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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
OFG icon
9626
CALL
OFG Bancorp
OFG
$2.21B
– –
-12,600
Closed -$314K
OFIX icon
9627
PUT
Orthofix Medical
OFIX
$443M
– –
-200
Closed -$3K
OFS icon
9628
OFS Capital
OFS
$44.6M
$0 ﹤0.01%
6
-651
-99% -$6.39K
OFS icon
9629
PUT
OFS Capital
OFS
$44.6M
– –
-3,800
Closed -$39K
OGI
9630
PUT
Organigram Holdings
OGI
$128M
– –
-1,125
Closed -$2K
OGN icon
9631
Organon & Co
OGN
$3.56B
– –
-19,295
Closed -$419K
OGIG icon
9632
ALPS O'Shares Global Internet Giants ETF
OGIG
$99.3M
– –
-134
Closed -$3K
OI icon
9633
O-I Glass
OI
$1.35B
– –
-4,082
Closed -$88.1K
OIH icon
9634
VanEck Oil Services ETF
OIH
$2.03B
– –
-123,252
Closed -$34.2M
OLPX
9635
DELISTED
Olaplex Holdings
OLPX
– –
-102,294
Closed -$375K
OMER icon
9636
Omeros
OMER
$744M
– –
-1,732
Closed -$10.1K
OMFL icon
9637
Invesco Russell 1000 Dynamic Multifactor ETF
OMFL
$4.67B
– –
-49
Closed -$2K
ACH
9638
PUT
Accendra Health
ACH
$231M
– –
-10,000
Closed -$145K
ONL
9639
CALL
Orion Office REIT
ONL
$148M
– –
-400
Closed -$2K
ONTO icon
9640
PUT
Onto Innovation
ONTO
$14.6B
– –
-100
Closed -$8K
ONTF
9641
DELISTED
ON24
ONTF
$0 ﹤0.01%
36
-41,674
-100% -$346K
ONTF
9642
PUT
DELISTED
ON24
ONTF
– –
-160,300
Closed -$1.4M
OPAD icon
9643
Offerpad Solutions
OPAD
$22.3M
– –
-283
Closed -$23.8K
OPAL icon
9644
CALL
OPAL Fuels
OPAL
$73.5M
– –
-1,000
Closed -$6K
OPAL icon
9645
OPAL Fuels
OPAL
$73.5M
– –
-1,356
Closed -$9K
OPBK icon
9646
OP Bancorp
OPBK
$221M
– –
-323
Closed -$2K
OPBK icon
9647
PUT
OP Bancorp
OPBK
$221M
– –
-600
Closed -$5K
OPK icon
9648
Opko Health
OPK
$899M
– –
-113,893
Closed -$178K
OPRT icon
9649
PUT
Oportun Financial
OPRT
$247M
– –
-19,700
Closed -$76K
OPY icon
9650
CALL
Oppenheimer Holdings
OPY
$1.18B
– –
-3,400
Closed -$133K
384 385
386
387 388

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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.