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 |
Amazon
AMZN
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4801
PUT
FS KKR Capital
FSK
$3.01B
| $124K | ﹤0.01% |
+7,100
| New | +$132K |
|
|
MSB
4802
PUT
Mesabi Trust
MSB
$296M
| $124K | ﹤0.01% |
6,900
-3,000
| -30% | -$59.5K |
|
4803
ProShares S&P 500 Dividend Aristocrats ETF
NOBL
$11.9B
| $124K | ﹤0.01% |
+2,762
| New | +$123K |
|
4804
Rogers Communications
RCI
$18.8B
| $124K | ﹤0.01% |
2,652
+1,512
| +133% | +$64.4K |
|
4805
USA Compression Partners
USAC
$3.69B
| $124K | ﹤0.01% |
6,372
-13,701
| -68% | -$253K |
|
4806
CALL
Werner Enterprises
WERN
$2.2B
| $124K | ﹤0.01% |
3,100
+2,600
| +520% | +$106K |
|
4807
CALL
Essential Utilities
WTRG
$11.5B
| $124K | ﹤0.01% |
2,600
-2,000
| -43% | -$90.5K |
|
|
EQC
4808
PUT
DELISTED
Equity Commonwealth
EQC
| $124K | ﹤0.01% |
5,000
+1,500
| +43% | +$38.3K |
|
4809
Axcelis
ACLS
$3.44B
| $123K | ﹤0.01% |
+1,556
| New | +$110K |
|
4810
PUT
AMN Healthcare
AMN
$1.35B
| $123K | ﹤0.01% |
1,200
-8,300
| -87% | -$956K |
|
4811
CALL
Vanguard Total Bond Market
BND
$158B
| $123K | ﹤0.01% |
1,700
-23,800
| -93% | -$1.7M |
|
4812
PUT
CION Investment
CION
$297M
| $123K | ﹤0.01% |
12,700
-17,300
| -58% | -$168K |
|
4813
CALL
NerdWallet
NRDS
$632M
| $123K | ﹤0.01% |
12,900
+10,300
| +396% | +$116K |
|
4814
RPC Inc
RES
$1.13B
| $123K | ﹤0.01% |
13,913
+6,578
| +90% | +$59.4K |
|
4815
PUT
Titan Machinery
TITN
$420M
| $123K | ﹤0.01% |
3,100
-1,400
| -31% | -$49.7K |
|
4816
Upwork
UPWK
$1.18B
| $123K | ﹤0.01% |
+11,858
| New | +$146K |
|
4817
CALL
Verisk Analytics
VRSK
$27.7B
| $123K | ﹤0.01% |
700
-300
| -30% | -$52.7K |
|
|
TEN
4818
CALL
Tsakos Energy Navigation Ltd
TEN
$1.19B
| $123K | ﹤0.01% |
7,300
-29,100
| -80% | -$509K |
|
|
FFAI
4819
CALL
Faraday Future Intelligent Electric
FFAI
$11.8M
| – | – |
0
| – | – |
|
4820
CALL
Allegiant Air
ALGT
$2.57B
| $122K | ﹤0.01% |
1,800
+1,000
| +125% | +$73K |
|
4821
Amphenol
APH
$185B
| $122K | ﹤0.01% |
+3,206
| New | +$121K |
|
|
CLDT
4822
CALL
Chatham Lodging
CLDT
$632M
| $122K | ﹤0.01% |
10,000
+4,000
| +67% | +$49.3K |
|
4823
ProShares UltraShort Energy
DUG
$21.2M
| $122K | ﹤0.01% |
2,481
+1,283
| +107% | +$66.3K |
|
4824
CALL
Flowserve
FLS
$8.94B
| $122K | ﹤0.01% |
4,000
-8,000
| -67% | -$233K |
|
|
MASI
4825
DELISTED
Masimo
MASI
| $122K | ﹤0.01% |
831
-235
| -22% | -$32.3K |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.