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 | |
|---|---|---|---|---|---|---|
951
Teva Pharmaceuticals
TEVA
$36.3B
| $9.19M | 0.01% |
1,038,807
-235,311
| -18% | -$2.33M |
|
952
CALL
NRG Energy
NRG
$30.2B
| $9.18M | 0.01% |
267,800
-93,900
| -26% | -$3.11M |
|
953
PUT
Teladoc Health
TDOC
$1.56B
| $9.14M | 0.01% |
352,800
-116,000
| -25% | -$3.1M |
|
954
CALL
Hershey
HSY
$34.9B
| $9.13M | 0.01% |
35,900
-19,800
| -36% | -$4.65M |
|
955
CALL
MSCI
MSCI
$40.2B
| $9.12M | 0.01% |
16,300
+15,400
| +1,711% | +$8.15M |
|
956
PUT
Planet Fitness
PLNT
$4.29B
| $9.1M | 0.01% |
117,200
+800
| +0.7% | +$63.9K |
|
957
CALL
VeriSign
VRSN
$23.8B
| $9.09M | 0.01% |
43,000
+37,600
| +696% | +$7.75M |
|
958
State Street Materials Select Sector SPDR ETF
XLB
$8.35B
| $9.07M | 0.01% |
224,914
+180,810
| +410% | +$7.32M |
|
|
VTNR
959
CALL
DELISTED
Vertex Energy, Inc
VTNR
| $9.06M | 0.01% |
916,700
+17,500
| +2% | +$139K |
|
960
PUT
Alliant Energy
LNT
$19.2B
| $9.02M | 0.01% |
169,000
+160,900
| +1,986% | +$8.56M |
|
961
PUT
Bloom Energy
BE
$61.8B
| $8.98M | 0.01% |
450,500
+209,800
| +87% | +$4.59M |
|
962
CALL
Monster Beverage
MNST
$91.5B
| $8.96M | 0.01% |
165,900
+144,900
| +690% | +$7.43M |
|
963
PUT
Carlyle Group
CG
$16B
| $8.9M | 0.01% |
286,600
-50,500
| -15% | -$1.68M |
|
964
CALL
SentinelOne
S
$5.96B
| $8.8M | 0.01% |
538,100
+245,200
| +84% | +$3.7M |
|
965
Baidu
BIDU
$36.5B
| $8.79M | 0.01% |
58,281
+58,181
| +58,181% | +$8.25M |
|
966
CALL
Nutanix
NTNX
$14.2B
| $8.79M | 0.01% |
338,300
-159,900
| -32% | -$4.33M |
|
967
PUT
Sherwin-Williams
SHW
$76.6B
| $8.79M | 0.01% |
39,100
+9,300
| +31% | +$2.13M |
|
968
PUT
Becton Dickinson
BDX
$42.1B
| $8.76M | 0.01% |
35,600
-59,900
| -63% | -$14.7M |
|
|
PARA
969
DELISTED
Paramount Global Class B
PARA
| $8.76M | 0.01% |
392,750
-27,664
| -7% | -$593K |
|
970
PUT
Ferrari
RACE
$63.2B
| $8.75M | 0.01% |
32,300
-29,500
| -48% | -$7.53M |
|
971
PUT
Dominion Energy
D
$62.8B
| $8.74M | 0.01% |
156,400
-75,600
| -33% | -$4.42M |
|
972
CALL
Iron Mountain
IRM
$37.1B
| $8.73M | 0.01% |
165,100
-3,700
| -2% | -$194K |
|
973
PUT
Southern Company
SO
$109B
| $8.73M | 0.01% |
125,500
+4,600
| +4% | +$310K |
|
974
CALL
AutoNation
AN
$6.86B
| $8.71M | 0.01% |
64,800
+37,100
| +134% | +$4.76M |
|
975
CALL
Enbridge
ENB
$123B
| $8.69M | 0.01% |
227,700
-159,900
| -41% | -$6.27M |
|
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.