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 | |
|---|---|---|---|---|---|---|
2726
PUT
CBRE Group
CBRE
$40.8B
| $21K | ﹤0.01% |
+136
| New | +$4.83K |
|
2727
PUT
Cogent Communications
CCOI
$594M
| $21K | ﹤0.01% |
41
+26
| +173% | +$767 |
|
2728
PUT
Deluxe
DLX
$1.19B
| $21K | ﹤0.01% |
44
+22
| +100% | +$1.33K |
|
|
DVAX
2729
CALL
DELISTED
Dynavax Technologies
DVAX
| $21K | ﹤0.01% |
217
+174
| +405% | +$4.93K |
|
2730
PUT
Estee Lauder
EL
$29B
| $21K | ﹤0.01% |
156
+141
| +940% | +$11.8K |
|
2731
Fortune Brands Innovations
FBIN
$6.12B
| $21K | ﹤0.01% |
+530
| New | +$21.8K |
|
|
KYNB
2732
CALL
Kyntra Bio
KYNB
$28.5M
| $21K | ﹤0.01% |
+7
| New | +$4.24K |
|
2733
CALL
Five Below
FIVE
$11.2B
| $21K | ﹤0.01% |
45
+7
| +18% | +$254 |
|
2734
CALL
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $21K | ﹤0.01% |
53
-100
| -65% | -$7.95K |
|
2735
CALL
General Dynamics
GD
$105B
| $21K | ﹤0.01% |
157
+109
| +227% | +$15.8K |
|
2736
Green Dot
GDOT
$753M
| $21K | ﹤0.01% |
1,220
-62,693
| -98% | -$1.16M |
|
|
JNPR
2737
CALL
DELISTED
Juniper Networks
JNPR
| $21K | ﹤0.01% |
125
+92
| +279% | +$2.43K |
|
|
JWN
2738
CALL
DELISTED
Nordstrom
JWN
| $21K | ﹤0.01% |
213
+143
| +204% | +$10.8K |
|
2739
Direxion Daily Mid Cap Bull 3X ETF
MIDU
$70.2M
| $21K | ﹤0.01% |
+1,071
| New | +$26K |
|
2740
CALL
Molina Healthcare
MOH
$10.3B
| $21K | ﹤0.01% |
69
-8
| -10% | -$593 |
|
2741
CALL
Strategy Inc
MSTR
$33.5B
| $21K | ﹤0.01% |
320
+220
| +220% | +$4.36K |
|
2742
PUT
Global X MSCI Norway ETF
NORW
$86.5M
| $21K | ﹤0.01% |
146
-73
| -33% | -$1.68K |
|
2743
CALL
Norfolk Southern
NSC
$78.8B
| $21K | ﹤0.01% |
308
-88
| -22% | -$7.15K |
|
2744
PUT
NVIDIA
NVDA
$5.01T
| $21K | ﹤0.01% |
18,040
+16,000
| +784% | +$8.65K |
|
|
PPL
2745
CALL
PPL Corp
PPL
$27.3B
| $21K | ﹤0.01% |
114
-145
| -56% | -$4.54K |
|
2746
CALL
Prudential Financial
PRU
$41.7B
| $21K | ﹤0.01% |
108
-210
| -66% | -$17.6K |
|
2747
Repligen
RGEN
$7.44B
| $21K | ﹤0.01% |
+777
| New | +$28.1K |
|
2748
Saia
SAIA
$11.3B
| $21K | ﹤0.01% |
+706
| New | +$26.9K |
|
2749
PUT
Southern Company
SO
$110B
| $21K | ﹤0.01% |
199
-69
| -26% | -$3.03K |
|
|
STKL
2750
PUT
DELISTED
SunOpta
STKL
| $21K | ﹤0.01% |
+83
| New | +$753 |
|
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.