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 | |
|---|---|---|---|---|---|---|
|
XNPT
2476
PUT
DELISTED
XENOPORT, INC.
XNPT
| $28K | ﹤0.01% |
+58
| New | +$366 |
|
|
RLD
2477
DELISTED
REALD INC COM STK
RLD
| $28K | ﹤0.01% |
2,972
-4,373
| -60% | -$47.4K |
|
|
RNO
2478
PUT
DELISTED
RHINO RESOURCE PARTNERS LP COM UNIT REPSTG LTD (DE)
RNO
| $28K | ﹤0.01% |
66
-67
| -50% | -$72 |
|
|
CJES
2479
PUT
DELISTED
C&J ENERGY SVCS LTD
CJES
| $28K | ﹤0.01% |
52
+19
| +58% | +$139 |
|
|
DGI
2480
DELISTED
DigitalGlobe Inc.
DGI
| $28K | ﹤0.01% |
+1,510
| New | +$35.7K |
|
2481
PUT
Accenture
ACN
$89.9B
| $27K | ﹤0.01% |
133
+24
| +22% | +$2.38K |
|
|
AGEN
2482
Agenus
AGEN
$249M
| $27K | ﹤0.01% |
301
-65
| -18% | -$9.62K |
|
2483
CALL
A.O. Smith
AOS
$8.38B
| $27K | ﹤0.01% |
200
+50
| +33% | +$1.71K |
|
2484
PUT
Clean Energy Fuels
CLNE
$447M
| $27K | ﹤0.01% |
49
-109
| -69% | -$565 |
|
2485
CALL
Canadian Solar
CSIQ
$906M
| $27K | ﹤0.01% |
381
+32
| +9% | +$711 |
|
2486
Ecopetrol
EC
$32.9B
| $27K | ﹤0.01% |
3,226
-427
| -12% | -$4.43K |
|
|
ELME
2487
Elme Communities
ELME
$132M
| $27K | ﹤0.01% |
1,100
+611
| +125% | +$15.8K |
|
2488
iShares MSCI France ETF
EWQ
$324M
| $27K | ﹤0.01% |
+1,135
| New | +$29.1K |
|
2489
CALL
Frontline
FRO
$8.75B
| $27K | ﹤0.01% |
40
+13
| +48% | +$174 |
|
2490
PUT
G-III Apparel Group
GIII
$1.47B
| $27K | ﹤0.01% |
+64
| New | +$4.39K |
|
2491
PUT
Corning
GLW
$126B
| $27K | ﹤0.01% |
259
+215
| +489% | +$3.87K |
|
2492
Huntington Bancshares
HBAN
$35.1B
| $27K | ﹤0.01% |
+2,574
| New | +$28.7K |
|
2493
PUT
H&R Block
HRB
$5.18B
| $27K | ﹤0.01% |
60
+40
| +200% | +$1.35K |
|
2494
CALL
Ingles Markets
IMKTA
$1.63B
| $27K | ﹤0.01% |
112
+14
| +14% | +$689 |
|
|
IRBT
2495
PUT
DELISTED
iRobot
IRBT
| $27K | ﹤0.01% |
72
+25
| +53% | +$760 |
|
2496
Middleby
MIDD
$6.05B
| $27K | ﹤0.01% |
258
-442
| -63% | -$50.9K |
|
2497
PG&E
PCG
$47.8B
| $27K | ﹤0.01% |
+520
| New | +$26.6K |
|
2498
CALL
Red Robin
RRGB
$134M
| $27K | ﹤0.01% |
186
+181
| +3,620% | +$15.2K |
|
2499
Constellation Brands
STZ
$22.2B
| $27K | ﹤0.01% |
220
-14,911
| -99% | -$1.84M |
|
2500
CALL
Texas Capital Bancshares
TCBI
$4.31B
| $27K | ﹤0.01% |
48
+41
| +586% | +$2.29K |
|
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.