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 | |
|---|---|---|---|---|---|---|
|
MTA
5151
PUT
Metalla Royalty & Streaming
MTA
$712M
| $100K | ﹤0.01% |
18,000
+14,800
| +463% | +$73.2K |
|
5152
CALL
Insight Enterprises
NSIT
$3.86B
| $100K | ﹤0.01% |
+700
| New | +$87.1K |
|
|
OLO
5153
CALL
DELISTED
Olo Inc
OLO
| $100K | ﹤0.01% |
12,300
+10,500
| +583% | +$80.8K |
|
|
ORGN
5154
PUT
DELISTED
Origin Materials
ORGN
| $100K | ﹤0.01% |
787
+454
| +136% | +$67K |
|
5155
PUT
Relay Therapeutics
RLAY
$4.24B
| $100K | ﹤0.01% |
+6,100
| New | +$109K |
|
5156
Safe Bulkers
SB
$810M
| $100K | ﹤0.01% |
27,334
-47,898
| -64% | -$161K |
|
5157
U-Haul Holding Co
UHAL
$13.9B
| $100K | ﹤0.01% |
+1,680
| New | +$106K |
|
5158
PUT
Global X S&P 500 Covered Call ETF
XYLD
$3.22B
| $100K | ﹤0.01% |
3,800
-1,200
| -24% | -$48.4K |
|
5159
Trump Media & Technology Group
DJT
$2.87B
| $100K | ﹤0.01% |
7,130
-72,383
| -91% | -$1.07M |
|
|
SLCA
5160
CALL
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $100K | ﹤0.01% |
8,400
-76,000
| -90% | -$904K |
|
5161
PUT
Avnet
AVT
$7.12B
| $99K | ﹤0.01% |
2,200
-4,100
| -65% | -$183K |
|
5162
PUT
Axalta
AXTA
$7.71B
| $99K | ﹤0.01% |
3,300
+2,000
| +154% | +$57.5K |
|
|
CMRC
5163
PUT
Commerce.com Inc Series 1
CMRC
$261M
| $99K | ﹤0.01% |
11,100
-5,800
| -34% | -$58.8K |
|
5164
CALL
Cabaletta Bio
CABA
$444M
| $99K | ﹤0.01% |
12,000
+2,700
| +29% | +$25.3K |
|
5165
CALL
Clean Harbors
CLH
$16.8B
| $99K | ﹤0.01% |
700
-900
| -56% | -$117K |
|
5166
Capital Southwest
CSWC
$1.47B
| $99K | ﹤0.01% |
5,616
+394
| +8% | +$7.25K |
|
5167
PUT
Focus Universal
FCUV
$1.32M
| $99K | ﹤0.01% |
99
+72
| +267% | +$104K |
|
5168
CALL
OneSpaWorld
OSW
$2.64B
| $99K | ﹤0.01% |
8,300
-19,800
| -70% | -$216K |
|
5169
Primerica
PRI
$10.1B
| $99K | ﹤0.01% |
575
+573
| +28,650% | +$93.9K |
|
5170
Resideo Technologies
REZI
$5.26B
| $99K | ﹤0.01% |
5,422
+4,421
| +442% | +$80K |
|
|
RCM
5171
PUT
DELISTED
R1 RCM Inc. Common Stock
RCM
| $99K | ﹤0.01% |
6,600
-12,500
| -65% | -$171K |
|
5172
CALL
Advanced Energy
AEIS
$11B
| $98K | ﹤0.01% |
1,000
-10,100
| -91% | -$951K |
|
5173
CALL
ICU Medical
ICUI
$4.21B
| $98K | ﹤0.01% |
600
+300
| +100% | +$51.6K |
|
5174
CALL
IPG Photonics
IPGP
$3.6B
| $98K | ﹤0.01% |
800
-300
| -27% | -$34.8K |
|
|
VRE
5175
DELISTED
Veris Residential
VRE
| $98K | ﹤0.01% |
6,746
-16,241
| -71% | -$259K |
|
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.