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 |
Apple
AAPL
|
+$34.5M |
| 2 |
Micron Technology
MU
|
+$33.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
+$30.8M |
| 4 |
NVIDIA
NVDA
|
+$23.5M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$22.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
TWX
Time Warner Inc
TWX
|
+$34.8M |
| 2 |
Amazon
AMZN
|
+$31.2M |
| 3 |
Tesla
TSLA
|
+$17.6M |
| 4 |
Netflix
NFLX
|
+$15.5M |
| 5 |
Advanced Micro Devices
AMD
|
+$12.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 1.23% |
| 2 | Consumer Discretionary | 0.92% |
| 3 | Communication Services | 0.73% |
| 4 | Financials | 0.62% |
| 5 | Industrials | 0.6% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3426
Iovance Biotherapeutics
IOVA
$2.19B
| $210K | ﹤0.01% |
16,429
-29,690
| -64% | -$434K |
|
3427
CALL
Logitech
LOGI
$15.5B
| $210K | ﹤0.01% |
48
-45
| -48% | -$1.82K |
|
3428
CALL
Oshkosh
OSK
$9.66B
| $210K | ﹤0.01% |
30
-132
| -81% | -$9.86K |
|
|
STOR
3429
PUT
DELISTED
STORE Capital Corporation
STOR
| $210K | ﹤0.01% |
77
+21
| +38% | +$544 |
|
|
MEET
3430
CALL
DELISTED
The Meet Group, Inc. Common Stock
MEET
| $210K | ﹤0.01% |
469
+79
| +20% | +$249 |
|
|
GGP
3431
PUT
DELISTED
GGP Inc.
GGP
| $210K | ﹤0.01% |
103
-680
| -87% | -$13.8K |
|
3432
PUT
AAR Corp
AIR
$5.46B
| $209K | ﹤0.01% |
45
-5
| -10% | -$228 |
|
3433
PUT
Brookdale Senior Living
BKD
$3.69B
| $209K | ﹤0.01% |
230
+213
| +1,253% | +$1.65K |
|
3434
Progress Software
PRGS
$1.59B
| $209K | ﹤0.01% |
5,394
-11,157
| -67% | -$424K |
|
3435
CALL
Primerica
PRI
$9.81B
| $209K | ﹤0.01% |
+21
| New | +$2.06K |
|
|
SOHU
3436
PUT
Sohu.com
SOHU
$345M
| $209K | ﹤0.01% |
59
-120
| -67% | -$4.32K |
|
3437
PUT
NCR Voyix
VYX
$1.13B
| $209K | ﹤0.01% |
114
-88
| -44% | -$1.66K |
|
|
AUD
3438
CALL
DELISTED
Audacy, Inc.
AUD
| $209K | ﹤0.01% |
277
+187
| +208% | +$1.59K |
|
|
NXTM
3439
PUT
DELISTED
NxStage Medical Inc.
NXTM
| $209K | ﹤0.01% |
75
-192
| -72% | -$5.15K |
|
3440
HUB Group
HUBG
$2.93B
| $208K | ﹤0.01% |
8,360
+7,012
| +520% | +$165K |
|
3441
Ionis Pharmaceuticals
IONS
$9.25B
| $208K | ﹤0.01% |
5,015
-12,072
| -71% | -$535K |
|
|
NFX
3442
DELISTED
Newfield Exploration
NFX
| $208K | ﹤0.01% |
6,894
-22,024
| -76% | -$623K |
|
3443
Aurinia Pharmaceuticals
AUPH
$1.96B
| $207K | ﹤0.01% |
36,768
+20,162
| +121% | +$112K |
|
3444
PUT
Cars.com
CARS
$660M
| $207K | ﹤0.01% |
73
-30
| -29% | -$825 |
|
3445
CALL
Ryman Hospitality Properties
RHP
$8.52B
| $207K | ﹤0.01% |
25
+21
| +525% | +$1.7K |
|
|
UNT
3446
CALL
DELISTED
UNIT Corporation
UNT
| $207K | ﹤0.01% |
81
-27
| -25% | -$597 |
|
|
LGCY
3447
CALL
DELISTED
Legacy Reserves Inc. Common Stock
LGCY
| $207K | ﹤0.01% |
300
+190
| +173% | +$1.17K |
|
3448
CALL
Fabrinet
FN
$16.9B
| $206K | ﹤0.01% |
56
-80
| -59% | -$2.74K |
|
3449
iShares US Medical Devices ETF
IHI
$3.06B
| $206K | ﹤0.01% |
6,174
+5,382
| +680% | +$175K |
|
3450
Rapid7
RPD
$643M
| $206K | ﹤0.01% |
+7,323
| New | +$218K |
|
Similar funds
Simplex Trading's Q2 2018 Portfolio in Review
As of Q2 2018, Simplex Trading held 8,400 positions worth $25.5B, up 1,022% from $2.27B the previous quarter. Its ten largest holdings account for 29% of the portfolio.
Simplex Trading's Q2 2018 filing shows 2,282 new, 2,314 increased, 2,591 reduced and 1,035 closed positions. Its largest new stake was Alphabet (Google) Class C: 291,860 shares worth $16.3M. The largest sale was Time Warner Inc, an estimated $34.8M.
By sector, the portfolio is most concentrated in Technology at 1.2% of assets, down from 6.2% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q2 2018 buy was Alphabet (Google) Class C: 291,860 shares worth $16.3M.
- Simplex Trading added most to Apple in Q2 2018, an estimated $34.5M increase.
- Simplex Trading's biggest Q2 2018 reduction was Amazon, cutting an estimated $31.2M.
- Simplex Trading fully exited Time Warner Inc in Q2 2018, selling an estimated $34.8M.
- Simplex Trading's ten largest holdings make up 29% of its $25.5B portfolio in Q2 2018.
- Simplex Trading opened 2,282 new positions and closed 1,035 in Q2 2018.
- Simplex Trading's portfolio value rose 1,022% quarter-over-quarter to $25.5B.
Based on Simplex Trading's 13F filing for Q2 2018, filed 30 Jul 2018.