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 | |
|---|---|---|---|---|---|---|
|
DOCU
326
CALL
DocuSign
DOCU
$9.14B
| $41.6M | 0.04% |
714,000
-187,200
| -21% | -$11.2M |
|
327
PUT
Novartis
NVS
$292B
| $41.3M | 0.04% |
449,100
-6,600
| -1% | -$576K |
|
328
CALL
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$254M
| $41M | 0.04% |
4,780,000
-1,109,200
| -19% | -$37.9M |
|
329
CALL
United Airlines
UAL
$38.1B
| $40.9M | 0.04% |
924,900
-421,900
| -31% | -$20.2M |
|
330
PUT
GE Aerospace
GE
$354B
| $40.8M | 0.04% |
783,125
-823,252
| -51% | -$55.1M |
|
331
PUT
Snap
SNAP
$7.52B
| $40.8M | 0.04% |
3,635,800
+760,600
| +26% | +$7.99M |
|
332
PUT
Danaher
DHR
$127B
| $40.6M | 0.04% |
181,608
+43,766
| +32% | +$9.96M |
|
333
CALL
SLB Ltd
SLB
$71.3B
| $40.4M | 0.04% |
821,900
-84,800
| -9% | -$4.5M |
|
334
CALL
Workday
WDAY
$32.7B
| $40.2M | 0.04% |
194,700
-131,400
| -40% | -$23.9M |
|
335
PUT
Etsy
ETSY
$7.64B
| $40M | 0.04% |
359,300
-306,400
| -46% | -$38M |
|
336
CALL
Simon Property Group
SPG
$73.4B
| $40M | 0.04% |
356,900
+126,100
| +55% | +$15.1M |
|
337
PUT
Accenture
ACN
$85.7B
| $39.9M | 0.04% |
139,500
-7,400
| -5% | -$2.02M |
|
338
CALL
Rivian
RIVN
$24.9B
| $39.3M | 0.03% |
2,541,500
+95,800
| +4% | +$1.62M |
|
339
PUT
AMC Entertainment Holdings
AMC
$2.01B
| $39.2M | 0.03% |
768,650
+424,650
| +123% | +$22.5M |
|
340
CALL
Dow Inc
DOW
$22.5B
| $39.1M | 0.03% |
713,800
+91,700
| +15% | +$5.16M |
|
341
CALL
Charter Communications
CHTR
$15.9B
| $38.9M | 0.03% |
108,900
-92,500
| -46% | -$34.6M |
|
342
CALL
Las Vegas Sands
LVS
$30B
| $38.8M | 0.03% |
675,800
-229,300
| -25% | -$12.8M |
|
343
PUT
United Rentals
URI
$64.8B
| $38.5M | 0.03% |
97,300
+11,100
| +13% | +$4.66M |
|
344
CALL
Medtronic
MDT
$105B
| $38.5M | 0.03% |
477,200
+89,400
| +23% | +$7.29M |
|
345
PUT
Biogen
BIIB
$29.2B
| $38.3M | 0.03% |
137,600
-44,100
| -24% | -$12.2M |
|
346
PUT
Okta
OKTA
$23.8B
| $38.3M | 0.03% |
443,600
+219,700
| +98% | +$16.7M |
|
347
CALL
PNC Financial Services
PNC
$101B
| $38.2M | 0.03% |
300,900
+98,900
| +49% | +$14.9M |
|
|
X
348
PUT
DELISTED
US Steel
X
| $38.2M | 0.03% |
1,465,200
+367,100
| +33% | +$10.2M |
|
349
PUT
MGM Resorts International
MGM
$11.6B
| $38.1M | 0.03% |
856,700
-40,100
| -4% | -$1.67M |
|
|
350
CALL
Okta
OKTA
$23.8B
| $38M | 0.03% |
440,500
+24,800
| +6% | +$1.89M |
|
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.