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 | |
|---|---|---|---|---|---|---|
4526
PUT
Amprius Technologies
AMPX
$1.2B
| $164K | ﹤0.01% |
22,900
+4,100
| +22% | +$35.2K |
|
4527
Global X Autonomous & Electric Vehicles ETF
DRIV
$361M
| $164K | ﹤0.01% |
6,318
+5,540
| +712% | +$131K |
|
4528
PUT
Euronet Worldwide
EEFT
$3.19B
| $164K | ﹤0.01% |
1,400
+1,300
| +1,300% | +$145K |
|
4529
Progress Software
PRGS
$1.75B
| $164K | ﹤0.01% |
+2,835
| New | +$161K |
|
|
SFIX
4530
CALL
Stitch Fix
SFIX
$567M
| $164K | ﹤0.01% |
42,600
-9,100
| -18% | -$34.5K |
|
4531
CALL
Wyndham Hotels & Resorts
WH
$5.61B
| $164K | ﹤0.01% |
2,400
-14,400
| -86% | -$983K |
|
|
PWSC
4532
CALL
DELISTED
PowerSchool Holdings, Inc.
PWSC
| $164K | ﹤0.01% |
8,600
+5,100
| +146% | +$97.5K |
|
4533
CALL
Patterson-UTI
PTEN
$3.54B
| $163K | ﹤0.01% |
13,700
-14,500
| -51% | -$164K |
|
4534
CALL
Vuzix
VUZI
$178M
| $163K | ﹤0.01% |
32,000
+21,300
| +199% | +$94.3K |
|
4535
CALL
CoreCivic
CXW
$2.94B
| $162K | ﹤0.01% |
17,300
-13,900
| -45% | -$126K |
|
4536
PUT
Krispy Kreme
DNUT
$562M
| $162K | ﹤0.01% |
11,000
+4,200
| +62% | +$62.9K |
|
4537
CALL
Highwoods Properties
HIW
$3.79B
| $162K | ﹤0.01% |
6,800
-4,000
| -37% | -$88.5K |
|
4538
State Street SPDR S&P Bank ETF
KBE
$1.64B
| $162K | ﹤0.01% |
4,511
-11,220
| -71% | -$400K |
|
4539
PUT
MKS Inc
MKSI
$17.4B
| $162K | ﹤0.01% |
1,500
-2,600
| -63% | -$238K |
|
4540
Sociedad Química y Minera de Chile
SQM
$19.3B
| $162K | ﹤0.01% |
2,234
+1,580
| +242% | +$112K |
|
4541
USA Compression Partners
USAC
$3.69B
| $162K | ﹤0.01% |
8,217
-24,668
| -75% | -$495K |
|
|
QVCGA
4542
DELISTED
QVC Group Inc Series A
QVCGA
| $162K | ﹤0.01% |
3,288
+2,666
| +429% | +$120K |
|
4543
PUT
Andersons Inc
ANDE
$2.39B
| $161K | ﹤0.01% |
3,500
+1,800
| +106% | +$75.3K |
|
4544
Banco de Chile
BCH
$20.6B
| $161K | ﹤0.01% |
7,729
+7,466
| +2,839% | +$156K |
|
4545
CALL
Americold
COLD
$4.21B
| $161K | ﹤0.01% |
5,000
-10,900
| -69% | -$325K |
|
4546
Crane NXT
CXT
$2.99B
| $161K | ﹤0.01% |
2,869
+2,017
| +237% | +$103K |
|
4547
GoodRx Holdings
GDRX
$1.09B
| $161K | ﹤0.01% |
29,240
+27,962
| +2,188% | +$150K |
|
4548
CALL
HighPeak Energy
HPK
$838M
| $161K | ﹤0.01% |
14,800
| – | – |
|
4549
PUT
Thomson Reuters
TRI
$46.4B
| $161K | ﹤0.01% |
1,181
-3,469
| -75% | -$465K |
|
4550
Televisa
TV
$1.49B
| $161K | ﹤0.01% |
+31,421
| New | +$158K |
|
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.