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 | |
|---|---|---|---|---|---|---|
5426
StepStone Group
STEP
$3.57B
| $79K | ﹤0.01% |
+3,265
| New | +$89.2K |
|
5427
PUT
TFS Financial
TFSL
$5.15B
| $79K | ﹤0.01% |
6,300
+5,000
| +385% | +$69.8K |
|
5428
CALL
Tecnoglass
TGLS
$1.93B
| $79K | ﹤0.01% |
1,900
+1,700
| +850% | +$60.9K |
|
5429
PUT
Trustmark
TRMK
$2.76B
| $79K | ﹤0.01% |
+3,200
| New | +$94.6K |
|
5430
CALL
TherapeuticsMD
TXMD
$23.5M
| $79K | ﹤0.01% |
21,200
-59,100
| -74% | -$284K |
|
5431
United Rentals
URI
$67.3B
| $79K | ﹤0.01% |
+201
| New | +$84.4K |
|
5432
PIMCO 25+ Year Zero Coupon US Treasury Index Exchange-Traded Fund
ZROZ
$1.3B
| $79K | ﹤0.01% |
834
+207
| +33% | +$19.4K |
|
|
DM
5433
CALL
DELISTED
Desktop Metal, Inc.
DM
| $79K | ﹤0.01% |
3,440
-4,450
| -56% | -$84K |
|
5434
CALL
Achieve Life Sciences
ACHV
$652M
| $78K | ﹤0.01% |
11,500
+6,700
| +140% | +$31.8K |
|
5435
PUT
Brookfield Infrastructure
BIPC
$5.17B
| $78K | ﹤0.01% |
+1,700
| New | +$74.1K |
|
5436
CALL
Bausch + Lomb
BLCO
$5.98B
| $78K | ﹤0.01% |
4,500
+4,000
| +800% | +$67.8K |
|
5437
PUT
ClearPoint Neuro
CLPT
$446M
| $78K | ﹤0.01% |
9,300
-100
| -1% | -$876 |
|
5438
CALL
Digimarc Corp
DMRC
$148M
| $78K | ﹤0.01% |
4,000
+3,400
| +567% | +$68.6K |
|
|
EVRI
5439
PUT
DELISTED
Everi Holdings
EVRI
| $78K | ﹤0.01% |
4,600
+2,800
| +156% | +$48.4K |
|
5440
Highwoods Properties
HIW
$3.66B
| $78K | ﹤0.01% |
3,380
+1,512
| +81% | +$40.7K |
|
5441
Kratos Defense & Security Solutions
KTOS
$8.67B
| $78K | ﹤0.01% |
5,794
+1,143
| +25% | +$13.6K |
|
5442
CALL
Maximus
MMS
$3.16B
| $78K | ﹤0.01% |
1,000
-22,400
| -96% | -$1.72M |
|
5443
CALL
Nexa Resources
NEXA
$1.7B
| $78K | ﹤0.01% |
12,500
+3,800
| +44% | +$24.6K |
|
|
UNIT
5444
CALL
Uniti Group
UNIT
$2.36B
| $78K | ﹤0.01% |
22,200
-23,900
| -52% | -$127K |
|
|
SBDS
5445
CALL
DELISTED
Solo Brands Inc
SBDS
| $78K | ﹤0.01% |
+275
| New | +$52.9K |
|
5446
Cimpress
CMPR
$2.35B
| $77K | ﹤0.01% |
+1,770
| New | +$60.4K |
|
|
CUK
5447
CALL
DELISTED
Carnival PLC
CUK
| $77K | ﹤0.01% |
8,500
+7,100
| +507% | +$66.4K |
|
5448
PUT
Eos Energy Enterprises
EOSE
$1.22B
| $77K | ﹤0.01% |
30,000
+23,800
| +384% | +$41.3K |
|
5449
Hilton Grand Vacations
HGV
$3.63B
| $77K | ﹤0.01% |
+1,740
| New | +$78.8K |
|
5450
CALL
Hillman Solutions
HLMN
$1.55B
| $77K | ﹤0.01% |
9,200
-43,200
| -82% | -$376K |
|
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.