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 | |
|---|---|---|---|---|---|---|
4026
State Street SPDR Nuveen ICE High Yield Municipal Bond ETF
HYMB
$3.1B
| $234K | ﹤0.01% |
9,580
+6,388
| +200% | +$156K |
|
4027
CALL
Rayonier
RYN
$6.63B
| $234K | ﹤0.01% |
7,826
-19,289
| -71% | -$593K |
|
4028
Advanced Micro Devices
AMD
$729B
| $233K | ﹤0.01% |
3,598
+1,264
| +54% | +$83.4K |
|
4029
Frontline
FRO
$8.6B
| $233K | ﹤0.01% |
19,218
+18,159
| +1,715% | +$233K |
|
4030
PUT
Genmab
GMAB
$17.7B
| $233K | ﹤0.01% |
+5,500
| New | +$227K |
|
4031
CALL
iShares S&P GSCI Commodity-Indexed Trust
GSG
$998M
| $233K | ﹤0.01% |
11,000
-7,300
| -40% | -$157K |
|
4032
CALL
International Seaways
INSW
$4.64B
| $233K | ﹤0.01% |
6,300
-3,500
| -36% | -$142K |
|
4033
Argan
AGX
$7.25B
| $232K | ﹤0.01% |
6,307
+5,841
| +1,253% | +$205K |
|
4034
PUT
Allison Transmission
ALSN
$9.94B
| $232K | ﹤0.01% |
5,600
-1,600
| -22% | -$65.8K |
|
4035
CALL
AquaBounty Technologies
AQB
$4.74M
| $232K | ﹤0.01% |
15,210
-315
| -2% | -$4.29K |
|
4036
PUT
Bank of Hawaii
BOH
$3.17B
| $232K | ﹤0.01% |
+3,000
| New | +$233K |
|
4037
CALL
Nabors Industries
NBR
$1.14B
| $232K | ﹤0.01% |
1,500
+300
| +25% | +$44.8K |
|
4038
CALL
Redwire
RDW
$2B
| $232K | ﹤0.01% |
117,500
-11,700
| -9% | -$27K |
|
4039
Annexon
ANNX
$800M
| $231K | ﹤0.01% |
+44,760
| New | +$246K |
|
|
CIVI
4040
CALL
DELISTED
Civitas Resources
CIVI
| $231K | ﹤0.01% |
4,000
-100
| -2% | -$6.45K |
|
4041
PUT
Commercial Metals
CMC
$7.73B
| $231K | ﹤0.01% |
4,800
-3,600
| -43% | -$165K |
|
4042
Mohawk Industries
MHK
$6.97B
| $231K | ﹤0.01% |
2,268
-2,589
| -53% | -$254K |
|
4043
CALL
Smith & Wesson
SWBI
$657M
| $231K | ﹤0.01% |
26,700
-68,700
| -72% | -$724K |
|
4044
Telephone and Data Systems
TDS
$3.86B
| $231K | ﹤0.01% |
22,040
+21,281
| +2,804% | +$263K |
|
4045
PUT
Axcelis
ACLS
$3.67B
| $230K | ﹤0.01% |
2,900
-3,100
| -52% | -$218K |
|
4046
CALL
Biohaven
BHVN
$2.08B
| $230K | ﹤0.01% |
+16,600
| New | +$234K |
|
4047
CALL
Home BancShares
HOMB
$6.31B
| $230K | ﹤0.01% |
10,100
+2,400
| +31% | +$58.2K |
|
|
PPLI
4048
CALL
People Inc
PPLI
$3.16B
| $230K | ﹤0.01% |
6,339
-23,770
| -79% | -$940K |
|
4049
PUT
Rocket Lab Corp
RKLB
$39.4B
| $230K | ﹤0.01% |
61,100
-1,800
| -3% | -$7.86K |
|
4050
CALL
Silicon Laboratories
SLAB
$7.17B
| $230K | ﹤0.01% |
1,700
-13,100
| -89% | -$1.72M |
|
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.