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 | |
|---|---|---|---|---|---|---|
|
RXDX
1401
CALL
DELISTED
Prometheus Biosciences, Inc. Common Stock
RXDX
| $4.28M | ﹤0.01% |
39,900
-105,100
| -72% | -$12.1M |
|
1402
PUT
Paylocity
PCTY
$6.71B
| $4.27M | ﹤0.01% |
21,500
-17,000
| -44% | -$3.34M |
|
|
FL
1403
CALL
DELISTED
Foot Locker
FL
| $4.26M | ﹤0.01% |
107,300
+34,700
| +48% | +$1.45M |
|
1404
PUT
Scotiabank
BNS
$106B
| $4.24M | ﹤0.01% |
84,200
-5,300
| -6% | -$272K |
|
1405
CALL
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $4.24M | ﹤0.01% |
42,300
-74,900
| -64% | -$7.42M |
|
1406
PUT
Citizens Financial Group
CFG
$30.4B
| $4.22M | ﹤0.01% |
139,000
+95,300
| +218% | +$3.73M |
|
1407
CALL
Bloom Energy
BE
$52.6B
| $4.21M | ﹤0.01% |
211,500
+61,900
| +41% | +$1.36M |
|
1408
CALL
Cboe Global Markets
CBOE
$29.8B
| $4.21M | ﹤0.01% |
31,400
+9,100
| +41% | +$1.14M |
|
|
LAZR
1409
PUT
DELISTED
Luminar Technologies
LAZR
| $4.21M | ﹤0.01% |
43,307
+30,187
| +230% | +$3.17M |
|
1410
Direxion Daily Financial Bull 3x ETF
FAS
$2.4B
| $4.21M | ﹤0.01% |
+73,044
| New | +$5.55M |
|
1411
PUT
PTC
PTC
$13.7B
| $4.21M | ﹤0.01% |
32,800
+28,000
| +583% | +$3.56M |
|
1412
CALL
Wingstop
WING
$3.68B
| $4.2M | ﹤0.01% |
22,900
+5,800
| +34% | +$952K |
|
1413
Canadian Solar
CSIQ
$906M
| $4.2M | ﹤0.01% |
105,545
-72,654
| -41% | -$2.88M |
|
1414
PUT
J.M. Smucker
SJM
$12.6B
| $4.2M | ﹤0.01% |
26,700
+8,600
| +48% | +$1.31M |
|
1415
PUT
Orion
OEC
$394M
| $4.2M | ﹤0.01% |
161,000
+74,200
| +85% | +$1.68M |
|
1416
PUT
UiPath
PATH
$5.62B
| $4.2M | ﹤0.01% |
239,200
+76,600
| +47% | +$1.16M |
|
1417
CALL
Quanta Services
PWR
$93.9B
| $4.2M | ﹤0.01% |
25,200
+7,100
| +39% | +$1.09M |
|
1418
CALL
Fastenal
FAST
$54B
| $4.19M | ﹤0.01% |
155,400
-54,400
| -26% | -$1.39M |
|
1419
CALL
Welltower
WELL
$178B
| $4.19M | ﹤0.01% |
58,400
+10,300
| +21% | +$747K |
|
1420
PUT
Loews
L
$24.3B
| $4.18M | ﹤0.01% |
72,100
+71,700
| +17,925% | +$4.25M |
|
1421
CALL
Gen Digital
GEN
$15.6B
| $4.18M | ﹤0.01% |
243,400
+215,000
| +757% | +$4.31M |
|
1422
CALL
Galicia Financial Group
GGAL
$7.92B
| $4.17M | ﹤0.01% |
379,900
+268,400
| +241% | +$3.32M |
|
1423
CALL
Nokia
NOK
$50.8B
| $4.16M | ﹤0.01% |
848,100
-313,500
| -27% | -$1.48M |
|
1424
PUT
NRG Energy
NRG
$29.8B
| $4.16M | ﹤0.01% |
121,400
-45,900
| -27% | -$1.52M |
|
1425
iShares Mortgage Real Estate ETF
REM
$542M
| $4.16M | ﹤0.01% |
190,543
+102,710
| +117% | +$2.45M |
|
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.