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Simplex Trading

Simplex Trading Portfolio holdings

AUM $149B
1-Year Est. Return 62.07%
 

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
+6.46%
1 Year Est. Return
+62.07%
3 Year Est. Return
+116.86%
5 Year Est. Return
+116.02%
10 Year Est. Return
+774.44%
AUM
$122B
AUM Growth
+$7.84B
Cap. Flow
-$3.39B
Cap. Flow %
-2.78%
Top 10 Hldgs %
42.57%
Holding
10,535
New
1,474
Increased
3,350
Reduced
3,913
Closed
1,517

Top Buys

Rank Stock Value
1
MSFT icon
Microsoft
MSFT
+$53.9M
2
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$52.9M
3
NVDA icon
NVIDIA
NVDA
+$47.1M
4
PYPL icon
PayPal
PYPL
+$41.7M
5
GOOG icon
Alphabet (Google) Class C
GOOG
+$28.4M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$51.4M
2
WMT icon
Walmart Inc
WMT
+$46.4M
3
OIH icon
VanEck Oil Services ETF
OIH
+$34.2M
4
ADBE icon
Adobe
ADBE
+$33.5M
5
SBUX icon
Starbucks
SBUX
+$26.8M

Sector Composition

Rank Sector Weight
1 Technology 0.41%
2 Healthcare 0.21%
3 Consumer Discretionary 0.21%
4 Communication Services 0.2%
5 Financials 0.15%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
NFBK
8651
CALL
DELISTED
Northfield Bancorp
NFBK
$1K ﹤0.01%
100
– –
NG icon
8652
PUT
NovaGold Resources
NG
$2.6B
$1K ﹤0.01%
400
+200
+100% +$1.07K
NGVC icon
8653
CALL
Vitamin Cottage Natural Grocers
NGVC
$691M
$1K ﹤0.01%
100
-2,500
-96% -$28.2K
NMFC icon
8654
CALL
New Mountain Finance
NMFC
$646M
$1K ﹤0.01%
100
-2,300
-96% -$27.7K
NMRK icon
8655
PUT
Newmark Group
NMRK
$2.73B
$1K ﹤0.01%
+200
New +$1.23K
NOAH
8656
PUT
Noah Holdings
NOAH
$588M
$1K ﹤0.01%
100
-2,900
-97% -$45.3K
NOMD icon
8657
PUT
Nomad Foods
NOMD
$1.64B
$1K ﹤0.01%
100
– –
NRDS icon
8658
PUT
NerdWallet
NRDS
$584M
$1K ﹤0.01%
200
-2,300
-92% -$26K
NREF
8659
PUT
NexPoint Real Estate Finance
NREF
$316M
$1K ﹤0.01%
+100
New +$1.43K
NRT
8660
North European Oil Royalty Trust
NRT
$81.7M
$1K ﹤0.01%
+112
New +$1.5K
NTST
8661
CALL
NETSTREIT Corp
NTST
$2.16B
$1K ﹤0.01%
100
-200
-67% -$3.59K
NTST
8662
NETSTREIT Corp
NTST
$2.16B
$1K ﹤0.01%
+61
New +$1.1K
NVAX icon
8663
Novavax
NVAX
$1.23B
$1K ﹤0.01%
200
+100
+100% +$786
NVVE icon
8664
CALL
Nuvve Holding Corp
NVVE
– –
0
– –
NWBI icon
8665
CALL
Northwest Bancshares
NWBI
$2.25B
$1K ﹤0.01%
100
-8,500
-99% -$94.5K
NX icon
8666
Quanex
NX
$854M
$1K ﹤0.01%
+47
New +$1.04K
OCGN icon
8667
PUT
Ocugen
OCGN
$410M
$1K ﹤0.01%
2,800
+1,400
+100% +$898
OFS icon
8668
CALL
OFS Capital
OFS
$43.8M
$1K ﹤0.01%
200
-4,100
-95% -$40.3K
OMEX icon
8669
CALL
Odyssey Marine Exploration
OMEX
$40.4M
$1K ﹤0.01%
300
-21,700
-99% -$70.3K
ONDS icon
8670
CALL
Ondas Inc
ONDS
$4.44B
$1K ﹤0.01%
1,500
-4,900
-77% -$4.66K
ONDS icon
8671
Ondas Inc
ONDS
$4.44B
$1K ﹤0.01%
2,228
-3,236
-59% -$3.08K
ONL
8672
Orion Office REIT
ONL
$148M
$1K ﹤0.01%
201
-2,385
-92% -$14.9K
ONL
8673
PUT
Orion Office REIT
ONL
$148M
$1K ﹤0.01%
200
-5,900
-97% -$36.8K
OOTO
8674
DELISTED
Direxion Daily Travel & Vacation Bull 2X Shares
OOTO
$1K ﹤0.01%
+74
New +$919
OSBC icon
8675
CALL
Old Second Bancorp
OSBC
$1.24B
$1K ﹤0.01%
+100
New +$1.27K
345 346
347
348 349

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Simplex Trading's Q2 2023 Portfolio in Review

As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.

Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.

By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.

  • Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
  • Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
  • Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
  • Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
  • Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
  • Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
  • Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.

Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.