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 | |
|---|---|---|---|---|---|---|
851
PUT
Celsius Holdings
CELH
$6.98B
| $10.9M | 0.01% |
351,000
-263,400
| -43% | -$8.31M |
|
852
CALL
Manchester United
MANU
$3.86B
| $10.9M | 0.01% |
490,500
-87,600
| -15% | -$1.99M |
|
853
PUT
Campbell Soup
CPB
$6.41B
| $10.8M | 0.01% |
196,800
-130,900
| -40% | -$6.95M |
|
854
CALL
Allstate
ALL
$65.4B
| $10.8M | 0.01% |
97,500
+52,500
| +117% | +$6.64M |
|
|
DAY
855
CALL
DELISTED
Dayforce
DAY
| $10.8M | 0.01% |
147,000
+142,800
| +3,400% | +$10.1M |
|
856
AbbVie
ABBV
$453B
| $10.8M | 0.01% |
67,526
+52,483
| +349% | +$8.02M |
|
857
PUT
Lithia Motors
LAD
$7.67B
| $10.8M | 0.01% |
47,000
-27,500
| -37% | -$6.69M |
|
858
PUT
BridgeBio Pharma
BBIO
$16.2B
| $10.8M | 0.01% |
648,600
+640,500
| +7,907% | +$7.47M |
|
859
CALL
Crown Castle
CCI
$33B
| $10.7M | 0.01% |
80,100
-14,700
| -16% | -$2.03M |
|
860
PUT
AutoNation
AN
$6.87B
| $10.7M | 0.01% |
79,600
-6,800
| -8% | -$873K |
|
861
CALL
Lamb Weston
LW
$6.67B
| $10.7M | 0.01% |
102,300
-8,300
| -8% | -$821K |
|
862
CVS Health
CVS
$136B
| $10.7M | 0.01% |
143,700
+123,280
| +604% | +$10.3M |
|
863
PUT
PG&E
PCG
$39.2B
| $10.7M | 0.01% |
658,900
-60,900
| -8% | -$962K |
|
864
PUT
EPAM Systems
EPAM
$4.47B
| $10.6M | 0.01% |
35,500
+15,000
| +73% | +$4.83M |
|
|
LSI
865
DELISTED
Life Storage, Inc.
LSI
| $10.6M | 0.01% |
+80,608
| New | +$9.32M |
|
866
CALL
Zoetis
ZTS
$31B
| $10.6M | 0.01% |
63,400
-15,600
| -20% | -$2.56M |
|
867
PUT
Affirm
AFRM
$23.9B
| $10.5M | 0.01% |
936,000
-101,500
| -10% | -$1.28M |
|
868
CALL
Cirrus Logic
CRUS
$6.68B
| $10.5M | 0.01% |
96,100
+92,000
| +2,244% | +$8.96M |
|
869
CALL
Nice
NICE
$5.07B
| $10.5M | 0.01% |
45,900
+28,700
| +167% | +$6.03M |
|
870
CALL
GSK
GSK
$101B
| $10.5M | 0.01% |
330,100
-269,100
| -45% | -$9.41M |
|
|
BNY
871
CALL
Bank of New York Mellon
BNY
$108B
| $10.5M | 0.01% |
230,900
+88,000
| +62% | +$4.27M |
|
872
PUT
Zebra Technologies
ZBRA
$12.3B
| $10.5M | 0.01% |
32,900
+400
| +1% | +$121K |
|
873
PUT
UBS Group
UBS
$170B
| $10.5M | 0.01% |
490,000
+459,900
| +1,528% | +$9.59M |
|
874
CALL
Freshpet
FRPT
$2.82B
| $10.4M | 0.01% |
157,600
+71,700
| +83% | +$4.4M |
|
875
PUT
WIX.com
WIX
$2.04B
| $10.4M | 0.01% |
104,500
+40,800
| +64% | +$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.