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 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1601
Okta
OKTA
$24.1B
| $3.11M | ﹤0.01% |
+36,042
| New | +$2.74M |
|
|
UNVR
1602
CALL
DELISTED
Univar Solutions Inc.
UNVR
| $3.11M | ﹤0.01% |
88,700
-288,900
| -77% | -$9.8M |
|
1603
CALL
W.W. Grainger
GWW
$65.3B
| $3.1M | ﹤0.01% |
4,500
-6,300
| -58% | -$4.02M |
|
1604
PUT
East-West Bancorp
EWBC
$17.9B
| $3.1M | ﹤0.01% |
55,800
+53,800
| +2,690% | +$3.71M |
|
|
QLTB
1605
PUT
DELISTED
ISHARES BAA BA RATED CORP BOND FUND
QLTB
| $3.1M | ﹤0.01% |
22,500
+16,400
| +269% | +$2.26M |
|
1606
PUT
Perion Network
PERI
$367M
| $3.1M | ﹤0.01% |
78,200
+16,500
| +27% | +$549K |
|
1607
CALL
Omega Healthcare
OHI
$15.4B
| $3.09M | ﹤0.01% |
112,800
+41,700
| +59% | +$1.16M |
|
|
ITCI
1608
CALL
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $3.09M | ﹤0.01% |
57,000
+47,300
| +488% | +$2.29M |
|
1609
Vertex Pharmaceuticals
VRTX
$121B
| $3.08M | ﹤0.01% |
9,790
+9,224
| +1,630% | +$2.77M |
|
1610
Vanguard Total Stock Market ETF
VTI
$654B
| $3.08M | ﹤0.01% |
15,103
+15,018
| +17,668% | +$3.01M |
|
1611
CALL
Rockwell Automation
ROK
$51.4B
| $3.08M | ﹤0.01% |
10,500
+6,200
| +144% | +$1.76M |
|
1612
CALL
Green Plains
GPRE
$1.19B
| $3.08M | ﹤0.01% |
99,300
-108,800
| -52% | -$3.55M |
|
1613
CALL
Calumet Specialty Products
CLMT
$3.63B
| $3.07M | ﹤0.01% |
176,600
-96,000
| -35% | -$1.7M |
|
1614
CALL
Sempra
SRE
$60.8B
| $3.07M | ﹤0.01% |
40,600
+23,200
| +133% | +$1.78M |
|
1615
CALL
Amphenol
APH
$188B
| $3.06M | ﹤0.01% |
75,000
+61,000
| +436% | +$2.41M |
|
1616
CALL
Leonardo DRS
DRS
$12.8B
| $3.05M | ﹤0.01% |
235,400
+55,800
| +31% | +$721K |
|
1617
PUT
Pool Corp
POOL
$6.7B
| $3.05M | ﹤0.01% |
8,900
-4,900
| -36% | -$1.74M |
|
1618
PUT
Accel Entertainment
ACEL
$979M
| $3.04M | ﹤0.01% |
334,100
+331,200
| +11,421% | +$2.98M |
|
1619
CALL
Equity Residential
EQR
$25.4B
| $3.04M | ﹤0.01% |
50,700
+20,900
| +70% | +$1.28M |
|
1620
PUT
Stanley Black & Decker
SWK
$14.2B
| $3.04M | ﹤0.01% |
37,700
-14,900
| -28% | -$1.25M |
|
1621
CALL
e.l.f. Beauty
ELF
$4.56B
| $3.03M | ﹤0.01% |
36,800
+1,100
| +3% | +$74.2K |
|
1622
PUT
Cars.com
CARS
$641M
| $3.03M | ﹤0.01% |
156,900
+95,600
| +156% | +$1.63M |
|
|
MAXR
1623
PUT
DELISTED
Maxar Technologies Inc. Common Stock
MAXR
| $3.03M | ﹤0.01% |
59,300
-218,500
| -79% | -$11.2M |
|
1624
CALL
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27B
| $3.02M | ﹤0.01% |
6,600
-8,500
| -56% | -$3.96M |
|
|
SRG
1625
PUT
Seritage Growth Properties
SRG
$130M
| $3.01M | ﹤0.01% |
382,900
+8,400
| +2% | +$93.2K |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.