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 | |
|---|---|---|---|---|---|---|
3176
CALL
Dover
DOV
$27.6B
| $301K | ﹤0.01% |
34
-314
| -90% | -$25.9K |
|
3177
PUT
Standard BioTools
LAB
$329M
| $301K | ﹤0.01% |
+403
| New | +$2.87K |
|
3178
CALL
Zurn Elkay Water Solutions
ZWS
$8.09B
| $301K | ﹤0.01% |
203
-173
| -46% | -$2.46K |
|
|
RVNC
3179
CALL
DELISTED
Revance Therapeutics, Inc.
RVNC
| $300K | ﹤0.01% |
121
-85
| -41% | -$2.31K |
|
|
UNVR
3180
DELISTED
Univar Solutions Inc.
UNVR
| $300K | ﹤0.01% |
+9,797
| New | +$273K |
|
|
CRCM
3181
PUT
DELISTED
CARE.COM, INC.
CRCM
| $300K | ﹤0.01% |
136
-34
| -20% | -$681 |
|
3182
Akebia Therapeutics
AKBA
$346M
| $299K | ﹤0.01% |
33,863
-14,655
| -30% | -$131K |
|
3183
Encompass Health
EHC
$11.3B
| $299K | ﹤0.01% |
4,823
+4,817
| +80,283% | +$293K |
|
3184
CALL
Hancock Whitney
HWC
$6.15B
| $299K | ﹤0.01% |
63
+39
| +163% | +$1.96K |
|
3185
CALL
OneMain Financial
OMF
$7.07B
| $299K | ﹤0.01% |
89
+76
| +585% | +$2.66K |
|
|
TCO
3186
PUT
DELISTED
Taubman Centers Inc.
TCO
| $299K | ﹤0.01% |
50
+1
| +2% | +$62 |
|
3187
PUT
AllianceBernstein
AB
$3.51B
| $298K | ﹤0.01% |
98
-52
| -35% | -$1.55K |
|
3188
PUT
Lazard
LAZ
$4.37B
| $298K | ﹤0.01% |
62
+38
| +158% | +$1.89K |
|
3189
NeoGenomics
NEO
$1.8B
| $298K | ﹤0.01% |
+19,418
| New | +$268K |
|
3190
Petrobras
PBR
$118B
| $298K | ﹤0.01% |
24,698
-280,099
| -92% | -$3.11M |
|
|
MXIM
3191
PUT
DELISTED
Maxim Integrated Products
MXIM
| $298K | ﹤0.01% |
53
+6
| +13% | +$362 |
|
3192
Medpace
MEDP
$16.6B
| $297K | ﹤0.01% |
4,964
+4,407
| +791% | +$241K |
|
3193
World Acceptance Corp
WRLD
$924M
| $297K | ﹤0.01% |
2,599
+2,224
| +593% | +$255K |
|
3194
PUT
EnerSys
ENS
$6.93B
| $296K | ﹤0.01% |
34
+25
| +278% | +$2.01K |
|
3195
iShares US Transportation ETF
IYT
$2.33B
| $296K | ﹤0.01% |
5,804
+5,004
| +626% | +$250K |
|
3196
ON Semiconductor
ON
$34.5B
| $296K | ﹤0.01% |
16,063
-6,376
| -28% | -$136K |
|
|
VRN
3197
DELISTED
Veren
VRN
| $296K | ﹤0.01% |
46,685
-16,537
| -26% | -$109K |
|
|
FTR
3198
PUT
DELISTED
Frontier Communications Corp.
FTR
| $296K | ﹤0.01% |
458
-591
| -56% | -$3.23K |
|
|
AL
3199
DELISTED
Air Lease Corp
AL
| $295K | ﹤0.01% |
6,445
+2,087
| +48% | +$93.1K |
|
|
AZUL
3200
CALL
DELISTED
Azul
AZUL
| $295K | ﹤0.01% |
166
+80
| +93% | +$1.41K |
|
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.