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 | |
|---|---|---|---|---|---|---|
1301
LyondellBasell Industries
LYB
$19.9B
| $1.89M | 0.01% |
18,418
+15,577
| +548% | +$1.7M |
|
1302
CALL
Thomson Reuters
TRI
$37.4B
| $1.89M | 0.01% |
356
+243
| +215% | +$12.2K |
|
1303
PUT
Mid-America Apartment Communities
MAA
$15.5B
| $1.88M | 0.01% |
188
+48
| +34% | +$4.86K |
|
|
MXIM
1304
CALL
DELISTED
Maxim Integrated Products
MXIM
| $1.88M | 0.01% |
334
+258
| +339% | +$15.6K |
|
1305
Viatris
VTRS
$20.1B
| $1.88M | 0.01% |
+51,447
| New | +$1.93M |
|
|
NAV
1306
PUT
DELISTED
Navistar International
NAV
| $1.88M | 0.01% |
489
-41
| -8% | -$1.71K |
|
1307
PUT
Protolabs
PRLB
$1.87B
| $1.88M | 0.01% |
116
+88
| +314% | +$12.4K |
|
1308
CALL
Zions Bancorporation
ZION
$10.1B
| $1.88M | 0.01% |
374
+113
| +43% | +$5.97K |
|
|
TMX
1309
CALL
DELISTED
Terminix Global Holdings, Inc.
TMX
| $1.87M | 0.01% |
451
+152
| +51% | +$6.09K |
|
|
ATHN
1310
DELISTED
Athenahealth, Inc.
ATHN
| $1.87M | 0.01% |
14,025
-2,079
| -13% | -$311K |
|
1311
CALL
Equifax
EFX
$19.6B
| $1.87M | 0.01% |
143
-47
| -25% | -$6.12K |
|
|
AXON
1312
CALL
Axon Enterprise
AXON
$39.6B
| $1.86M | 0.01% |
272
-117
| -30% | -$7.89K |
|
|
BBBY
1313
PUT
DELISTED
Bed Bath & Beyond Inc
BBBY
| $1.86M | 0.01% |
1,238
-241
| -16% | -$4.51K |
|
1314
CALL
Abercrombie & Fitch
ANF
$4.04B
| $1.86M | 0.01% |
879
+78
| +10% | +$1.89K |
|
1315
PUT
Editas Medicine
EDIT
$419M
| $1.85M | 0.01% |
583
+61
| +12% | +$1.97K |
|
1316
PUT
YPF
YPF
$20.4B
| $1.84M | 0.01% |
1,194
-545
| -31% | -$8.49K |
|
1317
PUT
Sempra
SRE
$61.1B
| $1.84M | 0.01% |
324
-200
| -38% | -$11.6K |
|
|
AM
1318
CALL
DELISTED
ANTERO MIDSTREAM PARTNERS LP
AM
| $1.84M | 0.01% |
642
+635
| +9,071% | +$19.5K |
|
1319
CALL
Dollar General
DG
$25.4B
| $1.84M | 0.01% |
168
-191
| -53% | -$19.9K |
|
1320
PUT
Ecopetrol
EC
$33.6B
| $1.84M | 0.01% |
682
+31
| +5% | +$686 |
|
1321
PUT
Tenet Healthcare
THC
$17.1B
| $1.83M | 0.01% |
645
+342
| +113% | +$11.3K |
|
1322
iShares Russell 1000 Value ETF
IWD
$81.3B
| $1.83M | 0.01% |
14,425
+8,529
| +145% | +$1.07M |
|
1323
PUT
Encompass Health
EHC
$11B
| $1.82M | 0.01% |
294
+293
| +29,300% | +$17.8K |
|
1324
PUT
TE Connectivity
TEL
$57.6B
| $1.82M | 0.01% |
207
+5
| +2% | +$460 |
|
1325
Skyworks Solutions
SWKS
$9.1B
| $1.82M | 0.01% |
20,032
-8,725
| -30% | -$817K |
|
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.