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 | |
|---|---|---|---|---|---|---|
776
CALL
Aflac
AFL
$63.8B
| $4.21M | 0.01% |
768
+372
| +94% | +$19.2K |
|
777
CALL
Hasbro
HAS
$12.5B
| $4.21M | 0.01% |
398
-173
| -30% | -$17K |
|
|
ZEN
778
CALL
DELISTED
ZENDESK INC
ZEN
| $4.2M | 0.01% |
472
+37
| +9% | +$3.18K |
|
779
SAP
SAP
$188B
| $4.2M | 0.01% |
30,699
-7,359
| -19% | -$916K |
|
780
PUT
Capri Holdings
CPRI
$1.79B
| $4.2M | 0.01% |
1,210
-402
| -25% | -$16.4K |
|
|
NRE
781
CALL
DELISTED
NorthStar Realty Europe Corp.
NRE
| $4.19M | 0.01% |
2,553
+2,201
| +625% | +$37.3K |
|
782
Merck
MRK
$325B
| $4.18M | 0.01% |
52,315
-90,559
| -63% | -$6.93M |
|
783
PUT
Ralph Lauren
RL
$22.2B
| $4.18M | 0.01% |
368
-405
| -52% | -$48.5K |
|
|
ZEN
784
PUT
DELISTED
ZENDESK INC
ZEN
| $4.17M | 0.01% |
468
+291
| +164% | +$25K |
|
785
PUT
Prologis
PLD
$137B
| $4.17M | 0.01% |
520
+330
| +174% | +$25.1K |
|
786
PUT
TSMC
TSM
$2.09T
| $4.16M | 0.01% |
1,063
-812
| -43% | -$33.4K |
|
|
CMA
787
PUT
DELISTED
Comerica
CMA
| $4.14M | 0.01% |
570
+348
| +157% | +$25.9K |
|
788
PUT
Allstate
ALL
$66.8B
| $4.14M | 0.01% |
407
-106
| -21% | -$10.4K |
|
789
PUT
Liberty Global Class C
LBTYK
$3.2B
| $4.13M | 0.01% |
1,535
-373
| -20% | -$9.58K |
|
790
PUT
GSK
GSK
$103B
| $4.13M | 0.01% |
826
+16
| +2% | +$803 |
|
|
LHCG
791
PUT
DELISTED
LHC Group LLC
LHCG
| $4.13M | 0.01% |
345
+17
| +5% | +$1.92K |
|
|
X
792
PUT
DELISTED
US Steel
X
| $4.12M | 0.01% |
2,688
-915
| -25% | -$14.1K |
|
|
DFS
793
CALL
DELISTED
Discover Financial Services
DFS
| $4.11M | 0.01% |
530
+87
| +20% | +$6.74K |
|
794
PUT
Travelers Companies
TRV
$80.8B
| $4.11M | 0.01% |
275
+61
| +29% | +$8.8K |
|
795
Amgen
AMGN
$203B
| $4.11M | 0.01% |
+22,283
| New | +$3.99M |
|
|
ABB
796
CALL
DELISTED
ABB Ltd
ABB
| $4.11M | 0.01% |
2,050
+1,085
| +112% | +$21.1K |
|
797
PUT
iQIYI
IQ
$1.19B
| $4.1M | 0.01% |
1,985
-200
| -9% | -$4.13K |
|
798
PUT
Linde
LIN
$237B
| $4.1M | 0.01% |
204
+178
| +685% | +$33.3K |
|
799
PUT
PPG Industries
PPG
$25.9B
| $4.1M | 0.01% |
351
-36
| -9% | -$4.1K |
|
|
SGI
800
CALL
Somnigroup International
SGI
$15.1B
| $4.09M | 0.01% |
2,232
+1,720
| +336% | +$27.7K |
|
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.