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 | |
|---|---|---|---|---|---|---|
701
CALL
Eaton
ETN
$158B
| $15.1M | 0.01% |
88,000
-49,000
| -36% | -$8.16M |
|
702
General Mills
GIS
$19.7B
| $15.1M | 0.01% |
176,416
+19,929
| +13% | +$1.59M |
|
703
PUT
Boston Properties
BXP
$10.8B
| $15.1M | 0.01% |
278,300
+126,300
| +83% | +$8.24M |
|
704
CALL
Becton Dickinson
BDX
$42.2B
| $15M | 0.01% |
61,300
-25,700
| -30% | -$6.29M |
|
705
AT&T
T
$160B
| $15M | 0.01% |
777,321
-1,692,394
| -69% | -$32.3M |
|
706
CALL
KKR & Co
KKR
$85.8B
| $14.9M | 0.01% |
284,400
+182,600
| +179% | +$9.8M |
|
|
NVO
707
CALL
Novo Nordisk
NVO
$213B
| $14.9M | 0.01% |
187,400
-97,800
| -34% | -$6.94M |
|
708
CALL
Ferrari
RACE
$65.4B
| $14.9M | 0.01% |
54,900
+13,300
| +32% | +$3.4M |
|
709
PUT
Futu Holdings
FUTU
$14.9B
| $14.8M | 0.01% |
286,000
-181,800
| -39% | -$8.83M |
|
710
CALL
Clorox
CLX
$11.6B
| $14.8M | 0.01% |
93,700
+5,200
| +6% | +$780K |
|
711
PUT
Match Group
MTCH
$8.87B
| $14.8M | 0.01% |
385,800
+192,300
| +99% | +$8.39M |
|
|
712
CALL
Boston Properties
BXP
$10.8B
| $14.8M | 0.01% |
273,500
+24,100
| +10% | +$1.57M |
|
713
CALL
Steel Dynamics
STLD
$34.4B
| $14.8M | 0.01% |
130,700
-8,700
| -6% | -$1.01M |
|
714
CALL
United States Natural Gas Fund
UNG
$472M
| $14.8M | 0.01% |
532,125
+422,875
| +387% | +$15.4M |
|
715
CALL
CF Industries
CF
$19.6B
| $14.8M | 0.01% |
203,700
+59,800
| +42% | +$4.89M |
|
716
CALL
HCA Healthcare
HCA
$82.5B
| $14.8M | 0.01% |
56,000
-33,300
| -37% | -$8.46M |
|
717
PUT
Nutrien
NTR
$32.9B
| $14.8M | 0.01% |
199,800
-58,200
| -23% | -$4.49M |
|
718
CALL
NIO
NIO
$11.7B
| $14.7M | 0.01% |
1,402,300
-1,240,800
| -47% | -$12.7M |
|
719
Cigna
CI
$75.4B
| $14.7M | 0.01% |
+57,565
| New | +$16.8M |
|
720
CALL
Shift4
FOUR
$3.83B
| $14.7M | 0.01% |
193,400
+126,200
| +188% | +$8.13M |
|
721
PUT
Transocean
RIG
$5.87B
| $14.6M | 0.01% |
2,301,700
+283,400
| +14% | +$1.82M |
|
722
PUT
Upstart Holdings
UPST
$2.74B
| $14.6M | 0.01% |
920,500
-138,700
| -13% | -$2.33M |
|
723
PUT
AGNC Investment
AGNC
$12.5B
| $14.6M | 0.01% |
1,449,100
-9,200
| -0.6% | -$100K |
|
724
Accenture
ACN
$85.7B
| $14.6M | 0.01% |
51,079
+15,726
| +44% | +$4.29M |
|
725
CALL
Elevance Health
ELV
$84.4B
| $14.5M | 0.01% |
31,600
-9,300
| -23% | -$4.43M |
|
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.