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 | |
|---|---|---|---|---|---|---|
|
CAN
4776
PUT
Canaan Creative
CAN
$127M
| $175K | ﹤0.01% |
53,400
+30,500
| +133% | +$111K |
|
4777
CALL
eHealth
EHTH
$42.2M
| $175K | ﹤0.01% |
44,800
-10,800
| -19% | -$75.3K |
|
|
CEI
4778
CALL
DELISTED
Camber Energy, Inc
CEI
| $175K | ﹤0.01% |
18,032
+824
| +5% | +$13.9K |
|
4779
PUT
AtaiBeckley Inc
ATAI
$2.66B
| $174K | ﹤0.01% |
52,800
+44,700
| +552% | +$184K |
|
4780
PUT
Euronet Worldwide
EEFT
$2.72B
| $174K | ﹤0.01% |
2,300
-33,200
| -94% | -$3.12M |
|
4781
PUT
Health Catalyst
HCAT
$154M
| $174K | ﹤0.01% |
18,000
+16,500
| +1,100% | +$218K |
|
4782
PUT
Jefferies Financial Group
JEF
$12.6B
| $174K | ﹤0.01% |
6,171
-11,193
| -64% | -$339K |
|
4783
PUT
Navient
NAVI
$789M
| $174K | ﹤0.01% |
11,900
-5,000
| -30% | -$76.3K |
|
4784
PUT
Regenxbio
RGNX
$620M
| $174K | ﹤0.01% |
+6,600
| New | +$196K |
|
|
SGMO
4785
PUT
DELISTED
SANGAMO THERAPEUTICS INC
SGMO
| $174K | ﹤0.01% |
35,600
+6,000
| +20% | +$30.8K |
|
4786
PUT
Solid Power
SLDP
$463M
| $174K | ﹤0.01% |
33,200
-10,300
| -24% | -$65.1K |
|
4787
PUT
Veracyte
VCYT
$3.7B
| $174K | ﹤0.01% |
10,500
+9,500
| +950% | +$214K |
|
|
TWNK
4788
CALL
DELISTED
Hostess Brands, Inc. Class A Common Stock
TWNK
| $174K | ﹤0.01% |
7,500
-3,300
| -31% | -$74.9K |
|
|
UMPQ
4789
CALL
DELISTED
Umpqua Holdings Corp
UMPQ
| $174K | ﹤0.01% |
10,200
+5,800
| +132% | +$103K |
|
4790
CALL
Amkor Technology
AMKR
$12.4B
| $173K | ﹤0.01% |
10,200
-1,900
| -16% | -$36.6K |
|
4791
CALL
Acuity Brands
AYI
$9.83B
| $173K | ﹤0.01% |
1,100
-1,000
| -48% | -$169K |
|
4792
CALL
Energizer
ENR
$1.44B
| $173K | ﹤0.01% |
6,900
-2,100
| -23% | -$61.2K |
|
4793
CALL
Home BancShares
HOMB
$6.23B
| $173K | ﹤0.01% |
7,700
-56,200
| -88% | -$1.3M |
|
4794
Immersion
IMMR
$251M
| $173K | ﹤0.01% |
31,629
-4,587
| -13% | -$25.9K |
|
4795
Direxion Daily Homebuilders & Supplies Bull 3X ETF
NAIL
$531M
| $173K | ﹤0.01% |
7,955
+2,743
| +53% | +$86.4K |
|
4796
PUT
Power Integrations
POWI
$3.38B
| $173K | ﹤0.01% |
2,700
+2,600
| +2,600% | +$195K |
|
4797
PUT
Skywest
SKYW
$4.24B
| $173K | ﹤0.01% |
10,700
+100
| +0.9% | +$2.12K |
|
4798
Terex
TEX
$7.18B
| $173K | ﹤0.01% |
5,819
-10,171
| -64% | -$333K |
|
4799
PUT
Teekay
TK
$1.01B
| $173K | ﹤0.01% |
48,300
-87,200
| -64% | -$290K |
|
4800
Vanguard FTSE Developed Markets ETF
VEA
$229B
| $173K | ﹤0.01% |
+4,759
| New | +$194K |
|
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.