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 | |
|---|---|---|---|---|---|---|
626
CALL
C.H. Robinson
CHRW
$17.3B
| $18.2M | 0.02% |
183,300
+32,200
| +21% | +$3.17M |
|
627
PUT
Gilead Sciences
GILD
$187B
| $18.2M | 0.02% |
219,200
-226,700
| -51% | -$18.8M |
|
628
PUT
Marathon Digital Holdings
MARA
$4.37B
| $18.1M | 0.02% |
2,071,400
+244,700
| +13% | +$1.71M |
|
|
FISV
629
CALL
Fiserv Inc
FISV
$28.2B
| $18.1M | 0.02% |
159,700
-42,900
| -21% | -$4.72M |
|
630
CALL
Best Buy
BBY
$19B
| $18M | 0.02% |
229,900
+14,600
| +7% | +$1.2M |
|
631
Union Pacific
UNP
$172B
| $18M | 0.02% |
+89,395
| New | +$18.1M |
|
632
PUT
ZIM Integrated Shipping Services
ZIM
$3.44B
| $18M | 0.02% |
762,700
+309,800
| +68% | +$6.51M |
|
633
PUT
iShares Convertible Bond ETF
ICVT
$7.89B
| $18M | 0.02% |
657,200
+142,200
| +28% | +$10.3M |
|
634
CALL
ChargePoint
CHPT
$267M
| $18M | 0.02% |
85,775
+32,080
| +60% | +$6.99M |
|
|
635
PUT
Best Buy
BBY
$19B
| $17.9M | 0.02% |
229,100
-185,800
| -45% | -$15.3M |
|
636
CALL
Exelon
EXC
$45B
| $17.9M | 0.02% |
441,900
+155,400
| +54% | +$6.48M |
|
637
PUT
CME Group
CME
$101B
| $17.9M | 0.02% |
93,300
-60,400
| -39% | -$10.9M |
|
638
CALL
Invesco Aerospace & Defense ETF
PPA
$7.91B
| $17.9M | 0.02% |
141,700
+88,700
| +167% | +$7.07M |
|
639
CALL
iShares Core MSCI Emerging Markets ETF
IEMG
$165B
| $17.8M | 0.02% |
318,700
-227,300
| -42% | -$11.2M |
|
640
CALL
Caesars Entertainment
CZR
$6.05B
| $17.7M | 0.02% |
362,700
-200,100
| -36% | -$9.81M |
|
641
Intel
INTC
$506B
| $17.6M | 0.02% |
539,870
+519,643
| +2,569% | +$14.7M |
|
642
PUT
Advance Auto Parts
AAP
$2.67B
| $17.5M | 0.02% |
144,000
+17,900
| +14% | +$2.5M |
|
643
Petrobras
PBR
$130B
| $17.5M | 0.02% |
1,676,726
+1,575,558
| +1,557% | +$17.1M |
|
644
PUT
APA Corp
APA
$15B
| $17.5M | 0.02% |
484,100
+31,300
| +7% | +$1.26M |
|
645
PUT
Halliburton
HAL
$30.9B
| $17.3M | 0.02% |
548,300
-278,300
| -34% | -$10.3M |
|
646
PUT
KLA
KLAC
$242B
| $17.3M | 0.02% |
434,000
-774,000
| -64% | -$30.5M |
|
|
AXON
647
PUT
Axon Enterprise
AXON
$41.9B
| $17.3M | 0.02% |
76,900
+52,100
| +210% | +$10.4M |
|
648
PUT
Cameco
CCJ
$43.9B
| $17.3M | 0.02% |
659,500
+308,100
| +88% | +$8.14M |
|
649
PUT
ProShares Ultra Bloomberg Natural Gas
BOIL
$417M
| $17.2M | 0.02% |
9,212
+2,462
| +36% | +$3.51M |
|
650
PUT
Boston Scientific
BSX
$69.3B
| $17.2M | 0.02% |
343,000
-14,000
| -4% | -$660K |
|
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.