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 | |
|---|---|---|---|---|---|---|
4876
PUT
Energizer
ENR
$1.47B
| $117K | ﹤0.01% |
3,500
+1,200
| +52% | +$40.1K |
|
4877
CALL
Immunovant
IMVT
$7.93B
| $117K | ﹤0.01% |
6,200
-3,900
| -39% | -$72.7K |
|
4878
Pilgrim's Pride
PPC
$7.13B
| $117K | ﹤0.01% |
5,486
+1,507
| +38% | +$33.9K |
|
4879
PUT
PTC Therapeutics
PTCT
$6.18B
| $117K | ﹤0.01% |
2,900
-26,000
| -90% | -$1.27M |
|
4880
PUT
Regency Centers
REG
$14.9B
| $117K | ﹤0.01% |
1,900
+700
| +58% | +$41.7K |
|
4881
Rekor Systems
REKR
$82.6M
| $117K | ﹤0.01% |
+66,195
| New | +$92.2K |
|
4882
CALL
TaskUs
TASK
$594M
| $117K | ﹤0.01% |
10,400
-14,500
| -58% | -$176K |
|
4883
CALL
United Parks & Resorts
PRKS
$2.19B
| $117K | ﹤0.01% |
2,100
-3,900
| -65% | -$220K |
|
|
AHT
4884
PUT
Ashford Hospitality Trust
AHT
$20.8M
| $116K | ﹤0.01% |
3,110
+2,510
| +418% | +$94.3K |
|
4885
PUT
Ardagh Metal Packaging
AMBP
$2.96B
| $116K | ﹤0.01% |
30,900
-15,700
| -34% | -$58K |
|
4886
CALL
Goldman Sachs BDC
GSBD
$997M
| $116K | ﹤0.01% |
8,400
-2,700
| -24% | -$36.7K |
|
4887
PUT
Haleon
HLN
$45.3B
| $116K | ﹤0.01% |
13,900
+9,800
| +239% | +$83.6K |
|
|
LNW
4888
PUT
DELISTED
Light & Wonder
LNW
| $116K | ﹤0.01% |
1,700
-17,000
| -91% | -$1.06M |
|
4889
PUT
Nexstar Media Group
NXST
$6.01B
| $116K | ﹤0.01% |
700
-5,700
| -89% | -$945K |
|
4890
PUT
Ocular Therapeutix
OCUL
$1.83B
| $116K | ﹤0.01% |
22,500
-11,600
| -34% | -$69K |
|
4891
PUT
OR Royalties Inc
OR
$5.53B
| $116K | ﹤0.01% |
7,600
+1,900
| +33% | +$30.8K |
|
4892
Pagaya Technologies
PGY
$1.35B
| $116K | ﹤0.01% |
6,961
+6,398
| +1,136% | +$79.8K |
|
4893
CALL
UFP Industries
UFPI
$4.95B
| $116K | ﹤0.01% |
1,200
-800
| -40% | -$66.7K |
|
|
EXPR
4894
CALL
DELISTED
Express, Inc.
EXPR
| $116K | ﹤0.01% |
9,845
+515
| +6% | +$7.48K |
|
|
SDC
4895
CALL
DELISTED
SmileDirectClub, Inc. Class A Common Stock
SDC
| $116K | ﹤0.01% |
219,500
-36,500
| -14% | -$14.9K |
|
|
CEI
4896
CALL
DELISTED
Camber Energy, Inc
CEI
| $116K | ﹤0.01% |
182,400
+10,000
| +6% | +$11.9K |
|
|
HIBB
4897
CALL
DELISTED
Hibbett, Inc. Common Stock
HIBB
| $116K | ﹤0.01% |
3,200
-9,300
| -74% | -$445K |
|
4898
Coca-Cola Europacific Partners
CCEP
$49.1B
| $115K | ﹤0.01% |
+1,792
| New | +$114K |
|
4899
PUT
Cognyte Software
CGNT
$655M
| $115K | ﹤0.01% |
19,000
-137,700
| -88% | -$641K |
|
4900
CALL
Deluxe
DLX
$1.25B
| $115K | ﹤0.01% |
6,600
+5,600
| +560% | +$87.9K |
|
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.