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 | |
|---|---|---|---|---|---|---|
4601
PUT
Astronics
ATRO
$3.21B
| $147K | ﹤0.01% |
+17,160
| New | +$127K |
|
|
CMRC
4602
PUT
Commerce.com Inc Series 1
CMRC
$272M
| $147K | ﹤0.01% |
16,900
-15,500
| -48% | -$168K |
|
4603
CALL
Banco Macro
BMA
$5.81B
| $147K | ﹤0.01% |
9,000
-8,500
| -49% | -$122K |
|
4604
ProShares UltraShort FTSE Europe
EPV
$11.6M
| $147K | ﹤0.01% |
2,314
+2,122
| +1,105% | +$157K |
|
4605
Fiverr
FVRR
$331M
| $147K | ﹤0.01% |
5,054
-21,546
| -81% | -$677K |
|
4606
CALL
Intrepid Potash
IPI
$476M
| $147K | ﹤0.01% |
5,100
-21,600
| -81% | -$800K |
|
4607
CALL
Seres Therapeutics
MCRB
$45M
| $147K | ﹤0.01% |
1,320
-3,685
| -74% | -$494K |
|
4608
PUT
SkyWater Technology
SKYT
$1.5B
| $147K | ﹤0.01% |
20,800
+9,100
| +78% | +$76.9K |
|
4609
Viridian Therapeutics
VRDN
$2.2B
| $147K | ﹤0.01% |
5,061
-6,009
| -54% | -$138K |
|
4610
CALL
Advanced Drainage Systems
WMS
$10.6B
| $147K | ﹤0.01% |
1,800
+300
| +20% | +$30.4K |
|
|
ALTU
4611
DELISTED
Altitude Acquisition Corp
ALTU
| $147K | ﹤0.01% |
14,867
+14,866
| +1,486,600% | +$148K |
|
4612
BRC Inc
BRCC
$122M
| $146K | ﹤0.01% |
23,965
+18,427
| +333% | +$120K |
|
4613
PUT
Cytokinetics
CYTK
$10.6B
| $146K | ﹤0.01% |
3,200
+1,000
| +45% | +$43K |
|
|
DADA
4614
CALL
DELISTED
Dada Nexus
DADA
| $146K | ﹤0.01% |
21,000
+16,800
| +400% | +$88K |
|
4615
CALL
Genesis Energy
GEL
$1.82B
| $146K | ﹤0.01% |
14,300
-112,600
| -89% | -$1.16M |
|
4616
Direxion Daily S&P 500 High Beta Bear 3X ETF
HIBS
$29.6M
| $146K | ﹤0.01% |
192
-92
| -32% | -$75.5K |
|
4617
PUT
Horizon Technology Finance
HRZN
$294M
| $146K | ﹤0.01% |
12,600
+11,000
| +688% | +$132K |
|
4618
CALL
RBC Bearings
RBC
$17.4B
| $146K | ﹤0.01% |
700
-200
| -22% | -$45.7K |
|
|
SEM
4619
PUT
DELISTED
Select Medical
SEM
| $146K | ﹤0.01% |
10,950
+8,723
| +392% | +$113K |
|
4620
CALL
Sprout Social
SPT
$530M
| $146K | ﹤0.01% |
2,600
-4,600
| -64% | -$270K |
|
4621
CALL
Watts Water Technologies
WTS
$11.2B
| $146K | ﹤0.01% |
1,000
+700
| +233% | +$101K |
|
4622
PUT
Willis Towers Watson
WTW
$29.8B
| $146K | ﹤0.01% |
600
+300
| +100% | +$68.5K |
|
|
NARI
4623
PUT
DELISTED
Inari Medical, Inc. Common Stock
NARI
| $146K | ﹤0.01% |
2,300
-13,500
| -85% | -$979K |
|
|
SCU
4624
PUT
DELISTED
Sculptor Capital Management, Inc. Class A Common Stock
SCU
| $146K | ﹤0.01% |
16,900
+5,100
| +43% | +$48.9K |
|
|
TCRR
4625
PUT
DELISTED
TCR2 Therapeutics Inc. Common Stock
TCRR
| $146K | ﹤0.01% |
147,000
-12,300
| -8% | -$16.6K |
|
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.