195
2025
Q4 		$600K Buy
159,150
+50,344
+46% +$97.8K ﹤0.01% 2326
2025
Q3 		$175K Buy
108,806
+57,697
+113% +$103K ﹤0.01% 3220
2025
Q2 		$112K Sell
51,109
-91
-0.2% -$140 ﹤0.01% 3222
2025
Q1 		$55.3K Buy
51,200
+591
+1% +$702 ﹤0.01% 3302
2024
Q4 		$52.6K Buy
50,609
+3,180
+7% +$3.63K ﹤0.01% 3283
2024
Q3 		$59.3K Buy
47,429
+2,500
+6% +$3.06K ﹤0.01% 3169
2024
Q2 		$53.5K Buy
44,929
+19,672
+78% +$26.8K ﹤0.01% 3046
2024
Q1 		$25.5K Buy
+25,257
New +$21.2K ﹤0.01% 3079
2017
Q2 		– Sell
-10
Closed -$9K – 551
2017
Q1 		$9K Buy
+10
New +$16.6K ﹤0.01% 590

Other funds holding SLS

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return
Jones Financial Companies
Jones Financial Companies Des Peres, Missouri $208B AUM 16.12% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Northern Trust
Northern Trust Chicago, Illinois $757B AUM 28.64% 1-Year Est. Return
VFT
Vanguard Fiduciary Trust Malvern, Pennsylvania $396B AUM

Mariner's SLS Position: Q1 2026 in Review

Mariner increased its SELLAS Life Sciences (SLS) stake by 9.1% in Q1 2026, buying an estimated $64.5K and bringing the position to 173,570 shares worth $734K. The position accounts for ﹤0.01% of the portfolio, ranked #2195.

Mariner first reported a position in SLS in Q1 2017 and has held it in 10 quarters since. 160 funds tracked by Wall St. Rank hold SLS as of Q1 2026.

  • Mariner held 173,570 shares of SELLAS Life Sciences worth $734K as of Q1 2026.
  • Mariner bought 14,420 SELLAS Life Sciences shares in Q1 2026, an estimated $64.5K.
  • SELLAS Life Sciences made up ﹤0.01% of Mariner's portfolio in Q1 2026, its #2195 holding.
  • Mariner first reported a position in SELLAS Life Sciences in Q1 2017 and has held it in 10 quarters since.
  • 160 funds tracked by Wall St. Rank held SELLAS Life Sciences as of Q1 2026.

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