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 |
Microsoft
MSFT
|
+$114M |
| 2 |
NVIDIA
NVDA
|
+$85.9M |
| 3 |
Citigroup
C
|
+$61.5M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.5M |
| 5 |
Pfizer
PFE
|
+$41.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$467M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$71.2M |
| 3 |
Meta Platforms (Facebook)
META
|
+$47.6M |
| 4 |
Intel
INTC
|
+$41.9M |
| 5 |
TSMC
TSM
|
+$35.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.51% |
| 2 | Financials | 0.35% |
| 3 | Consumer Discretionary | 0.3% |
| 4 | Healthcare | 0.25% |
| 5 | Industrials | 0.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5601
PUT
ProPetro Holding
PUMP
$1.35B
| $95K | ﹤0.01% |
11,900
-45,900
| -79% | -$410K |
|
5602
Root
ROOT
$954M
| $95K | ﹤0.01% |
12,126
+2,160
| +22% | +$33.8K |
|
5603
Trade Desk
TTD
$8.91B
| $95K | ﹤0.01% |
1,600
-72,405
| -98% | -$4.12M |
|
5604
PUT
Clearfield
CLFD
$459M
| $94K | ﹤0.01% |
900
-11,700
| -93% | -$1.14M |
|
5605
PUT
First Financial Bancorp
FFBC
$3.61B
| $94K | ﹤0.01% |
4,500
+2,400
| +114% | +$52K |
|
5606
Centrus Energy
LEU
$3.69B
| $94K | ﹤0.01% |
2,307
-1,219
| -35% | -$46.9K |
|
5607
CALL
Montauk Renewables
MNTK
$243M
| $94K | ﹤0.01% |
+5,400
| New | +$80.6K |
|
5608
CALL
nVent Electric
NVT
$26.2B
| $94K | ﹤0.01% |
3,000
-9,200
| -75% | -$307K |
|
5609
Omeros
OMER
$916M
| $94K | ﹤0.01% |
+29,872
| New | +$139K |
|
|
SHOE
5610
CALL
Shoe Station Group
SHOE
$424M
| $94K | ﹤0.01% |
4,400
+1,300
| +42% | +$29.8K |
|
|
TGB
5611
CALL
Trekor Metals
TGB
$2.99B
| $94K | ﹤0.01% |
83,000
+16,800
| +25% | +$18.3K |
|
5612
Vanguard Tax-Exempt Bond Index Fund
VTEB
$45.2B
| $94K | ﹤0.01% |
+1,954
| New | +$97.7K |
|
|
VXRT
5613
DELISTED
Vaxart
VXRT
| $94K | ﹤0.01% |
43,398
+19,187
| +79% | +$66.2K |
|
5614
PUT
WPP
WPP
$4.45B
| $94K | ﹤0.01% |
2,300
-17,100
| -88% | -$802K |
|
|
WSR
5615
PUT
DELISTED
Whitestone REIT
WSR
| $94K | ﹤0.01% |
11,200
+100
| +0.9% | +$1.03K |
|
5616
CALL
Arlo Technologies
ARLO
$1.73B
| $93K | ﹤0.01% |
20,200
+3,000
| +17% | +$18.8K |
|
|
CGAU
5617
Centerra Gold
CGAU
$3.81B
| $93K | ﹤0.01% |
+21,132
| New | +$110K |
|
5618
PUT
Coursera
COUR
$1.66B
| $93K | ﹤0.01% |
8,700
-26,900
| -76% | -$356K |
|
5619
PUT
Evolution Petroleum
EPM
$125M
| $93K | ﹤0.01% |
13,500
+4,000
| +42% | +$26.4K |
|
|
HEES
5620
CALL
DELISTED
H&E Equipment Services
HEES
| $93K | ﹤0.01% |
3,300
+1,400
| +74% | +$44K |
|
5621
CALL
Janus International
JBI
$769M
| $93K | ﹤0.01% |
10,500
+1,200
| +13% | +$12.2K |
|
5622
Lifetime Brands
LCUT
$192M
| $93K | ﹤0.01% |
13,767
+5,171
| +60% | +$48.9K |
|
5623
Labcorp
LH
$25.4B
| $93K | ﹤0.01% |
530
-4,090
| -89% | -$837K |
|
5624
McEwen Inc
MUX
$1.18B
| $93K | ﹤0.01% |
28,769
-29,391
| -51% | -$101K |
|
5625
PUT
Rollins
ROL
$18.1B
| $93K | ﹤0.01% |
2,700
-10,000
| -79% | -$361K |
|
Similar funds
Simplex Trading's Q3 2022 Portfolio in Review
As of Q3 2022, Simplex Trading held 11,570 positions worth $88.5B, down 6% from $94.1B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading's Q3 2022 filing shows 1,564 new, 4,281 increased, 3,851 reduced and 1,575 closed positions. Its largest new stake was Microsoft: 432,062 shares worth $101M. The largest sale was Apple, an estimated $467M.
By sector, the portfolio is most concentrated in Technology at 0.51% of assets, down from 0.84% a quarter earlier, followed by Financials and Consumer Discretionary.
- Simplex Trading's largest Q3 2022 buy was Microsoft: 432,062 shares worth $101M.
- Simplex Trading added most to NVIDIA in Q3 2022, an estimated $85.9M increase.
- Simplex Trading's biggest Q3 2022 reduction was Apple, cutting an estimated $467M.
- Simplex Trading fully exited iShares Core S&P 500 ETF in Q3 2022, selling an estimated $34.3M.
- Simplex Trading's ten largest holdings make up 38% of its $88.5B portfolio in Q3 2022.
- Simplex Trading opened 1,564 new positions and closed 1,575 in Q3 2022.
- Simplex Trading's portfolio value fell 6% quarter-over-quarter to $88.5B.
Based on Simplex Trading's 13F filing for Q3 2022, filed 4 Nov 2022.