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 | |
|---|---|---|---|---|---|---|
5501
C.H. Robinson
CHRW
$17.5B
| $68K | ﹤0.01% |
+730
| New | +$70.6K |
|
5502
Fox Class B
FOX
$21.9B
| $68K | ﹤0.01% |
+2,148
| New | +$65.1K |
|
5503
CALL
First Trust Value Line Dividend Fund
FVD
$8.32B
| $68K | ﹤0.01% |
+1,700
| New | +$68K |
|
5504
CALL
Hawaiian Electric Industries
HE
$2.24B
| $68K | ﹤0.01% |
1,900
-600
| -24% | -$22.6K |
|
5505
The Honest Company
HNST
$403M
| $68K | ﹤0.01% |
40,714
+1,385
| +4% | +$2.36K |
|
5506
PUT
Hexcel
HXL
$7.84B
| $68K | ﹤0.01% |
900
-400
| -31% | -$28.5K |
|
5507
CALL
Inovio Pharmaceuticals
INO
$54.7M
| $68K | ﹤0.01% |
12,867
+84
| +0.7% | +$677 |
|
5508
PUT
International Seaways
INSW
$4.76B
| $68K | ﹤0.01% |
1,800
+600
| +50% | +$23K |
|
5509
PUT
Offerpad Solutions
OPAD
$18.2M
| $68K | ﹤0.01% |
530
+417
| +369% | +$35K |
|
|
PCH
5510
CALL
DELISTED
PotlatchDeltic
PCH
| $68K | ﹤0.01% |
1,300
-600
| -32% | -$28.9K |
|
|
HTT
5511
CALL
High Templar Tech Ltd
HTT
$374M
| $68K | ﹤0.01% |
34,400
+3,100
| +10% | +$4.48K |
|
5512
CALL
John Wiley & Sons Class A
WLY
$2.65B
| $68K | ﹤0.01% |
2,000
+1,900
| +1,900% | +$69.2K |
|
|
EXAI
5513
CALL
DELISTED
Exscientia Plc American Depositary Shares
EXAI
| $68K | ﹤0.01% |
11,600
+2,400
| +26% | +$14.7K |
|
5514
Adaptive Biotechnologies
ADPT
$3.65B
| $67K | ﹤0.01% |
10,075
+6,597
| +190% | +$49.1K |
|
5515
Ardagh Metal Packaging
AMBP
$2.82B
| $67K | ﹤0.01% |
18,019
-19,331
| -52% | -$71.4K |
|
|
DVAX
5516
PUT
DELISTED
Dynavax Technologies
DVAX
| $67K | ﹤0.01% |
5,200
-1,000
| -16% | -$11.4K |
|
|
NXDR
5517
PUT
Nextdoor Holdings
NXDR
$847M
| $67K | ﹤0.01% |
20,600
-4,700
| -19% | -$11.7K |
|
5518
CALL
Kimbell Royalty Partners
KRP
$1.47B
| $67K | ﹤0.01% |
4,600
-136,100
| -97% | -$2.1M |
|
5519
PUT
MiMedx Group
MDXG
$599M
| $67K | ﹤0.01% |
10,200
+2,500
| +32% | +$12.7K |
|
5520
National Grid
NGG
$80.6B
| $67K | ﹤0.01% |
+1,060
| New | +$69.5K |
|
|
RPC
5521
PUT
Ridgepost Capital
RPC
$939M
| $67K | ﹤0.01% |
6,000
| – | – |
|
5522
Interface
TILE
$1.98B
| $67K | ﹤0.01% |
7,672
-2,915
| -28% | -$22.4K |
|
5523
Vertex
VERX
$2.07B
| $67K | ﹤0.01% |
3,440
-11,642
| -77% | -$246K |
|
5524
CALL
XPEL
XPEL
$1.22B
| $67K | ﹤0.01% |
800
-1,400
| -64% | -$103K |
|
|
EGLE
5525
CALL
DELISTED
Eagle Bulk Shipping Inc.
EGLE
| $67K | ﹤0.01% |
1,400
-7,700
| -85% | -$340K |
|
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.