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 | |
|---|---|---|---|---|---|---|
376
CALL
Albemarle
ALB
$13.9B
| $34.9M | 0.03% |
157,700
+35,300
| +29% | +$8.7M |
|
377
PUT
PNC Financial Services
PNC
$101B
| $34.6M | 0.03% |
272,400
+164,900
| +153% | +$24.9M |
|
378
PUT
Cleveland-Cliffs
CLF
$5.39B
| $34.6M | 0.03% |
1,885,400
+65,600
| +4% | +$1.3M |
|
379
PUT
Dow Inc
DOW
$22.5B
| $34.6M | 0.03% |
630,300
-128,300
| -17% | -$7.22M |
|
380
State Street Utilities Select Sector SPDR ETF
XLU
$23.9B
| $34.5M | 0.03% |
1,018,670
+513,516
| +102% | +$17.4M |
|
381
PUT
W.W. Grainger
GWW
$63.9B
| $34.4M | 0.03% |
50,000
+16,100
| +47% | +$10.3M |
|
382
CALL
Honeywell
HON
$73.8B
| $34.4M | 0.03% |
191,192
-101,962
| -35% | -$19.2M |
|
383
CALL
United Rentals
URI
$64.8B
| $34.3M | 0.03% |
86,700
+6,600
| +8% | +$2.77M |
|
|
384
VanEck Oil Services ETF
OIH
$2.04B
| $34.2M | 0.03% |
+123,252
| New | +$37.7M |
|
385
CALL
Illumina
ILMN
$28.9B
| $34.1M | 0.03% |
150,808
+39,578
| +36% | +$8.1M |
|
386
CALL
Phillips 66
PSX
$84.8B
| $34.1M | 0.03% |
336,000
+34,600
| +11% | +$3.52M |
|
387
PUT
CarMax
KMX
$8.15B
| $34.1M | 0.03% |
529,800
+220,000
| +71% | +$14.7M |
|
388
PUT
Cloudflare
NET
$95.5B
| $33.8M | 0.03% |
547,800
+217,200
| +66% | +$11.9M |
|
389
PUT
EOG Resources
EOG
$76.7B
| $33.7M | 0.03% |
294,200
+77,100
| +36% | +$9.35M |
|
390
CALL
RTX Corp
RTX
$262B
| $33.6M | 0.03% |
342,700
-30,700
| -8% | -$3.02M |
|
391
CALL
Kraft Heinz
KHC
$30.8B
| $33.4M | 0.03% |
864,400
-14,700
| -2% | -$582K |
|
392
PUT
Devon Energy
DVN
$51.8B
| $33.3M | 0.03% |
658,900
-241,700
| -27% | -$13.8M |
|
393
CALL
Agnico Eagle Mines
AEM
$73.5B
| $33.2M | 0.03% |
738,700
+133,900
| +22% | +$6.88M |
|
394
CALL
Constellation Brands
STZ
$22.6B
| $32.9M | 0.03% |
145,800
-31,800
| -18% | -$7.08M |
|
|
395
Citigroup
C
$222B
| $32.7M | 0.03% |
698,379
+697,379
| +69,738% | +$34.2M |
|
396
Adobe
ADBE
$86.8B
| $32.6M | 0.03% |
84,620
+68,423
| +422% | +$24.3M |
|
397
PUT
American Tower
AMT
$77.4B
| $32.5M | 0.03% |
159,200
+28,900
| +22% | +$6.06M |
|
398
CALL
Halliburton
HAL
$27.6B
| $32.5M | 0.03% |
1,026,600
+257,000
| +33% | +$9.52M |
|
399
PUT
Direxion Daily Technology Bull 3x ETF
TECL
$5.56B
| $32.4M | 0.03% |
1,423,700
+40,300
| +3% | +$1.17M |
|
400
PUT
DexCom
DXCM
$27.6B
| $32.4M | 0.03% |
278,500
+56,500
| +25% | +$6.32M |
|
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.