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Mariner

Mariner Portfolio holdings

AUM $85.7B
1-Year Est. Return 24.21%
This Fund
S&P 500
This Quarter Est. Return
+2.85%
1 Year Est. Return
+24.21%
3 Year Est. Return
+74.24%
5 Year Est. Return
+87.67%
10 Year Est. Return
+269.13%
AUM
$84B
AUM Growth
+$6.6B
Cap. Flow
+$5.06B
Cap. Flow %
6.03%
Top 10 Hldgs %
28.85%
Holding
3,865
New
323
Increased
1,970
Reduced
1,148
Closed
341

Top Buys

Rank Stock Value
1
NVDA icon
NVIDIA
NVDA
+$808M
2
MSFT icon
Microsoft
MSFT
+$249M
3
AAPL icon
Apple
AAPL
+$229M
4
IVV icon
iShares Core S&P 500 ETF
IVV
+$196M
5
AGG icon
iShares Core US Aggregate Bond ETF
AGG
+$125M

Top Sells

Rank Stock Value
1
USD icon
ProShares Ultra Semiconductors
USD
+$158M
2
WMB icon
Williams Companies
WMB
+$138M
3
JPM icon
JPMorgan Chase
JPM
+$85.4M
4
EEM icon
iShares MSCI Emerging Markets ETF
EEM
+$45.7M
5
SNPS icon
Synopsys
SNPS
+$42.6M

Sector Composition

Rank Sector Weight
1 Technology 22.87%
2 Financials 8%
3 Consumer Discretionary 5.52%
4 Healthcare 5.25%
5 Communication Services 4.86%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
SSK
3851
REX-Osprey SOL + Staking ETF
SSK
$69.9M
– –
-8,512
Closed -$272K
BLSH
3852
Bullish
BLSH
$3.63B
– –
-3,520
Closed -$224K
QALT
3853
SEI DBi Multi-Strategy Alternative ETF
QALT
$192M
– –
-7,984
Closed -$203K
BDYN
3854
iShares Dynamic Equity Active ETF
BDYN
$2.97B
– –
-10,233
Closed -$259K
UTF.RT
3855
DELISTED
Cohen & Steers Infrastructure Fund Rights exp Oct 16 2025
UTF.RT
– –
-33,525
Closed -$2.62K
151 152 153 154
155

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Belvedere Trading
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Sanders Capital
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Mariner's Q4 2025 Portfolio in Review

As of Q4 2025, Mariner held 3,865 positions worth $84B, up 8.5% from $77.4B the previous quarter. Its ten largest holdings account for 29% of the portfolio.

Mariner deployed $5.06B of net new capital in Q4 2025, opening 323 new positions and adding to 1,970 existing holdings. Its largest new stake was Flexsteel Industries: 1,167,357 shares worth $46.1M.

By sector, the portfolio is most concentrated in Technology at 23% of assets, up from 23% a quarter earlier, followed by Financials and Consumer Discretionary.

On the sell side, the largest reduction was ProShares Ultra Semiconductors, an estimated $158M trimmed.

  • Mariner's largest Q4 2025 buy was Flexsteel Industries: 1,167,357 shares worth $46.1M.
  • Mariner added most to NVIDIA in Q4 2025, an estimated $808M increase.
  • Mariner's biggest Q4 2025 reduction was ProShares Ultra Semiconductors, cutting an estimated $158M.
  • Mariner fully exited iShares iBonds Dec 2025 Term Corporate ETF in Q4 2025, selling an estimated $22.7M.
  • Mariner's ten largest holdings make up 29% of its $84B portfolio in Q4 2025.
  • Mariner opened 323 new positions and closed 341 in Q4 2025.
  • Mariner's portfolio value rose 8.5% quarter-over-quarter to $84B.

Based on Mariner's 13F filing for Q4 2025, filed 13 Feb 2026.