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 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
676
PUT
Sunrun
RUN
$2.61B
| $16.2M | 0.01% |
801,800
+221,900
| +38% | +$5.18M |
|
677
CALL
Expedia Group
EXPE
$31.3B
| $16.1M | 0.01% |
166,400
-137,000
| -45% | -$14.4M |
|
678
PUT
Kraft Heinz
KHC
$30.8B
| $16.1M | 0.01% |
416,700
-414,100
| -50% | -$16.4M |
|
679
Roku
ROKU
$21.2B
| $15.9M | 0.01% |
241,991
+207,373
| +599% | +$12.1M |
|
680
CALL
CME Group
CME
$90.1B
| $15.9M | 0.01% |
83,000
+6,900
| +9% | +$1.25M |
|
|
SCIU
681
CALL
DELISTED
Global X Scientific Beta US ETF
SCIU
| $15.8M | 0.01% |
540,800
-33,200
| -6% | -$969K |
|
682
CALL
Bank of Montreal
BMO
$125B
| $15.8M | 0.01% |
176,800
-23,000
| -12% | -$2.18M |
|
683
Walt Disney
DIS
$166B
| $15.8M | 0.01% |
157,334
-21,065
| -12% | -$2.12M |
|
684
CALL
Vale
VALE
$63.2B
| $15.7M | 0.01% |
995,100
-710,900
| -42% | -$12M |
|
685
CALL
Advance Auto Parts
AAP
$3.35B
| $15.7M | 0.01% |
129,100
+59,000
| +84% | +$8.26M |
|
686
PUT
Illumina
ILMN
$28.9B
| $15.7M | 0.01% |
69,287
-74,325
| -52% | -$15.2M |
|
687
PUT
Intuitive Surgical
ISRG
$122B
| $15.6M | 0.01% |
61,200
-112,800
| -65% | -$27.8M |
|
688
CALL
Canadian Natural Resources
CNQ
$95.5B
| $15.6M | 0.01% |
563,600
+204,800
| +57% | +$5.8M |
|
689
PUT
Peloton Interactive
PTON
$2.71B
| $15.5M | 0.01% |
1,367,100
-628,600
| -31% | -$7.56M |
|
690
CALL
L3Harris
LHX
$53.1B
| $15.4M | 0.01% |
78,700
+17,400
| +28% | +$3.56M |
|
|
HES
691
CALL
DELISTED
Hess
HES
| $15.4M | 0.01% |
116,100
-58,200
| -33% | -$8.1M |
|
692
CALL
American Electric Power
AEP
$72.4B
| $15.4M | 0.01% |
168,800
+2,300
| +1% | +$210K |
|
693
PUT
Equifax
EFX
$20B
| $15.3M | 0.01% |
75,500
-1,400
| -2% | -$291K |
|
|
ANSS
694
PUT
DELISTED
Ansys
ANSS
| $15.3M | 0.01% |
46,000
+16,600
| +56% | +$4.68M |
|
695
CALL
Pultegroup
PHM
$24.1B
| $15.3M | 0.01% |
262,600
+110,300
| +72% | +$5.96M |
|
696
PUT
BILL Holdings
BILL
$4.17B
| $15.2M | 0.01% |
187,700
+50,600
| +37% | +$4.69M |
|
697
PUT
Truist Financial
TFC
$63.2B
| $15.2M | 0.01% |
445,900
+390,600
| +706% | +$17.1M |
|
698
PUT
Teva Pharmaceuticals
TEVA
$35.1B
| $15.2M | 0.01% |
1,711,900
+285,600
| +20% | +$2.82M |
|
699
CALL
Corning
GLW
$133B
| $15.1M | 0.01% |
428,900
-19,600
| -4% | -$682K |
|
700
PUT
Scorpio Tankers
STNG
$3.9B
| $15.1M | 0.01% |
268,000
+63,500
| +31% | +$3.47M |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.