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 | |
|---|---|---|---|---|---|---|
2826
PUT
GE HealthCare
GEHC
$27.6B
| $779K | ﹤0.01% |
+9,500
| New | +$678K |
|
2827
PUT
Corteva
CTVA
$59.7B
| $777K | ﹤0.01% |
12,900
-29,600
| -70% | -$1.81M |
|
|
VTNR
2828
PUT
DELISTED
Vertex Energy, Inc
VTNR
| $776K | ﹤0.01% |
78,600
-138,500
| -64% | -$1.1M |
|
2829
Bunge Global
BG
$23.6B
| $775K | ﹤0.01% |
+8,118
| New | +$789K |
|
2830
CALL
Chegg
CHGG
$108M
| $775K | ﹤0.01% |
47,600
-106,800
| -69% | -$2M |
|
|
GOL
2831
PUT
DELISTED
Gol Linhas Aéreas Inteligentes S.A. American Depositary Shares (Each representing Ten Preferred Shares)
GOL
| $775K | ﹤0.01% |
294,800
+94,400
| +47% | +$254K |
|
2832
CALL
Murphy USA
MUSA
$11.3B
| $774K | ﹤0.01% |
3,000
-700
| -19% | -$182K |
|
2833
PUT
Terex
TEX
$7.98B
| $774K | ﹤0.01% |
16,000
+300
| +2% | +$15.3K |
|
2834
CALL
Alphatec Holdings
ATEC
$1.27B
| $773K | ﹤0.01% |
49,600
+44,700
| +912% | +$632K |
|
2835
PUT
NETGEAR
NTGR
$669M
| $773K | ﹤0.01% |
41,800
+39,800
| +1,990% | +$747K |
|
2836
PUT
Invesco DB Base Metals Fund
DBB
$306M
| $771K | ﹤0.01% |
37,900
+15,000
| +66% | +$308K |
|
2837
CALL
Prospect Capital
PSEC
$1.06B
| $771K | ﹤0.01% |
110,800
+16,500
| +17% | +$120K |
|
2838
CALL
Kosmos Energy
KOS
$1.56B
| $770K | ﹤0.01% |
103,500
+45,800
| +79% | +$335K |
|
|
CRON
2839
CALL
Cronos Group
CRON
$1.05B
| $769K | ﹤0.01% |
396,700
-204,200
| -34% | -$458K |
|
2840
CALL
Blue Owl Capital
OBDC
$5.35B
| $769K | ﹤0.01% |
61,000
+43,000
| +239% | +$553K |
|
2841
CALL
Aramark
ARMK
$15B
| $766K | ﹤0.01% |
29,639
-21,883
| -42% | -$623K |
|
2842
CALL
Genius Sports
GENI
$1.73B
| $765K | ﹤0.01% |
153,800
+45,500
| +42% | +$213K |
|
|
TSE
2843
DELISTED
Trinseo
TSE
| $765K | ﹤0.01% |
+36,737
| New | +$899K |
|
|
MRNS
2844
DELISTED
Marinus Pharmaceuticals, Inc
MRNS
| $765K | ﹤0.01% |
110,917
+26,912
| +32% | +$169K |
|
2845
CALL
Bio-Techne
TECH
$11.2B
| $764K | ﹤0.01% |
+10,300
| New | +$794K |
|
2846
CALL
Babcock & Wilcox
BW
$1.43B
| $763K | ﹤0.01% |
126,000
+89,000
| +241% | +$549K |
|
2847
Sonos
SONO
$1.75B
| $762K | ﹤0.01% |
38,859
+21,951
| +130% | +$419K |
|
2848
ProShares Ultra S&P500
SSO
$7.82B
| $762K | ﹤0.01% |
30,382
+23,942
| +372% | +$574K |
|
2849
PUT
DoubleVerify
DV
$1.62B
| $759K | ﹤0.01% |
25,200
-32,200
| -56% | -$843K |
|
2850
Ocular Therapeutix
OCUL
$1.86B
| $759K | ﹤0.01% |
144,030
+122,551
| +571% | +$582K |
|
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.