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 | |
|---|---|---|---|---|---|---|
1676
CALL
T. Rowe Price
TROW
$25B
| $2.92M | ﹤0.01% |
26,100
-29,700
| -53% | -$3.25M |
|
1677
CALL
Weatherford International
WFRD
$6.36B
| $2.92M | ﹤0.01% |
44,000
+8,600
| +24% | +$530K |
|
1678
CALL
Darling Ingredients
DAR
$9.93B
| $2.92M | ﹤0.01% |
45,800
+23,500
| +105% | +$1.43M |
|
|
CPE
1679
PUT
DELISTED
Callon Petroleum Company
CPE
| $2.92M | ﹤0.01% |
83,300
+22,800
| +38% | +$763K |
|
|
K
1680
PUT
DELISTED
Kellanova
K
| $2.92M | ﹤0.01% |
46,115
-15,655
| -25% | -$998K |
|
1681
CALL
Kinross Gold
KGC
$28.5B
| $2.92M | ﹤0.01% |
611,200
+75,700
| +14% | +$378K |
|
1682
Li Auto
LI
$12.6B
| $2.91M | ﹤0.01% |
+82,963
| New | +$2.33M |
|
1683
PUT
Ollie's Bargain Outlet
OLLI
$4.01B
| $2.91M | ﹤0.01% |
50,200
+6,200
| +14% | +$382K |
|
1684
CALL
Applovin
APP
$132B
| $2.9M | ﹤0.01% |
112,800
-202,800
| -64% | -$4.19M |
|
1685
CALL
Tronox
TROX
$995M
| $2.9M | ﹤0.01% |
228,100
+152,600
| +202% | +$1.92M |
|
1686
CALL
BorgWarner
BWA
$13.2B
| $2.9M | ﹤0.01% |
67,251
+43,054
| +178% | +$1.77M |
|
1687
Campbell Soup
CPB
$6.51B
| $2.9M | ﹤0.01% |
63,336
+23,482
| +59% | +$1.21M |
|
1688
PUT
ScottsMiracle-Gro
SMG
$4.03B
| $2.88M | ﹤0.01% |
46,000
-47,100
| -51% | -$3.16M |
|
1689
CALL
Interactive Brokers
IBKR
$40.9B
| $2.88M | ﹤0.01% |
138,800
-17,600
| -11% | -$347K |
|
1690
CALL
SoundHound AI
SOUN
$2.68B
| $2.88M | ﹤0.01% |
632,800
+130,600
| +26% | +$388K |
|
1691
Aramark
ARMK
$15B
| $2.87M | ﹤0.01% |
92,366
+28,419
| +44% | +$774K |
|
|
WRK
1692
CALL
DELISTED
WestRock Company
WRK
| $2.87M | ﹤0.01% |
98,700
+77,300
| +361% | +$2.24M |
|
1693
CALL
Clarivate
CLVT
$1.3B
| $2.85M | ﹤0.01% |
299,400
-315,200
| -51% | -$2.67M |
|
1694
PUT
3D Systems Corp
DDD
$420M
| $2.85M | ﹤0.01% |
287,400
+180,600
| +169% | +$1.65M |
|
1695
CALL
Telefônica Brasil
VIV
$22.4B
| $2.85M | ﹤0.01% |
312,200
+104,300
| +50% | +$873K |
|
1696
CALL
iQIYI
IQ
$1.18B
| $2.84M | ﹤0.01% |
532,400
-56,700
| -10% | -$319K |
|
1697
PUT
Wheaton Precious Metals
WPM
$50.6B
| $2.84M | ﹤0.01% |
65,700
-1,200
| -2% | -$57K |
|
|
BECN
1698
DELISTED
Beacon Roofing Supply, Inc.
BECN
| $2.84M | ﹤0.01% |
+34,209
| New | +$2.26M |
|
1699
CALL
F5
FFIV
$22.1B
| $2.84M | ﹤0.01% |
19,400
+7,800
| +67% | +$1.11M |
|
1700
CALL
RenaissanceRe
RNR
$13.7B
| $2.83M | ﹤0.01% |
15,200
+3,100
| +26% | +$617K |
|
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.