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 |
NVIDIA
NVDA
|
+$29.6M |
| 2 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$22.6M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$17.9M |
| 4 |
Netflix
NFLX
|
+$17.1M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$13.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 2 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$40.6M |
| 3 |
Walt Disney
DIS
|
+$25.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.5M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.5% |
| 2 | Communication Services | 0.5% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.3% |
| 5 | Consumer Discretionary | 0.26% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
WBA
251
CALL
DELISTED
Walgreens Boots Alliance
WBA
| $18.5M | 0.05% |
3,379
-926
| -22% | -$49.2K |
|
252
CALL
NextEra Energy
NEE
$186B
| $18.5M | 0.05% |
3,604
-468
| -11% | -$23K |
|
253
CALL
American Tower
AMT
$77.1B
| $18.4M | 0.05% |
898
+512
| +133% | +$103K |
|
254
PUT
Applied Materials
AMAT
$442B
| $18.2M | 0.05% |
4,044
-647
| -14% | -$27.2K |
|
|
RDS.A
255
CALL
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $18.1M | 0.05% |
2,769
-312
| -10% | -$19.9K |
|
256
CALL
Eli Lilly
LLY
$1.04T
| $18M | 0.05% |
1,629
+178
| +12% | +$21K |
|
257
CALL
Uber
UBER
$144B
| $17.8M | 0.05% |
+3,835
| New | +$163K |
|
258
PUT
Charter Communications
CHTR
$15.6B
| $17.5M | 0.05% |
444
+28
| +7% | +$10.5K |
|
|
259
CALL
Applied Materials
AMAT
$442B
| $17.5M | 0.05% |
3,900
-1,470
| -27% | -$61.9K |
|
260
CALL
BP
BP
$112B
| $17.5M | 0.05% |
4,264
+734
| +21% | +$30.8K |
|
261
CALL
Kraft Heinz
KHC
$30.9B
| $17.4M | 0.05% |
5,593
-382
| -6% | -$12K |
|
262
CALL
eBay
EBAY
$49.6B
| $17M | 0.05% |
4,310
-1,443
| -25% | -$54.2K |
|
263
PUT
RTX Corp
RTX
$263B
| $17M | 0.05% |
2,074
-742
| -26% | -$62K |
|
264
PUT
Spotify
SPOT
$98.9B
| $16.9M | 0.05% |
1,159
+75
| +7% | +$10.3K |
|
|
ALXN
265
PUT
DELISTED
Alexion Pharmaceuticals
ALXN
| $16.9M | 0.05% |
1,289
-642
| -33% | -$82.7K |
|
266
CALL
Abbott
ABT
$174B
| $16.7M | 0.05% |
1,989
+364
| +22% | +$28.7K |
|
267
CALL
iShares Silver Trust
SLV
$29.1B
| $16.7M | 0.05% |
11,620
+6,309
| +119% | +$88.1K |
|
268
CALL
Morgan Stanley
MS
$342B
| $16.6M | 0.05% |
3,784
-1,305
| -26% | -$58.2K |
|
269
PUT
Expedia Group
EXPE
$31.7B
| $16.6M | 0.05% |
1,245
-62
| -5% | -$7.64K |
|
270
PUT
Intuit
INTU
$79.4B
| $16.3M | 0.04% |
625
+217
| +53% | +$55.1K |
|
271
PUT
Wayfair
W
$11.1B
| $16.2M | 0.04% |
1,112
-243
| -18% | -$36.5K |
|
272
PUT
Trade Desk
TTD
$8.4B
| $16.1M | 0.04% |
7,070
+1,170
| +20% | +$25.1K |
|
273
CALL
United Airlines
UAL
$38B
| $16M | 0.04% |
1,822
-58
| -3% | -$4.91K |
|
274
PUT
SLB Ltd
SLB
$71.4B
| $15.6M | 0.04% |
3,933
-3,185
| -45% | -$128K |
|
|
CTXS
275
PUT
DELISTED
Citrix Systems Inc
CTXS
| $15.6M | 0.04% |
1,587
+11
| +0.7% | +$1.08K |
|
Similar funds
Simplex Trading's Q2 2019 Portfolio in Review
As of Q2 2019, Simplex Trading held 8,406 positions worth $36.6B, up 1.9% from $36B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q2 2019 filing shows 1,261 new, 2,604 increased, 3,015 reduced and 1,301 closed positions. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M. The largest sale was Invesco QQQ Trust, an estimated $123M.
By sector, the portfolio is most concentrated in Technology at 0.5% of assets, up from 0.42% a quarter earlier, followed by Communication Services and Healthcare.
- Simplex Trading's largest Q2 2019 buy was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M.
- Simplex Trading added most to NVIDIA in Q2 2019, an estimated $29.6M increase.
- Simplex Trading's biggest Q2 2019 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $40.6M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2019, selling an estimated $123M.
- Simplex Trading's ten largest holdings make up 35% of its $36.6B portfolio in Q2 2019.
- Simplex Trading opened 1,261 new positions and closed 1,301 in Q2 2019.
- Simplex Trading's portfolio value rose 1.9% quarter-over-quarter to $36.6B.
Based on Simplex Trading's 13F filing for Q2 2019, filed 26 Jul 2019.