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 | |
|---|---|---|---|---|---|---|
|
LAC
1526
CALL
DELISTED
Lithium Americas Corp. Common Shares
LAC
| $3.16M | ﹤0.01% |
166,600
-6,600
| -4% | -$160K |
|
1527
PUT
Pacific Biosciences
PACB
$422M
| $3.15M | ﹤0.01% |
385,700
+318,500
| +474% | +$2.74M |
|
|
MRTX
1528
PUT
DELISTED
Mirati Therapeutics, Inc. Common Stock
MRTX
| $3.15M | ﹤0.01% |
69,600
+26,600
| +62% | +$1.72M |
|
1529
CALL
Welltower
WELL
$178B
| $3.15M | ﹤0.01% |
48,100
+22,400
| +87% | +$1.44M |
|
1530
PUT
Autohome
ATHM
$2.43B
| $3.14M | ﹤0.01% |
102,700
+102,100
| +17,017% | +$3.03M |
|
|
CFLT
1531
CALL
DELISTED
Confluent
CFLT
| $3.14M | ﹤0.01% |
141,300
-27,200
| -16% | -$630K |
|
1532
Cleveland-Cliffs
CLF
$6.81B
| $3.13M | ﹤0.01% |
+194,142
| New | +$2.92M |
|
1533
Enterprise Products Partners
EPD
$83.8B
| $3.13M | ﹤0.01% |
129,623
+57,345
| +79% | +$1.41M |
|
1534
Melco Resorts & Entertainment
MLCO
$2.1B
| $3.13M | ﹤0.01% |
271,811
+118,164
| +77% | +$959K |
|
1535
PUT
FLEX LNG
FLNG
$1.67B
| $3.12M | ﹤0.01% |
95,400
+73,900
| +344% | +$2.47M |
|
1536
PUT
LyondellBasell Industries
LYB
$19.5B
| $3.11M | ﹤0.01% |
37,500
-8,900
| -19% | -$729K |
|
1537
Sea Limited
SE
$61.2B
| $3.11M | ﹤0.01% |
59,793
+9,495
| +19% | +$512K |
|
1538
CALL
Labcorp
LH
$24.3B
| $3.11M | ﹤0.01% |
15,365
-1,629
| -10% | -$318K |
|
1539
Snap
SNAP
$7.32B
| $3.1M | ﹤0.01% |
+346,497
| New | +$3.42M |
|
1540
PUT
Mobileye
MBLY
$2.03B
| $3.09M | ﹤0.01% |
+88,200
| New | +$2.68M |
|
1541
CALL
Westrock Coffee
WEST
$741M
| $3.09M | ﹤0.01% |
231,500
+189,600
| +453% | +$2.26M |
|
|
SWAV
1542
DELISTED
Shockwave Medical, Inc. Common Stock
SWAV
| $3.09M | ﹤0.01% |
15,029
+3,861
| +35% | +$976K |
|
1543
CALL
Matador Resources
MTDR
$6.31B
| $3.08M | ﹤0.01% |
53,900
-19,000
| -26% | -$1.2M |
|
1544
CALL
Diageo
DEO
$46.2B
| $3.08M | ﹤0.01% |
17,300
-15,100
| -47% | -$2.65M |
|
1545
PUT
CRISPR Therapeutics
CRSP
$4.58B
| $3.08M | ﹤0.01% |
75,800
+47,800
| +171% | +$2.54M |
|
1546
CALL
Builders FirstSource
BLDR
$7.84B
| $3.08M | ﹤0.01% |
47,400
+24,500
| +107% | +$1.53M |
|
1547
CALL
iShares Gold Trust
IAU
$63B
| $3.07M | ﹤0.01% |
115,800
-37,300
| -24% | -$1.22M |
|
1548
Cencora
COR
$60.3B
| $3.07M | ﹤0.01% |
18,544
-6,134
| -25% | -$969K |
|
1549
PUT
Shake Shack
SHAK
$2.3B
| $3.07M | ﹤0.01% |
73,900
+54,300
| +277% | +$2.65M |
|
1550
PUT
Charles River Laboratories
CRL
$10.9B
| $3.05M | ﹤0.01% |
14,000
+12,200
| +678% | +$2.66M |
|
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.