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 | |
|---|---|---|---|---|---|---|
776
PUT
AB InBev
BUD
$155B
| $12.4M | 0.01% |
219,100
+66,200
| +43% | +$4M |
|
777
CALL
MGM Resorts International
MGM
$11.5B
| $12.4M | 0.01% |
282,600
-372,300
| -57% | -$15.9M |
|
|
BBBY
778
CALL
Bed Bath & Beyond
BBBY
$461M
| $12.4M | 0.01% |
418,550
+110,660
| +36% | +$2.04M |
|
|
SCIU
779
PUT
DELISTED
Global X Scientific Beta US ETF
SCIU
| $12.4M | 0.01% |
317,800
-133,700
| -30% | -$5.21M |
|
780
CALL
Equinor
EQNR
$98.5B
| $12.4M | 0.01% |
423,400
-264,300
| -38% | -$7.53M |
|
781
PUT
Beyond Meat
BYND
$296M
| $12.3M | 0.01% |
950,000
+252,000
| +36% | +$3.2M |
|
782
CALL
Truist Financial
TFC
$61.9B
| $12.3M | 0.01% |
405,300
-185,700
| -31% | -$5.77M |
|
783
PUT
Illumina
ILMN
$29.6B
| $12.3M | 0.01% |
67,437
-1,850
| -3% | -$374K |
|
784
PUT
Enovix
ENVX
$975M
| $12.3M | 0.01% |
778,286
+496,115
| +176% | +$5.77M |
|
785
CALL
Old Dominion Freight Line
ODFL
$47.7B
| $12.3M | 0.01% |
66,400
+49,600
| +295% | +$8.03M |
|
786
CALL
Aflac
AFL
$62.9B
| $12.3M | 0.01% |
175,600
-46,400
| -21% | -$3.11M |
|
787
PUT
Affirm
AFRM
$23.7B
| $12.3M | 0.01% |
799,200
-136,800
| -15% | -$1.81M |
|
788
Roku
ROKU
$21.1B
| $12.2M | 0.01% |
191,475
-50,516
| -21% | -$3.07M |
|
789
PUT
SL Green Realty
SLG
$3.82B
| $12.2M | 0.01% |
407,200
+190,800
| +88% | +$4.61M |
|
790
PUT
AutoNation
AN
$6.85B
| $12.2M | 0.01% |
74,200
-5,400
| -7% | -$749K |
|
|
ATVI
791
DELISTED
Activision Blizzard
ATVI
| $12.2M | 0.01% |
144,682
+14,531
| +11% | +$1.18M |
|
792
PUT
Altria Group
MO
$121B
| $12.2M | 0.01% |
268,300
-279,500
| -51% | -$12.7M |
|
793
PUT
eBay
EBAY
$48.1B
| $12.1M | 0.01% |
271,500
+140,300
| +107% | +$6.23M |
|
794
CALL
Cigna
CI
$75.6B
| $12.1M | 0.01% |
43,200
-45,600
| -51% | -$11.9M |
|
795
CALL
Alcoa
AA
$12B
| $12.1M | 0.01% |
355,800
-166,600
| -32% | -$6.05M |
|
796
CALL
Duke Energy
DUK
$100B
| $12.1M | 0.01% |
134,400
-161,100
| -55% | -$15.2M |
|
797
PUT
Invesco DB US Dollar Index Bullish Fund
UUP
$434M
| $12.1M | 0.01% |
468,100
-542,100
| -54% | -$15.2M |
|
|
PXD
798
CALL
DELISTED
Pioneer Natural Resource Co.
PXD
| $12M | 0.01% |
58,100
+2,000
| +4% | +$421K |
|
799
PUT
DuPont de Nemours
DD
$18.6B
| $12M | 0.01% |
134,159
-93,608
| -41% | -$8.05M |
|
800
CALL
monday.com
MNDY
$3.12B
| $12M | 0.01% |
70,200
+57,000
| +432% | +$8.52M |
|
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.