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 | |
|---|---|---|---|---|---|---|
|
NVO
601
PUT
Novo Nordisk
NVO
$213B
| $19.4M | 0.02% |
243,400
+139,200
| +134% | +$9.87M |
|
602
PUT
State Street SPDR Portfolio Europe ETF
SPEU
$718M
| $19.3M | 0.02% |
429,100
-209,900
| -33% | -$7.83M |
|
603
PUT
Zillow
Z
$7.18B
| $19.2M | 0.02% |
433,800
+79,600
| +22% | +$3.38M |
|
604
PUT
Li Auto
LI
$12B
| $19.2M | 0.02% |
768,500
+230,800
| +43% | +$5.45M |
|
605
CALL
AutoZone
AZO
$48.5B
| $19.2M | 0.02% |
7,800
+4,900
| +169% | +$12M |
|
606
PUT
Seagate
STX
$205B
| $19.1M | 0.02% |
289,400
+42,300
| +17% | +$2.69M |
|
607
CALL
Petrobras
PBR
$122B
| $19.1M | 0.02% |
1,834,200
-1,004,200
| -35% | -$10.9M |
|
608
Oracle
ORCL
$362B
| $19.1M | 0.02% |
205,826
-50,105
| -20% | -$4.39M |
|
609
PUT
Charter Communications
CHTR
$15.9B
| $19.1M | 0.02% |
53,300
-250,800
| -82% | -$93.7M |
|
|
PARA
610
CALL
DELISTED
Paramount Global Class B
PARA
| $19M | 0.02% |
853,800
+14,000
| +2% | +$300K |
|
611
Zoom
ZM
$25.2B
| $19M | 0.02% |
257,562
+83,135
| +48% | +$5.99M |
|
612
PUT
Zoetis
ZTS
$31.1B
| $18.9M | 0.02% |
113,400
+70,100
| +162% | +$11.5M |
|
613
PUT
NXP Semiconductors
NXPI
$70.4B
| $18.9M | 0.02% |
101,200
-63,000
| -38% | -$11.2M |
|
|
614
CALL
Seagate
STX
$205B
| $18.8M | 0.02% |
284,300
-6,000
| -2% | -$382K |
|
615
CALL
Tyson Foods
TSN
$20.1B
| $18.7M | 0.02% |
314,800
+77,600
| +33% | +$4.76M |
|
616
PUT
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
$156M
| $18.7M | 0.02% |
103,850
+55,975
| +117% | +$10.8M |
|
617
State Street Technology Select Sector SPDR ETF
XLK
$117B
| $18.6M | 0.02% |
246,614
+239,614
| +3,423% | +$16.5M |
|
618
PUT
Global Payments
GPN
$21.6B
| $18.6M | 0.02% |
176,700
+63,800
| +57% | +$6.91M |
|
619
CALL
Futu Holdings
FUTU
$14.9B
| $18.5M | 0.02% |
357,700
-14,800
| -4% | -$719K |
|
620
PUT
Macy's
M
$6.4B
| $18.4M | 0.02% |
1,053,800
-553,200
| -34% | -$11.7M |
|
|
MRO
621
CALL
DELISTED
Marathon Oil Corporation
MRO
| $18.4M | 0.02% |
768,200
-145,400
| -16% | -$3.72M |
|
622
CALL
Oneok
OKE
$57.8B
| $18.4M | 0.02% |
289,200
+27,100
| +10% | +$1.8M |
|
623
PUT
Wayfair
W
$11.1B
| $18.4M | 0.02% |
534,500
+115,700
| +28% | +$5.12M |
|
624
PUT
On Holding
ONON
$12.2B
| $18.3M | 0.02% |
588,600
+546,200
| +1,288% | +$12.4M |
|
625
PUT
Tractor Supply
TSCO
$15.4B
| $18.2M | 0.02% |
387,500
+241,000
| +165% | +$11M |
|
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.