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 | |
|---|---|---|---|---|---|---|
626
PUT
Constellation Brands
STZ
$22.6B
| $18.2M | 0.01% |
73,800
-91,300
| -55% | -$21.4M |
|
|
P
627
PUT
Everpure Inc
P
$24.8B
| $18.2M | 0.01% |
493,100
+86,700
| +21% | +$2.46M |
|
628
CALL
Fidelity National Information Services
FIS
$21B
| $18.1M | 0.01% |
330,900
+68,900
| +26% | +$3.79M |
|
629
PUT
MGM Resorts International
MGM
$11.6B
| $18.1M | 0.01% |
411,400
-445,300
| -52% | -$19M |
|
630
PUT
SAP
SAP
$174B
| $18M | 0.01% |
131,500
-25,200
| -16% | -$3.33M |
|
631
PUT
CarMax
KMX
$8.15B
| $18M | 0.01% |
214,900
-314,900
| -59% | -$23.1M |
|
632
PUT
Helen of Troy
HELE
$657M
| $18M | 0.01% |
166,400
-10,000
| -6% | -$957K |
|
633
CALL
General Mills
GIS
$19.7B
| $17.9M | 0.01% |
233,100
+137,900
| +145% | +$11.8M |
|
634
PUT
Dow Inc
DOW
$22.5B
| $17.8M | 0.01% |
334,700
-295,600
| -47% | -$15.7M |
|
635
CALL
Fortinet
FTNT
$114B
| $17.7M | 0.01% |
234,500
+23,500
| +11% | +$1.6M |
|
636
CALL
AstraZeneca
AZN
$263B
| $17.6M | 0.01% |
123,250
-41,300
| -25% | -$6.08M |
|
637
AT&T
T
$160B
| $17.6M | 0.01% |
1,104,744
+327,423
| +42% | +$5.58M |
|
638
CALL
Seagate
STX
$205B
| $17.6M | 0.01% |
284,300
| – | – |
|
639
CALL
Johnson Controls International
JCI
$86.9B
| $17.6M | 0.01% |
257,600
+231,500
| +887% | +$14.2M |
|
640
CALL
KLA
KLAC
$280B
| $17.5M | 0.01% |
361,000
-336,000
| -48% | -$14M |
|
641
PUT
BHP
BHP
$215B
| $17.5M | 0.01% |
293,700
-158,500
| -35% | -$9.45M |
|
642
CALL
Cardinal Health
CAH
$51.7B
| $17.5M | 0.01% |
184,600
+104,400
| +130% | +$8.82M |
|
643
Snowflake
SNOW
$92.8B
| $17.4M | 0.01% |
98,730
+21,878
| +28% | +$3.56M |
|
644
PUT
Wolfspeed
WOLF
$1.52B
| $17.3M | 0.01% |
312,000
+183,100
| +142% | +$9.33M |
|
645
CALL
Peabody Energy
BTU
$2.91B
| $17.3M | 0.01% |
799,300
| – | – |
|
646
CALL
Monolithic Power Systems
MPWR
$68.7B
| $17.2M | 0.01% |
31,900
+28,600
| +867% | +$13.6M |
|
647
PUT
Nucor
NUE
$53.7B
| $17.1M | 0.01% |
104,500
-88,200
| -46% | -$12.9M |
|
648
PUT
Tractor Supply
TSCO
$15.4B
| $17.1M | 0.01% |
387,000
-500
| -0.1% | -$22.9K |
|
649
PUT
Estee Lauder
EL
$29.9B
| $17.1M | 0.01% |
87,100
-41,200
| -32% | -$8.74M |
|
650
CALL
Colgate-Palmolive
CL
$73.3B
| $17M | 0.01% |
220,200
-111,500
| -34% | -$8.63M |
|
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.