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 |
Alphabet (Google) Class C
GOOG
|
+$54.6M |
| 2 |
Apple
AAPL
|
+$29.1M |
| 3 |
Meta Platforms (Facebook)
META
|
+$15.7M |
| 4 |
IBM
IBM
|
+$13.8M |
| 5 |
Baidu
BIDU
|
+$10.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$10.1M |
| 2 |
McDonald's
MCD
|
+$8.46M |
| 3 |
Ralph Lauren
RL
|
+$5.36M |
| 4 |
Intel
INTC
|
+$5.04M |
| 5 |
WBA
Walgreens Boots Alliance
WBA
|
+$4.76M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 14.27% |
| 2 | Technology | 10.3% |
| 3 | Healthcare | 7.76% |
| 4 | Consumer Discretionary | 6.32% |
| 5 | Financials | 5.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2701
CALL
Burlington
BURL
$22B
| $15K | ﹤0.01% |
133
+108
| +432% | +$5.77K |
|
2702
Compugen
CGEN
$216M
| $15K | ﹤0.01% |
2,196
+1,294
| +143% | +$9.06K |
|
2703
CEMIG Preferred Shares
CIG
$6.09B
| $15K | ﹤0.01% |
7,941
+4,661
| +142% | +$11K |
|
|
DENN
2704
DELISTED
Denny's
DENN
| $15K | ﹤0.01% |
+1,346
| New | +$15K |
|
2705
PUT
Healthpeak Properties
DOC
$15.4B
| $15K | ﹤0.01% |
33
+24
| +267% | +$874 |
|
|
DVAX
2706
CALL
DELISTED
Dynavax Technologies
DVAX
| $15K | ﹤0.01% |
43
-70
| -62% | -$1.52K |
|
2707
CALL
Eversource Energy
ES
$28.2B
| $15K | ﹤0.01% |
173
+61
| +54% | +$2.96K |
|
2708
iShares MSCI Italy ETF
EWI
$911M
| $15K | ﹤0.01% |
+510
| New | +$15.7K |
|
2709
PUT
Groupon
GRPN
$980M
| $15K | ﹤0.01% |
4
-12
| -75% | -$1.55K |
|
2710
iShares S&P GSCI Commodity-Indexed Trust
GSG
$1.02B
| $15K | ﹤0.01% |
740
-266
| -26% | -$5.59K |
|
|
HIMX
2711
PUT
Himax Technologies
HIMX
$2.2B
| $15K | ﹤0.01% |
59
-61
| -51% | -$415 |
|
2712
IDEX
IEX
$16.5B
| $15K | ﹤0.01% |
+192
| New | +$14.9K |
|
2713
CALL
Jabil
JBL
$32.8B
| $15K | ﹤0.01% |
+54
| New | +$1.27K |
|
|
JNPR
2714
CALL
DELISTED
Juniper Networks
JNPR
| $15K | ﹤0.01% |
33
-64
| -66% | -$1.68K |
|
|
JWN
2715
PUT
DELISTED
Nordstrom
JWN
| $15K | ﹤0.01% |
55
+25
| +83% | +$1.9K |
|
2716
Karyopharm Therapeutics
KPTI
$168M
| $15K | ﹤0.01% |
+37
| New | +$16K |
|
2717
CALL
Lockheed Martin
LMT
$134B
| $15K | ﹤0.01% |
131
-47
| -26% | -$9.05K |
|
2718
PUT
National Grid
NGG
$82.7B
| $15K | ﹤0.01% |
37
-23
| -38% | -$1.5K |
|
2719
OraSure Technologies
OSUR
$273M
| $15K | ﹤0.01% |
2,932
+1,447
| +97% | +$8.94K |
|
2720
CALL
Paylocity
PCTY
$6.71B
| $15K | ﹤0.01% |
+25
| New | +$805 |
|
2721
Protalix BioTherapeutics
PLX
$191M
| $15K | ﹤0.01% |
785
-1,605
| -67% | -$33.3K |
|
2722
CALL
PVH
PVH
$3.71B
| $15K | ﹤0.01% |
75
+1
| +1% | +$109 |
|
|
2723
PUT
PVH
PVH
$3.71B
| $15K | ﹤0.01% |
21
-204
| -91% | -$22.1K |
|
2724
CALL
Skywest
SKYW
$4.11B
| $15K | ﹤0.01% |
+159
| New | +$2.37K |
|
2725
PUT
Teucrium Soybean Fund
SOYB
$63.7M
| $15K | ﹤0.01% |
35
-3
| -8% | -$58 |
|
Similar funds
Simplex Trading's Q2 2015 Portfolio in Review
As of Q2 2015, Simplex Trading held 6,639 positions worth $1.19B, up 39% from $860M the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $279M of net new capital in Q2 2015, opening 1,607 new positions and adding to 1,829 existing holdings. Its largest new stake was IBM: 85,948 shares worth $13.4M.
By sector, the portfolio is most concentrated in Communication Services at 14% of assets, up from 7.8% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Intel, an estimated $5.04M trimmed.
- Simplex Trading's largest Q2 2015 buy was IBM: 85,948 shares worth $13.4M.
- Simplex Trading added most to Alphabet (Google) Class C in Q2 2015, an estimated $54.6M increase.
- Simplex Trading's biggest Q2 2015 reduction was Intel, cutting an estimated $5.04M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q2 2015, selling an estimated $10.1M.
- Simplex Trading's ten largest holdings make up 20% of its $1.19B portfolio in Q2 2015.
- Simplex Trading opened 1,607 new positions and closed 1,438 in Q2 2015.
- Simplex Trading's portfolio value rose 39% quarter-over-quarter to $1.19B.
Based on Simplex Trading's 13F filing for Q2 2015, filed 8 Jul 2015.