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 | |
|---|---|---|---|---|---|---|
3426
Envista
NVST
$4.38B
| $394K | ﹤0.01% |
+11,705
| New | +$400K |
|
3427
InterDigital
IDCC
$6.75B
| $393K | ﹤0.01% |
7,948
+6,093
| +328% | +$297K |
|
|
SMAR
3428
PUT
DELISTED
Smartsheet Inc.
SMAR
| $393K | ﹤0.01% |
10,000
-7,100
| -42% | -$242K |
|
3429
CALL
CDW
CDW
$18.2B
| $392K | ﹤0.01% |
2,200
-3,600
| -62% | -$633K |
|
|
3430
PUT
CDW
CDW
$18.2B
| $392K | ﹤0.01% |
2,200
-17,400
| -89% | -$3.06M |
|
3431
PUT
Altisource Portfolio Solutions
ASPS
$61.9M
| $391K | ﹤0.01% |
5,175
+3,762
| +266% | +$390K |
|
3432
PUT
Geron
GERN
$924M
| $391K | ﹤0.01% |
161,700
+101,100
| +167% | +$226K |
|
3433
CALL
RadNet
RDNT
$4.93B
| $391K | ﹤0.01% |
20,800
+11,200
| +117% | +$209K |
|
3434
CALL
Xerox
XRX
$358M
| $391K | ﹤0.01% |
26,800
-7,700
| -22% | -$116K |
|
3435
Ramaco Resources Class A
METC
$632M
| $390K | ﹤0.01% |
45,874
+45,124
| +6,017% | +$456K |
|
3436
iShares MSCI South Korea ETF
EWY
$21.5B
| $389K | ﹤0.01% |
6,895
-19,923
| -74% | -$1.09M |
|
3437
GXO Logistics
GXO
$6.17B
| $389K | ﹤0.01% |
9,127
-13,362
| -59% | -$536K |
|
3438
Netflix
NFLX
$305B
| $389K | ﹤0.01% |
13,200
| – | – |
|
|
RDUS
3439
CALL
DELISTED
Radius Recycling
RDUS
| $389K | ﹤0.01% |
12,700
+11,100
| +694% | +$343K |
|
3440
CALL
Mohawk Industries
MHK
$7.21B
| $388K | ﹤0.01% |
3,800
-800
| -17% | -$78.5K |
|
3441
PUT
Lamar Advertising Co
LAMR
$16.4B
| $387K | ﹤0.01% |
4,100
-11,000
| -73% | -$1.02M |
|
3442
PUT
Meritage Homes
MTH
$5B
| $387K | ﹤0.01% |
8,400
-1,200
| -13% | -$48.5K |
|
3443
PUT
Extreme Networks
EXTR
$3.89B
| $386K | ﹤0.01% |
21,100
-42,200
| -67% | -$739K |
|
3444
CALL
FB Financial Corp
FBK
$2.99B
| $386K | ﹤0.01% |
10,700
+5,700
| +114% | +$228K |
|
3445
CALL
Genius Sports
GENI
$2B
| $386K | ﹤0.01% |
108,300
+21,400
| +25% | +$94K |
|
3446
iShares S&P 100 ETF
OEF
$19.9B
| $385K | ﹤0.01% |
2,261
+879
| +64% | +$152K |
|
|
ORC
3447
CALL
Orchid Island Capital
ORC
$1.31B
| $385K | ﹤0.01% |
36,700
-13,200
| -26% | -$135K |
|
3448
SS&C Technologies
SSNC
$18.9B
| $385K | ﹤0.01% |
7,397
-45,963
| -86% | -$2.33M |
|
3449
PUT
Vulcan Materials
VMC
$37.2B
| $385K | ﹤0.01% |
2,200
-13,800
| -86% | -$2.36M |
|
3450
PUT
HighPeak Energy
HPK
$819M
| $384K | ﹤0.01% |
16,800
+15,800
| +1,580% | +$355K |
|
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.