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 | |
|---|---|---|---|---|---|---|
601
CALL
AstraZeneca
AZN
$263B
| $5.18M | 0.02% |
655
+177
| +37% | +$13.4K |
|
|
AET
602
PUT
DELISTED
Aetna Inc
AET
| $5.17M | 0.02% |
255
-47
| -16% | -$9.19K |
|
603
CALL
Vertex Pharmaceuticals
VRTX
$120B
| $5.17M | 0.02% |
268
-304
| -53% | -$54.1K |
|
604
CALL
Albemarle
ALB
$13.9B
| $5.16M | 0.02% |
517
-344
| -40% | -$33.3K |
|
605
PUT
Trip.com Group
TCOM
$26.8B
| $5.16M | 0.02% |
1,387
+42
| +3% | +$1.71K |
|
606
Pfizer
PFE
$141B
| $5.14M | 0.02% |
+123,072
| New | +$4.74M |
|
|
JNPR
607
CALL
DELISTED
Juniper Networks
JNPR
| $5.13M | 0.02% |
1,711
-1,718
| -50% | -$48K |
|
608
Nutanix
NTNX
$14.4B
| $5.13M | 0.02% |
120,010
+9,775
| +9% | +$516K |
|
609
CALL
Seagate
STX
$205B
| $5.11M | 0.02% |
1,080
+371
| +52% | +$19.8K |
|
|
IDTI
610
CALL
DELISTED
Integrated Device Technology I
IDTI
| $5.1M | 0.02% |
1,085
+1,004
| +1,240% | +$38.8K |
|
|
FL
611
CALL
DELISTED
Foot Locker
FL
| $5.06M | 0.02% |
992
+641
| +183% | +$31.8K |
|
|
LHCG
612
CALL
DELISTED
LHC Group LLC
LHCG
| $5.06M | 0.02% |
491
-27
| -5% | -$2.53K |
|
613
CALL
ProShares UltraShort Industrials
SIJ
$5.96M
| $5.05M | 0.02% |
255
+93
| +57% | +$22.6K |
|
|
SHNY
614
CALL
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $5.04M | 0.02% |
3,457
-1,713
| -33% | -$9.98K |
|
615
CALL
Carvana
CVNA
$44.9B
| $5.04M | 0.02% |
4,265
+2,040
| +92% | +$21.8K |
|
616
CALL
Parker-Hannifin
PH
$122B
| $5.04M | 0.02% |
274
+149
| +119% | +$25.6K |
|
617
PUT
Cboe Global Markets
CBOE
$29.5B
| $5.04M | 0.02% |
525
+107
| +26% | +$10.8K |
|
618
CALL
Rio Tinto
RIO
$150B
| $5.04M | 0.02% |
987
+386
| +64% | +$19.7K |
|
619
CALL
Fastenal
FAST
$52B
| $5.03M | 0.02% |
3,468
-276
| -7% | -$3.93K |
|
|
BERY
620
CALL
DELISTED
Berry Global Group, Inc.
BERY
| $5M | 0.02% |
1,126
+743
| +194% | +$32.6K |
|
621
PUT
PVH
PVH
$3.69B
| $5M | 0.02% |
346
-65
| -16% | -$9.61K |
|
|
HUYA
622
CALL
Huya Inc
HUYA
$547M
| $4.98M | 0.02% |
2,114
+505
| +31% | +$15K |
|
623
ServiceNow
NOW
$98.4B
| $4.98M | 0.02% |
127,405
+18,475
| +17% | +$699K |
|
624
CALL
Chubb
CB
$133B
| $4.93M | 0.02% |
369
-112
| -23% | -$15.2K |
|
|
ATHN
625
PUT
DELISTED
Athenahealth, Inc.
ATHN
| $4.93M | 0.02% |
369
-174
| -32% | -$26.1K |
|
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.