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 | |
|---|---|---|---|---|---|---|
2976
CALL
Insmed
INSM
$22.8B
| $11K | ﹤0.01% |
155
+110
| +244% | +$2.5K |
|
2977
Direxion Daily Junior Gold Miners Index Bear 2X ETF
JDST
$30.4M
| – | – |
0
| – | – |
|
2978
State Street SPDR S&P Bank ETF
KBE
$1.64B
| $11K | ﹤0.01% |
326
-785
| -71% | -$27.5K |
|
2979
PUT
Kodak
KODK
$779M
| $11K | ﹤0.01% |
52
+7
| +16% | +$133 |
|
2980
PUT
Labcorp
LH
$24.7B
| $11K | ﹤0.01% |
+43
| New | +$4.48K |
|
2981
PUT
Marathon Petroleum
MPC
$91.1B
| $11K | ﹤0.01% |
360
-78
| -18% | -$3.97K |
|
2982
CALL
Meritage Homes
MTH
$4.87B
| $11K | ﹤0.01% |
114
-42
| -27% | -$949 |
|
2983
CALL
Nomura Holdings
NMR
$28.4B
| $11K | ﹤0.01% |
+60
| New | +$391 |
|
2984
CALL
Nucor
NUE
$55.7B
| $11K | ﹤0.01% |
124
+74
| +148% | +$3.55K |
|
2985
News Corp Class A
NWSA
$14.8B
| $11K | ﹤0.01% |
801
+796
| +15,920% | +$12.2K |
|
2986
O-I Glass
OI
$1.43B
| $11K | ﹤0.01% |
+508
| New | +$12.4K |
|
2987
CALL
Omnicell
OMCL
$1.89B
| $11K | ﹤0.01% |
+10
| New | +$365 |
|
2988
PUT
OneSpan
OSPN
$566M
| $11K | ﹤0.01% |
135
+68
| +101% | +$1.85K |
|
2989
PUT
Plains GP Holdings
PAGP
$5.18B
| $11K | ﹤0.01% |
+18
| New | +$1.35K |
|
2990
PUT
Post Holdings
POST
$4.17B
| $11K | ﹤0.01% |
275
+228
| +485% | +$7.04K |
|
2991
VanEck Retail ETF
RTH
$249M
| $11K | ﹤0.01% |
+151
| New | +$11.5K |
|
2992
Schwab US Large- Cap ETF
SCHX
$70.9B
| $11K | ﹤0.01% |
1,398
+1,290
| +1,194% | +$10.8K |
|
2993
PUT
Comscore
SCOR
$106M
| $11K | ﹤0.01% |
+3
| New | +$3.24K |
|
2994
CALL
Spire
SR
$4.91B
| $11K | ﹤0.01% |
+43
| New | +$2.24K |
|
2995
CALL
Teradyne
TER
$51.4B
| $11K | ﹤0.01% |
38
-15
| -28% | -$300 |
|
2996
PUT
TSMC
TSM
$2.03T
| $11K | ﹤0.01% |
131
-2
| -2% | -$48 |
|
2997
PUT
Veeva Systems
VEEV
$32B
| $11K | ﹤0.01% |
37
-199
| -84% | -$5.4K |
|
2998
Valhi
VHI
$377M
| $11K | ﹤0.01% |
+163
| New | +$12.7K |
|
|
2999
PUT
Valhi
VHI
$377M
| $11K | ﹤0.01% |
+2
| New | +$156 |
|
3000
CALL
Welltower
WELL
$177B
| $11K | ﹤0.01% |
25
-1
| -4% | -$72 |
|
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.