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 | |
|---|---|---|---|---|---|---|
1501
CALL
Baker Hughes
BKR
$56.8B
| $3.61M | ﹤0.01% |
125,000
-41,800
| -25% | -$1.26M |
|
|
DENT
1502
CALL
DELISTED
AdvisorShares Dent Tactical ETF
DENT
| $3.61M | ﹤0.01% |
623,000
-579,100
| -48% | -$3.35M |
|
1503
CALL
Sociedad Química y Minera de Chile
SQM
$19.6B
| $3.6M | ﹤0.01% |
44,400
+29,700
| +202% | +$2.56M |
|
1504
PUT
Toyota
TM
$210B
| $3.58M | ﹤0.01% |
25,300
-39,000
| -61% | -$5.48M |
|
|
PRVB
1505
PUT
DELISTED
Provention Bio, Inc. Common Stock
PRVB
| $3.57M | ﹤0.01% |
148,300
+117,600
| +383% | +$1.48M |
|
1506
CALL
ALPS REIT Dividend Dogs ETF
RDOG
$11.6M
| $3.57M | ﹤0.01% |
92,400
-7,600
| -8% | -$298K |
|
1507
PUT
Darling Ingredients
DAR
$9.93B
| $3.57M | ﹤0.01% |
61,100
-32,900
| -35% | -$2.07M |
|
1508
Goodyear
GT
$2.07B
| $3.56M | ﹤0.01% |
323,032
+27,881
| +9% | +$309K |
|
1509
CALL
Hertz
HTZ
$572M
| $3.55M | ﹤0.01% |
218,000
-360,500
| -62% | -$6.29M |
|
1510
CALL
ATI
ATI
$27B
| $3.54M | ﹤0.01% |
89,700
-1,300
| -1% | -$49.1K |
|
1511
Southwest Airlines
LUV
$22B
| $3.53M | ﹤0.01% |
108,597
-111,940
| -51% | -$3.81M |
|
1512
CALL
Starwood Property Trust
STWD
$6.12B
| $3.53M | ﹤0.01% |
199,700
-95,300
| -32% | -$1.84M |
|
1513
CALL
ScottsMiracle-Gro
SMG
$4.03B
| $3.53M | ﹤0.01% |
50,600
-38,200
| -43% | -$2.75M |
|
1514
PUT
Liberty Media Series A
FWONA
$22.3B
| $3.51M | ﹤0.01% |
130,036
+4,073
| +3% | +$245K |
|
1515
PUT
International Paper
IP
$22.3B
| $3.5M | ﹤0.01% |
97,100
-13,000
| -12% | -$482K |
|
1516
Plug Power
PLUG
$2.92B
| $3.5M | ﹤0.01% |
+298,727
| New | +$4.27M |
|
1517
PUT
Schwab US Broad Market ETF
SCHB
$42.8B
| $3.5M | ﹤0.01% |
146,700
-22,800
| -13% | -$356K |
|
1518
CALL
Ball Corp
BALL
$17B
| $3.48M | ﹤0.01% |
63,200
-101,800
| -62% | -$5.66M |
|
1519
PUT
O'Reilly Automotive
ORLY
$72.4B
| $3.48M | ﹤0.01% |
61,500
-18,000
| -23% | -$986K |
|
1520
PUT
Public Storage
PSA
$60.2B
| $3.47M | ﹤0.01% |
11,500
+4,700
| +69% | +$1.38M |
|
|
GMS
1521
CALL
DELISTED
GMS Inc
GMS
| $3.47M | ﹤0.01% |
60,000
+59,100
| +6,567% | +$3.35M |
|
1522
Best Buy
BBY
$18B
| $3.47M | ﹤0.01% |
+44,316
| New | +$3.65M |
|
1523
CALL
Motorola Solutions
MSI
$69.4B
| $3.46M | ﹤0.01% |
12,100
-600
| -5% | -$158K |
|
1524
PUT
InMode
INMD
$872M
| $3.46M | ﹤0.01% |
108,300
+15,500
| +17% | +$531K |
|
1525
PUT
Organon & Co
OGN
$3.55B
| $3.46M | ﹤0.01% |
147,100
+116,400
| +379% | +$3.13M |
|
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.