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 | |
|---|---|---|---|---|---|---|
5076
Zeta Global
ZETA
$5.33B
| $100K | ﹤0.01% |
12,244
-60
| -0.5% | -$486 |
|
|
PDCO
5077
PUT
DELISTED
Patterson Companies, Inc.
PDCO
| $100K | ﹤0.01% |
3,600
-2,600
| -42% | -$71.7K |
|
|
BRAG
5078
CALL
Bragg Gaming Group
BRAG
$43.5M
| $99K | ﹤0.01% |
25,900
-200
| -0.8% | -$739 |
|
5079
PUT
Credo Technology Group
CRDO
$37.5B
| $99K | ﹤0.01% |
7,500
+7,100
| +1,775% | +$94.2K |
|
5080
CALL
Fate Therapeutics
FATE
$293M
| $99K | ﹤0.01% |
9,900
+3,500
| +55% | +$65.7K |
|
5081
CALL
ICF International
ICFI
$1.46B
| $99K | ﹤0.01% |
+1,000
| New | +$109K |
|
5082
PUT
ManpowerGroup
MAN
$2.41B
| $99K | ﹤0.01% |
1,200
| – | – |
|
5083
PUT
Playtika
PLTK
$1.51B
| $99K | ﹤0.01% |
11,700
-900
| -7% | -$8.34K |
|
|
RPTX
5084
DELISTED
Repare Therapeutics
RPTX
| $99K | ﹤0.01% |
6,797
+6,775
| +30,795% | +$101K |
|
|
PTRA
5085
PUT
DELISTED
Proterra Inc. Common Stock
PTRA
| $99K | ﹤0.01% |
26,300
-5,100
| -16% | -$27K |
|
|
BURU
5086
PUT
DELISTED
NUBURU INC
BURU
| $98K | ﹤0.01% |
59
-100
| -63% | -$199K |
|
5087
CALL
Cadre Holdings
CDRE
$1.31B
| $98K | ﹤0.01% |
4,900
+4,300
| +717% | +$111K |
|
|
CPRX
5088
PUT
DELISTED
Catalyst Pharmaceutical
CPRX
| $98K | ﹤0.01% |
5,300
-25,100
| -83% | -$386K |
|
5089
CALL
Genprex
GNPX
$3.06M
| $98K | ﹤0.01% |
2
| – | – |
|
5090
CALL
Healthcare Realty
HR
$7.46B
| $98K | ﹤0.01% |
5,200
-24,100
| -82% | -$473K |
|
5091
PUT
ImmunityBio
IBRX
$7.8B
| $98K | ﹤0.01% |
19,400
-59,700
| -75% | -$328K |
|
5092
PUT
Imperial Petroleum
IMPP
$212M
| $98K | ﹤0.01% |
27,333
-754
| -3% | -$4.08K |
|
|
JMIA
5093
Jumia Technologies
JMIA
$739M
| $98K | ﹤0.01% |
30,838
+25,339
| +461% | +$114K |
|
5094
CALL
MSC Industrial Direct
MSM
$6.78B
| $98K | ﹤0.01% |
1,200
-200
| -14% | -$16.3K |
|
5095
CALL
Precigen
PGEN
$2.12B
| $98K | ﹤0.01% |
64,500
+1,200
| +2% | +$2.06K |
|
5096
Stoke Therapeutics
STOK
$1.87B
| $98K | ﹤0.01% |
+10,658
| New | +$111K |
|
5097
CALL
LendingTree
TREE
$443M
| $98K | ﹤0.01% |
4,600
-49,800
| -92% | -$1.13M |
|
5098
PUT
Universal Health Services
UHS
$9.88B
| $98K | ﹤0.01% |
700
-4,000
| -85% | -$472K |
|
|
B
5099
CALL
DELISTED
Barnes Group Inc.
B
| $98K | ﹤0.01% |
2,400
+1,800
| +300% | +$67.3K |
|
|
CMAX
5100
PUT
DELISTED
CareMax, Inc. Class A Common Stock
CMAX
| $98K | ﹤0.01% |
897
-90
| -9% | -$13.5K |
|
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.