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 | |
|---|---|---|---|---|---|---|
|
LNW
4276
DELISTED
Light & Wonder
LNW
| $203K | ﹤0.01% |
2,958
+1,638
| +124% | +$102K |
|
4277
PUT
Qfin Holdings
QFIN
$1.69B
| $203K | ﹤0.01% |
11,800
+1,200
| +11% | +$20.2K |
|
4278
CALL
Garrett Motion
GTX
$5.54B
| $202K | ﹤0.01% |
26,700
-4,100
| -13% | -$32.9K |
|
4279
PUT
Interparfums
IPAR
$4.05B
| $202K | ﹤0.01% |
+1,500
| New | +$210K |
|
4280
PUT
Oscar Health
OSCR
$9.32B
| $202K | ﹤0.01% |
25,100
+5,500
| +28% | +$40.6K |
|
4281
PUT
Roivant Sciences
ROIV
$23.8B
| $202K | ﹤0.01% |
20,100
-9,800
| -33% | -$87.7K |
|
|
TWNK
4282
CALL
DELISTED
Hostess Brands, Inc. Class A Common Stock
TWNK
| $202K | ﹤0.01% |
8,000
-8,200
| -51% | -$210K |
|
4283
PUT
Babcock & Wilcox
BW
$1.24B
| $201K | ﹤0.01% |
+34,100
| New | +$200K |
|
4284
CALL
Modine Manufacturing
MOD
$9.85B
| $201K | ﹤0.01% |
6,100
+200
| +3% | +$4.99K |
|
4285
PUT
Phreesia
PHR
$690M
| $201K | ﹤0.01% |
+6,500
| New | +$203K |
|
4286
UDR
UDR
$12.9B
| $201K | ﹤0.01% |
4,685
+247
| +6% | +$10.2K |
|
4287
PUT
Valaris
VAL
$5.13B
| $201K | ﹤0.01% |
3,200
-22,300
| -87% | -$1.34M |
|
|
NVEI
4288
PUT
DELISTED
Nuvei Corporation Subordinate Voting Shares
NVEI
| $201K | ﹤0.01% |
+6,800
| New | +$240K |
|
4289
CALL
American Vanguard Corp
AVD
$70.4M
| $200K | ﹤0.01% |
+11,200
| New | +$207K |
|
4290
CALL
Krispy Kreme
DNUT
$567M
| $200K | ﹤0.01% |
13,600
-143,800
| -91% | -$2.15M |
|
4291
Herbalife
HLF
$1.29B
| $200K | ﹤0.01% |
15,174
-3,470
| -19% | -$47.2K |
|
4292
Olin
OLN
$2.52B
| $200K | ﹤0.01% |
3,892
-8,711
| -69% | -$463K |
|
4293
CALL
Webster Financial
WBS
$12.4B
| $200K | ﹤0.01% |
5,300
-5,800
| -52% | -$214K |
|
|
WCN
4294
PUT
Waste Connections
WCN
$43.5B
| $200K | ﹤0.01% |
1,400
+200
| +17% | +$27.9K |
|
4295
PUT
Citi Trends
CTRN
$550M
| $199K | ﹤0.01% |
11,300
+1,000
| +10% | +$17.2K |
|
|
SVM
4296
CALL
Silvercorp Metals
SVM
$2.06B
| $199K | ﹤0.01% |
70,800
+13,500
| +24% | +$45.9K |
|
|
PDCO
4297
CALL
DELISTED
Patterson Companies, Inc.
PDCO
| $199K | ﹤0.01% |
6,000
+5,200
| +650% | +$143K |
|
|
GOLD
4298
CALL
Gold.com Inc
GOLD
$1.16B
| $198K | ﹤0.01% |
5,300
-16,200
| -75% | -$587K |
|
4299
CALL
DTE Energy
DTE
$29.8B
| $198K | ﹤0.01% |
1,800
+1,300
| +260% | +$145K |
|
|
HIMX
4300
Himax Technologies
HIMX
$2.08B
| $198K | ﹤0.01% |
+29,413
| New | +$206K |
|
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.