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 | |
|---|---|---|---|---|---|---|
526
Verizon
VZ
$185B
| $23.4M | 0.02% |
602,014
+228,197
| +61% | +$9M |
|
527
PUT
Digital Realty Trust
DLR
$66B
| $23.4M | 0.02% |
238,100
+7,300
| +3% | +$770K |
|
528
CALL
Linde
LIN
$235B
| $23.4M | 0.02% |
65,800
-2,000
| -3% | -$670K |
|
529
CALL
Sarepta Therapeutics
SRPT
$1.67B
| $23.2M | 0.02% |
168,500
+56,900
| +51% | +$7.38M |
|
530
CALL
iShares Gold Trust
IAU
$64.2B
| $23.1M | 0.02% |
619,300
+503,500
| +435% | +$18.1M |
|
531
PUT
Unity
U
$12.8B
| $23.1M | 0.02% |
710,900
+14,100
| +2% | +$453K |
|
532
CALL
Antero Resources
AR
$10.9B
| $23.1M | 0.02% |
998,300
+219,400
| +28% | +$5.78M |
|
533
PUT
Western Digital
WDC
$192B
| $22.9M | 0.02% |
805,178
+39,955
| +5% | +$1.17M |
|
534
PUT
Palantir
PLTR
$299B
| $22.9M | 0.02% |
2,704,600
-278,300
| -9% | -$2.18M |
|
535
CALL
AstraZeneca
AZN
$263B
| $22.8M | 0.02% |
164,550
-11,850
| -7% | -$1.59M |
|
536
PUT
NIO
NIO
$11.7B
| $22.8M | 0.02% |
2,172,700
+730,300
| +51% | +$7.47M |
|
537
CALL
Cigna
CI
$75.4B
| $22.7M | 0.02% |
88,800
-50,800
| -36% | -$14.8M |
|
538
PUT
Bilibili
BILI
$7.4B
| $22.7M | 0.02% |
964,000
-52,000
| -5% | -$1.24M |
|
539
PUT
Apollo Global Management
APO
$68.6B
| $22.5M | 0.02% |
356,700
+194,000
| +119% | +$13M |
|
540
CALL
AMC Entertainment Holdings
AMC
$2.01B
| $22.5M | 0.02% |
467,510
-101,550
| -18% | -$5.38M |
|
541
iShares MSCI Emerging Markets ETF
EEM
$28.8B
| $22.3M | 0.02% |
566,385
-366,371
| -39% | -$14.6M |
|
542
CALL
eBay
EBAY
$49.3B
| $22.3M | 0.02% |
502,800
-358,600
| -42% | -$16.4M |
|
543
PUT
KB Home
KBH
$3.46B
| $22.3M | 0.02% |
554,900
+329,100
| +146% | +$12M |
|
544
CALL
Alcoa
AA
$12.2B
| $22.2M | 0.02% |
522,400
+131,800
| +34% | +$6.35M |
|
545
CALL
Li Auto
LI
$12B
| $22.2M | 0.02% |
890,400
-185,200
| -17% | -$4.37M |
|
546
PUT
Duke Energy
DUK
$99.7B
| $22.2M | 0.02% |
229,800
-40,600
| -15% | -$4.01M |
|
|
547
PUT
Antero Resources
AR
$10.9B
| $22.1M | 0.02% |
957,100
+215,100
| +29% | +$5.67M |
|
|
FITB
548
PUT
Fifth Third Bancorp
FITB
$52.3B
| $22.1M | 0.02% |
829,300
+738,100
| +809% | +$24.5M |
|
549
PUT
Norfolk Southern
NSC
$74.3B
| $22.1M | 0.02% |
104,100
+92,500
| +797% | +$21.4M |
|
550
CALL
Skyworks Solutions
SWKS
$9.5B
| $22.1M | 0.02% |
186,900
-29,000
| -13% | -$3.21M |
|
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.