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 |
Microsoft
MSFT
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
Starbucks
SBUX
|
+$26.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Healthcare | 0.21% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.2% |
| 5 | Financials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
FRC
3376
CALL
DELISTED
First Republic Bank
FRC
| $471K | ﹤0.01% |
857,200
-659,000
| -43% | -$8.05M |
|
3377
The RealReal
REAL
$1.4B
| $470K | ﹤0.01% |
212,156
+212,098
| +365,686% | +$290K |
|
3378
CALL
Kulicke & Soffa
KLIC
$5.14B
| $469K | ﹤0.01% |
7,900
-15,200
| -66% | -$784K |
|
|
NMTR
3379
CALL
DELISTED
9 Meters Biopharma
NMTR
| $469K | ﹤0.01% |
698,400
-1,100
| -0.2% | -$973 |
|
3380
CALL
BOK Financial
BOKF
$8.58B
| $468K | ﹤0.01% |
5,800
+800
| +16% | +$65.9K |
|
|
EFC
3381
CALL
Ellington Financial
EFC
$1.68B
| $467K | ﹤0.01% |
33,900
-1,900
| -5% | -$24.2K |
|
3382
PUT
LegalZoom.com
LZ
$1.3B
| $466K | ﹤0.01% |
38,600
+23,500
| +156% | +$249K |
|
3383
Invesco CurrencyShares Canadian Dollar Trust
FXC
$72.6M
| $465K | ﹤0.01% |
6,298
+4,168
| +196% | +$304K |
|
|
MTTR
3384
DELISTED
Matterport, Inc. Class A Common Stock
MTTR
| $465K | ﹤0.01% |
147,911
+94,000
| +174% | +$261K |
|
3385
CALL
Ring Energy
REI
$297M
| $464K | ﹤0.01% |
271,400
-31,500
| -10% | -$57.7K |
|
3386
PUT
InterDigital
IDCC
$6.7B
| $463K | ﹤0.01% |
4,800
+1,000
| +26% | +$81K |
|
3387
NovoCure
NVCR
$1.97B
| $463K | ﹤0.01% |
11,174
+11,074
| +11,074% | +$688K |
|
3388
PUT
PureCycle Technologies
PCT
$1.2B
| $463K | ﹤0.01% |
43,400
-275,400
| -86% | -$2M |
|
3389
PUT
Ternium
TX
$9.37B
| $463K | ﹤0.01% |
11,700
-3,600
| -24% | -$145K |
|
3390
PUT
Archer Aviation
ACHR
$3.78B
| $462K | ﹤0.01% |
112,200
+99,700
| +798% | +$281K |
|
3391
PUT
Brookdale Senior Living
BKD
$3.69B
| $462K | ﹤0.01% |
109,600
+39,100
| +55% | +$151K |
|
3392
Helmerich & Payne
HP
$3.36B
| $461K | ﹤0.01% |
13,013
-12,474
| -49% | -$425K |
|
3393
CALL
Snap-on
SNA
$21.1B
| $461K | ﹤0.01% |
1,600
+1,300
| +433% | +$337K |
|
3394
PUT
Allot
ALLT
$373M
| $460K | ﹤0.01% |
145,600
-109,900
| -43% | -$310K |
|
3395
CALL
BBVA Argentina
BBAR
$3.92B
| $460K | ﹤0.01% |
75,100
-7,800
| -9% | -$37.4K |
|
3396
Coherus Oncology
CHRS
$225M
| $460K | ﹤0.01% |
107,836
+94,561
| +712% | +$558K |
|
|
MASI
3397
PUT
DELISTED
Masimo
MASI
| $460K | ﹤0.01% |
2,800
+1,800
| +180% | +$313K |
|
3398
Newell Brands
NWL
$2.2B
| $460K | ﹤0.01% |
52,982
+44,735
| +542% | +$445K |
|
3399
RBC Bearings
RBC
$18.5B
| $460K | ﹤0.01% |
+2,118
| New | +$459K |
|
|
CPRX
3400
CALL
DELISTED
Catalyst Pharmaceutical
CPRX
| $459K | ﹤0.01% |
34,200
-138,100
| -80% | -$1.99M |
|
Similar funds
Simplex Trading's Q2 2023 Portfolio in Review
As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
- Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
- Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
- Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
- Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
- Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.
Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.