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 | |
|---|---|---|---|---|---|---|
801
CALL
Veeva Systems
VEEV
$29.5B
| $12M | 0.01% |
60,700
+25,000
| +70% | +$4.56M |
|
802
CALL
AutoNation
AN
$6.85B
| $12M | 0.01% |
72,800
+8,000
| +12% | +$1.11M |
|
803
CALL
Teladoc Health
TDOC
$1.56B
| $11.9M | 0.01% |
471,500
+4,100
| +0.9% | +$103K |
|
804
CALL
CME Group
CME
$91.7B
| $11.9M | 0.01% |
64,400
-18,600
| -22% | -$3.44M |
|
805
PUT
Phillips 66
PSX
$86.2B
| $11.9M | 0.01% |
124,600
+9,700
| +8% | +$943K |
|
806
PUT
Truist Financial
TFC
$61.9B
| $11.9M | 0.01% |
391,400
-54,500
| -12% | -$1.69M |
|
|
ANSS
807
PUT
DELISTED
Ansys
ANSS
| $11.9M | 0.01% |
35,900
-10,100
| -22% | -$3.2M |
|
808
PUT
Winnebago Industries
WGO
$855M
| $11.8M | 0.01% |
177,300
+128,300
| +262% | +$7.66M |
|
809
PUT
Allegiant Air
ALGT
$2.45B
| $11.8M | 0.01% |
93,500
+88,300
| +1,698% | +$9.24M |
|
810
CALL
Live Nation Entertainment
LYV
$41.3B
| $11.8M | 0.01% |
129,600
+44,600
| +52% | +$3.48M |
|
811
PUT
monday.com
MNDY
$3.12B
| $11.8M | 0.01% |
68,900
+48,200
| +233% | +$7.2M |
|
812
CALL
Tenet Healthcare
THC
$16.7B
| $11.8M | 0.01% |
144,700
+10,800
| +8% | +$769K |
|
813
CALL
Norfolk Southern
NSC
$79.3B
| $11.8M | 0.01% |
51,900
-700
| -1% | -$149K |
|
814
PUT
Revolve Group
RVLV
$1.75B
| $11.8M | 0.01% |
716,800
+386,600
| +117% | +$7.2M |
|
|
BBBY
815
PUT
Bed Bath & Beyond
BBBY
$461M
| $11.7M | 0.01% |
396,550
+222,640
| +128% | +$4.11M |
|
816
PUT
Zions Bancorporation
ZION
$10B
| $11.7M | 0.01% |
436,800
+200,200
| +85% | +$5.55M |
|
817
PUT
NRG Energy
NRG
$29.5B
| $11.7M | 0.01% |
313,200
+191,800
| +158% | +$6.53M |
|
818
BP
BP
$114B
| $11.6M | 0.01% |
+327,723
| New | +$12.1M |
|
819
CALL
Hewlett Packard
HPE
$64.5B
| $11.5M | 0.01% |
686,500
+194,600
| +40% | +$2.98M |
|
820
CALL
Fabrinet
FN
$18.8B
| $11.5M | 0.01% |
88,700
+88,600
| +88,600% | +$9.46M |
|
821
iShares MSCI Brazil ETF
EWZ
$9.22B
| $11.5M | 0.01% |
+354,381
| New | +$10.5M |
|
822
CALL
Waste Management
WM
$95.9B
| $11.3M | 0.01% |
65,400
-67,300
| -51% | -$11.1M |
|
823
Berkshire Hathaway Class B
BRK.B
$1.05T
| $11.3M | 0.01% |
+33,093
| New | +$10.8M |
|
824
PUT
Bath & Body Works
BBWI
$3.89B
| $11.3M | 0.01% |
300,700
+262,000
| +677% | +$9.58M |
|
|
SWAV
825
PUT
DELISTED
Shockwave Medical, Inc. Common Stock
SWAV
| $11.3M | 0.01% |
39,500
+33,900
| +605% | +$9.41M |
|
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.