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 | |
|---|---|---|---|---|---|---|
651
CALL
NetApp
NTAP
$32.6B
| $17.1M | 0.02% |
268,400
+166,200
| +163% | +$10.7M |
|
|
AXON
652
CALL
Axon Enterprise
AXON
$39.6B
| $17.1M | 0.02% |
75,900
+32,300
| +74% | +$6.42M |
|
653
CALL
Dominion Energy
D
$62.5B
| $17.1M | 0.02% |
305,000
+191,400
| +168% | +$11.2M |
|
654
CALL
Automatic Data Processing
ADP
$97.2B
| $17M | 0.01% |
76,400
-45,000
| -37% | -$10.2M |
|
655
PUT
US Foods
USFD
$21.2B
| $17M | 0.01% |
459,100
-2,400
| -0.5% | -$89K |
|
656
CALL
Williams-Sonoma
WSM
$26.2B
| $16.9M | 0.01% |
278,400
+130,400
| +88% | +$8.14M |
|
657
CALL
MPLX
MPLX
$57.4B
| $16.9M | 0.01% |
489,700
+140,400
| +40% | +$4.82M |
|
658
PUT
Hasbro
HAS
$12.6B
| $16.9M | 0.01% |
314,200
-261,100
| -45% | -$14.9M |
|
|
659
PUT
Williams-Sonoma
WSM
$26.2B
| $16.8M | 0.01% |
276,400
+42,000
| +18% | +$2.62M |
|
660
PUT
Western Alliance Bancorporation
WAL
$9.11B
| $16.8M | 0.01% |
472,800
+469,800
| +15,660% | +$28.8M |
|
|
X
661
CALL
DELISTED
US Steel
X
| $16.8M | 0.01% |
643,500
-889,300
| -58% | -$24.7M |
|
662
PUT
Helen of Troy
HELE
$657M
| $16.8M | 0.01% |
176,400
+132,000
| +297% | +$14.1M |
|
663
CALL
DraftKings
DKNG
$11.3B
| $16.8M | 0.01% |
865,500
-2,845,000
| -77% | -$47.3M |
|
664
CALL
Apollo Global Management
APO
$68.6B
| $16.7M | 0.01% |
264,800
+53,100
| +25% | +$3.56M |
|
665
PUT
McKesson
MCK
$95.3B
| $16.7M | 0.01% |
46,900
-60,500
| -56% | -$21.9M |
|
666
PUT
Eaton
ETN
$158B
| $16.4M | 0.01% |
96,000
+43,400
| +83% | +$7.22M |
|
667
CALL
DexCom
DXCM
$27.6B
| $16.4M | 0.01% |
141,500
-113,200
| -44% | -$12.7M |
|
|
FITB
668
CALL
Fifth Third Bancorp
FITB
$52.3B
| $16.4M | 0.01% |
615,600
+537,600
| +689% | +$17.9M |
|
|
SKX
669
PUT
DELISTED
Skechers
SKX
| $16.4M | 0.01% |
344,500
+313,600
| +1,015% | +$14.2M |
|
670
PUT
Plug Power
PLUG
$3.11B
| $16.3M | 0.01% |
1,388,100
-338,800
| -20% | -$4.84M |
|
671
CALL
First Citizens BancShares
FCNCA
$24.1B
| $16.3M | 0.01% |
16,700
+14,200
| +568% | +$10.5M |
|
672
PUT
M&T Bank
MTB
$36.3B
| $16.2M | 0.01% |
135,800
+110,800
| +443% | +$16.1M |
|
673
CALL
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$108M
| $16.2M | 0.01% |
550,500
-657,600
| -54% | -$14.7M |
|
674
CALL
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
$156M
| $16.2M | 0.01% |
90,175
+35,787
| +66% | +$6.92M |
|
675
CALL
BHP
BHP
$215B
| $16.2M | 0.01% |
255,600
-29,300
| -10% | -$1.89M |
|
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.