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 | |
|---|---|---|---|---|---|---|
476
PUT
DexCom
DXCM
$27.6B
| $25.1M | 0.03% |
222,000
+32,200
| +17% | +$3.54M |
|
477
PUT
Colgate-Palmolive
CL
$73.3B
| $25.1M | 0.03% |
318,900
-72,000
| -18% | -$5.4M |
|
478
PUT
Vale
VALE
$63.2B
| $25.1M | 0.03% |
1,480,300
-362,900
| -20% | -$5.46M |
|
479
CALL
GameStop
GME
$9.69B
| $25.1M | 0.03% |
1,360,500
-304,700
| -18% | -$7.48M |
|
480
PUT
State Street SPDR Portfolio Europe ETF
SPEU
$718M
| $25M | 0.03% |
639,000
+88,200
| +16% | +$2.91M |
|
481
CALL
S&P Global
SPGI
$127B
| $25M | 0.03% |
74,600
+25,600
| +52% | +$8.44M |
|
482
CALL
McKesson
MCK
$95.3B
| $24.8M | 0.03% |
66,100
-11,000
| -14% | -$4.1M |
|
483
PUT
Southwest Airlines
LUV
$23.3B
| $24.8M | 0.03% |
735,700
+327,600
| +80% | +$11.8M |
|
|
MRO
484
CALL
DELISTED
Marathon Oil Corporation
MRO
| $24.7M | 0.03% |
913,600
-158,500
| -15% | -$4.6M |
|
|
HES
485
CALL
DELISTED
Hess
HES
| $24.7M | 0.03% |
174,300
+15,100
| +9% | +$2.07M |
|
486
CALL
Whirlpool
WHR
$2.41B
| $24.6M | 0.03% |
174,000
+148,800
| +590% | +$21.2M |
|
487
CALL
Dollar Tree
DLTR
$23.5B
| $24.6M | 0.03% |
173,600
-7,000
| -4% | -$1.04M |
|
488
PUT
Skyworks Solutions
SWKS
$9.5B
| $24.5M | 0.03% |
269,100
+10,800
| +4% | +$968K |
|
489
PUT
Marvell Technology
MRVL
$189B
| $24.4M | 0.03% |
659,000
-241,300
| -27% | -$9.85M |
|
490
CALL
Suncor Energy
SU
$76.4B
| $24.2M | 0.03% |
763,500
+85,700
| +13% | +$2.82M |
|
491
CALL
Capital One
COF
$124B
| $24.2M | 0.03% |
260,400
-26,500
| -9% | -$2.61M |
|
492
CALL
American Tower
AMT
$77.4B
| $24.2M | 0.03% |
114,000
+34,800
| +44% | +$7.24M |
|
493
CALL
Antero Resources
AR
$10.9B
| $24.1M | 0.03% |
778,900
-294,100
| -27% | -$10.2M |
|
494
PUT
Bilibili
BILI
$7.4B
| $24.1M | 0.03% |
1,016,000
+566,200
| +126% | +$9.01M |
|
495
CALL
iShares Core MSCI Emerging Markets ETF
IEMG
$153B
| $24M | 0.03% |
546,000
-30,900
| -5% | -$1.41M |
|
496
CALL
AstraZeneca
AZN
$263B
| $23.9M | 0.03% |
176,400
+38,950
| +28% | +$4.88M |
|
497
PUT
Caesars Entertainment
CZR
$6.1B
| $23.8M | 0.03% |
572,000
+158,200
| +38% | +$7.04M |
|
498
CALL
Align Technology
ALGN
$12.4B
| $23.6M | 0.03% |
111,800
+31,200
| +39% | +$6.25M |
|
499
CALL
Toronto Dominion Bank
TD
$200B
| $23.5M | 0.03% |
362,600
+23,100
| +7% | +$1.49M |
|
|
500
CALL
Caesars Entertainment
CZR
$6.1B
| $23.4M | 0.03% |
562,800
+217,700
| +63% | +$9.69M |
|
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.