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 | |
|---|---|---|---|---|---|---|
2076
Alexandria Real Estate Equities
ARE
$8.88B
| $1.54M | ﹤0.01% |
10,546
-8,434
| -44% | -$1.22M |
|
2077
CALL
Ferguson
FERG
$44.7B
| $1.54M | ﹤0.01% |
12,100
-12,300
| -50% | -$1.43M |
|
2078
PUT
National Grid
NGG
$82.7B
| $1.53M | ﹤0.01% |
26,954
-11,462
| -30% | -$613K |
|
2079
CALL
Huazhu Hotels Group
HTHT
$12.4B
| $1.53M | ﹤0.01% |
36,100
-35,100
| -49% | -$1.27M |
|
|
TGH
2080
CALL
DELISTED
Textainer Group Holdings limited
TGH
| $1.53M | ﹤0.01% |
49,400
+19,400
| +65% | +$575K |
|
|
CRON
2081
CALL
Cronos Group
CRON
$1.05B
| $1.53M | ﹤0.01% |
600,900
+375,200
| +166% | +$1.1M |
|
2082
PUT
American Water Works
AWK
$26.3B
| $1.52M | ﹤0.01% |
10,000
-46,400
| -82% | -$6.7M |
|
|
MYOV
2083
CALL
DELISTED
Myovant Sciences Ltd.
MYOV
| $1.52M | ﹤0.01% |
56,500
+24,500
| +77% | +$644K |
|
2084
CALL
Allison Transmission
ALSN
$10.1B
| $1.52M | ﹤0.01% |
36,600
+30,500
| +500% | +$1.25M |
|
|
NEX
2085
CALL
DELISTED
NexTier Oilfield Solutions Inc.
NEX
| $1.52M | ﹤0.01% |
164,700
+58,700
| +55% | +$574K |
|
2086
PUT
Tradeweb Markets
TW
$21.3B
| $1.52M | ﹤0.01% |
23,400
-5,700
| -20% | -$335K |
|
2087
CALL
Target Hospitality
TH
$1.61B
| $1.51M | ﹤0.01% |
100,000
-12,400
| -11% | -$167K |
|
2088
AutoZone
AZO
$48.3B
| $1.51M | ﹤0.01% |
613
-229
| -27% | -$553K |
|
|
HOLX
2089
DELISTED
Hologic
HOLX
| $1.51M | ﹤0.01% |
20,176
+15,870
| +369% | +$1.13M |
|
|
MRSH
2090
CALL
Marsh
MRSH
$86.3B
| $1.5M | ﹤0.01% |
9,100
+5,600
| +160% | +$916K |
|
|
NEWR
2091
CALL
DELISTED
New Relic, Inc.
NEWR
| $1.5M | ﹤0.01% |
26,600
-6,100
| -19% | -$345K |
|
2092
CALL
STAAR Surgical
STAA
$1.16B
| $1.5M | ﹤0.01% |
30,900
+1,800
| +6% | +$113K |
|
2093
CALL
Bruker
BRKR
$9.2B
| $1.5M | ﹤0.01% |
21,900
+5,600
| +34% | +$356K |
|
2094
Nice
NICE
$5.29B
| $1.49M | ﹤0.01% |
7,774
-1,250
| -14% | -$241K |
|
2095
Deutsche Bank
DB
$66.3B
| $1.49M | ﹤0.01% |
+129,648
| New | +$1.28M |
|
2096
Aehr Test Systems
AEHR
$2.48B
| $1.49M | ﹤0.01% |
74,197
-169,826
| -70% | -$3.63M |
|
2097
PUT
Gaotu Techedu
GOTU
$372M
| $1.49M | ﹤0.01% |
631,400
+584,600
| +1,249% | +$844K |
|
2098
PUT
Virgin Galactic
SPCE
$320M
| $1.49M | ﹤0.01% |
21,415
-14,570
| -40% | -$1.36M |
|
|
SWN
2099
DELISTED
Southwestern Energy Company
SWN
| $1.49M | ﹤0.01% |
254,796
+221,974
| +676% | +$1.46M |
|
2100
PUT
Banco Bradesco
BBD
$38.1B
| $1.49M | ﹤0.01% |
517,173
-115,740
| -18% | -$375K |
|
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.