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 | |
|---|---|---|---|---|---|---|
2551
CALL
BorgWarner
BWA
$13.2B
| $1.05M | ﹤0.01% |
24,197
-7,725
| -24% | -$320K |
|
2552
Calumet Specialty Products
CLMT
$3.63B
| $1.04M | ﹤0.01% |
60,159
+25,153
| +72% | +$447K |
|
2553
iShares MSCI India ETF
INDA
$6.71B
| $1.04M | ﹤0.01% |
+26,524
| New | +$1.07M |
|
2554
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
$162M
| $1.04M | ﹤0.01% |
5,806
-18,277
| -76% | -$3.54M |
|
2555
PUT
SKYX Platforms
SKYX
$155M
| $1.04M | ﹤0.01% |
300,700
+300,200
| +60,040% | +$988K |
|
|
WW
2556
DELISTED
WW International
WW
| $1.04M | ﹤0.01% |
252,212
+251,408
| +31,270% | +$1.1M |
|
2557
CALL
Banco Bradesco
BBD
$38.1B
| $1.04M | ﹤0.01% |
396,060
-88,315
| -18% | -$235K |
|
2558
PUT
Shake Shack
SHAK
$2.3B
| $1.04M | ﹤0.01% |
18,700
-55,200
| -75% | -$3.05M |
|
2559
CALL
XPO
XPO
$25B
| $1.04M | ﹤0.01% |
47,300
-136,900
| -74% | -$4.93M |
|
2560
PUT
Nabors Industries
NBR
$1.23B
| $1.04M | ﹤0.01% |
8,500
-1,100
| -11% | -$167K |
|
2561
TAL Education Group
TAL
$5.71B
| $1.03M | ﹤0.01% |
161,477
+55,902
| +53% | +$403K |
|
2562
NCR Voyix
VYX
$1.06B
| $1.03M | ﹤0.01% |
71,541
+18,809
| +36% | +$289K |
|
|
SWTX
2563
CALL
DELISTED
SpringWorks Therapeutics
SWTX
| $1.03M | ﹤0.01% |
40,100
+7,100
| +22% | +$208K |
|
2564
PUT
Radiant Logistics
RLGT
$416M
| $1.03M | ﹤0.01% |
157,200
+31,900
| +25% | +$178K |
|
|
CBAY
2565
CALL
DELISTED
Cymabay Therapeutics
CBAY
| $1.03M | ﹤0.01% |
118,300
+76,500
| +183% | +$612K |
|
|
HBI
2566
CALL
DELISTED
Hanesbrands
HBI
| $1.03M | ﹤0.01% |
196,000
+83,300
| +74% | +$524K |
|
|
HEES
2567
CALL
DELISTED
H&E Equipment Services
HEES
| $1.03M | ﹤0.01% |
23,300
+17,800
| +324% | +$868K |
|
|
EH
2568
PUT
EHang Holdings
EH
$372M
| $1.03M | ﹤0.01% |
94,000
+51,200
| +120% | +$596K |
|
2569
PUT
Progyny
PGNY
$2.44B
| $1.03M | ﹤0.01% |
32,000
+11,700
| +58% | +$386K |
|
2570
CALL
Globus Medical
GMED
$10.4B
| $1.02M | ﹤0.01% |
18,100
+17,400
| +2,486% | +$1.12M |
|
2571
CALL
Acuity Brands
AYI
$9.88B
| $1.02M | ﹤0.01% |
5,600
-9,500
| -63% | -$1.75M |
|
2572
PUT
Cracker Barrel
CBRL
$1.2B
| $1.02M | ﹤0.01% |
9,000
-14,800
| -62% | -$1.62M |
|
2573
Whirlpool
WHR
$2.42B
| $1.02M | ﹤0.01% |
+7,747
| New | +$1.1M |
|
2574
CALL
MannKind Corp
MNKD
$1.28B
| $1.02M | ﹤0.01% |
248,300
-124,900
| -33% | -$603K |
|
2575
Aclaris Therapeutics
ACRS
$730M
| $1.02M | ﹤0.01% |
125,627
+125,534
| +134,983% | +$1.59M |
|
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.