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 | |
|---|---|---|---|---|---|---|
|
KEUA
4926
DELISTED
KraneShares European Carbon Allowance Strategy ETF
KEUA
| $113K | ﹤0.01% |
3,730
-1,751
| -32% | -$49.3K |
|
4927
Oil States International
OIS
$466M
| $113K | ﹤0.01% |
15,179
+8,812
| +138% | +$54.5K |
|
4928
CALL
Outdoor Holding Co
POWW
$249M
| $113K | ﹤0.01% |
65,700
-110,700
| -63% | -$279K |
|
4929
PUT
ProQR Therapeutics
PRQR
$244M
| $113K | ﹤0.01% |
30,700
+29,300
| +2,093% | +$38.4K |
|
4930
PUT
Sensata Technologies
ST
$6.69B
| $113K | ﹤0.01% |
2,800
-5,700
| -67% | -$237K |
|
4931
PUT
TETRA Technologies
TTI
$1.08B
| $113K | ﹤0.01% |
32,800
| – | – |
|
4932
Direxion Daily 7-10 Year Treasury Bull 3X ETF
TYD
$31.9M
| $113K | ﹤0.01% |
3,818
+273
| +8% | +$8.22K |
|
4933
CALL
US Physical Therapy
USPH
$1.22B
| $113K | ﹤0.01% |
1,400
-78,400
| -98% | -$6.58M |
|
|
AAMI
4934
CALL
Acadian Asset Management
AAMI
$2.88B
| $113K | ﹤0.01% |
5,500
| – | – |
|
4935
PUT
Deluxe
DLX
$1.25B
| $112K | ﹤0.01% |
6,600
-3,100
| -32% | -$55.2K |
|
4936
PUT
Hudbay
HBM
$9.76B
| $112K | ﹤0.01% |
22,200
+21,600
| +3,600% | +$104K |
|
|
ERF
4937
DELISTED
Enerplus Corporation
ERF
| $112K | ﹤0.01% |
6,372
-2,805
| -31% | -$48.1K |
|
4938
Banco Macro
BMA
$5.81B
| $111K | ﹤0.01% |
6,790
-13,244
| -66% | -$190K |
|
|
DEA
4939
PUT
Easterly Government Properties
DEA
$1.16B
| $111K | ﹤0.01% |
3,120
-1,480
| -32% | -$57.6K |
|
4940
CALL
Entegris
ENTG
$16.3B
| $111K | ﹤0.01% |
1,700
-23,000
| -93% | -$1.69M |
|
4941
Liberty Broadband Class C
LBRDK
$4.89B
| $111K | ﹤0.01% |
1,462
+1,431
| +4,616% | +$116K |
|
4942
Microvast
MVST
$237M
| $111K | ﹤0.01% |
73,035
-65,201
| -47% | -$133K |
|
4943
PUT
SPX Corp
SPXC
$9.39B
| $111K | ﹤0.01% |
1,700
| – | – |
|
|
BCLI
4944
CALL
DELISTED
BRAINSTORM CELL THERAPUTC
BCLI
| $110K | ﹤0.01% |
4,507
-453
| -9% | -$16.9K |
|
4945
CALL
Dyadic International
DYAI
$38.6M
| $110K | ﹤0.01% |
89,500
-200
| -0.2% | -$342 |
|
4946
CALL
Mercer International
MERC
$40.5M
| $110K | ﹤0.01% |
9,500
-2,700
| -22% | -$35.9K |
|
4947
PUT
Oceaneering
OII
$4.64B
| $110K | ﹤0.01% |
6,300
+4,300
| +215% | +$57.1K |
|
|
4948
Sensata Technologies
ST
$6.69B
| $110K | ﹤0.01% |
2,729
-4,080
| -60% | -$170K |
|
|
TPC
4949
CALL
Tutor Perini Cor
TPC
$4.03B
| $110K | ﹤0.01% |
14,700
+11,300
| +332% | +$80.1K |
|
|
ACCD
4950
DELISTED
Accolade Inc
ACCD
| $110K | ﹤0.01% |
+14,122
| New | +$135K |
|
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.