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 | |
|---|---|---|---|---|---|---|
451
CALL
Verizon
VZ
$185B
| $28.1M | 0.02% |
721,900
-474,900
| -40% | -$18.7M |
|
452
CALL
Wayfair
W
$11.1B
| $27.9M | 0.02% |
813,500
+347,000
| +74% | +$15.4M |
|
453
CALL
Biogen
BIIB
$29.2B
| $27.9M | 0.02% |
100,300
-158,200
| -61% | -$43.8M |
|
454
CALL
Intuitive Surgical
ISRG
$121B
| $27.9M | 0.02% |
109,100
-261,000
| -71% | -$64.3M |
|
455
CALL
KLA
KLAC
$280B
| $27.8M | 0.02% |
697,000
+160,000
| +30% | +$6.31M |
|
456
PUT
American International
AIG
$41.5B
| $27.7M | 0.02% |
549,400
+418,100
| +318% | +$24.4M |
|
457
PUT
Amgen
AMGN
$198B
| $27.6M | 0.02% |
114,200
-106,400
| -48% | -$26.1M |
|
458
Alibaba
BABA
$279B
| $27.5M | 0.02% |
268,719
+6,128
| +2% | +$614K |
|
459
PUT
Shell
SHEL
$243B
| $27.4M | 0.02% |
476,400
+113,200
| +31% | +$6.66M |
|
460
PUT
Marriott International
MAR
$97.5B
| $27.3M | 0.02% |
164,600
+63,100
| +62% | +$10.5M |
|
461
State Street Energy Select Sector SPDR ETF
XLE
$39.2B
| $27.3M | 0.02% |
+658,104
| New | +$28.1M |
|
462
CALL
Dollar General
DG
$26.5B
| $27.2M | 0.02% |
129,200
-23,100
| -15% | -$5.19M |
|
463
Enphase Energy
ENPH
$5.22B
| $27.2M | 0.02% |
+129,302
| New | +$28M |
|
464
PUT
US Bancorp Series B Preferred Stock
USB.PRH
$747M
| $27.1M | 0.02% |
752,600
+631,700
| +522% | +$12.7M |
|
465
PUT
DoorDash
DASH
$77.4B
| $27.1M | 0.02% |
426,800
+101,500
| +31% | +$5.82M |
|
|
B
466
PUT
Barrick Mining
B
$62.8B
| $27.1M | 0.02% |
1,460,400
-1,032,200
| -41% | -$18.5M |
|
467
CALL
The Mosaic Company
MOS
$7.24B
| $27.1M | 0.02% |
599,100
+302,500
| +102% | +$14.6M |
|
468
PUT
Invesco DB US Dollar Index Bullish Fund
UUP
$432M
| $27M | 0.02% |
1,010,200
+94,100
| +10% | +$2.63M |
|
469
CALL
NextEra Energy
NEE
$186B
| $26.9M | 0.02% |
349,500
-303,200
| -46% | -$23.3M |
|
470
CALL
Diamondback Energy
FANG
$57.1B
| $26.9M | 0.02% |
199,000
-200,900
| -50% | -$28M |
|
471
PUT
ProShares UltraShort Health Care
RXD
$3.38M
| $26.9M | 0.02% |
540,750
-133,450
| -20% | -$3.43M |
|
|
WWE
472
PUT
DELISTED
World Wrestling Entertainment
WWE
| $26.8M | 0.02% |
293,800
+261,700
| +815% | +$22.4M |
|
473
CALL
Dick's Sporting Goods
DKS
$18.8B
| $26.7M | 0.02% |
188,000
+124,600
| +197% | +$16.6M |
|
474
PUT
Fidelity National Information Services
FIS
$21B
| $26.6M | 0.02% |
488,900
+346,700
| +244% | +$22.6M |
|
475
CALL
Toronto Dominion Bank
TD
$200B
| $26.5M | 0.02% |
443,000
+80,400
| +22% | +$5.19M |
|
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.