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 |
iShares Russell 2000 ETF
IWM
|
+$29.8M |
| 2 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$17.1M |
| 3 |
Walt Disney
DIS
|
+$14.8M |
| 4 |
Gilead Sciences
GILD
|
+$11.8M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$11.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$92.9M |
| 2 |
Apple
AAPL
|
+$22.5M |
| 3 |
Meta Platforms (Facebook)
META
|
+$20.5M |
| 4 |
IBM
IBM
|
+$12.7M |
| 5 |
Baidu
BIDU
|
+$10M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Healthcare | 6.46% |
| 2 | Communication Services | 4.66% |
| 3 | Consumer Discretionary | 4.6% |
| 4 | Technology | 4.57% |
| 5 | Financials | 4.49% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
301
Element Solutions
ESI
$9.35B
| $781K | 0.06% |
61,779
+61,311
| +13,101% | +$1.26M |
|
302
PUT
Brookdale Senior Living
BKD
$3.5B
| $771K | 0.06% |
1,156
+1,141
| +7,607% | +$33.7K |
|
303
Direxion Daily S&P 500 Bull 3x ETF
SPXL
$6.82B
| $770K | 0.06% |
44,600
+43,468
| +3,840% | +$905K |
|
304
Target
TGT
$62.6B
| $769K | 0.06% |
9,780
+5,357
| +121% | +$428K |
|
305
CALL
American Airlines Group
AAL
$9.75B
| $766K | 0.06% |
4,582
+1,720
| +60% | +$70.6K |
|
306
PUT
Merck
MRK
$315B
| $766K | 0.06% |
2,079
+1,344
| +183% | +$71.4K |
|
307
CALL
Starbucks
SBUX
$119B
| $766K | 0.06% |
2,900
+2,589
| +832% | +$145K |
|
|
HES
308
DELISTED
Hess
HES
| $765K | 0.06% |
15,297
+8,301
| +119% | +$475K |
|
|
ALDR
309
DELISTED
Alder Biopharmaceuticals
ALDR
| $764K | 0.06% |
23,346
+21,268
| +1,023% | +$904K |
|
310
Intel
INTC
$516B
| $755K | 0.06% |
25,070
-110,403
| -81% | -$3.19M |
|
311
PUT
Bristol-Myers Squibb
BMY
$124B
| $747K | 0.05% |
2,763
+2,036
| +280% | +$129K |
|
312
PUT
Cheniere Energy
LNG
$56B
| $744K | 0.05% |
1,054
+572
| +119% | +$35.3K |
|
|
SCTY
313
DELISTED
SolarCity Corporation
SCTY
| $744K | 0.05% |
17,422
+8,899
| +104% | +$447K |
|
|
TWC
314
CALL
DELISTED
TIME WARNER CABLE INC NEW COM STK
TWC
| $742K | 0.05% |
773
-313
| -29% | -$58.5K |
|
315
Puma Biotechnology
PBYI
$401M
| $739K | 0.05% |
9,810
+4,996
| +104% | +$472K |
|
|
VNET
316
VNET Group
VNET
$2.23B
| $732K | 0.05% |
40,049
+24,956
| +165% | +$475K |
|
|
EMBJ
317
Embraer S.A. ADS
EMBJ
$11.8B
| $729K | 0.05% |
28,534
+15,811
| +124% | +$430K |
|
318
Zimmer Biomet
ZBH
$17.2B
| $727K | 0.05% |
7,974
+3,817
| +92% | +$383K |
|
319
PUT
Palo Alto Networks
PANW
$273B
| $723K | 0.05% |
6,822
+3,450
| +102% | +$102K |
|
320
PUT
Energy Transfer Partners
ET
$70.1B
| $717K | 0.05% |
1,237
+599
| +94% | +$16.9K |
|
321
DTE Energy
DTE
$30.9B
| $711K | 0.05% |
10,396
-6,774
| -39% | -$453K |
|
322
Travelers Companies
TRV
$82.1B
| $711K | 0.05% |
7,146
+4,514
| +172% | +$462K |
|
323
CALL
McDonald's
MCD
$187B
| $700K | 0.05% |
2,808
+1,592
| +131% | +$155K |
|
324
CALL
Mastercard
MA
$470B
| $696K | 0.05% |
1,262
+411
| +48% | +$38.6K |
|
325
PUT
Petrobras
PBR
$122B
| $695K | 0.05% |
1,161
+415
| +56% | +$2.53K |
|
Similar funds
Simplex Trading's Q3 2015 Portfolio in Review
As of Q3 2015, Simplex Trading held 7,014 positions worth $1.36B, up 14% from $1.19B the previous quarter. Its ten largest holdings account for 15% of the portfolio.
Simplex Trading's Q3 2015 filing shows 1,810 new, 2,203 increased, 1,391 reduced and 1,420 closed positions. Its largest new stake was iShares Russell 2000 ETF: 251,486 shares worth $27.5M. The largest sale was Alphabet (Google) Class C, an estimated $92.9M.
By sector, the portfolio is most concentrated in Healthcare at 6.5% of assets, down from 7.8% a quarter earlier, followed by Communication Services and Consumer Discretionary.
- Simplex Trading's largest Q3 2015 buy was iShares Russell 2000 ETF: 251,486 shares worth $27.5M.
- Simplex Trading added most to iShares MSCI Emerging Markets ETF in Q3 2015, an estimated $11.2M increase.
- Simplex Trading's biggest Q3 2015 reduction was Alphabet (Google) Class C, cutting an estimated $92.9M.
- Simplex Trading fully exited IBM in Q3 2015, selling an estimated $12.7M.
- Simplex Trading's ten largest holdings make up 15% of its $1.36B portfolio in Q3 2015.
- Simplex Trading opened 1,810 new positions and closed 1,420 in Q3 2015.
- Simplex Trading's portfolio value rose 14% quarter-over-quarter to $1.36B.
Based on Simplex Trading's 13F filing for Q3 2015, filed 8 Oct 2015.