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 | |
|---|---|---|---|---|---|---|
|
HUYA
4476
PUT
Huya Inc
HUYA
$558M
| $171K | ﹤0.01% |
47,900
-8,600
| -15% | -$28.3K |
|
4477
Kimbell Royalty Partners
KRP
$1.46B
| $171K | ﹤0.01% |
+11,634
| New | +$180K |
|
|
RNAM
4478
CALL
DELISTED
Avidity Biosciences
RNAM
| $171K | ﹤0.01% |
15,500
-600
| -4% | -$7.53K |
|
4479
Altimmune
ALT
$568M
| $170K | ﹤0.01% |
+48,336
| New | +$217K |
|
4480
PUT
Atomera
ATOM
$173M
| $170K | ﹤0.01% |
19,400
+14,700
| +313% | +$116K |
|
4481
PUT
Immunic
IMUX
$178M
| $170K | ﹤0.01% |
6,790
-2,730
| -29% | -$45.8K |
|
4482
CALL
Prothena Corp
PRTA
$448M
| $170K | ﹤0.01% |
2,500
-30,100
| -92% | -$1.94M |
|
4483
PUT
Ultragenyx Pharmaceutical
RARE
$2.46B
| $170K | ﹤0.01% |
3,700
+500
| +16% | +$23.2K |
|
4484
CALL
abrdn Physical Silver Shares ETF
SIVR
$3.98B
| $170K | ﹤0.01% |
7,800
-6,200
| -44% | -$144K |
|
4485
CALL
Smith & Nephew
SNN
$13.7B
| $170K | ﹤0.01% |
5,300
-16,600
| -76% | -$514K |
|
4486
PUT
Beazer Homes USA
BZH
$888M
| $169K | ﹤0.01% |
6,000
+2,500
| +71% | +$51K |
|
4487
CALL
Capricor Therapeutics
CAPR
$380M
| $169K | ﹤0.01% |
35,500
-38,200
| -52% | -$168K |
|
|
DCBO
4488
CALL
Docebo
DCBO
$559M
| $169K | ﹤0.01% |
4,300
| – | – |
|
4489
CALL
Enova International
ENVA
$6.09B
| $169K | ﹤0.01% |
3,200
+1,400
| +78% | +$66K |
|
|
HEES
4490
CALL
DELISTED
H&E Equipment Services
HEES
| $169K | ﹤0.01% |
3,700
-19,600
| -84% | -$783K |
|
4491
PUT
Healthcare Realty
HR
$7.56B
| $169K | ﹤0.01% |
9,000
+2,400
| +36% | +$46.3K |
|
4492
Ingredion
INGR
$6.42B
| $169K | ﹤0.01% |
+1,601
| New | +$170K |
|
|
MITT
4493
TPG Mortgage Investment Trust
MITT
$228M
| $169K | ﹤0.01% |
27,624
+1,774
| +7% | +$10.1K |
|
4494
PUT
NextDecade
NEXT
$1.68B
| $169K | ﹤0.01% |
20,700
+9,600
| +86% | +$58.9K |
|
4495
Qfin Holdings
QFIN
$1.68B
| $169K | ﹤0.01% |
9,822
-65,946
| -87% | -$1.11M |
|
4496
CALL
Sun Communities
SUI
$15.8B
| $169K | ﹤0.01% |
1,300
-25,100
| -95% | -$3.36M |
|
4497
CALL
Trinity Capital Inc.
TRIN
$1.58B
| $169K | ﹤0.01% |
12,800
+7,300
| +133% | +$91.4K |
|
4498
CALL
Arvinas
ARVN
$530M
| $168K | ﹤0.01% |
6,800
-20,300
| -75% | -$522K |
|
4499
Credicorp
BAP
$30.5B
| $168K | ﹤0.01% |
1,144
+44
| +4% | +$6.04K |
|
4500
PUT
Embecta
EMBC
$218M
| $168K | ﹤0.01% |
7,800
| – | – |
|
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.