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 | |
|---|---|---|---|---|---|---|
1476
PUT
Cleveland-Cliffs
CLF
$6.81B
| $1.63M | ﹤0.01% |
1,528
-2,391
| -61% | -$23.6K |
|
1477
CALL
Consolidated Edison
ED
$41.6B
| $1.63M | ﹤0.01% |
186
+37
| +25% | +$3.19K |
|
1478
CALL
Tactile Systems Technology
TCMD
$620M
| $1.63M | ﹤0.01% |
286
+268
| +1,489% | +$14K |
|
1479
PUT
Fastenal
FAST
$54B
| $1.63M | ﹤0.01% |
998
-830
| -45% | -$13.7K |
|
1480
LyondellBasell Industries
LYB
$19.5B
| $1.63M | ﹤0.01% |
+18,885
| New | +$1.61M |
|
1481
CALL
AeroVironment
AVAV
$7.57B
| $1.62M | ﹤0.01% |
286
+136
| +91% | +$8.95K |
|
1482
CALL
OneMain Financial
OMF
$6.9B
| $1.62M | ﹤0.01% |
480
+438
| +1,043% | +$14.3K |
|
1483
PUT
Emerson Electric
EMR
$82.9B
| $1.62M | ﹤0.01% |
243
-375
| -61% | -$25.1K |
|
1484
CALL
Jabil
JBL
$32.8B
| $1.62M | ﹤0.01% |
513
-21
| -4% | -$603 |
|
1485
CALL
Tencent Music
TME
$14.5B
| $1.62M | ﹤0.01% |
1,082
-1,950
| -64% | -$30.8K |
|
1486
W.W. Grainger
GWW
$65.3B
| $1.62M | ﹤0.01% |
6,038
+3,990
| +195% | +$1.12M |
|
1487
CALL
Scotiabank
BNS
$106B
| $1.61M | ﹤0.01% |
297
-308
| -51% | -$16.5K |
|
1488
PUT
Acuity Brands
AYI
$9.88B
| $1.61M | ﹤0.01% |
117
+28
| +31% | +$3.85K |
|
|
BBBY
1489
CALL
DELISTED
Bed Bath & Beyond Inc
BBBY
| $1.61M | ﹤0.01% |
1,386
-816
| -37% | -$12.1K |
|
1490
CALL
NiSource
NI
$22.4B
| $1.61M | ﹤0.01% |
559
+414
| +286% | +$11.7K |
|
1491
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $1.6M | ﹤0.01% |
14,832
+12,693
| +593% | +$1.36M |
|
1492
CALL
AXIS Capital
AXS
$8.59B
| $1.6M | ﹤0.01% |
269
+268
| +26,800% | +$15.6K |
|
1493
CALL
ArcelorMittal
MT
$50.4B
| $1.6M | ﹤0.01% |
888
-1,267
| -59% | -$23.9K |
|
|
CEO
1494
PUT
DELISTED
CNOOC Limited
CEO
| $1.6M | ﹤0.01% |
94
-16
| -15% | -$2.79K |
|
1495
PUT
Crown Holdings
CCK
$12.8B
| $1.6M | ﹤0.01% |
262
-14
| -5% | -$816 |
|
1496
PUT
Colgate-Palmolive
CL
$72.6B
| $1.6M | ﹤0.01% |
223
-234
| -51% | -$16.6K |
|
1497
CALL
Howard Hughes
HHH
$3.93B
| $1.6M | ﹤0.01% |
135
+4
| +3% | +$410 |
|
1498
uniQure
QURE
$2.68B
| $1.6M | ﹤0.01% |
20,444
+19,414
| +1,885% | +$1.24M |
|
1499
Veeva Systems
VEEV
$30.3B
| $1.59M | ﹤0.01% |
+9,842
| New | +$1.43M |
|
|
KEM
1500
PUT
DELISTED
KEMET Corporation
KEM
| $1.59M | ﹤0.01% |
847
+546
| +181% | +$9.56K |
|
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.