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 | |
|---|---|---|---|---|---|---|
3251
CALL
International Paper
IP
$22.5B
| $8K | ﹤0.01% |
543
+276
| +103% | +$13.7K |
|
3252
CALL
Itaú Unibanco
ITUB
$92.3B
| $8K | ﹤0.01% |
162
+70
| +76% | +$329 |
|
3253
PUT
Jazz Pharmaceuticals
JAZZ
$16B
| $8K | ﹤0.01% |
42
-21
| -33% | -$3.77K |
|
3254
CALL
KLA
KLAC
$266B
| $8K | ﹤0.01% |
250
| – | – |
|
3255
Mid-America Apartment Communities
MAA
$15.5B
| $8K | ﹤0.01% |
+113
| New | +$8.54K |
|
3256
CALL
Manhattan Associates
MANH
$9.42B
| $8K | ﹤0.01% |
+7
| New | +$387 |
|
3257
PUT
Magna International
MGA
$18.3B
| $8K | ﹤0.01% |
52
+16
| +44% | +$890 |
|
3258
MKS Inc
MKSI
$21.3B
| $8K | ﹤0.01% |
221
-677
| -75% | -$24.7K |
|
3259
PUT
Movado Group
MOV
$835M
| $8K | ﹤0.01% |
79
-47
| -37% | -$1.35K |
|
3260
PUT
Murphy Oil
MUR
$5.38B
| $8K | ﹤0.01% |
9
-41
| -82% | -$1.87K |
|
|
NGD
3261
PUT
DELISTED
New Gold Inc
NGD
| $8K | ﹤0.01% |
111
+97
| +693% | +$317 |
|
3262
CALL
NRG Energy
NRG
$28.8B
| $8K | ﹤0.01% |
61
-41
| -40% | -$1.02K |
|
3263
CALL
Novavax
NVAX
$1.23B
| $8K | ﹤0.01% |
2
-3
| -60% | -$527 |
|
3264
PUT
Realty Income
O
$61.1B
| $8K | ﹤0.01% |
+34
| New | +$1.55K |
|
3265
Prestige Consumer Healthcare
PBH
$2.39B
| $8K | ﹤0.01% |
+184
| New | +$8.05K |
|
3266
CALL
Parker-Hannifin
PH
$124B
| $8K | ﹤0.01% |
65
+60
| +1,200% | +$7.25K |
|
3267
Philips
PHG
$24.3B
| $8K | ﹤0.01% |
447
-130
| -23% | -$2.56K |
|
3268
CALL
Ryder
R
$10.3B
| $8K | ﹤0.01% |
55
+38
| +224% | +$3.59K |
|
3269
CALL
FreightCar America
RAIL
$279M
| $8K | ﹤0.01% |
+125
| New | +$3.18K |
|
3270
CALL
RingCentral
RNG
$4.5B
| $8K | ﹤0.01% |
128
+67
| +110% | +$1.17K |
|
3271
Rayonier Advanced Materials
RYAM
$573M
| $8K | ﹤0.01% |
531
-534
| -50% | -$8.79K |
|
3272
PUT
SM Energy
SM
$7.26B
| $8K | ﹤0.01% |
44
-75
| -63% | -$3.96K |
|
3273
PUT
State Street SPDR Portfolio Europe ETF
SPEU
$716M
| $8K | ﹤0.01% |
110
-20
| -15% | -$731 |
|
3274
PUT
Sunoco
SUN
$14B
| $8K | ﹤0.01% |
+51
| New | +$2.45K |
|
3275
Teradyne
TER
$52.4B
| $8K | ﹤0.01% |
422
-1,798
| -81% | -$35.9K |
|
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.