Simplex Trading Portfolio holdings
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.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
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 | |
|---|---|---|---|---|---|---|
7051
CALL
Spruce Power Holding Corp
SPRU
$38.6M
| $15K | ﹤0.01% |
2,450
-200
| -8% | -$1.25K |
|
7052
Sempra
SRE
$59.2B
| $15K | ﹤0.01% |
+210
| New | +$15.8K |
|
7053
Sensus Healthcare
SRTS
$48.4M
| $15K | ﹤0.01% |
4,989
+3,145
| +171% | +$11.4K |
|
7054
PUT
Savara
SVRA
$1.09B
| $15K | ﹤0.01% |
5,000
+2,000
| +67% | +$4.7K |
|
7055
CALL
Trinity Industries
TRN
$3.03B
| $15K | ﹤0.01% |
600
-200
| -25% | -$4.57K |
|
7056
CALL
Travelzoo
TZOO
$77.8M
| $15K | ﹤0.01% |
2,000
+900
| +82% | +$7.24K |
|
7057
PUT
Unifirst Corp
UNF
$5.43B
| $15K | ﹤0.01% |
+100
| New | +$16.8K |
|
7058
Vanguard Mid-Cap Value ETF
VOE
$24.1B
| $15K | ﹤0.01% |
109
-2,548
| -96% | -$340K |
|
7059
CALL
WPP
WPP
$4.59B
| $15K | ﹤0.01% |
300
-2,300
| -88% | -$129K |
|
7060
Expro Ltd
XPRO
$1.75B
| $15K | ﹤0.01% |
884
-5,501
| -86% | -$99.2K |
|
|
TPC
7061
CALL
Tutor Perini Cor
TPC
$4.31B
| $15K | ﹤0.01% |
2,200
-4,500
| -67% | -$26.9K |
|
|
EXAI
7062
PUT
DELISTED
Exscientia Plc American Depositary Shares
EXAI
| $15K | ﹤0.01% |
2,600
-1,300
| -33% | -$7.97K |
|
|
SOLO
7063
CALL
DELISTED
Electrameccanica Vehicles Corp. Ltd.
SOLO
| $15K | ﹤0.01% |
25,700
-5,100
| -17% | -$2.94K |
|
|
FOCS
7064
PUT
DELISTED
Focus Financial Partners Inc. Class A
FOCS
| $15K | ﹤0.01% |
300
-1,100
| -79% | -$57.3K |
|
7065
CALL
Federal Agricultural Mortgage Class A
AGM.A
$1.62B
| $14K | ﹤0.01% |
100
| – | – |
|
7066
Arena Group
AREN
$50.9M
| $14K | ﹤0.01% |
+3,094
| New | +$12.3K |
|
7067
PUT
Arrow Electronics
ARW
$10.8B
| $14K | ﹤0.01% |
+100
| New | +$12.4K |
|
7068
Aterian
ATER
$4.21M
| $14K | ﹤0.01% |
2,610
+2,602
| +32,525% | +$20.2K |
|
7069
CALL
Autohome
ATHM
$2.65B
| $14K | ﹤0.01% |
500
+100
| +25% | +$2.99K |
|
7070
PUT
Aurora
AUR
$12.2B
| $14K | ﹤0.01% |
5,100
+300
| +6% | +$502 |
|
7071
CALL
Credicorp
BAP
$30.9B
| $14K | ﹤0.01% |
+100
| New | +$13.7K |
|
7072
CALL
BGSF Inc
BGSF
$56.6M
| $14K | ﹤0.01% |
1,500
| – | – |
|
7073
PUT
DMC Global
BOOM
$112M
| $14K | ﹤0.01% |
800
-1,300
| -62% | -$23.5K |
|
7074
Churchill Downs
CHDN
$6.22B
| $14K | ﹤0.01% |
+105
| New | +$14.4K |
|
7075
Citizens
CIA
$257M
| $14K | ﹤0.01% |
+5,951
| New | +$13.6K |
|
Similar funds
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.