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 | |
|---|---|---|---|---|---|---|
1301
CALL
Deutsche Bank
DB
$66.4B
| $4.35M | ﹤0.01% |
377,600
-47,500
| -11% | -$469K |
|
1302
PUT
Markel Group
MKL
$24.9B
| $4.35M | ﹤0.01% |
3,300
-5,900
| -64% | -$7.3M |
|
1303
CALL
Invesco S&P SmallCap Low Volatility ETF
XSLV
$250M
| $4.34M | ﹤0.01% |
80,400
-55,100
| -41% | -$2.47M |
|
1304
PUT
Vanguard Consumer Discretionary ETF
VCR
$5.83B
| $4.33M | ﹤0.01% |
15,000
-11,300
| -43% | -$2.65M |
|
1305
CALL
Fastly Inc
FSLY
$3.18B
| $4.33M | ﹤0.01% |
528,800
+1,500
| +0.3% | +$13.1K |
|
1306
CALL
Comstock Resources
CRK
$4.01B
| $4.33M | ﹤0.01% |
315,500
+60,100
| +24% | +$1.03M |
|
1307
CALL
ScottsMiracle-Gro
SMG
$4.03B
| $4.31M | ﹤0.01% |
88,800
+48,100
| +118% | +$2.41M |
|
1308
PUT
CoStar Group
CSGP
$11.4B
| $4.31M | ﹤0.01% |
55,800
+34,100
| +157% | +$2.66M |
|
1309
PUT
Doximity
DOCS
$3.71B
| $4.3M | ﹤0.01% |
128,300
+98,300
| +328% | +$3M |
|
1310
PUT
Huntsman Corp
HUN
$2.26B
| $4.28M | ﹤0.01% |
155,700
+34,600
| +29% | +$941K |
|
|
FRC
1311
CALL
DELISTED
First Republic Bank
FRC
| $4.28M | ﹤0.01% |
35,100
+26,000
| +286% | +$3.17M |
|
1312
PUT
Saia
SAIA
$11.3B
| $4.28M | ﹤0.01% |
20,400
+19,400
| +1,940% | +$4.23M |
|
1313
CALL
SentinelOne
S
$6.19B
| $4.27M | ﹤0.01% |
292,900
+39,600
| +16% | +$733K |
|
1314
CALL
Canadian Imperial Bank of Commerce
CM
$107B
| $4.27M | ﹤0.01% |
105,600
+14,800
| +16% | +$653K |
|
1315
CALL
Alaska Air
ALK
$5.16B
| $4.26M | ﹤0.01% |
99,300
+18,400
| +23% | +$811K |
|
|
DO
1316
DELISTED
Diamond Offshore Drilling, Inc.
DO
| $4.25M | ﹤0.01% |
408,896
+366,357
| +861% | +$3.35M |
|
1317
CALL
Build-A-Bear
BBW
$426M
| $4.25M | ﹤0.01% |
178,300
+167,100
| +1,492% | +$3.22M |
|
1318
PUT
Waters Corp
WAT
$36.8B
| $4.25M | ﹤0.01% |
12,400
-2,700
| -18% | -$854K |
|
1319
CALL
Academy Sports + Outdoors
ASO
$2.9B
| $4.25M | ﹤0.01% |
80,800
-86,900
| -52% | -$4.15M |
|
1320
CALL
Cencora
COR
$60.1B
| $4.24M | ﹤0.01% |
25,600
+5,500
| +27% | +$869K |
|
1321
PUT
Royal Bank of Canada
RY
$290B
| $4.23M | ﹤0.01% |
45,000
+14,100
| +46% | +$1.33M |
|
1322
PUT
iShares Core MSCI Emerging Markets ETF
IEMG
$149B
| $4.23M | ﹤0.01% |
102,500
-437,900
| -81% | -$19.9M |
|
1323
PUT
Manhattan Associates
MANH
$9.14B
| $4.22M | ﹤0.01% |
34,800
-5,200
| -13% | -$639K |
|
|
MRTX
1324
CALL
DELISTED
Mirati Therapeutics, Inc. Common Stock
MRTX
| $4.22M | ﹤0.01% |
93,200
+76,900
| +472% | +$4.98M |
|
1325
PUT
Innovative Industrial Properties
IIPR
$1.79B
| $4.22M | ﹤0.01% |
41,600
-11,400
| -22% | -$1.21M |
|
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.