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 | |
|---|---|---|---|---|---|---|
2351
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27B
| $1.29M | ﹤0.01% |
2,821
-415
| -13% | -$193K |
|
2352
CALL
DXC Technology
DXC
$1.63B
| $1.29M | ﹤0.01% |
50,500
-356,600
| -88% | -$9.72M |
|
|
AIV
2353
Aimco
AIV
$380M
| $1.29M | ﹤0.01% |
+167,404
| New | +$1.25M |
|
2354
PUT
Equity Residential
EQR
$25.4B
| $1.28M | ﹤0.01% |
21,400
-94,700
| -82% | -$5.81M |
|
2355
CALL
Fluence Energy
FLNC
$1.78B
| $1.28M | ﹤0.01% |
63,400
+58,900
| +1,309% | +$1.17M |
|
2356
PUT
OneWater Marine
ONEW
$214M
| $1.28M | ﹤0.01% |
45,900
+43,900
| +2,195% | +$1.25M |
|
2357
PUT
Viatris
VTRS
$20.1B
| $1.28M | ﹤0.01% |
133,400
-208,600
| -61% | -$2.31M |
|
2358
PUT
Vermilion Energy
VET
$1.73B
| $1.28M | ﹤0.01% |
98,700
+50,200
| +104% | +$707K |
|
2359
CALL
Dycom Industries
DY
$12.9B
| $1.27M | ﹤0.01% |
13,600
+8,300
| +157% | +$771K |
|
|
SNV
2360
PUT
DELISTED
Synovus
SNV
| $1.27M | ﹤0.01% |
41,200
-5,400
| -12% | -$206K |
|
2361
Realty Income
O
$61.2B
| $1.27M | ﹤0.01% |
20,053
-5,559
| -22% | -$360K |
|
2362
CALL
Trane Technologies
TT
$106B
| $1.27M | ﹤0.01% |
6,900
+4,400
| +176% | +$799K |
|
2363
PUT
Group 1 Automotive
GPI
$3.94B
| $1.27M | ﹤0.01% |
5,600
+1,600
| +40% | +$339K |
|
2364
PUT
Huntington Bancshares
HBAN
$35.1B
| $1.27M | ﹤0.01% |
113,100
-27,500
| -20% | -$383K |
|
2365
PUT
Amplify Junior Silver Miners ETF
SILJ
$3.27B
| $1.27M | ﹤0.01% |
109,300
-42,300
| -28% | -$447K |
|
2366
Federated Hermes
FHI
$4.4B
| $1.26M | ﹤0.01% |
+31,532
| New | +$1.24M |
|
2367
CALL
PagSeguro Digital
PAGS
$2.57B
| $1.26M | ﹤0.01% |
147,500
-56,400
| -28% | -$504K |
|
2368
CALL
NeoGenomics
NEO
$1.81B
| $1.26M | ﹤0.01% |
72,500
-10,000
| -12% | -$142K |
|
2369
CALL
BioCryst Pharmaceuticals
BCRX
$2.37B
| $1.26M | ﹤0.01% |
151,200
-83,800
| -36% | -$807K |
|
2370
CALL
Dentsply Sirona
XRAY
$2.59B
| $1.26M | ﹤0.01% |
32,100
-31,800
| -50% | -$1.17M |
|
2371
RTX Corp
RTX
$287B
| $1.26M | ﹤0.01% |
+12,858
| New | +$1.27M |
|
2372
PUT
Zevra Therapeutics
ZVRA
$563M
| $1.26M | ﹤0.01% |
228,800
-220,700
| -49% | -$1.17M |
|
|
EMBK
2373
PUT
DELISTED
Embark Technology, Inc. Common Stock
EMBK
| $1.26M | ﹤0.01% |
+447,800
| New | +$1.65M |
|
2374
PUT
uniQure
QURE
$2.68B
| $1.26M | ﹤0.01% |
62,400
-9,600
| -13% | -$201K |
|
2375
CALL
NuScale Power
SMR
$2.8B
| $1.26M | ﹤0.01% |
138,200
-43,800
| -24% | -$439K |
|
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.