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 | |
|---|---|---|---|---|---|---|
7101
Amplitude
AMPL
$1.18B
| $16K | ﹤0.01% |
+1,348
| New | +$17.9K |
|
7102
American Well
AMWL
$180M
| $16K | ﹤0.01% |
352
-815
| -70% | -$52.3K |
|
7103
PUT
Amphenol
APH
$185B
| $16K | ﹤0.01% |
400
-1,000
| -71% | -$39.5K |
|
7104
CALL
Accuray
ARAY
$27.5M
| $16K | ﹤0.01% |
5,700
+1,500
| +36% | +$4.09K |
|
7105
PUT
Arqit Quantum
ARQQ
$270M
| $16K | ﹤0.01% |
476
+316
| +198% | +$14.9K |
|
7106
PUT
AvePoint
AVPT
$2.76B
| $16K | ﹤0.01% |
3,900
+2,500
| +179% | +$11.3K |
|
7107
PUT
BlackSky Technology
BKSY
$843M
| $16K | ﹤0.01% |
1,363
+763
| +127% | +$10.3K |
|
7108
PUT
Barnes & Noble Education
BNED
$435M
| $16K | ﹤0.01% |
111
-8
| -7% | -$1.61K |
|
7109
CALL
Broadwind
BWEN
$81.7M
| $16K | ﹤0.01% |
4,200
-3,000
| -42% | -$12.8K |
|
|
7110
PUT
Broadwind
BWEN
$81.7M
| $16K | ﹤0.01% |
+4,200
| New | +$17.9K |
|
|
CHMI
7111
PUT
Cherry Hill Mortgage Investment Corp
CHMI
$82.3M
| $16K | ﹤0.01% |
3,000
+1,100
| +58% | +$6.98K |
|
7112
Cheniere Energy
CQP
$30.5B
| $16K | ﹤0.01% |
357
-861
| -71% | -$44K |
|
7113
CALL
Deluxe
DLX
$1.25B
| $16K | ﹤0.01% |
1,000
-4,300
| -81% | -$78.4K |
|
|
7114
PUT
Deluxe
DLX
$1.25B
| $16K | ﹤0.01% |
1,000
-5,600
| -85% | -$102K |
|
|
EB
7115
DELISTED
Eventbrite
EB
| $16K | ﹤0.01% |
+1,908
| New | +$15.7K |
|
7116
CALL
Enanta Pharmaceuticals
ENTA
$362M
| $16K | ﹤0.01% |
400
-3,400
| -89% | -$162K |
|
7117
Galectin Therapeutics
GALT
$230M
| $16K | ﹤0.01% |
7,997
-11,726
| -59% | -$18.9K |
|
7118
PUT
Hillman Solutions
HLMN
$1.57B
| $16K | ﹤0.01% |
2,000
-59,200
| -97% | -$515K |
|
7119
iShares International Treasury Bond ETF
IGOV
$1.51B
| $16K | ﹤0.01% |
403
-1,043
| -72% | -$41.5K |
|
7120
CALL
Information Services Group
III
$204M
| $16K | ﹤0.01% |
3,200
-1,800
| -36% | -$9.24K |
|
|
IMMP
7121
CALL
Immutep
IMMP
$56.1M
| $16K | ﹤0.01% |
9,800
-9,600
| -49% | -$17.7K |
|
7122
Inogen
INGN
$174M
| $16K | ﹤0.01% |
1,341
+774
| +137% | +$14.8K |
|
|
MTLS
7123
CALL
Materialise
MTLS
$366M
| $16K | ﹤0.01% |
2,000
-300
| -13% | -$2.69K |
|
|
MVO
7124
CALL
DELISTED
MV Oil Trust
MVO
| $16K | ﹤0.01% |
1,400
+200
| +17% | +$2.65K |
|
7125
PUT
Magnachip Semiconductor
MX
$110M
| $16K | ﹤0.01% |
1,800
+100
| +6% | +$990 |
|
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.