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 | |
|---|---|---|---|---|---|---|
1701
First Majestic Silver
AG
$8.05B
| $2.7M | ﹤0.01% |
374,136
+318,312
| +570% | +$2.34M |
|
1702
argenx
ARGX
$57.4B
| $2.7M | ﹤0.01% |
+7,239
| New | +$2.68M |
|
1703
PUT
ProShares Ultra S&P500
SSO
$7.82B
| $2.68M | ﹤0.01% |
117,200
+46,400
| +66% | +$1.11M |
|
1704
CALL
Campbell Soup
CPB
$6.51B
| $2.68M | ﹤0.01% |
48,800
-230,400
| -83% | -$12.2M |
|
1705
CALL
Lantheus
LNTH
$6.82B
| $2.68M | ﹤0.01% |
32,500
-12,600
| -28% | -$813K |
|
1706
PUT
Navios Maritime Partners
NMM
$2.25B
| $2.68M | ﹤0.01% |
111,200
-26,600
| -19% | -$686K |
|
1707
CALL
H&R Block
HRB
$5.18B
| $2.67M | ﹤0.01% |
75,900
-60,200
| -44% | -$2.23M |
|
|
TGH
1708
CALL
DELISTED
Textainer Group Holdings limited
TGH
| $2.67M | ﹤0.01% |
83,300
+33,900
| +69% | +$1.11M |
|
1709
PUT
Pultegroup
PHM
$24.5B
| $2.67M | ﹤0.01% |
45,800
-71,700
| -61% | -$3.87M |
|
1710
PUT
Ecolab
ECL
$75.6B
| $2.67M | ﹤0.01% |
16,100
+3,400
| +27% | +$530K |
|
1711
CALL
Weyerhaeuser
WY
$17.3B
| $2.65M | ﹤0.01% |
87,800
-21,300
| -20% | -$671K |
|
|
EXAS
1712
PUT
DELISTED
Exact Sciences
EXAS
| $2.64M | ﹤0.01% |
39,000
-94,100
| -71% | -$6.05M |
|
1713
CALL
Virgin Galactic
SPCE
$320M
| $2.64M | ﹤0.01% |
32,590
-22,955
| -41% | -$2.29M |
|
1714
CALL
10x Genomics
TXG
$5.87B
| $2.63M | ﹤0.01% |
47,200
+43,700
| +1,249% | +$2.04M |
|
1715
CALL
Public Service Enterprise Group
PEG
$39.8B
| $2.63M | ﹤0.01% |
42,100
+33,900
| +413% | +$2.05M |
|
1716
CALL
Agilent Technologies
A
$39.1B
| $2.63M | ﹤0.01% |
19,000
-26,900
| -59% | -$3.93M |
|
1717
CALL
Verra Mobility
VRRM
$615M
| $2.63M | ﹤0.01% |
155,200
+122,500
| +375% | +$1.96M |
|
|
SIX
1718
PUT
DELISTED
Six Flags Entertainment Corp.
SIX
| $2.63M | ﹤0.01% |
98,300
+25,600
| +35% | +$684K |
|
1719
PUT
Tenaris
TS
$29.1B
| $2.62M | ﹤0.01% |
92,200
+90,600
| +5,663% | +$2.98M |
|
1720
CALL
Marriott Vacations Worldwide
VAC
$3.24B
| $2.62M | ﹤0.01% |
19,400
+15,100
| +351% | +$2.24M |
|
|
GAP
1721
CALL
The Gap Inc
GAP
$6.84B
| $2.62M | ﹤0.01% |
260,600
-245,300
| -48% | -$2.99M |
|
1722
Alpha Metallurgical Resources
AMR
$1.82B
| $2.62M | ﹤0.01% |
16,765
+14,912
| +805% | +$2.39M |
|
1723
CALL
Atkore
ATKR
$2.59B
| $2.61M | ﹤0.01% |
18,600
+11,100
| +148% | +$1.5M |
|
1724
Conagra Brands
CAG
$7.07B
| $2.61M | ﹤0.01% |
69,496
+48,039
| +224% | +$1.78M |
|
1725
PUT
GFL Environmental
GFL
$14.3B
| $2.61M | ﹤0.01% |
75,700
+29,600
| +64% | +$934K |
|
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.