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 | |
|---|---|---|---|---|---|---|
476
CALL
Suncor Energy
SU
$76.4B
| $26.5M | 0.02% |
853,800
+90,300
| +12% | +$2.94M |
|
477
CALL
Zillow
Z
$7.18B
| $26.5M | 0.02% |
596,400
-421,300
| -41% | -$17.9M |
|
478
CALL
Super Micro Computer
SMCI
$19.8B
| $26.4M | 0.02% |
2,478,000
+1,486,000
| +150% | +$13.4M |
|
479
CALL
Chewy
CHWY
$8.81B
| $26.4M | 0.02% |
705,300
+177,400
| +34% | +$7.34M |
|
|
SPLK
480
CALL
DELISTED
Splunk Inc
SPLK
| $26.3M | 0.02% |
274,500
-319,300
| -54% | -$30.6M |
|
481
CALL
Autodesk
ADSK
$43B
| $26.3M | 0.02% |
126,200
-24,500
| -16% | -$5.04M |
|
482
CALL
Unity
U
$12.8B
| $26.2M | 0.02% |
809,000
-90,800
| -10% | -$2.92M |
|
483
Intuit
INTU
$77.8B
| $26.2M | 0.02% |
58,845
+49,010
| +498% | +$20.1M |
|
484
CALL
Rio Tinto
RIO
$150B
| $26.2M | 0.02% |
382,400
-267,400
| -41% | -$19.4M |
|
485
JD.com
JD
$40.7B
| $26.1M | 0.02% |
+594,625
| New | +$30.7M |
|
486
CALL
Deere & Co
DE
$164B
| $26.1M | 0.02% |
63,100
-136,300
| -68% | -$56.4M |
|
487
PUT
Analog Devices
ADI
$188B
| $26M | 0.02% |
131,900
-163,800
| -55% | -$29.4M |
|
|
WBA
488
PUT
DELISTED
Walgreens Boots Alliance
WBA
| $26M | 0.02% |
750,800
+139,200
| +23% | +$4.94M |
|
489
PUT
Cheniere Energy
LNG
$56B
| $25.8M | 0.02% |
163,600
-56,200
| -26% | -$8.49M |
|
490
CALL
Warner Bros
WBD
$64.8B
| $25.7M | 0.02% |
1,704,000
+8,100
| +0.5% | +$115K |
|
491
PUT
Medtronic
MDT
$105B
| $25.6M | 0.02% |
317,100
-187,900
| -37% | -$15.3M |
|
492
CALL
Etsy
ETSY
$7.64B
| $25.5M | 0.02% |
228,700
-110,300
| -33% | -$13.7M |
|
493
PUT
Burlington
BURL
$22.3B
| $25.4M | 0.02% |
125,900
-19,800
| -14% | -$4.33M |
|
494
CALL
Align Technology
ALGN
$12.4B
| $25.4M | 0.02% |
76,100
-35,700
| -32% | -$10.5M |
|
495
PUT
Southwest Airlines
LUV
$23.3B
| $25.4M | 0.02% |
780,400
+44,700
| +6% | +$1.52M |
|
496
CALL
Moody's
MCO
$85.5B
| $25.3M | 0.02% |
82,800
+80,800
| +4,040% | +$24.4M |
|
497
CALL
Norwegian Cruise Line
NCLH
$8.87B
| $25.3M | 0.02% |
1,880,300
-177,300
| -9% | -$2.65M |
|
498
CALL
Take-Two Interactive
TTWO
$43.4B
| $25.3M | 0.02% |
211,800
-337,200
| -61% | -$37.6M |
|
|
SHNY
499
CALL
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $25.2M | 0.02% |
1,392,100
-270,700
| -16% | -$4.91M |
|
500
CALL
Estee Lauder
EL
$29.9B
| $25.2M | 0.02% |
102,100
-1,300
| -1% | -$330K |
|
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.