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 | |
|---|---|---|---|---|---|---|
351
CALL
Altria Group
MO
$121B
| $37.7M | 0.03% |
845,800
-146,700
| -15% | -$6.74M |
|
352
PUT
Datadog
DDOG
$87.5B
| $37.6M | 0.03% |
517,700
+106,900
| +26% | +$7.85M |
|
353
CALL
Newmont
NEM
$102B
| $37.6M | 0.03% |
766,700
-331,500
| -30% | -$16.1M |
|
354
PUT
Northrop Grumman
NOC
$74.6B
| $37.4M | 0.03% |
80,900
+16,000
| +25% | +$7.42M |
|
355
PUT
Constellation Brands
STZ
$22.6B
| $37.3M | 0.03% |
165,100
+25,000
| +18% | +$5.56M |
|
356
PUT
Generac Holdings
GNRC
$12.6B
| $37M | 0.03% |
342,300
+197,400
| +136% | +$22.8M |
|
357
PUT
DraftKings
DKNG
$11.3B
| $37M | 0.03% |
1,909,200
-1,341,000
| -41% | -$22.3M |
|
358
CALL
Strategy Inc
MSTR
$36.3B
| $36.8M | 0.03% |
1,260,000
-1,337,000
| -51% | -$32.6M |
|
359
CALL
Zscaler
ZS
$23B
| $36.5M | 0.03% |
312,000
-63,100
| -17% | -$7.57M |
|
360
CALL
Carnival Corporation Ltd
CCL
$35.7B
| $36.4M | 0.03% |
3,591,000
-205,100
| -5% | -$2.12M |
|
361
PUT
AutoZone
AZO
$48.5B
| $36.4M | 0.03% |
14,800
-2,600
| -15% | -$6.34M |
|
362
CALL
Shell
SHEL
$243B
| $36.4M | 0.03% |
632,200
+239,100
| +61% | +$14.1M |
|
|
HES
363
PUT
DELISTED
Hess
HES
| $36.4M | 0.03% |
274,700
+130,700
| +91% | +$18.2M |
|
364
CALL
GameStop
GME
$9.69B
| $36.2M | 0.03% |
1,574,600
+214,100
| +16% | +$4.26M |
|
365
CALL
Novartis
NVS
$292B
| $36.2M | 0.03% |
393,300
-199,500
| -34% | -$17.4M |
|
366
PUT
Mercado Libre
MELI
$91.2B
| $36.1M | 0.03% |
27,400
-11,100
| -29% | -$12.6M |
|
367
PUT
EQT Corp
EQT
$33.8B
| $36.1M | 0.03% |
1,129,900
-30,100
| -3% | -$966K |
|
368
CALL
Humana
HUM
$47.7B
| $35.8M | 0.03% |
73,800
+23,000
| +45% | +$11.4M |
|
369
CALL
Arista Networks
ANET
$220B
| $35.3M | 0.03% |
842,000
+458,800
| +120% | +$15.8M |
|
|
370
CALL
EQT Corp
EQT
$33.8B
| $35.3M | 0.03% |
1,106,400
+652,500
| +144% | +$20.9M |
|
371
CALL
Domino's
DPZ
$10.6B
| $35.3M | 0.03% |
107,000
+30,500
| +40% | +$10.2M |
|
372
CALL
Nucor
NUE
$53.7B
| $35.1M | 0.03% |
227,300
+76,500
| +51% | +$12.2M |
|
373
PUT
Teck Resources
TECK
$28B
| $35.1M | 0.03% |
961,200
+130,400
| +16% | +$5.18M |
|
374
CALL
Franco-Nevada
FNV
$41.3B
| $34.9M | 0.03% |
239,400
+99,800
| +71% | +$13.9M |
|
375
CALL
ProShares UltraShort Health Care
RXD
$3.38M
| $34.9M | 0.03% |
861,350
-139,850
| -14% | -$3.59M |
|
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.