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 |
Alibaba
BABA
|
+$50.3M |
| 2 |
Boeing
BA
|
+$24.3M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 4 |
Biogen
BIIB
|
+$15.9M |
| 5 |
FedEx
FDX
|
+$15.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$60.3M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Netflix
NFLX
|
+$19M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$17.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.49% |
| 2 | Technology | 0.48% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.35% |
| 5 | Communication Services | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
226
PUT
Lowe's Companies
LOW
$113B
| $21.5M | 0.06% |
1,959
+491
| +33% | +$51.8K |
|
227
CALL
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$26.8B
| $21.5M | 0.06% |
611
+355
| +139% | +$124K |
|
228
PUT
Medtronic
MDT
$105B
| $21.5M | 0.06% |
1,977
-792
| -29% | -$82.6K |
|
229
PUT
Wynn Resorts
WYNN
$10B
| $21.4M | 0.06% |
1,969
-298
| -13% | -$35.5K |
|
|
ATVI
230
CALL
DELISTED
Activision Blizzard
ATVI
| $21.3M | 0.06% |
4,021
+1,027
| +34% | +$51.2K |
|
231
CALL
Illumina
ILMN
$29.4B
| $21.2M | 0.06% |
717
+464
| +183% | +$137K |
|
232
CALL
Trade Desk
TTD
$7.95B
| $21M | 0.06% |
11,210
+3,080
| +38% | +$73.3K |
|
233
PUT
Honeywell
HON
$77.2B
| $20.9M | 0.06% |
1,423
+939
| +194% | +$149K |
|
|
STZ.B
234
CALL
DELISTED
CONSTELLATION BRANDS, INC. CLASS B
STZ.B
| $20.9M | 0.06% |
1,006
+35
| +4% | +$6.99K |
|
235
CALL
Oracle
ORCL
$345B
| $20.8M | 0.06% |
3,771
-558
| -13% | -$30.8K |
|
236
PUT
MongoDB
MDB
$23.9B
| $20.4M | 0.06% |
1,693
+920
| +119% | +$133K |
|
237
PUT
Applied Materials
AMAT
$441B
| $20.3M | 0.06% |
4,075
+31
| +0.8% | +$1.5K |
|
|
VMW
238
PUT
DELISTED
VMware, Inc
VMW
| $20.1M | 0.06% |
1,338
-454
| -25% | -$71.5K |
|
|
RDS.A
239
PUT
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $20M | 0.06% |
3,366
+412
| +14% | +$24.5K |
|
240
CALL
Abbott
ABT
$176B
| $20M | 0.06% |
2,387
+398
| +20% | +$33.8K |
|
241
CALL
Mercado Libre
MELI
$90.8B
| $20M | 0.06% |
362
+199
| +122% | +$121K |
|
242
CALL
Coca-Cola
KO
$349B
| $19.8M | 0.06% |
3,644
-800
| -18% | -$42.8K |
|
243
CALL
Intuitive Surgical
ISRG
$119B
| $19.8M | 0.06% |
1,098
-204
| -16% | -$35.3K |
|
244
CALL
Automatic Data Processing
ADP
$96.8B
| $19.7M | 0.06% |
1,221
+599
| +96% | +$98.9K |
|
|
245
PUT
Illumina
ILMN
$29.4B
| $19.6M | 0.06% |
663
+530
| +398% | +$156K |
|
246
CALL
Universal Display
OLED
$3.73B
| $19.5M | 0.06% |
1,161
+686
| +144% | +$137K |
|
247
CALL
Amgen
AMGN
$199B
| $19.4M | 0.06% |
1,000
-688
| -41% | -$132K |
|
248
CALL
NextEra Energy
NEE
$188B
| $18.9M | 0.05% |
3,248
-356
| -10% | -$19.3K |
|
249
CALL
PepsiCo
PEP
$184B
| $18.9M | 0.05% |
1,377
-1,134
| -45% | -$151K |
|
250
CALL
BP
BP
$113B
| $18.8M | 0.05% |
4,944
+680
| +16% | +$25.9K |
|
Similar funds
Simplex Trading's Q3 2019 Portfolio in Review
As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
- Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
- Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
- Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
- Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
- Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.
Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.