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 | |
|---|---|---|---|---|---|---|
|
SRTA
5301
CALL
Strata Critical Medical Inc
SRTA
$440M
| $82K | ﹤0.01% |
23,100
-2,800
| -11% | -$12K |
|
5302
CALL
Celularity
CELU
$19.7M
| $82K | ﹤0.01% |
6,400
-14,740
| -70% | -$272K |
|
5303
Coursera
COUR
$1.51B
| $82K | ﹤0.01% |
+6,961
| New | +$87.8K |
|
5304
PUT
California Resources
CRC
$4.53B
| $82K | ﹤0.01% |
1,900
-6,100
| -76% | -$267K |
|
5305
PUT
Dole
DOLE
$1.36B
| $82K | ﹤0.01% |
8,500
-62,700
| -88% | -$571K |
|
|
EFC
5306
PUT
Ellington Financial
EFC
$1.69B
| $82K | ﹤0.01% |
6,700
-800
| -11% | -$10.4K |
|
|
MCW
5307
DELISTED
Mister Car Wash
MCW
| $82K | ﹤0.01% |
+8,903
| New | +$82.5K |
|
5308
Skywest
SKYW
$4.29B
| $82K | ﹤0.01% |
4,999
-14,038
| -74% | -$246K |
|
|
NESR
5309
National Energy Services Reunited Corp
NESR
$2.67B
| $82K | ﹤0.01% |
11,892
+6
| +0.1% | +$40 |
|
|
PDCE
5310
PUT
DELISTED
PDC Energy, Inc.
PDCE
| $82K | ﹤0.01% |
1,300
-13,700
| -91% | -$955K |
|
|
TRQ
5311
CALL
DELISTED
Turquoise Hill Resources Ltd
TRQ
| $82K | ﹤0.01% |
28,700
-138,600
| -83% | -$4.21M |
|
5312
PUT
ATN International
ATNI
$361M
| $81K | ﹤0.01% |
1,800
+1,600
| +800% | +$70K |
|
5313
PUT
Boot Barn
BOOT
$4.68B
| $81K | ﹤0.01% |
1,300
-20,100
| -94% | -$1.21M |
|
5314
CALL
DarioHealth
DRIO
$70.2M
| $81K | ﹤0.01% |
955
+65
| +7% | +$5.85K |
|
5315
Graphic Packaging
GPK
$3.24B
| $81K | ﹤0.01% |
3,684
-10,826
| -75% | -$238K |
|
5316
CALL
Gold Royalty Corp
GROY
$621M
| $81K | ﹤0.01% |
34,900
-4,600
| -12% | -$11.5K |
|
5317
CALL
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$4.85B
| $81K | ﹤0.01% |
2,800
-7,600
| -73% | -$221K |
|
5318
CALL
Immunovant
IMVT
$8.11B
| $81K | ﹤0.01% |
4,600
+4,000
| +667% | +$50.4K |
|
5319
Navigator Holdings
NVGS
$1.37B
| $81K | ﹤0.01% |
6,826
-7,530
| -52% | -$91.5K |
|
|
PHX
5320
CALL
DELISTED
PHX Minerals
PHX
| $81K | ﹤0.01% |
20,900
+2,800
| +15% | +$10.5K |
|
5321
PUT
Rexford Industrial Realty
REXR
$8.56B
| $81K | ﹤0.01% |
1,500
-1,200
| -44% | -$64.7K |
|
5322
CALL
Robert Half
RHI
$3.81B
| $81K | ﹤0.01% |
1,100
-1,600
| -59% | -$122K |
|
5323
CALL
Shoals Technologies Group
SHLS
$1.49B
| $81K | ﹤0.01% |
3,300
-20,600
| -86% | -$497K |
|
|
ACCD
5324
CALL
DELISTED
Accolade Inc
ACCD
| $81K | ﹤0.01% |
10,400
-35,600
| -77% | -$340K |
|
5325
PUT
Angi Inc
ANGI
$229M
| $80K | ﹤0.01% |
3,430
-2,380
| -41% | -$53.3K |
|
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.