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 | |
|---|---|---|---|---|---|---|
2401
CALL
Applied Industrial Technologies
AIT
$12.8B
| $1.22M | ﹤0.01% |
8,600
+400
| +5% | +$54.2K |
|
2402
PUT
Corning
GLW
$126B
| $1.22M | ﹤0.01% |
34,600
-50,200
| -59% | -$1.75M |
|
|
HCP
2403
DELISTED
HashiCorp, Inc. Class A Common Stock
HCP
| $1.22M | ﹤0.01% |
41,644
-6,709
| -14% | -$200K |
|
2404
PUT
DigitalOcean
DOCN
$14.4B
| $1.22M | ﹤0.01% |
31,100
-134,200
| -81% | -$4.22M |
|
2405
CALL
Kulicke & Soffa
KLIC
$5.3B
| $1.22M | ﹤0.01% |
23,100
-12,900
| -36% | -$671K |
|
2406
PUT
Middleby
MIDD
$6.05B
| $1.22M | ﹤0.01% |
8,300
+3,200
| +63% | +$475K |
|
2407
CALL
BlackLine
BL
$1.69B
| $1.22M | ﹤0.01% |
18,100
+7,900
| +77% | +$545K |
|
2408
CALL
Lufax Holding
LU
$1.2B
| $1.22M | ﹤0.01% |
148,950
+21,300
| +17% | +$204K |
|
|
CERE
2409
PUT
DELISTED
Cerevel Therapeutics Holdings, Inc. Common Stock
CERE
| $1.21M | ﹤0.01% |
49,800
+45,400
| +1,032% | +$1.33M |
|
|
SWAV
2410
PUT
DELISTED
Shockwave Medical, Inc. Common Stock
SWAV
| $1.21M | ﹤0.01% |
5,600
+1,800
| +47% | +$351K |
|
|
LGF.B
2411
DELISTED
Lions Gate Entertainment Corp. Class B Non-Voting Shares
LGF.B
| $1.21M | ﹤0.01% |
116,906
+34,722
| +42% | +$295K |
|
2412
CALL
U-Haul Holding Co Series N
UHAL.B
$12.2B
| $1.21M | ﹤0.01% |
20,400
+3,400
| +20% | +$193K |
|
2413
CALL
FuelCell Energy
FCEL
$1.7B
| $1.21M | ﹤0.01% |
14,140
+353
| +3% | +$34.7K |
|
2414
PUT
Vanguard Short-Term Treasury ETF
VGSH
$29.3B
| $1.21M | ﹤0.01% |
19,000
+9,700
| +104% | +$563K |
|
2415
CALL
Franklin Resources
BEN
$16.9B
| $1.21M | ﹤0.01% |
44,800
+10,900
| +32% | +$318K |
|
2416
CALL
Joby Aviation
JOBY
$6.82B
| $1.21M | ﹤0.01% |
277,900
-300,000
| -52% | -$1.24M |
|
2417
PUT
Cal-Maine
CALM
$4.28B
| $1.21M | ﹤0.01% |
19,800
+1,200
| +6% | +$66.9K |
|
2418
CALL
Amplify Online Retail ETF
IBUY
$106M
| $1.21M | ﹤0.01% |
57,800
+11,700
| +25% | +$524K |
|
|
VRN
2419
CALL
DELISTED
Veren
VRN
| $1.21M | ﹤0.01% |
170,800
+31,300
| +22% | +$217K |
|
2420
CALL
AGCO
AGCO
$8.78B
| $1.2M | ﹤0.01% |
8,900
-14,700
| -62% | -$1.99M |
|
2421
CALL
AST SpaceMobile
ASTS
$16.8B
| $1.2M | ﹤0.01% |
236,900
+67,500
| +40% | +$389K |
|
2422
CALL
UWM Holdings
UWMC
$621M
| $1.2M | ﹤0.01% |
245,100
-233,200
| -49% | -$1.02M |
|
2423
Camtek
CAMT
$6.9B
| $1.2M | ﹤0.01% |
42,289
-6,187
| -13% | -$165K |
|
2424
PUT
Carrier Global
CARR
$57.2B
| $1.2M | ﹤0.01% |
26,200
+7,200
| +38% | +$322K |
|
2425
PUT
EVgo
EVGO
$200M
| $1.2M | ﹤0.01% |
153,900
+60,200
| +64% | +$354K |
|
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.