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 | |
|---|---|---|---|---|---|---|
|
BINI
3526
CALL
DELISTED
Bollinger Innovations
BINI
| – | – |
0
| – | – |
|
3527
PUT
Envista
NVST
$4.34B
| $392K | ﹤0.01% |
9,600
-63,500
| -87% | -$2.41M |
|
3528
Thor Industries
THO
$3.98B
| $392K | ﹤0.01% |
+4,925
| New | +$434K |
|
3529
2x Long VIX Futures ETF
UVIX
$271M
| $392K | ﹤0.01% |
+12
| New | +$488K |
|
|
VISN
3530
CALL
Vistance Networks Inc
VISN
$2.67B
| $391K | ﹤0.01% |
61,500
-556,900
| -90% | -$4.22M |
|
3531
CALL
Intrepid Potash
IPI
$461M
| $391K | ﹤0.01% |
14,200
+9,100
| +178% | +$277K |
|
3532
PUT
Kinsale Capital Group
KNSL
$8.24B
| $390K | ﹤0.01% |
1,300
-5,900
| -82% | -$1.73M |
|
3533
CALL
SurgePays
SURG
$6.08M
| $390K | ﹤0.01% |
87,000
-23,600
| -21% | -$127K |
|
3534
CALL
Teradata
TDC
$2.8B
| $390K | ﹤0.01% |
9,700
-16,000
| -62% | -$595K |
|
3535
Texas Roadhouse
TXRH
$13.2B
| $390K | ﹤0.01% |
3,612
+2,925
| +426% | +$299K |
|
3536
CALL
Xometry
XMTR
$4.75B
| $390K | ﹤0.01% |
26,100
-12,300
| -32% | -$323K |
|
3537
PUT
SK Telecom
SKM
$13.5B
| $389K | ﹤0.01% |
19,000
+11,500
| +153% | +$235K |
|
3538
Gogo Inc
GOGO
$540M
| $388K | ﹤0.01% |
+26,824
| New | +$418K |
|
|
PPLI
3539
CALL
People Inc
PPLI
$3.15B
| $387K | ﹤0.01% |
9,143
+2,804
| +44% | +$120K |
|
3540
Myriad Genetics
MYGN
$515M
| $387K | ﹤0.01% |
16,702
+16,613
| +18,666% | +$337K |
|
3541
iShares S&P 100 ETF
OEF
$19.8B
| $387K | ﹤0.01% |
2,070
-191
| -8% | -$34.3K |
|
3542
PharmaCyte Biotech
PMCB
$6.28M
| $387K | ﹤0.01% |
133,200
+69,592
| +109% | +$205K |
|
|
FORG
3543
PUT
DELISTED
ForgeRock, Inc.
FORG
| $387K | ﹤0.01% |
18,800
+6,400
| +52% | +$130K |
|
3544
Avis
CAR
$5.78B
| $386K | ﹤0.01% |
+1,982
| New | +$398K |
|
3545
PUT
Mattel
MAT
$4.3B
| $386K | ﹤0.01% |
21,000
-259,800
| -93% | -$4.83M |
|
3546
PUT
BCE
BCE
$19.8B
| $385K | ﹤0.01% |
8,600
-33,800
| -80% | -$1.53M |
|
3547
CALL
Equifax
EFX
$20.8B
| $385K | ﹤0.01% |
1,900
-4,700
| -71% | -$978K |
|
3548
IQVIA
IQV
$35.6B
| $385K | ﹤0.01% |
+1,937
| New | +$414K |
|
|
ETRN
3549
CALL
DELISTED
Equitrans Midstream Corporation Common Stock
ETRN
| $385K | ﹤0.01% |
66,700
-99,600
| -60% | -$638K |
|
3550
CALL
Veru
VERU
$36.6M
| $384K | ﹤0.01% |
33,160
+5,250
| +19% | +$213K |
|
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.