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 | |
|---|---|---|---|---|---|---|
4051
CALL
Griffon
GFF
$4.13B
| $249K | ﹤0.01% |
6,200
-1,400
| -18% | -$45.9K |
|
4052
PUT
Vanguard FTSE Developed Markets ETF
VEA
$224B
| $249K | ﹤0.01% |
5,400
+4,500
| +500% | +$207K |
|
4053
PUT
Yext
YEXT
$568M
| $249K | ﹤0.01% |
22,100
+10,100
| +84% | +$96K |
|
|
ENLC
4054
PUT
DELISTED
ENLINK MIDSTREAM, LLC
ENLC
| $249K | ﹤0.01% |
23,500
-1,400
| -6% | -$14K |
|
4055
CALL
Bakkt Inc
BKKT
$324M
| $248K | ﹤0.01% |
8,088
-72
| -0.9% | -$2.52K |
|
4056
PUT
Halozyme
HALO
$9.93B
| $248K | ﹤0.01% |
6,900
+2,400
| +53% | +$81.9K |
|
4057
PUT
Murphy USA
MUSA
$11.6B
| $248K | ﹤0.01% |
800
-3,600
| -82% | -$1.01M |
|
|
PPSI
4058
PUT
Pioneer Power Solutions
PPSI
$32.3M
| $248K | ﹤0.01% |
+29,600
| New | +$177K |
|
|
ETWO
4059
CALL
DELISTED
E2open Parent Holdings
ETWO
| $247K | ﹤0.01% |
44,200
+38,400
| +662% | +$206K |
|
4060
M&T Bank
MTB
$36.4B
| $247K | ﹤0.01% |
2,000
| – | – |
|
4061
CALL
Hycroft Mining Holding Corp
HYMC
$1.79B
| $246K | ﹤0.01% |
83,340
-12,250
| -13% | -$46.4K |
|
|
MASI
4062
CALL
DELISTED
Masimo
MASI
| $246K | ﹤0.01% |
1,500
-5,200
| -78% | -$905K |
|
4063
CALL
Ocular Therapeutix
OCUL
$1.84B
| $246K | ﹤0.01% |
47,800
+31,300
| +190% | +$186K |
|
4064
CALL
LSB Industries
LXU
$830M
| $245K | ﹤0.01% |
24,900
-9,100
| -27% | -$87.1K |
|
|
HA
4065
CALL
DELISTED
Hawaiian Holdings, Inc.
HA
| $245K | ﹤0.01% |
22,800
-12,600
| -36% | -$109K |
|
4066
CALL
Vanguard Total International Bond ETF
BNDX
$82.1B
| $244K | ﹤0.01% |
5,000
| – | – |
|
4067
PUT
United States Gasoline Fund
UGA
$145M
| $244K | ﹤0.01% |
3,900
-200
| -5% | -$12K |
|
4068
PUT
BWX Technologies
BWXT
$15B
| $243K | ﹤0.01% |
3,400
-1,900
| -36% | -$124K |
|
4069
CALL
BlueLinx
BXC
$435M
| $243K | ﹤0.01% |
2,600
+1,400
| +117% | +$112K |
|
4070
PUT
Casey's General Stores
CASY
$32.3B
| $243K | ﹤0.01% |
1,000
| – | – |
|
4071
PUT
Gogo Inc
GOGO
$530M
| $243K | ﹤0.01% |
14,300
-90,900
| -86% | -$1.34M |
|
4072
HDFC Bank
HDB
$122B
| $243K | ﹤0.01% |
6,976
+3,214
| +85% | +$108K |
|
4073
CALL
nCino
NCNO
$2.06B
| $243K | ﹤0.01% |
8,100
-38,300
| -83% | -$975K |
|
4074
RCI Hospitality Holdings
RICK
$199M
| $243K | ﹤0.01% |
3,202
+824
| +35% | +$61.9K |
|
4075
CALL
American Superconductor
AMSC
$1.36B
| $242K | ﹤0.01% |
38,700
-3,700
| -9% | -$18K |
|
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.