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 | |
|---|---|---|---|---|---|---|
501
PUT
Autodesk
ADSK
$43B
| $434K | 0.03% |
713
+701
| +5,842% | +$35.2K |
|
|
HOT
502
PUT
DELISTED
STARWOOD HOTELS & RESORTS WORLDWIDE, INC.
HOT
| $433K | 0.03% |
909
+289
| +47% | +$22K |
|
|
QEP
503
PUT
DELISTED
QEP RESOURCES, INC.
QEP
| $432K | 0.03% |
465
+287
| +161% | +$3.96K |
|
|
P
504
CALL
DELISTED
Pandora Media Inc
P
| $430K | 0.03% |
1,664
+1,590
| +2,149% | +$27.9K |
|
505
PUT
EOG Resources
EOG
$76.7B
| $427K | 0.03% |
712
-246
| -26% | -$19.1K |
|
506
PUT
Thermo Fisher Scientific
TMO
$196B
| $427K | 0.03% |
309
+52
| +20% | +$6.78K |
|
|
DO
507
PUT
DELISTED
Diamond Offshore Drilling
DO
| $426K | 0.03% |
312
+174
| +126% | +$3.88K |
|
508
PUT
Golar LNG
GLNG
$5.06B
| $425K | 0.03% |
202
+62
| +44% | +$2.4K |
|
509
Timken Company
TKR
$9.84B
| $425K | 0.03% |
+15,490
| New | +$494K |
|
510
CALL
DuPont de Nemours
DD
$18.9B
| $424K | 0.03% |
1,077
+832
| +340% | +$96.4K |
|
511
Five Below
FIVE
$11.3B
| $423K | 0.03% |
12,599
+9,409
| +295% | +$342K |
|
512
PUT
WisdomTree US Total Dividend Fund
DTD
$1.65B
| $422K | 0.03% |
3,224
+1,766
| +121% | +$63K |
|
|
UWC
513
CALL
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $421K | 0.03% |
1,165
+511
| +78% | +$185K |
|
514
Clorox
CLX
$11.6B
| $420K | 0.03% |
+3,636
| New | +$408K |
|
|
PPLC
515
CALL
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $419K | 0.03% |
329
+30
| +10% | +$764 |
|
|
CMCSK
516
PUT
DELISTED
COMCAST CORP SPL A (NEW)
CMCSK
| $419K | 0.03% |
2,422
+1,943
| +406% | +$336K |
|
517
PUT
Cummins
CMI
$91.2B
| $418K | 0.03% |
266
-26
| -9% | -$3.21K |
|
518
Super Micro Computer
SMCI
$19.8B
| $415K | 0.03% |
152,470
+53,870
| +55% | +$143K |
|
|
CAB
519
DELISTED
Cabela's Inc
CAB
| $415K | 0.03% |
+9,120
| New | +$426K |
|
|
FGP
520
DELISTED
Ferrellgas Partners, L.P.
FGP
| $413K | 0.03% |
20,958
+12,014
| +134% | +$256K |
|
521
Consolidated Edison
ED
$41.3B
| $411K | 0.03% |
6,160
-11,701
| -66% | -$740K |
|
522
PUT
Perrigo
PRGO
$1.45B
| $410K | 0.03% |
207
+1
| +0.5% | +$183 |
|
|
DISH
523
DELISTED
DISH Network Corp.
DISH
| $408K | 0.03% |
6,996
+3,881
| +125% | +$246K |
|
|
524
Golar LNG
GLNG
$5.06B
| $407K | 0.03% |
14,622
+8,125
| +125% | +$315K |
|
525
CALL
H&R Block
HRB
$5.01B
| $407K | 0.03% |
+1,908
| New | +$64.6K |
|
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.