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 | |
|---|---|---|---|---|---|---|
3301
CALL
STAAR Surgical
STAA
$1.14B
| $509K | ﹤0.01% |
9,700
-3,900
| -29% | -$238K |
|
3302
Acadia Realty Trust
AKR
$2.99B
| $507K | ﹤0.01% |
35,251
-8,713
| -20% | -$118K |
|
3303
PUT
Progyny
PGNY
$2.47B
| $507K | ﹤0.01% |
12,900
-19,100
| -60% | -$689K |
|
|
RC
3304
CALL
Ready Capital
RC
$265M
| $507K | ﹤0.01% |
45,000
-4,400
| -9% | -$46.5K |
|
|
GOL
3305
DELISTED
Gol Linhas Aéreas Inteligentes S.A. American Depositary Shares (Each representing Ten Preferred Shares)
GOL
| $507K | ﹤0.01% |
92,965
+22,314
| +32% | +$75.5K |
|
3306
Innodata
INOD
$1.94B
| $506K | ﹤0.01% |
44,693
+8,015
| +22% | +$74.5K |
|
3307
CALL
Ero Copper
ERO
$2.73B
| $505K | ﹤0.01% |
25,000
+3,400
| +16% | +$64.3K |
|
|
ETNB
3308
CALL
DELISTED
89bio
ETNB
| $505K | ﹤0.01% |
26,700
+5,100
| +24% | +$89.6K |
|
3309
CALL
Live Oak Bancshares
LOB
$1.95B
| $505K | ﹤0.01% |
19,200
-200
| -1% | -$4.71K |
|
|
TWKS
3310
CALL
DELISTED
Thoughtworks Holding, Inc. Common Stock
TWKS
| $505K | ﹤0.01% |
67,000
+42,400
| +172% | +$314K |
|
|
SCPL
3311
PUT
DELISTED
SciPlay Corporation Class A Common Stock
SCPL
| $505K | ﹤0.01% |
25,700
+4,800
| +23% | +$87.2K |
|
3312
AirSculpt Technologies
AIRS
$331M
| $504K | ﹤0.01% |
58,561
+32,383
| +124% | +$212K |
|
3313
PUT
Teekay Tankers
TNK
$2.63B
| $504K | ﹤0.01% |
13,200
+800
| +6% | +$31.1K |
|
3314
CALL
MidCap Financial Investment
MFIC
$790M
| $503K | ﹤0.01% |
40,100
+21,100
| +111% | +$246K |
|
3315
PUT
G-III Apparel Group
GIII
$1.52B
| $501K | ﹤0.01% |
26,000
+21,100
| +431% | +$363K |
|
3316
CALL
Phathom Pharmaceuticals
PHAT
$953M
| $501K | ﹤0.01% |
35,000
+20,600
| +143% | +$238K |
|
3317
PUT
Tecnoglass
TGLS
$2.01B
| $501K | ﹤0.01% |
9,700
+6,900
| +246% | +$307K |
|
3318
Commault Systems
CVLT
$6.19B
| $500K | ﹤0.01% |
+6,887
| New | +$448K |
|
3319
CALL
Epsilon Energy
EPSN
$173M
| $500K | ﹤0.01% |
93,700
-55,000
| -37% | -$284K |
|
3320
PUT
Sanmina
SANM
$11.2B
| $500K | ﹤0.01% |
8,300
+8,100
| +4,050% | +$444K |
|
3321
AeroVironment
AVAV
$7.81B
| $499K | ﹤0.01% |
4,887
+2,208
| +82% | +$222K |
|
3322
BlackLine
BL
$1.8B
| $499K | ﹤0.01% |
+9,282
| New | +$515K |
|
3323
PUT
Host Hotels & Resorts
HST
$17.1B
| $499K | ﹤0.01% |
29,700
+2,000
| +7% | +$33.5K |
|
3324
PUT
Kulicke & Soffa
KLIC
$5.14B
| $499K | ﹤0.01% |
8,400
-22,400
| -73% | -$1.16M |
|
3325
CALL
RadNet
RDNT
$4.84B
| $499K | ﹤0.01% |
15,300
-13,000
| -46% | -$378K |
|
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.