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 | Miscellaneous | 98.51% |
| 2 | Technology | 0.42% |
| 3 | Consumer Discretionary | 0.2% |
| 4 | Healthcare | 0.17% |
| 5 | Industrials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1526
CALL
Cencora
COR
$63.2B
| $3.46M | ﹤0.01% |
21,600
-4,000
| -16% | -$635K |
|
|
PR
1527
CALL
Permian Resources
PR
$19.6B
| $3.45M | ﹤0.01% |
328,500
-65,300
| -17% | -$667K |
|
1528
PUT
Axos Financial
AX
$5.56B
| $3.43M | ﹤0.01% |
93,000
+4,900
| +6% | +$211K |
|
1529
CALL
Xylem
XYL
$24.7B
| $3.42M | ﹤0.01% |
32,700
+21,900
| +203% | +$2.29M |
|
1530
SoFi Technologies
SOFI
$23.5B
| $3.42M | ﹤0.01% |
563,435
+33,213
| +6% | +$201K |
|
1531
CALL
Textron
TXT
$13.6B
| $3.41M | ﹤0.01% |
48,300
-8,500
| -15% | -$606K |
|
1532
CALL
Royal Bank of Canada
RY
$292B
| $3.4M | ﹤0.01% |
35,600
-76,300
| -68% | -$7.56M |
|
1533
CALL
Vodafone
VOD
$39.1B
| $3.4M | ﹤0.01% |
308,200
-623,700
| -67% | -$7.1M |
|
1534
PUT
Cinemark Holdings
CNK
$4.06B
| $3.4M | ﹤0.01% |
229,700
+88,300
| +62% | +$1.07M |
|
1535
CALL
Infosys
INFY
$47.4B
| $3.4M | ﹤0.01% |
194,800
+165,800
| +572% | +$3.02M |
|
1536
CALL
Natera
NTRA
$47.3B
| $3.39M | ﹤0.01% |
61,100
+48,600
| +389% | +$2.33M |
|
1537
PUT
TechnipFMC
FTI
$31.3B
| $3.39M | ﹤0.01% |
248,400
-38,300
| -13% | -$519K |
|
1538
PUT
B&G Foods
BGS
$267M
| $3.38M | ﹤0.01% |
217,900
+196,200
| +904% | +$2.73M |
|
1539
PUT
Herc Holdings
HRI
$4.71B
| $3.38M | ﹤0.01% |
29,700
+29,600
| +29,600% | +$4.08M |
|
1540
CALL
Halozyme
HALO
$12.5B
| $3.38M | ﹤0.01% |
88,500
+43,400
| +96% | +$2.04M |
|
|
HUT
1541
CALL
Hut 8
HUT
$11.5B
| $3.37M | ﹤0.01% |
364,860
+142,400
| +64% | +$1.21M |
|
1542
PUT
Mettler-Toledo International
MTD
$27B
| $3.37M | ﹤0.01% |
2,200
-2,000
| -48% | -$3M |
|
|
ABB
1543
CALL
DELISTED
ABB Ltd
ABB
| $3.36M | ﹤0.01% |
98,100
+15,300
| +18% | +$513K |
|
1544
CALL
Under Armour Class C
UA
$2.2B
| $3.35M | ﹤0.01% |
359,700
-169,100
| -32% | -$1.55M |
|
1545
CALL
Crown Holdings
CCK
$12.5B
| $3.34M | ﹤0.01% |
40,400
-40,900
| -50% | -$3.46M |
|
1546
PUT
Sigma Lithium
SGML
$1.39B
| $3.33M | ﹤0.01% |
88,500
+61,700
| +230% | +$1.98M |
|
|
HZNP
1547
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
| $3.33M | ﹤0.01% |
30,506
-8,287
| -21% | -$916K |
|
|
TIGR
1548
CALL
UP Fintech Holding
TIGR
$914M
| $3.33M | ﹤0.01% |
999,300
+368,800
| +58% | +$1.36M |
|
|
1549
CALL
Cinemark Holdings
CNK
$4.06B
| $3.33M | ﹤0.01% |
224,900
+23,300
| +12% | +$283K |
|
1550
PUT
Welltower
WELL
$170B
| $3.33M | ﹤0.01% |
46,400
-206,800
| -82% | -$15M |
|
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's Q1 2023 filing shows 1,536 new, 3,663 increased, 3,631 reduced and 1,728 closed positions. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M. The largest sale was Amazon, an estimated $189M.
By sector, the portfolio is most concentrated in Miscellaneous at 99% of assets, up from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- 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 1,728 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.