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 | |
|---|---|---|---|---|---|---|
3051
PUT
Tandem Diabetes Care
TNDM
$1.18B
| $557K | ﹤0.01% |
12,400
+3,000
| +32% | +$136K |
|
3052
PUT
Vanguard Short-Term Treasury ETF
VGSH
$29.3B
| $556K | ﹤0.01% |
9,300
-54,500
| -85% | -$3.15M |
|
|
XM
3053
DELISTED
Qualtrics International Inc. Class A Common Stock
XM
| $556K | ﹤0.01% |
53,609
-37,329
| -41% | -$391K |
|
|
JJT
3054
CALL
DELISTED
iPath Series B Bloomberg Tin Subindex Total ReturnSM ETN
JJT
| $556K | ﹤0.01% |
15,100
+2,300
| +18% | +$155K |
|
3055
PUT
Adient
ADNT
$1.62B
| $555K | ﹤0.01% |
16,000
+11,900
| +290% | +$416K |
|
3056
Golar LNG
GLNG
$4.99B
| $554K | ﹤0.01% |
24,347
+19,568
| +409% | +$490K |
|
3057
Icon
ICLR
$13B
| $553K | ﹤0.01% |
2,847
+2,822
| +11,288% | +$560K |
|
3058
Public Storage
PSA
$60.5B
| $552K | ﹤0.01% |
1,971
-191
| -9% | -$55.7K |
|
|
GAP
3059
The Gap Inc
GAP
$7.07B
| $552K | ﹤0.01% |
+48,984
| New | +$586K |
|
|
BMTX
3060
CALL
DELISTED
BM Technologies, Inc.
BMTX
| $552K | ﹤0.01% |
106,000
+87,300
| +467% | +$557K |
|
3061
PUT
American Vanguard Corp
AVD
$75.2M
| $551K | ﹤0.01% |
25,400
-1,800
| -7% | -$40.1K |
|
3062
PUT
Bloomin' Brands
BLMN
$731M
| $551K | ﹤0.01% |
27,400
-9,200
| -25% | -$199K |
|
3063
PUT
International Money Express
IMXI
$386M
| $550K | ﹤0.01% |
22,600
-37,300
| -62% | -$856K |
|
|
SGEN
3064
DELISTED
Seagen Inc. Common Stock
SGEN
| $550K | ﹤0.01% |
4,286
-3,307
| -44% | -$427K |
|
3065
PUT
Equity Lifestyle Properties
ELS
$12.6B
| $549K | ﹤0.01% |
8,500
+6,500
| +325% | +$412K |
|
3066
PUT
FMC
FMC
$1.39B
| $549K | ﹤0.01% |
4,400
-2,200
| -33% | -$270K |
|
3067
MongoDB
MDB
$24.9B
| $549K | ﹤0.01% |
2,790
-11,179
| -80% | -$1.99M |
|
3068
PUT
monday.com
MNDY
$3.47B
| $549K | ﹤0.01% |
4,500
-28,900
| -87% | -$3.01M |
|
3069
CALL
Plains GP Holdings
PAGP
$5.16B
| $549K | ﹤0.01% |
44,200
-27,100
| -38% | -$338K |
|
|
HTGCR
3070
CALL
DELISTED
HERCULES TECHNOLOGY GROWTH CAP INC TRANS RGTS TO PUR COM STK
HTGCR
| $548K | ﹤0.01% |
41,500
-17,200
| -29% | -$227K |
|
3071
Cognizant
CTSH
$22.3B
| $547K | ﹤0.01% |
+9,566
| New | +$561K |
|
3072
CALL
IDEX
IEX
$16.6B
| $547K | ﹤0.01% |
2,400
+1,300
| +118% | +$291K |
|
3073
Magnachip Semiconductor
MX
$126M
| $547K | ﹤0.01% |
+58,303
| New | +$564K |
|
3074
PUT
Rithm Capital
RITM
$5.15B
| $547K | ﹤0.01% |
67,000
-113,500
| -63% | -$947K |
|
3075
PUT
Ituran Location and Control
ITRN
$1.09B
| $545K | ﹤0.01% |
25,800
-6,600
| -20% | -$151K |
|
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.