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 | |
|---|---|---|---|---|---|---|
|
PDS
3651
PUT
Precision Drilling
PDS
$1.04B
| $349K | ﹤0.01% |
6,800
-3,600
| -35% | -$233K |
|
3652
PUT
Ardelyx
ARDX
$1.25B
| $348K | ﹤0.01% |
72,800
-195,000
| -73% | -$658K |
|
|
CVGW
3653
DELISTED
Calavo Growers
CVGW
| $348K | ﹤0.01% |
12,113
+11,813
| +3,938% | +$354K |
|
|
HAPN
3654
PUT
Happen Inc
HAPN
$2.16B
| $348K | ﹤0.01% |
48,400
-42,200
| -47% | -$376K |
|
3655
CALL
Lear
LEA
$7.26B
| $348K | ﹤0.01% |
2,500
-11,600
| -82% | -$1.6M |
|
3656
CALL
LiveWire
LVWR
$498M
| $348K | ﹤0.01% |
54,100
+1,200
| +2% | +$7.74K |
|
3657
PUT
Arcus Biosciences
RCUS
$3.5B
| $348K | ﹤0.01% |
19,100
+3,500
| +22% | +$66.9K |
|
|
CHGX
3658
PUT
DELISTED
AXS Change Finance ESG ETF
CHGX
| $348K | ﹤0.01% |
8,400
-10,100
| -55% | -$285K |
|
|
DRRX
3659
PUT
DELISTED
DURECT Corp
DRRX
| $347K | ﹤0.01% |
76,800
+74,700
| +3,557% | +$406K |
|
3660
CALL
Wolverine World Wide
WWW
$1.56B
| $347K | ﹤0.01% |
20,400
+10,400
| +104% | +$159K |
|
|
CBAY
3661
PUT
DELISTED
Cymabay Therapeutics
CBAY
| $347K | ﹤0.01% |
39,900
+24,700
| +163% | +$198K |
|
3662
PUT
AerSale
ASLE
$307M
| $346K | ﹤0.01% |
20,100
+100
| +0.5% | +$1.78K |
|
|
CVAC
3663
PUT
DELISTED
CureVac
CVAC
| $346K | ﹤0.01% |
49,700
+20,400
| +70% | +$178K |
|
3664
GameStop
GME
$9.66B
| $346K | ﹤0.01% |
15,055
+13,655
| +975% | +$272K |
|
3665
CALL
Groupon
GRPN
$1.05B
| $346K | ﹤0.01% |
82,300
-33,100
| -29% | -$229K |
|
3666
PUT
Insmed
INSM
$22.7B
| $346K | ﹤0.01% |
20,300
+18,900
| +1,350% | +$367K |
|
3667
PUT
Mueller Industries
MLI
$14.2B
| $345K | ﹤0.01% |
18,800
+18,400
| +4,600% | +$321K |
|
3668
CALL
MINISO
MNSO
$3.72B
| $345K | ﹤0.01% |
19,500
-19,600
| -50% | -$316K |
|
3669
Direxion Daily Aerospace & Defense Bull 3X ETF
DFEN
$408M
| $343K | ﹤0.01% |
16,466
+15,866
| +2,644% | +$326K |
|
3670
CALL
BuzzFeed
BZFD
$94.1M
| $342K | ﹤0.01% |
+75,700
| New | +$430K |
|
3671
PUT
Fidelity National Financial
FNF
$14B
| $342K | ﹤0.01% |
9,800
-15,200
| -61% | -$598K |
|
3672
CALL
Harmony Biosciences
HRMY
$2.08B
| $342K | ﹤0.01% |
10,500
+10,100
| +2,525% | +$460K |
|
3673
CALL
Mattel
MAT
$4.3B
| $342K | ﹤0.01% |
18,600
-118,800
| -86% | -$2.21M |
|
3674
CALL
Future Fuel
FF
$203M
| $341K | ﹤0.01% |
46,300
-14,000
| -23% | -$120K |
|
3675
CALL
Globe Life
GL
$13.5B
| $341K | ﹤0.01% |
3,100
+1,500
| +94% | +$176K |
|
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.