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 | |
|---|---|---|---|---|---|---|
5226
Global X MSCI China Consumer Discretionary ETF
CHIQ
$131M
| $93K | ﹤0.01% |
+4,647
| New | +$98.3K |
|
5227
Camden Property Trust
CPT
$11.2B
| $93K | ﹤0.01% |
+888
| New | +$101K |
|
5228
iShares MSCI Hong Kong ETF
EWH
$1.25B
| $93K | ﹤0.01% |
4,566
-7,703
| -63% | -$164K |
|
|
HYFT
5229
CALL
MindWalk Holdings
HYFT
$63.4M
| $93K | ﹤0.01% |
33,900
-24,600
| -42% | -$102K |
|
5230
PUT
Oceaneering
OII
$4.74B
| $93K | ﹤0.01% |
5,300
-1,000
| -16% | -$19.3K |
|
5231
CALL
Riskified
RSKD
$701M
| $93K | ﹤0.01% |
16,500
+13,100
| +385% | +$72.7K |
|
|
SA
5232
Seabridge Gold
SA
$2.89B
| $93K | ﹤0.01% |
7,224
+3,159
| +78% | +$39.1K |
|
5233
PUT
Sun Life Financial
SLF
$45.9B
| $93K | ﹤0.01% |
+2,000
| New | +$96.3K |
|
|
CPUH
5234
CALL
DELISTED
Compute Health Acquisition Corp.
CPUH
| $93K | ﹤0.01% |
9,100
+3,500
| +63% | +$35.8K |
|
5235
PUT
Booz Allen Hamilton
BAH
$8.22B
| $92K | ﹤0.01% |
1,000
-800
| -44% | -$75.9K |
|
5236
CALL
Core Laboratories
CLB
$477M
| $92K | ﹤0.01% |
4,200
-2,100
| -33% | -$49.1K |
|
5237
PUT
DXC Technology
DXC
$1.82B
| $92K | ﹤0.01% |
3,600
-32,000
| -90% | -$872K |
|
5238
CALL
Federated Hermes
FHI
$4.51B
| $92K | ﹤0.01% |
2,300
+700
| +44% | +$27.5K |
|
5239
Genius Sports
GENI
$1.87B
| $92K | ﹤0.01% |
18,666
-66,871
| -78% | -$314K |
|
5240
CALL
Iovance Biotherapeutics
IOVA
$2.09B
| $92K | ﹤0.01% |
15,200
-163,500
| -91% | -$1.13M |
|
5241
O-I Glass
OI
$1.13B
| $92K | ﹤0.01% |
4,082
+3,696
| +958% | +$77.6K |
|
5242
Pilgrim's Pride
PPC
$6.99B
| $92K | ﹤0.01% |
3,979
-9,479
| -70% | -$229K |
|
5243
CALL
Sylvamo
SLVM
$1.49B
| $92K | ﹤0.01% |
2,000
-700
| -26% | -$33.2K |
|
5244
Vanguard Total International Stock ETF
VXUS
$155B
| $92K | ﹤0.01% |
1,673
-927
| -36% | -$50.7K |
|
|
BLU
5245
PUT
DELISTED
BELLUS Health Inc.
BLU
| $92K | ﹤0.01% |
12,900
+7,900
| +158% | +$61.3K |
|
|
CSII
5246
DELISTED
Cardiovascular Systems, Inc.
CSII
| $92K | ﹤0.01% |
4,639
+4,160
| +868% | +$71.8K |
|
5247
PUT
Boot Barn
BOOT
$4.68B
| $91K | ﹤0.01% |
1,200
-100
| -8% | -$7.67K |
|
5248
CALL
Center Bancorp
CNOB
$1.66B
| $91K | ﹤0.01% |
+5,200
| New | +$118K |
|
5249
PUT
Global Net Lease
GNL
$1.86B
| $91K | ﹤0.01% |
7,100
-5,000
| -41% | -$68.7K |
|
5250
Kodak
KODK
$819M
| $91K | ﹤0.01% |
+22,338
| New | +$80.6K |
|
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.