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 | |
|---|---|---|---|---|---|---|
3301
PUT
GoPro
GPRO
$119M
| $482K | ﹤0.01% |
95,900
-144,000
| -60% | -$777K |
|
|
TELL
3302
DELISTED
Tellurian Inc.
TELL
| $482K | ﹤0.01% |
391,973
+36,344
| +10% | +$57.9K |
|
3303
CALL
United States Copper Index Fund
CPER
$750M
| $481K | ﹤0.01% |
19,300
-52,800
| -73% | -$1.31M |
|
|
KYNB
3304
CALL
Kyntra Bio
KYNB
$28.5M
| $481K | ﹤0.01% |
1,032
+568
| +122% | +$301K |
|
3305
CALL
Gaotu Techedu
GOTU
$374M
| $481K | ﹤0.01% |
114,100
-72,700
| -39% | -$283K |
|
3306
CALL
Houlihan Lokey
HLI
$9.75B
| $481K | ﹤0.01% |
+5,500
| New | +$517K |
|
3307
CALL
Loews
L
$24.4B
| $481K | ﹤0.01% |
8,300
+1,400
| +20% | +$83K |
|
3308
CALL
Radian Group
RDN
$5.18B
| $481K | ﹤0.01% |
21,800
+20,800
| +2,080% | +$443K |
|
3309
CALL
Stratasys
SSYS
$700M
| $481K | ﹤0.01% |
29,100
-110,100
| -79% | -$1.55M |
|
|
WIRE
3310
CALL
DELISTED
Encore Wire Corp
WIRE
| $481K | ﹤0.01% |
2,600
-100
| -4% | -$17K |
|
3311
Cinemark Holdings
CNK
$3.93B
| $479K | ﹤0.01% |
+32,441
| New | +$394K |
|
3312
PUT
Allegiant Air
ALGT
$2.66B
| $478K | ﹤0.01% |
5,200
-3,600
| -41% | -$324K |
|
3313
CALL
Insulet
PODD
$11.4B
| $478K | ﹤0.01% |
1,500
+1,100
| +275% | +$326K |
|
3314
PUT
Companhia Siderúrgica Nacional
SID
$1.49B
| $478K | ﹤0.01% |
156,000
-139,300
| -47% | -$450K |
|
|
DICE
3315
PUT
DELISTED
DICE Therapeutics, Inc. Common Stock
DICE
| $478K | ﹤0.01% |
16,700
+800
| +5% | +$23.7K |
|
3316
PUT
Alkami Technology
ALKT
$1.9B
| $477K | ﹤0.01% |
+37,700
| New | +$556K |
|
|
TBCH
3317
Turtle Beach Corp
TBCH
$245M
| $477K | ﹤0.01% |
47,668
+6,409
| +16% | +$54.4K |
|
3318
CALL
Endava
DAVA
$147M
| $476K | ﹤0.01% |
7,100
+5,600
| +373% | +$440K |
|
|
PVBC
3319
CALL
DELISTED
Provident Bancorp
PVBC
| $476K | ﹤0.01% |
69,600
+5,700
| +9% | +$47.3K |
|
|
AIRC
3320
PUT
DELISTED
Apartment Income REIT Corp.
AIRC
| $476K | ﹤0.01% |
13,300
+6,200
| +87% | +$228K |
|
3321
PUT
Cooper-Standard Automotive
CPS
$508M
| $475K | ﹤0.01% |
33,400
-20,900
| -38% | -$305K |
|
3322
CALL
Opendoor
OPEN
$3.71B
| $475K | ﹤0.01% |
279,310
-1,120,753
| -80% | -$1.85M |
|
3323
Biomea Fusion
BMEA
$91.1M
| $474K | ﹤0.01% |
+15,299
| New | +$190K |
|
3324
CALL
inTEST
INTT
$171M
| $474K | ﹤0.01% |
22,900
+22,000
| +2,444% | +$330K |
|
3325
CALL
ARKO Corp
ARKO
$897M
| $472K | ﹤0.01% |
55,700
+21,700
| +64% | +$181K |
|
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.