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 | |
|---|---|---|---|---|---|---|
4376
Edgewell Personal Care
EPC
$1.31B
| $190K | ﹤0.01% |
+4,486
| New | +$188K |
|
4377
PUT
Funko
FNKO
$343M
| $190K | ﹤0.01% |
20,200
+1,300
| +7% | +$13.5K |
|
|
HAPN
4378
CALL
Happen Inc
HAPN
$2.12B
| $190K | ﹤0.01% |
26,400
-33,800
| -56% | -$301K |
|
4379
PUT
Mohawk Industries
MHK
$6.92B
| $190K | ﹤0.01% |
1,900
-20,500
| -92% | -$2.23M |
|
|
SAND
4380
DELISTED
Sandstorm Gold
SAND
| $190K | ﹤0.01% |
32,870
+27,697
| +535% | +$152K |
|
4381
Vicor
VICR
$8.26B
| $190K | ﹤0.01% |
+4,067
| New | +$226K |
|
4382
CALL
Dorman Products
DORM
$4.28B
| $189K | ﹤0.01% |
2,200
-500
| -19% | -$44.5K |
|
|
ESPR
4383
PUT
DELISTED
Esperion Therapeutics
ESPR
| $189K | ﹤0.01% |
118,900
-205,600
| -63% | -$1.06M |
|
4384
CALL
Fortuna Silver Mines
FSM
$2.48B
| $189K | ﹤0.01% |
49,500
-163,200
| -77% | -$580K |
|
4385
PUT
Lamar Advertising Co
LAMR
$16.6B
| $189K | ﹤0.01% |
1,900
-2,200
| -54% | -$223K |
|
4386
Nokia
NOK
$47.5B
| $189K | ﹤0.01% |
38,585
-108,872
| -74% | -$513K |
|
4387
CALL
Outfront Media
OUT
$5.77B
| $189K | ﹤0.01% |
11,887
+5,283
| +80% | +$92.5K |
|
4388
Invesco Golden Dragon China ETF
PGJ
$96.5M
| $189K | ﹤0.01% |
6,376
-5,739
| -47% | -$175K |
|
4389
PUT
Verra Mobility
VRRM
$796M
| $189K | ﹤0.01% |
11,200
+1,300
| +13% | +$20.8K |
|
4390
Cellebrite
CLBT
$3.69B
| $188K | ﹤0.01% |
30,945
-26,322
| -46% | -$143K |
|
4391
CALL
Cohu
COHU
$1.88B
| $188K | ﹤0.01% |
4,900
-600
| -11% | -$21.7K |
|
4392
CALL
Genesco
GCO
$417M
| $188K | ﹤0.01% |
5,100
+4,900
| +2,450% | +$215K |
|
4393
PUT
Griffon
GFF
$4.07B
| $188K | ﹤0.01% |
5,900
+3,800
| +181% | +$139K |
|
4394
PUT
Lazard
LAZ
$4.02B
| $188K | ﹤0.01% |
5,700
-215,800
| -97% | -$7.96M |
|
|
CALY
4395
PUT
Callaway Golf Company
CALY
$3.28B
| $188K | ﹤0.01% |
8,700
-7,600
| -47% | -$172K |
|
4396
CALL
Northeast Community Bancorp
NECB
$374M
| $188K | ﹤0.01% |
14,400
+4,400
| +44% | +$65.9K |
|
4397
CALL
Post Holdings
POST
$4.35B
| $188K | ﹤0.01% |
2,100
-7,100
| -77% | -$646K |
|
4398
PUT
Apple Hospitality REIT
APLE
$3.97B
| $187K | ﹤0.01% |
12,100
-15,600
| -56% | -$255K |
|
4399
CALL
Monro
MNRO
$442M
| $187K | ﹤0.01% |
+3,800
| New | +$189K |
|
|
MRSN
4400
DELISTED
Mersana Therapeutics
MRSN
| $187K | ﹤0.01% |
1,822
+1,698
| +1,369% | +$238K |
|
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.