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 | |
|---|---|---|---|---|---|---|
1326
PUT
DigitalOcean
DOCN
$14.5B
| $4.21M | ﹤0.01% |
165,300
+40,400
| +32% | +$1.26M |
|
1327
CALL
Travelers Companies
TRV
$80.8B
| $4.2M | ﹤0.01% |
22,400
-11,200
| -33% | -$2.01M |
|
1328
PUT
Sarepta Therapeutics
SRPT
$1.65B
| $4.2M | ﹤0.01% |
32,400
+23,400
| +260% | +$2.71M |
|
1329
PUT
American Electric Power
AEP
$73.7B
| $4.2M | ﹤0.01% |
44,200
-49,500
| -53% | -$4.51M |
|
1330
CALL
Ally Financial
ALLY
$13.1B
| $4.18M | ﹤0.01% |
171,100
+28,400
| +20% | +$755K |
|
1331
CALL
Chord Energy
CHRD
$7.79B
| $4.17M | ﹤0.01% |
30,500
+19,700
| +182% | +$2.89M |
|
1332
PUT
Pool Corp
POOL
$6.7B
| $4.17M | ﹤0.01% |
13,800
+3,200
| +30% | +$1.01M |
|
1333
CALL
Centene
CNC
$31.3B
| $4.17M | ﹤0.01% |
50,800
-38,000
| -43% | -$3.1M |
|
1334
PUT
Canadian Imperial Bank of Commerce
CM
$107B
| $4.16M | ﹤0.01% |
102,800
+91,500
| +810% | +$4.04M |
|
1335
Palantir
PLTR
$295B
| $4.15M | ﹤0.01% |
646,317
-852,912
| -57% | -$6.47M |
|
1336
PUT
ArcelorMittal
MT
$50.4B
| $4.12M | ﹤0.01% |
157,100
-202,700
| -56% | -$4.97M |
|
1337
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $4.12M | ﹤0.01% |
41,685
-42,325
| -50% | -$3.99M |
|
|
AXON
1338
PUT
Axon Enterprise
AXON
$40.5B
| $4.12M | ﹤0.01% |
24,800
+14,700
| +146% | +$2.32M |
|
1339
CALL
Full Truck Alliance
YMM
$9.56B
| $4.11M | ﹤0.01% |
514,100
+422,700
| +462% | +$2.9M |
|
|
SPR
1340
PUT
DELISTED
Spirit AeroSystems
SPR
| $4.11M | ﹤0.01% |
138,800
+45,000
| +48% | +$1.17M |
|
1341
CALL
Sundial Growers
SNDL
$323M
| $4.1M | ﹤0.01% |
1,960,800
+168,200
| +9% | +$400K |
|
1342
CALL
JetBlue
JBLU
$1.96B
| $4.1M | ﹤0.01% |
632,200
+88,500
| +16% | +$647K |
|
1343
CALL
International Paper
IP
$22.3B
| $4.09M | ﹤0.01% |
118,300
-68,700
| -37% | -$2.38M |
|
1344
CALL
WillScot Mobile Mini Holdings
WSC
$4.79B
| $4.07M | ﹤0.01% |
90,200
+35,300
| +64% | +$1.58M |
|
|
FSR
1345
PUT
DELISTED
Fisker Inc.
FSR
| $4.05M | ﹤0.01% |
557,300
-535,000
| -49% | -$3.98M |
|
|
SBNY
1346
PUT
DELISTED
Signature Bank
SBNY
| $4.04M | ﹤0.01% |
35,100
+25,500
| +266% | +$3.51M |
|
1347
PUT
Louisiana-Pacific
LPX
$5.21B
| $4.04M | ﹤0.01% |
68,300
+10,400
| +18% | +$613K |
|
1348
Steel Dynamics
STLD
$35.6B
| $4.03M | ﹤0.01% |
41,297
+7,846
| +23% | +$755K |
|
1349
PUT
Sociedad Química y Minera de Chile
SQM
$19.6B
| $4.03M | ﹤0.01% |
50,500
+10,200
| +25% | +$944K |
|
1350
PUT
Enovix
ENVX
$860M
| $4.03M | ﹤0.01% |
370,057
-112,686
| -23% | -$1.39M |
|
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.