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 | |
|---|---|---|---|---|---|---|
|
PTRA
4976
DELISTED
Proterra Inc. Common Stock
PTRA
| $151K | ﹤0.01% |
+30,455
| New | +$171K |
|
|
AERI
4977
PUT
DELISTED
Aerie Pharmaceuticals
AERI
| $151K | ﹤0.01% |
+10,000
| New | +$116K |
|
|
SBDS
4978
CALL
DELISTED
Solo Brands Inc
SBDS
| $151K | ﹤0.01% |
995
+575
| +137% | +$108K |
|
4979
PUT
Evertec
EVTC
$1.93B
| $150K | ﹤0.01% |
+4,800
| New | +$169K |
|
4980
PUT
ESS Tech
GWH
$21.9M
| $150K | ﹤0.01% |
2,453
+1,486
| +154% | +$88K |
|
4981
CALL
Ingles Markets
IMKTA
$1.72B
| $150K | ﹤0.01% |
1,900
+300
| +19% | +$27.3K |
|
|
MASI
4982
DELISTED
Masimo
MASI
| $150K | ﹤0.01% |
+1,066
| New | +$156K |
|
4983
CALL
Mercer International
MERC
$43.7M
| $150K | ﹤0.01% |
12,200
+7,400
| +154% | +$109K |
|
|
FIRY
4984
PUT
Firy Inc
FIRY
$144M
| $150K | ﹤0.01% |
7,355
+3,685
| +100% | +$104K |
|
|
SLI
4985
PUT
Standard Lithium
SLI
$498M
| $150K | ﹤0.01% |
34,800
-16,400
| -32% | -$85.9K |
|
4986
VirnetX Holding Corp
VHC
$57.6M
| $150K | ﹤0.01% |
6,422
+4,373
| +213% | +$141K |
|
|
AKLI
4987
PUT
DELISTED
Akili Inc
AKLI
| $150K | ﹤0.01% |
+66,600
| New | +$477K |
|
|
POSH
4988
PUT
DELISTED
Poshmark, Inc. Class A Common Stock
POSH
| $150K | ﹤0.01% |
9,600
+2,800
| +41% | +$33.4K |
|
|
YELL
4989
PUT
DELISTED
Yellow Corporation Common Stock
YELL
| $150K | ﹤0.01% |
29,600
+26,700
| +921% | +$146K |
|
4990
CALL
Build-A-Bear
BBW
$435M
| $149K | ﹤0.01% |
11,200
+4,000
| +56% | +$62.6K |
|
|
CADE
4991
CALL
DELISTED
Cadence Bank
CADE
| $149K | ﹤0.01% |
5,900
+5,100
| +638% | +$131K |
|
4992
CALL
CBIZ
CBZ
$3B
| $149K | ﹤0.01% |
+3,500
| New | +$153K |
|
4993
PUT
ClearPoint Neuro
CLPT
$458M
| $149K | ﹤0.01% |
14,400
+9,000
| +167% | +$119K |
|
4994
CALL
Graco
GGG
$12.9B
| $149K | ﹤0.01% |
2,500
-4,500
| -64% | -$289K |
|
4995
Vanguard Morningstar Mega Cap ETF
MGC
$10.1B
| $149K | ﹤0.01% |
+1,200
| New | +$167K |
|
4996
PUT
Shenandoah Telecom
SHEN
$689M
| $149K | ﹤0.01% |
8,800
| – | – |
|
4997
CALL
Aegon
AEG
$14B
| $148K | ﹤0.01% |
37,600
+21,731
| +137% | +$94.6K |
|
4998
PUT
Altisource Portfolio Solutions
ASPS
$66.6M
| $148K | ﹤0.01% |
1,413
+1,138
| +414% | +$105K |
|
|
KYNB
4999
CALL
Kyntra Bio
KYNB
$27.4M
| $148K | ﹤0.01% |
456
+100
| +28% | +$32.2K |
|
5000
Bio-Techne
TECH
$11.2B
| $148K | ﹤0.01% |
2,092
+1,624
| +347% | +$140K |
|
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.