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 |
Microsoft
MSFT
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
Starbucks
SBUX
|
+$26.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Healthcare | 0.21% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.2% |
| 5 | Financials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
476
PUT
Skyworks Solutions
SWKS
$9.5B
| $25.8M | 0.02% |
233,400
+148,600
| +175% | +$15.7M |
|
477
PUT
Prudential Financial
PRU
$41.3B
| $25.8M | 0.02% |
292,700
-9,000
| -3% | -$753K |
|
478
CALL
Electronic Arts
EA
$52.4B
| $25.7M | 0.02% |
198,300
+27,100
| +16% | +$3.43M |
|
479
CALL
AutoZone
AZO
$48.5B
| $25.7M | 0.02% |
10,300
+2,500
| +32% | +$6.38M |
|
480
Procter & Gamble
PG
$347B
| $25.7M | 0.02% |
+169,060
| New | +$25.5M |
|
481
iShares China Large-Cap ETF
FXI
$4.29B
| $25.6M | 0.02% |
941,085
+621,783
| +195% | +$17.4M |
|
|
B
482
PUT
Barrick Mining
B
$62.8B
| $25.5M | 0.02% |
1,503,700
+43,300
| +3% | +$789K |
|
|
P
483
CALL
Everpure Inc
P
$24.8B
| $25.4M | 0.02% |
689,900
+148,100
| +27% | +$4.2M |
|
484
CALL
APA Corp
APA
$12.8B
| $25.3M | 0.02% |
740,100
+429,000
| +138% | +$15M |
|
485
PUT
MetLife
MET
$60B
| $25.3M | 0.02% |
447,200
-345,900
| -44% | -$19.2M |
|
486
Qualcomm
QCOM
$185B
| $25.2M | 0.02% |
+212,035
| New | +$24.4M |
|
487
Bank of America
BAC
$432B
| $25.2M | 0.02% |
+878,773
| New | +$25.1M |
|
488
PUT
Analog Devices
ADI
$188B
| $25.2M | 0.02% |
129,400
-2,500
| -2% | -$463K |
|
489
PUT
Align Technology
ALGN
$12.4B
| $25.1M | 0.02% |
71,100
-63,400
| -47% | -$20.2M |
|
490
PUT
Western Digital
WDC
$192B
| $25.1M | 0.02% |
876,091
+70,913
| +9% | +$1.97M |
|
491
PUT
Invesco Aerospace & Defense ETF
PPA
$8.03B
| $25.1M | 0.02% |
174,700
+117,700
| +206% | +$9.5M |
|
|
ATVI
492
PUT
DELISTED
Activision Blizzard
ATVI
| $25.1M | 0.02% |
297,300
-351,100
| -54% | -$28.4M |
|
493
PUT
The Mosaic Company
MOS
$7.24B
| $25M | 0.02% |
714,000
+251,700
| +54% | +$9.73M |
|
494
CALL
Northrop Grumman
NOC
$74.6B
| $25M | 0.02% |
54,800
+3,200
| +6% | +$1.45M |
|
495
PUT
Proshares UltraShort Technology
REW
$3.3M
| $24.9M | 0.02% |
167,200
-141,588
| -46% | -$14.3M |
|
496
CALL
iShares Gold Trust
IAU
$64.2B
| $24.7M | 0.02% |
678,800
+59,500
| +10% | +$2.23M |
|
497
CALL
Kraft Heinz
KHC
$30.8B
| $24.7M | 0.02% |
695,800
-168,600
| -20% | -$6.49M |
|
498
PUT
Chewy
CHWY
$8.81B
| $24.3M | 0.02% |
616,700
-660,700
| -52% | -$23M |
|
499
PUT
Caesars Entertainment
CZR
$6.1B
| $24.3M | 0.02% |
477,000
-21,600
| -4% | -$981K |
|
500
CALL
Marathon Digital Holdings
MARA
$4.73B
| $24.3M | 0.02% |
1,754,000
-539,300
| -24% | -$5.43M |
|
Similar funds
Simplex Trading's Q2 2023 Portfolio in Review
As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
- Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
- Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
- Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
- Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
- Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.
Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.