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 | |
|---|---|---|---|---|---|---|
4676
PUT
PetMed Express
PETS
$42.3M
| $149K | ﹤0.01% |
9,200
+5,600
| +156% | +$105K |
|
4677
Global X US Preferred ETF
PFFD
$2.13B
| $149K | ﹤0.01% |
7,503
+609
| +9% | +$12.5K |
|
4678
CALL
Xeris Biopharma Holdings
XERS
$1.45B
| $149K | ﹤0.01% |
92,000
-103,500
| -53% | -$130K |
|
4679
CALL
XPEL
XPEL
$1.22B
| $149K | ﹤0.01% |
2,200
+300
| +16% | +$21.2K |
|
4680
PUT
Astec Industries
ASTE
$1.17B
| $148K | ﹤0.01% |
3,600
-1,100
| -23% | -$46.4K |
|
4681
CALL
Ethan Allen Interiors
ETD
$600M
| $148K | ﹤0.01% |
5,400
-800
| -13% | -$22.7K |
|
|
MITT
4682
TPG Mortgage Investment Trust
MITT
$228M
| $148K | ﹤0.01% |
25,850
+279
| +1% | +$1.69K |
|
4683
CALL
PDS Biotechnology
PDSB
$37.4M
| $148K | ﹤0.01% |
24,100
-78,700
| -77% | -$644K |
|
|
SUPV
4684
PUT
Grupo Supervielle
SUPV
$823M
| $148K | ﹤0.01% |
66,100
+65,600
| +13,120% | +$170K |
|
4685
CALL
Cactus
WHD
$3.63B
| $148K | ﹤0.01% |
3,600
-3,100
| -46% | -$150K |
|
4686
PUT
Ziff Davis
ZD
$2B
| $148K | ﹤0.01% |
+1,900
| New | +$156K |
|
4687
PUT
Asbury Automotive
ABG
$4.62B
| $147K | ﹤0.01% |
700
+500
| +250% | +$106K |
|
4688
CALL
Fulton Financial
FULT
$4.68B
| $147K | ﹤0.01% |
10,700
+3,600
| +51% | +$58.2K |
|
4689
PUT
Liberty Broadband Class C
LBRDK
$4.89B
| $147K | ﹤0.01% |
1,800
-3,900
| -68% | -$337K |
|
4690
PUT
Pitney Bowes
PBI
$2.39B
| $147K | ﹤0.01% |
37,900
-18,100
| -32% | -$76K |
|
4691
PUT
Banco Santander
SAN
$191B
| $147K | ﹤0.01% |
40,100
-347,500
| -90% | -$1.24M |
|
|
MTTR
4692
DELISTED
Matterport, Inc. Class A Common Stock
MTTR
| $147K | ﹤0.01% |
53,911
+53,781
| +41,370% | +$164K |
|
|
STER
4693
PUT
DELISTED
Sterling Check Corp. Common Stock
STER
| $147K | ﹤0.01% |
13,200
+900
| +7% | +$11.8K |
|
|
DMTK
4694
PUT
DELISTED
DermTech, Inc. Common Stock
DMTK
| $147K | ﹤0.01% |
40,000
+21,100
| +112% | +$88.9K |
|
|
EXPR
4695
CALL
DELISTED
Express, Inc.
EXPR
| $147K | ﹤0.01% |
9,330
-9,440
| -50% | -$191K |
|
4696
PUT
Extra Space Storage
EXR
$32.3B
| $146K | ﹤0.01% |
900
+100
| +13% | +$15.7K |
|
4697
Fidelity MSCI Energy Index ETF
FENY
$1.97B
| $146K | ﹤0.01% |
6,515
+670
| +11% | +$15.6K |
|
4698
PUT
FMC
FMC
$1.25B
| $146K | ﹤0.01% |
1,200
-3,200
| -73% | -$403K |
|
|
PLYA
4699
DELISTED
Playa Hotels & Resorts
PLYA
| $146K | ﹤0.01% |
15,286
-6,597
| -30% | -$52.6K |
|
4700
CALL
Rollins
ROL
$18.6B
| $146K | ﹤0.01% |
3,900
+2,200
| +129% | +$79.4K |
|
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.