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 | |
|---|---|---|---|---|---|---|
3101
CALL
BigBear.ai
BBAI
$1.36B
| $588K | ﹤0.01% |
241,200
+234,800
| +3,669% | +$626K |
|
|
DEA
3102
CALL
Easterly Government Properties
DEA
$1.19B
| $588K | ﹤0.01% |
17,120
+7,720
| +82% | +$289K |
|
3103
PUT
dLocal
DLO
$4.41B
| $587K | ﹤0.01% |
36,200
-87,800
| -71% | -$1.38M |
|
3104
PUT
Hess Midstream
HESM
$5.11B
| $587K | ﹤0.01% |
20,300
+13,200
| +186% | +$384K |
|
3105
PUT
Jack Henry & Associates
JKHY
$10.9B
| $587K | ﹤0.01% |
+3,900
| New | +$651K |
|
3106
PUT
Levi Strauss
LEVI
$9.71B
| $587K | ﹤0.01% |
32,200
-51,400
| -61% | -$883K |
|
3107
PUT
Trinity Capital
TRIN
$1.57B
| $585K | ﹤0.01% |
46,000
+43,800
| +1,991% | +$574K |
|
|
BGFV
3108
CALL
DELISTED
Big 5 Sporting Goods
BGFV
| $584K | ﹤0.01% |
76,000
+29,400
| +63% | +$266K |
|
3109
State Street SPDR S&P Bank ETF
KBE
$1.65B
| $583K | ﹤0.01% |
+15,731
| New | +$707K |
|
3110
Polestar Automotive Holding UK
PSNY
$2.08B
| $583K | ﹤0.01% |
5,135
+3,239
| +171% | +$492K |
|
3111
Airbnb
ABNB
$86.5B
| $582K | ﹤0.01% |
4,683
-115,945
| -96% | -$13.2M |
|
|
AKRO
3112
PUT
DELISTED
Akero Therapeutics
AKRO
| $581K | ﹤0.01% |
15,200
-31,100
| -67% | -$1.39M |
|
3113
Box
BOX
$4.17B
| $580K | ﹤0.01% |
21,658
-11,767
| -35% | -$355K |
|
3114
CALL
Carriage Services
CSV
$634M
| $579K | ﹤0.01% |
19,000
+17,000
| +850% | +$539K |
|
3115
CALL
Magnolia Oil & Gas
MGY
$5.7B
| $579K | ﹤0.01% |
26,500
+18,800
| +244% | +$417K |
|
3116
CALL
Microvision
MVIS
$84.2M
| $579K | ﹤0.01% |
216,900
-565,900
| -72% | -$1.43M |
|
3117
PUT
Alta Equipment Group
ALTG
$209M
| $578K | ﹤0.01% |
36,500
-53,100
| -59% | -$891K |
|
3118
PUT
CryoPort
CYRX
$754M
| $578K | ﹤0.01% |
24,100
+24,000
| +24,000% | +$522K |
|
3119
VanEck High Yield Muni ETF
HYD
$4.46B
| $578K | ﹤0.01% |
11,190
-3,230
| -22% | -$167K |
|
3120
CALL
Taboola.com
TBLA
$1.36B
| $578K | ﹤0.01% |
212,600
+200,500
| +1,657% | +$676K |
|
3121
PUT
Boyd Gaming
BYD
$6.6B
| $577K | ﹤0.01% |
9,000
-154,400
| -94% | -$9.56M |
|
3122
PUT
Galicia Financial Group
GGAL
$8.06B
| $577K | ﹤0.01% |
52,600
+41,800
| +387% | +$517K |
|
3123
Post Holdings
POST
$4.16B
| $575K | ﹤0.01% |
6,399
+5,962
| +1,364% | +$542K |
|
3124
CALL
Ring Energy
REI
$302M
| $575K | ﹤0.01% |
302,900
+157,600
| +108% | +$340K |
|
3125
Direxion Daily Semiconductor Bear 3X ETF
SOXS
$2.02B
| $575K | ﹤0.01% |
+18
| New | +$833K |
|
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.