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Simplex Trading

Simplex Trading Portfolio holdings

AUM $171B
1-Year Est. Return 85%
 

Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.

This Fund
S&P 500
This Quarter Est. Return
+39.06%
1 Year Est. Return
+85%
3 Year Est. Return
+183.25%
5 Year Est. Return
+145.21%
10 Year Est. Return
+1,056.84%
AUM
$171B
AUM Growth
+$21.5B
Cap. Flow
-$29.5M
Cap. Flow %
-0.02%
Top 10 Hldgs %
49.56%
Holding
10,638
New
1,714
Increased
3,712
Reduced
3,486
Closed
1,487

Top Buys

Rank Stock Value
1
IWM icon
iShares Russell 2000 ETF
IWM
+$146M
2
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$108M
3
AAPL icon
Apple
AAPL
+$62.9M
4
TSLA icon
Tesla
TSLA
+$51.9M
5
MU icon
Micron Technology
MU
+$39.5M

Top Sells

Rank Stock Value
1
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$108M
2
META icon
Meta Platforms (Facebook)
META
+$104M
3
AMD icon
Advanced Micro Devices
AMD
+$92.1M
4
AMZN icon
Amazon
AMZN
+$90.3M
5
TSM icon
TSMC
TSM
+$82.9M

Sector Composition

Rank Sector Weight
1 Miscellaneous 98.28%
2 Technology 0.76%
3 Consumer Discretionary 0.21%
4 Communication Services 0.19%
5 Healthcare 0.15%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
GTIM icon
9676
CALL
Good Times Restaurants
GTIM
$16M
– –
-100
Closed -$117
GUSH icon
9677
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$244M
– –
-7,781
Closed -$285K
GYRE icon
9678
Gyre Therapeutics
GYRE
$727M
– –
-674
Closed -$4.7K
GYRE icon
9679
PUT
Gyre Therapeutics
GYRE
$727M
– –
-2,000
Closed -$13.9K
HAL icon
9680
Halliburton
HAL
$30.9B
– –
-13,835
Closed -$541K
HBNC icon
9681
CALL
Horizon Bancorp
HBNC
$1.02B
– –
-900
Closed -$14.9K
HCKT icon
9682
Hackett Group
HCKT
$279M
– –
-284
Closed -$3.32K
HDGE icon
9683
AdvisorShares Ranger Equity Bear ETF
HDGE
$51.5M
– –
-2,649
Closed -$47.5K
HGTY icon
9684
PUT
Hagerty
HGTY
$1.38B
– –
-1,000
Closed -$10.5K
HGV icon
9685
Hilton Grand Vacations
HGV
$3.27B
– –
-2
Closed -$96
HIBL icon
9686
Direxion Daily S&P 500 High Beta Bull 3X ETF
HIBL
$81.7M
– –
-56
Closed -$3.35K
HIPO icon
9687
CALL
Hippo Holdings
HIPO
$894M
– –
-100
Closed -$2.61K
HIPO icon
9688
PUT
Hippo Holdings
HIPO
$894M
– –
-200
Closed -$5.21K
HIW icon
9689
Highwoods Properties
HIW
$3.44B
– –
-568
Closed -$14.7K
HL icon
9690
Hecla Mining
HL
$13.9B
– –
-118,499
Closed -$2.08M
HLMN icon
9691
Hillman Solutions
HLMN
$1.49B
– –
-387
Closed -$3.22K
HLNE icon
9692
Hamilton Lane
HLNE
$4.47B
– –
-1,102
Closed -$98K
HODL icon
9693
VanEck Bitcoin Trust
HODL
$1.33B
– –
-67
Closed -$1.36K
HODL icon
9694
PUT
VanEck Bitcoin Trust
HODL
$1.33B
– –
-300
Closed -$5.75K
HOLX
9695
CALL
DELISTED
Hologic
HOLX
– –
-19,000
Closed -$1.44M
HOLX
9696
PUT
DELISTED
Hologic
HOLX
– –
-58,600
Closed -$4.43M
HRI icon
9697
PUT
Herc Holdings
HRI
$4.71B
– –
-6,000
Closed -$597K
HRB icon
9698
H&R Block
HRB
$6.05B
– –
-1,540
Closed -$53.7K
HRTG icon
9699
Heritage Insurance Holdings
HRTG
$1.01B
– –
-10,676
Closed -$266K
HSBC icon
9700
HSBC
HSBC
$367B
– –
-17,986
Closed -$1.64M
386 387
388
389 390

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Simplex Trading's Q2 2026 Portfolio in Review

As of Q2 2026, Simplex Trading held 10,638 positions worth $171B, up 14% from $149B the previous quarter. Its ten largest holdings account for 50% of the portfolio.

Simplex Trading's Q2 2026 filing shows 1,714 new, 3,712 increased, 3,486 reduced and 1,487 closed positions. Its largest new stake was Micron Technology: 52,682 shares worth $60.8M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $108M.

By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.

  • Simplex Trading's largest Q2 2026 buy was Micron Technology: 52,682 shares worth $60.8M.
  • Simplex Trading added most to iShares Russell 2000 ETF in Q2 2026, an estimated $146M increase.
  • Simplex Trading's biggest Q2 2026 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $108M.
  • Simplex Trading fully exited Intel in Q2 2026, selling an estimated $76.6M.
  • Simplex Trading's ten largest holdings make up 50% of its $171B portfolio in Q2 2026.
  • Simplex Trading opened 1,714 new positions and closed 1,487 in Q2 2026.
  • Simplex Trading's portfolio value rose 14% quarter-over-quarter to $171B.

Based on Simplex Trading's 13F filing for Q2 2026, filed 12 Aug 2026.