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 | |
|---|---|---|---|---|---|---|
551
CALL
Edwards Lifesciences
EW
$48.6B
| $22M | 0.02% |
266,100
-4,500
| -2% | -$354K |
|
552
CALL
Cleveland-Cliffs
CLF
$5.39B
| $21.9M | 0.02% |
1,195,200
-140,600
| -11% | -$2.78M |
|
553
CALL
Air Products & Chemicals
APD
$66.1B
| $21.9M | 0.02% |
76,200
-16,400
| -18% | -$4.79M |
|
554
PUT
Darden Restaurants
DRI
$22.2B
| $21.7M | 0.02% |
140,000
-18,100
| -11% | -$2.68M |
|
555
PUT
Lennar Class A
LEN
$19.8B
| $21.7M | 0.02% |
212,901
-50,927
| -19% | -$4.92M |
|
556
CALL
Waste Management
WM
$94.9B
| $21.7M | 0.02% |
132,700
+25,300
| +24% | +$3.87M |
|
557
CALL
Atlassian
TEAM
$21.7B
| $21.6M | 0.02% |
126,000
-20,200
| -14% | -$3.22M |
|
558
CALL
Spectrum Brands
SPB
$2.05B
| $21.5M | 0.02% |
324,900
+135,000
| +71% | +$8.53M |
|
559
PUT
Bio-Rad Laboratories Class A
BIO
$8.19B
| $21.5M | 0.02% |
44,900
+30,600
| +214% | +$14.3M |
|
560
CALL
BILL Holdings
BILL
$4.17B
| $21.5M | 0.02% |
264,400
+112,500
| +74% | +$10.4M |
|
561
PUT
Vanguard FTSE Europe ETF
VGK
$30.2B
| $21.4M | 0.02% |
480,100
-227,600
| -32% | -$13.6M |
|
562
CALL
XPeng
XPEV
$12.3B
| $21.3M | 0.02% |
1,919,500
-397,500
| -17% | -$3.84M |
|
563
PUT
HCA Healthcare
HCA
$82.5B
| $21.3M | 0.02% |
80,700
-40,700
| -34% | -$10.3M |
|
564
CALL
Upstart Holdings
UPST
$2.74B
| $21.2M | 0.02% |
1,336,400
+63,100
| +5% | +$1.06M |
|
565
CALL
Hilton Worldwide
HLT
$73.8B
| $21.2M | 0.02% |
150,600
+2,400
| +2% | +$338K |
|
|
FRC
566
CALL
DELISTED
First Republic Bank
FRC
| $21.2M | 0.02% |
1,516,200
+1,481,100
| +4,220% | +$152M |
|
567
PUT
The Mosaic Company
MOS
$7.24B
| $21.2M | 0.02% |
462,300
-315,900
| -41% | -$15.3M |
|
|
568
PUT
Spectrum Brands
SPB
$2.05B
| $21.2M | 0.02% |
319,700
+263,600
| +470% | +$16.6M |
|
569
CALL
Southern Company
SO
$108B
| $21M | 0.02% |
302,300
+85,400
| +39% | +$5.75M |
|
570
CALL
Scorpio Tankers
STNG
$3.9B
| $21M | 0.02% |
372,700
+97,700
| +36% | +$5.34M |
|
571
PUT
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$254M
| $21M | 0.02% |
2,827,200
-791,200
| -22% | -$27M |
|
572
CALL
NetEase
NTES
$77.6B
| $20.7M | 0.02% |
234,000
+59,300
| +34% | +$5.11M |
|
573
CALL
Palantir
PLTR
$299B
| $20.6M | 0.02% |
2,442,900
-1,118,800
| -31% | -$8.76M |
|
574
PUT
Akamai
AKAM
$18.1B
| $20.6M | 0.02% |
263,400
+88,700
| +51% | +$7.18M |
|
575
CALL
Electronic Arts
EA
$52.4B
| $20.6M | 0.02% |
171,200
-189,800
| -53% | -$22.3M |
|
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.