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 |
Amazon
AMZN
|
+$148M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$67.3M |
| 3 |
Meta Platforms (Facebook)
META
|
+$63.2M |
| 4 |
Goldman Sachs
GS
|
+$23.9M |
| 5 |
Citigroup
C
|
+$23.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Berkshire Hathaway Class B
BRK.B
|
+$47.5M |
| 2 |
Apple
AAPL
|
+$46M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$44.5M |
| 4 |
Micron Technology
MU
|
+$29.1M |
| 5 |
Adobe
ADBE
|
+$22.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 1.13% |
| 2 | Communication Services | 0.89% |
| 3 | Technology | 0.68% |
| 4 | Industrials | 0.51% |
| 5 | Healthcare | 0.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
AHL
2401
CALL
DELISTED
ASPEN Insurance Holding Limited
AHL
| $622K | ﹤0.01% |
149
+18
| +14% | +$719 |
|
2402
PUT
Sinclair Inc
SBGI
$974M
| $620K | ﹤0.01% |
219
-212
| -49% | -$6.03K |
|
2403
Enterprise Products Partners
EPD
$83.8B
| $619K | ﹤0.01% |
21,547
+20,216
| +1,519% | +$584K |
|
2404
CALL
Iovance Biotherapeutics
IOVA
$2.23B
| $619K | ﹤0.01% |
551
+515
| +1,431% | +$7.31K |
|
|
PE
2405
DELISTED
PARSLEY ENERGY INC
PE
| $618K | ﹤0.01% |
21,141
+2,958
| +16% | +$87.8K |
|
|
GES
2406
PUT
DELISTED
Guess Inc
GES
| $616K | ﹤0.01% |
273
-16
| -6% | -$363 |
|
2407
PUT
Prologis
PLD
$138B
| $616K | ﹤0.01% |
91
-8
| -8% | -$526 |
|
2408
CME Group
CME
$92.2B
| $615K | ﹤0.01% |
3,617
-3,810
| -51% | -$641K |
|
2409
CALL
Canadian Pacific Kansas City
CP
$82B
| $614K | ﹤0.01% |
145
-785
| -84% | -$31.4K |
|
2410
Walmart Inc
WMT
$871B
| $614K | ﹤0.01% |
19,644
-269,703
| -93% | -$8.25M |
|
2411
PUT
Cogent Communications
CCOI
$594M
| $613K | ﹤0.01% |
110
+109
| +10,900% | +$5.84K |
|
2412
PENN Entertainment
PENN
$2.74B
| $613K | ﹤0.01% |
+18,651
| New | +$621K |
|
2413
Match Group
MTCH
$8.84B
| $612K | ﹤0.01% |
10,578
-24,095
| -69% | -$1.13M |
|
2414
Saic
SAIC
$5.03B
| $612K | ﹤0.01% |
+7,604
| New | +$646K |
|
2415
CALL
Knight Transportation
KNX
$11.8B
| $610K | ﹤0.01% |
177
+95
| +116% | +$3.33K |
|
|
YRD
2416
CALL
Yiren Digital
YRD
$103M
| $610K | ﹤0.01% |
332
+305
| +1,130% | +$5.56K |
|
|
HEP
2417
CALL
DELISTED
Holly Energy Partners, L.P.
HEP
| $610K | ﹤0.01% |
194
+160
| +471% | +$4.87K |
|
2418
Amneal Pharmaceuticals
AMRX
$5.72B
| $608K | ﹤0.01% |
27,405
+297
| +1% | +$6.25K |
|
|
MRSH
2419
Marsh
MRSH
$86.3B
| $608K | ﹤0.01% |
7,360
+4,313
| +142% | +$365K |
|
|
BEL
2420
PUT
DELISTED
Belmond Ltd.
BEL
| $607K | ﹤0.01% |
333
-36
| -10% | -$515 |
|
2421
CALL
O-I Glass
OI
$1.39B
| $606K | ﹤0.01% |
323
+316
| +4,514% | +$5.68K |
|
2422
CALL
Weyerhaeuser
WY
$17.3B
| $606K | ﹤0.01% |
188
-518
| -73% | -$18K |
|
2423
CALL
Charles River Laboratories
CRL
$10.9B
| $605K | ﹤0.01% |
45
+5
| +13% | +$617 |
|
2424
CALL
Team
TISI
$77.7M
| $605K | ﹤0.01% |
27
-7
| -21% | -$1.58K |
|
|
SAVE
2425
PUT
DELISTED
Spirit Airlines, Inc.
SAVE
| $605K | ﹤0.01% |
129
+67
| +108% | +$2.96K |
|
Similar funds
Simplex Trading's Q3 2018 Portfolio in Review
As of Q3 2018, Simplex Trading held 8,699 positions worth $31.1B, up 22% from $25.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q3 2018 filing shows 1,336 new, 3,066 increased, 2,755 reduced and 1,315 closed positions. Its largest new stake was Invesco QQQ Trust: 371,806 shares worth $69.1M. The largest sale was Berkshire Hathaway Class B, an estimated $47.5M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 1.1% of assets, up from 0.92% a quarter earlier, followed by Communication Services and Technology.
- Simplex Trading's largest Q3 2018 buy was Invesco QQQ Trust: 371,806 shares worth $69.1M.
- Simplex Trading added most to Amazon in Q3 2018, an estimated $148M increase.
- Simplex Trading's biggest Q3 2018 reduction was Apple, cutting an estimated $46M.
- Simplex Trading fully exited Berkshire Hathaway Class B in Q3 2018, selling an estimated $47.5M.
- Simplex Trading's ten largest holdings make up 34% of its $31.1B portfolio in Q3 2018.
- Simplex Trading opened 1,336 new positions and closed 1,315 in Q3 2018.
- Simplex Trading's portfolio value rose 22% quarter-over-quarter to $31.1B.
Based on Simplex Trading's 13F filing for Q3 2018, filed 23 Oct 2018.