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 | |
|---|---|---|---|---|---|---|
5026
CALL
Vontier
VNT
$4.49B
| $112K | ﹤0.01% |
4,100
+2,800
| +215% | +$67.7K |
|
|
ACCD
5027
CALL
DELISTED
Accolade Inc
ACCD
| $112K | ﹤0.01% |
7,800
-2,600
| -25% | -$29.4K |
|
|
LL
5028
PUT
DELISTED
LL Flooring Holdings, Inc.
LL
| $112K | ﹤0.01% |
29,700
-24,900
| -46% | -$127K |
|
|
MDC
5029
CALL
DELISTED
M.D.C. Holdings, Inc.
MDC
| $112K | ﹤0.01% |
2,900
+700
| +32% | +$25.9K |
|
5030
CALL
Cellebrite
CLBT
$3.63B
| $111K | ﹤0.01% |
18,300
-8,600
| -32% | -$46.6K |
|
5031
PUT
Columbia Banking Systems
COLB
$8.84B
| $111K | ﹤0.01% |
+5,200
| New | +$144K |
|
5032
CALL
Financial Institutions
FISI
$812M
| $111K | ﹤0.01% |
+5,800
| New | +$136K |
|
5033
IAMGOLD
IAG
$8.42B
| $111K | ﹤0.01% |
41,065
-28,019
| -41% | -$71.3K |
|
|
LAND
5034
PUT
Gladstone Land Corp
LAND
$357M
| $111K | ﹤0.01% |
6,700
+2,400
| +56% | +$43.3K |
|
5035
ProShares Short Real Estate
REK
$11.7M
| $111K | ﹤0.01% |
5,559
-9,504
| -63% | -$186K |
|
|
BMTX
5036
CALL
DELISTED
BM Technologies, Inc.
BMTX
| $111K | ﹤0.01% |
31,700
-74,300
| -70% | -$301K |
|
|
AAN
5037
PUT
DELISTED
The Aaron's Company Inc
AAN
| $111K | ﹤0.01% |
11,500
+9,000
| +360% | +$116K |
|
|
SCU
5038
PUT
DELISTED
Sculptor Capital Management, Inc. Class A Common Stock
SCU
| $111K | ﹤0.01% |
13,000
-3,900
| -23% | -$35K |
|
5039
CALL
Coherus Oncology
CHRS
$227M
| $110K | ﹤0.01% |
+16,100
| New | +$125K |
|
5040
PUT
Compass Diversified
CODI
$756M
| $110K | ﹤0.01% |
5,800
+3,200
| +123% | +$65.5K |
|
5041
PUT
Excelerate Energy
EE
$1.22B
| $110K | ﹤0.01% |
5,000
-1,900
| -28% | -$42.2K |
|
5042
CALL
Hagerty
HGTY
$1.17B
| $110K | ﹤0.01% |
+12,700
| New | +$116K |
|
|
LGO
5043
PUT
Largo
LGO
$59.4M
| $110K | ﹤0.01% |
21,400
+20,200
| +1,683% | +$120K |
|
5044
Lexicon Pharmaceuticals
LXRX
$1.04B
| $110K | ﹤0.01% |
45,624
+28,416
| +165% | +$65.1K |
|
5045
CALL
Regency Centers
REG
$14.7B
| $110K | ﹤0.01% |
1,800
+1,100
| +157% | +$69.2K |
|
5046
SLM Corp
SLM
$4.86B
| $110K | ﹤0.01% |
8,905
-27,231
| -75% | -$402K |
|
|
SDC
5047
CALL
DELISTED
SmileDirectClub, Inc. Class A Common Stock
SDC
| $110K | ﹤0.01% |
256,000
-39,100
| -13% | -$20K |
|
|
BLDP
5048
Ballard Power Systems
BLDP
$841M
| $109K | ﹤0.01% |
19,609
-41,091
| -68% | -$237K |
|
|
CMPS
5049
CALL
Compass Pathways
CMPS
$1.56B
| $109K | ﹤0.01% |
11,000
-40,500
| -79% | -$373K |
|
5050
CALL
Crinetics Pharmaceuticals
CRNX
$8.85B
| $109K | ﹤0.01% |
6,800
+6,700
| +6,700% | +$124K |
|
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.