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 | |
|---|---|---|---|---|---|---|
|
CTEV
4551
Claritev Corp
CTEV
$399M
| $161K | ﹤0.01% |
+1,914
| New | +$102K |
|
4552
PUT
Amkor Technology
AMKR
$10.6B
| $160K | ﹤0.01% |
5,400
-42,200
| -89% | -$1.03M |
|
|
CCRN
4553
CALL
DELISTED
Cross Country Healthcare
CCRN
| $160K | ﹤0.01% |
5,700
+3,100
| +119% | +$77K |
|
|
DADA
4554
CALL
DELISTED
Dada Nexus
DADA
| $160K | ﹤0.01% |
30,300
-400
| -1% | -$2.42K |
|
|
EFC
4555
PUT
Ellington Financial
EFC
$1.69B
| $160K | ﹤0.01% |
11,600
+3,700
| +47% | +$47.1K |
|
4556
PUT
Eve Holding
EVEX
$777M
| $160K | ﹤0.01% |
15,300
-11,800
| -44% | -$98.1K |
|
4557
PUT
Mirum Pharmaceuticals
MIRM
$6.56B
| $160K | ﹤0.01% |
+6,200
| New | +$165K |
|
|
OTLY
4558
CALL
Oatly Group
OTLY
$476M
| $160K | ﹤0.01% |
3,920
-1,415
| -27% | -$57.8K |
|
4559
CALL
Steven Madden
SHOO
$3.17B
| $160K | ﹤0.01% |
4,900
+2,400
| +96% | +$80K |
|
4560
CALL
ARS Pharmaceuticals
SPRY
$579M
| $160K | ﹤0.01% |
24,000
-122,300
| -84% | -$816K |
|
4561
PUT
Talos Energy
TALO
$2.38B
| $160K | ﹤0.01% |
11,600
+7,100
| +158% | +$95.6K |
|
4562
PUT
United Bankshares
UBSI
$6.69B
| $160K | ﹤0.01% |
5,400
-1,700
| -24% | -$53.5K |
|
4563
ProShares Ultra Semiconductors
USD
$2.13B
| $160K | ﹤0.01% |
15,156
-2,876
| -16% | -$23K |
|
4564
CALL
Zevia
ZVIA
$118M
| $160K | ﹤0.01% |
37,300
+36,800
| +7,360% | +$142K |
|
4565
Digital Turbine
APPS
$982M
| $159K | ﹤0.01% |
17,224
-3,998
| -19% | -$44K |
|
4566
Altisource Portfolio Solutions
ASPS
$57.6M
| $159K | ﹤0.01% |
3,489
-132
| -4% | -$4.9K |
|
4567
CALL
Banco Bilbao Vizcaya Argentaria
BBVA
$142B
| $159K | ﹤0.01% |
20,800
-25,900
| -55% | -$185K |
|
4568
CALL
Kontoor Brands
KTB
$4.71B
| $159K | ﹤0.01% |
3,800
-1,000
| -21% | -$42.9K |
|
|
ACH
4569
CALL
Accendra Health
ACH
$254M
| $159K | ﹤0.01% |
8,400
+2,500
| +42% | +$44.6K |
|
4570
CALL
Compañía de Minas Buenaventura
BVN
$7.68B
| $158K | ﹤0.01% |
21,500
+18,700
| +668% | +$138K |
|
4571
Forum Energy Technologies
FET
$578M
| $158K | ﹤0.01% |
+6,213
| New | +$147K |
|
4572
PUT
Graphic Packaging
GPK
$3.35B
| $158K | ﹤0.01% |
6,600
-2,200
| -25% | -$55.2K |
|
4573
Hudbay
HBM
$9.76B
| $158K | ﹤0.01% |
33,052
+5,910
| +22% | +$28.9K |
|
4574
Lufax Holding
LU
$1.33B
| $158K | ﹤0.01% |
+27,753
| New | +$183K |
|
4575
PUT
Utz Brands
UTZ
$1.24B
| $158K | ﹤0.01% |
9,700
| – | – |
|
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.