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 | |
|---|---|---|---|---|---|---|
2751
PUT
Universal Health Services
UHS
$9.43B
| $838K | ﹤0.01% |
6,600
+5,900
| +843% | +$814K |
|
2752
CALL
Vaalco Energy
EGY
$594M
| $837K | ﹤0.01% |
197,400
+25,900
| +15% | +$118K |
|
2753
PUT
Natural Resource Partners
NRP
$1.3B
| $835K | ﹤0.01% |
16,000
+11,100
| +227% | +$595K |
|
2754
PUT
Bank of Hawaii
BOH
$3.33B
| $833K | ﹤0.01% |
16,000
+13,000
| +433% | +$913K |
|
2755
PUT
ICICI Bank
IBN
$106B
| $832K | ﹤0.01% |
38,600
-196,200
| -84% | -$4.09M |
|
2756
CALL
Navios Maritime Partners
NMM
$2.25B
| $832K | ﹤0.01% |
34,500
-70,500
| -67% | -$1.82M |
|
2757
CALL
Ultragenyx Pharmaceutical
RARE
$2.65B
| $830K | ﹤0.01% |
20,700
+13,500
| +188% | +$579K |
|
2758
PUT
RadNet
RDNT
$4.84B
| $830K | ﹤0.01% |
33,200
+16,000
| +93% | +$348K |
|
2759
CALL
Global X S&P 500 Tail Risk ETF
XTR
$4.77M
| $829K | ﹤0.01% |
36,000
-4,700
| -12% | -$110K |
|
|
MRTX
2760
CALL
DELISTED
Mirati Therapeutics, Inc. Common Stock
MRTX
| $829K | ﹤0.01% |
22,300
-70,900
| -76% | -$3.19M |
|
2761
PUT
BigBear.ai
BBAI
$1.32B
| $827K | ﹤0.01% |
339,100
+330,100
| +3,668% | +$880K |
|
2762
LKQ Corp
LKQ
$6.58B
| $826K | ﹤0.01% |
+14,560
| New | +$821K |
|
2763
TE Connectivity
TEL
$58.8B
| $826K | ﹤0.01% |
6,305
-6,357
| -50% | -$804K |
|
2764
CALL
Pinnacle West Capital
PNW
$12.9B
| $824K | ﹤0.01% |
10,400
+5,100
| +96% | +$385K |
|
2765
Vanguard Real Estate ETF
VNQ
$39.9B
| $824K | ﹤0.01% |
9,933
-154
| -2% | -$13.2K |
|
|
HDRO
2766
DELISTED
Defiance Next Gen H2 ETF
HDRO
| $824K | ﹤0.01% |
10,548
+1,181
| +13% | +$97.8K |
|
|
CD
2767
CALL
DELISTED
Chindata Group Holdings Limited American Depositary Shares
CD
| $824K | ﹤0.01% |
118,000
+9,900
| +9% | +$75.8K |
|
|
2768
CALL
LKQ Corp
LKQ
$6.58B
| $823K | ﹤0.01% |
14,500
-39,100
| -73% | -$2.2M |
|
2769
PUT
Lear
LEA
$7.19B
| $822K | ﹤0.01% |
5,900
+2,900
| +97% | +$401K |
|
2770
ArcBest
ARCB
$3.44B
| $821K | ﹤0.01% |
8,885
+4,425
| +99% | +$398K |
|
2771
Gartner
IT
$9.41B
| $821K | ﹤0.01% |
2,523
+1,230
| +95% | +$407K |
|
2772
Cintas
CTAS
$82.4B
| $819K | ﹤0.01% |
7,084
+2,084
| +42% | +$230K |
|
2773
CALL
Northern Trust
NTRS
$22.2B
| $819K | ﹤0.01% |
9,300
+5,100
| +121% | +$472K |
|
2774
Fortive
FTV
$19B
| $818K | ﹤0.01% |
+15,933
| New | +$802K |
|
2775
CALL
SandRidge Energy
SD
$510M
| $817K | ﹤0.01% |
56,700
-46,300
| -45% | -$707K |
|
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.