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 | |
|---|---|---|---|---|---|---|
276
PUT
CVS Health
CVS
$124B
| $50.7M | 0.04% |
682,000
+116,800
| +21% | +$9.79M |
|
277
CALL
Mercado Libre
MELI
$100B
| $50.2M | 0.04% |
38,100
-29,700
| -44% | -$33.8M |
|
278
PUT
Crocs
CROX
$5.63B
| $50.2M | 0.04% |
396,700
+89,300
| +29% | +$10.8M |
|
|
279
iShares 20+ Year Treasury Bond ETF
TLT
$47.1B
| $50.1M | 0.04% |
471,278
+312,157
| +196% | +$32.7M |
|
280
CALL
Spotify
SPOT
$112B
| $49.5M | 0.04% |
370,600
+27,700
| +8% | +$3.17M |
|
281
PUT
Delta Air Lines
DAL
$52.7B
| $49.5M | 0.04% |
1,417,700
+224,900
| +19% | +$8.34M |
|
282
CALL
Royal Caribbean
RCL
$70.9B
| $49.4M | 0.04% |
757,000
-242,000
| -24% | -$16M |
|
283
CALL
MetLife
MET
$62B
| $49.2M | 0.04% |
848,700
+365,100
| +75% | +$24.6M |
|
284
CALL
TJX Companies
TJX
$145B
| $49M | 0.04% |
625,900
+244,600
| +64% | +$19.2M |
|
285
PUT
Twilio
TWLO
$35.8B
| $49M | 0.04% |
735,900
-83,300
| -10% | -$5.14M |
|
286
CALL
Zoom
ZM
$29.6B
| $48.9M | 0.04% |
662,100
-74,100
| -10% | -$5.34M |
|
|
287
Apple
AAPL
$4.67T
| $48.7M | 0.04% |
295,137
+277,137
| +1,540% | +$40.9M |
|
|
FRC
288
PUT
DELISTED
First Republic Bank
FRC
| $48.6M | 0.04% |
3,473,400
+3,446,400
| +12,764% | +$353M |
|
289
PUT
Comcast
CMCSA
$94B
| $48.6M | 0.04% |
1,280,900
-123,300
| -9% | -$4.66M |
|
290
CALL
Snap
SNAP
$9.25B
| $48.4M | 0.04% |
4,318,500
+1,340,100
| +45% | +$14.1M |
|
291
PUT
Chewy
CHWY
$9.69B
| $47.7M | 0.04% |
1,277,400
+355,500
| +39% | +$14.7M |
|
292
CALL
Ford
F
$58.3B
| $47.4M | 0.04% |
3,764,500
-3,596,200
| -49% | -$45M |
|
|
PARA
293
PUT
DELISTED
Paramount Global Class B
PARA
| $47.4M | 0.04% |
2,123,800
+408,300
| +24% | +$8.76M |
|
294
PUT
Philip Morris
PM
$284B
| $47.2M | 0.04% |
484,900
+307,300
| +173% | +$30.6M |
|
295
PUT
Rio Tinto
RIO
$168B
| $47M | 0.04% |
685,800
+208,800
| +44% | +$15.2M |
|
296
CALL
Direxion Daily Technology Bull 3x ETF
TECL
$5.92B
| $46.8M | 0.04% |
2,443,600
+105,300
| +5% | +$3.06M |
|
297
PUT
Domino's
DPZ
$11.3B
| $46.8M | 0.04% |
141,800
+14,600
| +11% | +$4.86M |
|
298
CALL
Thermo Fisher Scientific
TMO
$227B
| $46.5M | 0.04% |
80,600
-73,700
| -48% | -$41.5M |
|
299
PUT
SLB Ltd
SLB
$85.3B
| $46.4M | 0.04% |
944,300
-188,100
| -17% | -$9.99M |
|
300
CALL
Capital One
COF
$135B
| $46.1M | 0.04% |
479,500
+219,100
| +84% | +$22.9M |
|
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.