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 | |
|---|---|---|---|---|---|---|
|
ETNB
3726
CALL
DELISTED
89bio
ETNB
| $328K | ﹤0.01% |
21,600
-29,000
| -57% | -$378K |
|
3727
Teradata
TDC
$2.82B
| $328K | ﹤0.01% |
8,164
+5,545
| +212% | +$206K |
|
|
MNTV
3728
CALL
DELISTED
Momentive Global Inc. Common Stock
MNTV
| $328K | ﹤0.01% |
35,200
+32,300
| +1,114% | +$253K |
|
|
AQUA
3729
CALL
DELISTED
Evoqua Water Technologies Corp. Common Stock
AQUA
| $328K | ﹤0.01% |
6,600
-58,800
| -90% | -$2.75M |
|
3730
CALL
Byrna Technologies
BYRN
$89M
| $327K | ﹤0.01% |
43,100
+34,400
| +395% | +$306K |
|
3731
PUT
Fulgent Genetics
FLGT
$561M
| $327K | ﹤0.01% |
10,500
+700
| +7% | +$22.5K |
|
3732
PUT
Kayne Anderson Energy Infrastructure Fund
KYN
$2.44B
| $327K | ﹤0.01% |
37,900
+1,800
| +5% | +$15.8K |
|
3733
Sunoco
SUN
$14.2B
| $327K | ﹤0.01% |
7,458
-33,185
| -82% | -$1.5M |
|
3734
CALL
TE Connectivity
TEL
$60.3B
| $327K | ﹤0.01% |
2,500
-5,900
| -70% | -$747K |
|
3735
CALL
Tower Semiconductor
TSEM
$22.8B
| $327K | ﹤0.01% |
7,700
-20,200
| -72% | -$844K |
|
|
VNET
3736
PUT
VNET Group
VNET
$1.9B
| $327K | ﹤0.01% |
101,100
+29,500
| +41% | +$144K |
|
|
EGLE
3737
PUT
DELISTED
Eagle Bulk Shipping Inc.
EGLE
| $327K | ﹤0.01% |
7,200
-2,300
| -24% | -$123K |
|
3738
CALL
Archrock
AROC
$6.08B
| $326K | ﹤0.01% |
33,400
+26,400
| +377% | +$259K |
|
3739
eHealth
EHTH
$43.5M
| $326K | ﹤0.01% |
34,927
+30,390
| +670% | +$239K |
|
3740
PUT
ZipRecruiter
ZIP
$364M
| $326K | ﹤0.01% |
20,500
+20,300
| +10,150% | +$367K |
|
3741
CALL
Vita Coco
COCO
$3.87B
| $325K | ﹤0.01% |
16,600
+14,600
| +730% | +$229K |
|
3742
CALL
CareTrust REIT
CTRE
$10.2B
| $325K | ﹤0.01% |
16,600
+8,600
| +108% | +$168K |
|
3743
PUT
FuboTV Inc
FUBO
$260M
| $325K | ﹤0.01% |
22,383
-21,267
| -49% | -$486K |
|
3744
CALL
Globalstar
GSAT
$10.1B
| $325K | ﹤0.01% |
18,680
-24,500
| -57% | -$452K |
|
|
SVM
3745
Silvercorp Metals
SVM
$2.07B
| $325K | ﹤0.01% |
85,188
+15,465
| +22% | +$50.9K |
|
3746
CALL
Verrica Pharmaceuticals
VRCA
$99.3M
| $325K | ﹤0.01% |
5,000
+4,660
| +1,371% | +$282K |
|
3747
CALL
Woodside Energy
WDS
$42.4B
| $325K | ﹤0.01% |
14,500
+10,600
| +272% | +$255K |
|
3748
Arch Capital
ACGL
$37.3B
| $324K | ﹤0.01% |
4,785
-33,818
| -88% | -$2.22M |
|
3749
CALL
BBVA Argentina
BBAR
$3.76B
| $324K | ﹤0.01% |
82,900
+72,200
| +675% | +$323K |
|
|
HA
3750
CALL
DELISTED
Hawaiian Holdings, Inc.
HA
| $324K | ﹤0.01% |
35,400
-7,900
| -18% | -$83.6K |
|
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.