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 | |
|---|---|---|---|---|---|---|
1426
Dominion Energy
D
$62.5B
| $4.15M | ﹤0.01% |
74,315
-53,446
| -42% | -$3.13M |
|
1427
PUT
Yum China
YUMC
$14.9B
| $4.14M | ﹤0.01% |
65,400
+5,800
| +10% | +$350K |
|
1428
PUT
PennyMac Financial
PFSI
$4.38B
| $4.14M | ﹤0.01% |
69,500
+21,500
| +45% | +$1.33M |
|
1429
PUT
Crown Castle
CCI
$32.7B
| $4.13M | ﹤0.01% |
30,900
-27,000
| -47% | -$3.73M |
|
1430
PUT
Allstate
ALL
$66.9B
| $4.12M | ﹤0.01% |
37,200
+3,800
| +11% | +$480K |
|
1431
CALL
A.O. Smith
AOS
$8.38B
| $4.12M | ﹤0.01% |
59,600
-18,800
| -24% | -$1.22M |
|
1432
PUT
Cboe Global Markets
CBOE
$29.8B
| $4.12M | ﹤0.01% |
30,700
-75,100
| -71% | -$9.43M |
|
|
COOP
1433
PUT
DELISTED
Mr. Cooper
COOP
| $4.11M | ﹤0.01% |
100,300
+73,000
| +267% | +$3.2M |
|
1434
CALL
Carlyle Group
CG
$16.3B
| $4.09M | ﹤0.01% |
131,800
-133,700
| -50% | -$4.46M |
|
1435
CALL
Coty
COTY
$2.33B
| $4.09M | ﹤0.01% |
339,300
+3,700
| +1% | +$39.2K |
|
1436
PUT
Yum! Brands
YUM
$41B
| $4.08M | ﹤0.01% |
30,900
+9,000
| +41% | +$1.16M |
|
1437
Manchester United
MANU
$3.91B
| $4.07M | ﹤0.01% |
183,908
+183,768
| +131,263% | +$4.17M |
|
|
RCM
1438
CALL
DELISTED
R1 RCM Inc. Common Stock
RCM
| $4.07M | ﹤0.01% |
271,400
+170,400
| +169% | +$2.33M |
|
1439
CALL
Icahn Enterprises
IEP
$5.17B
| $4.06M | ﹤0.01% |
78,600
+32,800
| +72% | +$1.73M |
|
1440
PUT
Alcon
ALC
$33.1B
| $4.06M | ﹤0.01% |
57,600
-11,300
| -16% | -$804K |
|
1441
CALL
Lincoln National
LNC
$7.91B
| $4.06M | ﹤0.01% |
180,800
-13,100
| -7% | -$389K |
|
1442
CALL
Avantor
AVTR
$7.81B
| $4.04M | ﹤0.01% |
191,200
+105,500
| +123% | +$2.4M |
|
|
TGI
1443
CALL
DELISTED
Triumph Group
TGI
| $4.04M | ﹤0.01% |
348,500
+195,800
| +128% | +$2.23M |
|
1444
CALL
CRISPR Therapeutics
CRSP
$4.58B
| $4.03M | ﹤0.01% |
89,200
-88,900
| -50% | -$4.32M |
|
1445
American Express
AXP
$223B
| $4.02M | ﹤0.01% |
+24,372
| New | +$4.04M |
|
1446
PUT
ChargePoint
CHPT
$133M
| $4.01M | ﹤0.01% |
19,160
-1,105
| -5% | -$241K |
|
1447
PUT
Credit Acceptance
CACC
$6B
| $4.01M | ﹤0.01% |
9,200
+4,200
| +84% | +$1.85M |
|
1448
CALL
Lumen
LUMN
$6.53B
| $4.01M | ﹤0.01% |
1,511,700
-1,307,300
| -46% | -$5.27M |
|
1449
PUT
State Street
STT
$50.9B
| $3.99M | ﹤0.01% |
52,700
-39,500
| -43% | -$3.33M |
|
|
SKX
1450
CALL
DELISTED
Skechers
SKX
| $3.97M | ﹤0.01% |
83,500
+41,200
| +97% | +$1.87M |
|
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.