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 | |
|---|---|---|---|---|---|---|
1651
CALL
Alpha Metallurgical Resources
AMR
$1.82B
| $2.66M | ﹤0.01% |
18,200
-3,800
| -17% | -$600K |
|
1652
PUT
Sabre
SABR
$656M
| $2.66M | ﹤0.01% |
431,200
-67,000
| -13% | -$374K |
|
|
QLTB
1653
CALL
DELISTED
ISHARES BAA BA RATED CORP BOND FUND
QLTB
| $2.66M | ﹤0.01% |
27,300
+22,200
| +435% | +$2.16M |
|
|
ATCO
1654
CALL
DELISTED
Atlas Corp.
ATCO
| $2.66M | ﹤0.01% |
173,200
-17,700
| -9% | -$267K |
|
1655
CALL
Regions Financial
RF
$26.3B
| $2.65M | ﹤0.01% |
122,900
-5,400
| -4% | -$117K |
|
1656
CALL
Lumentum
LITE
$59.4B
| $2.65M | ﹤0.01% |
50,700
-31,700
| -38% | -$1.95M |
|
1657
PUT
Olin
OLN
$2.64B
| $2.64M | ﹤0.01% |
49,900
-23,300
| -32% | -$1.24M |
|
|
LAC
1658
PUT
DELISTED
Lithium Americas Corp. Common Shares
LAC
| $2.64M | ﹤0.01% |
139,200
-136,700
| -50% | -$3.32M |
|
1659
CALL
Ericsson
ERIC
$30.7B
| $2.63M | ﹤0.01% |
450,200
-78,000
| -15% | -$469K |
|
1660
PUT
Monster Beverage
MNST
$91.4B
| $2.63M | ﹤0.01% |
51,800
-53,200
| -51% | -$2.58M |
|
1661
Blackstone
BX
$104B
| $2.63M | ﹤0.01% |
35,424
-173,775
| -83% | -$15M |
|
1662
CALL
Owens Corning
OC
$11.5B
| $2.62M | ﹤0.01% |
30,700
+26,100
| +567% | +$2.29M |
|
|
HCP
1663
PUT
DELISTED
HashiCorp, Inc. Class A Common Stock
HCP
| $2.61M | ﹤0.01% |
95,400
+27,400
| +40% | +$776K |
|
1664
CALL
GitLab
GTLB
$5.28B
| $2.6M | ﹤0.01% |
132,500
+113,900
| +612% | +$5.14M |
|
1665
PUT
Boston Beer
SAM
$1.88B
| $2.6M | ﹤0.01% |
7,900
-1,900
| -19% | -$689K |
|
1666
American Water Works
AWK
$26.3B
| $2.59M | ﹤0.01% |
17,020
+9,087
| +115% | +$1.31M |
|
1667
CALL
Jacobs Solutions
J
$15.9B
| $2.59M | ﹤0.01% |
26,114
+19,223
| +279% | +$1.89M |
|
1668
CALL
Papa John's
PZZA
$999M
| $2.59M | ﹤0.01% |
31,500
+14,800
| +89% | +$1.16M |
|
1669
Spotify
SPOT
$99.2B
| $2.59M | ﹤0.01% |
+32,810
| New | +$2.65M |
|
1670
State Street
STT
$50.9B
| $2.59M | ﹤0.01% |
33,384
+16,426
| +97% | +$1.21M |
|
|
AQUA
1671
CALL
DELISTED
Evoqua Water Technologies Corp. Common Stock
AQUA
| $2.59M | ﹤0.01% |
65,400
+60,300
| +1,182% | +$2.37M |
|
1672
CALL
C3.ai
AI
$1.27B
| $2.58M | ﹤0.01% |
230,800
-18,000
| -7% | -$225K |
|
1673
CALL
TransDigm Group
TDG
$69.2B
| $2.58M | ﹤0.01% |
4,100
-7,500
| -65% | -$4.42M |
|
1674
CALL
Quanta Services
PWR
$93.9B
| $2.58M | ﹤0.01% |
18,100
-24,900
| -58% | -$3.54M |
|
1675
Vanguard S&P 500 ETF
VOO
$968B
| $2.58M | ﹤0.01% |
7,332
-31,521
| -81% | -$11.1M |
|
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.