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 | |
|---|---|---|---|---|---|---|
|
BWIN
4001
CALL
Baldwin Insurance Group
BWIN
$2.79B
| $260K | ﹤0.01% |
+10,500
| New | +$249K |
|
4002
CALL
Ametek
AME
$55.3B
| $259K | ﹤0.01% |
1,600
+600
| +60% | +$87.6K |
|
4003
United States Copper Index Fund
CPER
$742M
| $259K | ﹤0.01% |
11,165
+530
| +5% | +$12.5K |
|
|
DEA
4004
CALL
Easterly Government Properties
DEA
$1.17B
| $259K | ﹤0.01% |
7,160
-9,960
| -58% | -$350K |
|
4005
PUT
Fulton Financial
FULT
$4.73B
| $259K | ﹤0.01% |
21,800
+19,200
| +738% | +$231K |
|
4006
Marvell Technology
MRVL
$157B
| $259K | ﹤0.01% |
4,335
-215,366
| -98% | -$10.5M |
|
4007
PUT
Navitas Semiconductor
NVTS
$2.61B
| $259K | ﹤0.01% |
24,600
+16,600
| +208% | +$129K |
|
|
PBT
4008
PUT
Permian Basin Royalty Trust
PBT
$1.31B
| $259K | ﹤0.01% |
10,400
-54,600
| -84% | -$1.35M |
|
4009
CALL
Rogers Corp
ROG
$2.13B
| $259K | ﹤0.01% |
1,600
-10,200
| -86% | -$1.62M |
|
4010
CALL
Zevra Therapeutics
ZVRA
$575M
| $259K | ﹤0.01% |
50,900
-41,400
| -45% | -$223K |
|
4011
CALL
Akebia Therapeutics
AKBA
$341M
| $258K | ﹤0.01% |
282,600
-41,900
| -13% | -$40.4K |
|
4012
Diamondback Energy
FANG
$53.5B
| $258K | ﹤0.01% |
1,970
-85,903
| -98% | -$11.5M |
|
4013
Fomento Económico Mexicano
FMX
$43.5B
| $258K | ﹤0.01% |
+2,328
| New | +$234K |
|
|
HAPN
4014
CALL
Happen Inc
HAPN
$2.19B
| $258K | ﹤0.01% |
26,500
+100
| +0.4% | +$803 |
|
4015
PUT
TORM
TRMD
$3.05B
| $258K | ﹤0.01% |
10,700
-9,200
| -46% | -$256K |
|
|
WSR
4016
CALL
DELISTED
Whitestone REIT
WSR
| $258K | ﹤0.01% |
26,600
+3,300
| +14% | +$29.7K |
|
4017
American Vanguard Corp
AVD
$74.1M
| $257K | ﹤0.01% |
14,437
+5,048
| +54% | +$93.3K |
|
4018
Euronet Worldwide
EEFT
$3.15B
| $257K | ﹤0.01% |
+2,193
| New | +$245K |
|
4019
CALL
Planet Labs
PL
$7.28B
| $257K | ﹤0.01% |
80,000
-6,400
| -7% | -$25.4K |
|
4020
Tower Semiconductor
TSEM
$22.9B
| $257K | ﹤0.01% |
6,858
+3,713
| +118% | +$154K |
|
4021
CALL
Vanguard Total International Stock ETF
VXUS
$153B
| $257K | ﹤0.01% |
4,600
-500
| -10% | -$28K |
|
|
AMED
4022
CALL
DELISTED
Amedisys
AMED
| $256K | ﹤0.01% |
2,800
+1,100
| +65% | +$90.2K |
|
4023
Amplify Blockchain Technology ETF
BLOK
$1.08B
| $256K | ﹤0.01% |
+11,262
| New | +$226K |
|
4024
Tecnoglass
TGLS
$2.09B
| $256K | ﹤0.01% |
4,973
+1,532
| +45% | +$68.1K |
|
4025
PUT
Petco
WOOF
$811M
| $256K | ﹤0.01% |
28,800
-1,600
| -5% | -$14.7K |
|
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.