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 | |
|---|---|---|---|---|---|---|
3451
CALL
Smith & Wesson
SWBI
$666M
| $418K | ﹤0.01% |
34,000
+7,300
| +27% | +$78.1K |
|
3452
Under Armour Class C
UA
$2.95B
| $417K | ﹤0.01% |
48,932
-30,595
| -38% | -$281K |
|
3453
CALL
Petco
WOOF
$777M
| $417K | ﹤0.01% |
46,400
-2,200
| -5% | -$22.8K |
|
3454
CALL
Sinclair Inc
SBGI
$974M
| $416K | ﹤0.01% |
+24,300
| New | +$423K |
|
3455
Gerdau
GGB
$9.48B
| $415K | ﹤0.01% |
101,167
+959
| +1% | +$4.3K |
|
3456
CALL
STAG Industrial
STAG
$7.77B
| $415K | ﹤0.01% |
12,300
-30,000
| -71% | -$1.02M |
|
3457
PUT
West Pharmaceutical
WST
$23.3B
| $415K | ﹤0.01% |
1,200
-7,300
| -86% | -$2.13M |
|
|
DX
3458
Dynex Capital
DX
$3B
| $414K | ﹤0.01% |
34,223
+33,157
| +3,110% | +$443K |
|
3459
PUT
Lakeland Industries
LAKE
$106M
| $414K | ﹤0.01% |
28,400
-66,100
| -70% | -$969K |
|
3460
Sweetgreen
SG
$733M
| $414K | ﹤0.01% |
52,861
+35,127
| +198% | +$309K |
|
|
EGLE
3461
CALL
DELISTED
Eagle Bulk Shipping Inc.
EGLE
| $414K | ﹤0.01% |
9,100
+3,400
| +60% | +$182K |
|
3462
CALL
Hycroft Mining Holding Corp
HYMC
$1.87B
| $413K | ﹤0.01% |
95,590
+24,440
| +34% | +$119K |
|
3463
Teledyne Technologies
TDY
$30.2B
| $413K | ﹤0.01% |
925
+459
| +98% | +$194K |
|
3464
CALL
Assured Guaranty
AGO
$3.78B
| $412K | ﹤0.01% |
8,200
-23,800
| -74% | -$1.38M |
|
3465
CALL
Arcturus Therapeutics
ARCT
$164M
| $412K | ﹤0.01% |
17,200
+9,800
| +132% | +$176K |
|
|
DADA
3466
DELISTED
Dada Nexus
DADA
| $412K | ﹤0.01% |
48,750
+45,058
| +1,220% | +$491K |
|
3467
PUT
PagerDuty
PD
$753M
| $412K | ﹤0.01% |
11,800
+2,400
| +26% | +$70.5K |
|
3468
CALL
Takeda Pharmaceutical
TAK
$55.7B
| $412K | ﹤0.01% |
25,000
-225,800
| -90% | -$3.6M |
|
3469
Cabot Corp
CBT
$4.61B
| $411K | ﹤0.01% |
+5,366
| New | +$402K |
|
3470
CALL
Cheniere Energy
CQP
$30.5B
| $411K | ﹤0.01% |
8,700
+7,800
| +867% | +$399K |
|
3471
PUT
The GEO Group
GEO
$4.13B
| $411K | ﹤0.01% |
52,100
-21,400
| -29% | -$210K |
|
|
3472
PUT
Smith & Wesson
SWBI
$666M
| $411K | ﹤0.01% |
33,400
-4,100
| -11% | -$43.9K |
|
3473
PUT
Globant
GLOB
$1.41B
| $410K | ﹤0.01% |
2,500
-100
| -4% | -$16.3K |
|
3474
NETGEAR
NTGR
$681M
| $409K | ﹤0.01% |
22,122
+21,932
| +11,543% | +$412K |
|
|
NVEI
3475
CALL
DELISTED
Nuvei Corporation Subordinate Voting Shares
NVEI
| $409K | ﹤0.01% |
9,400
-5,500
| -37% | -$192K |
|
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.