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 | |
|---|---|---|---|---|---|---|
5426
PUT
Healthpeak Properties
DOC
$15.7B
| $25K | ﹤0.01% |
8
-102
| -93% | -$3.17K |
|
5427
CALL
e.l.f. Beauty
ELF
$4.96B
| $25K | ﹤0.01% |
18
+4
| +29% | +$48 |
|
5428
CALL
Erie Indemnity
ERIE
$12.7B
| $25K | ﹤0.01% |
+1
| New | +$207 |
|
5429
CALL
Energy Recovery
ERII
$433M
| $25K | ﹤0.01% |
24
-9
| -27% | -$89 |
|
5430
PUT
First Bancorp
FBP
$4.47B
| $25K | ﹤0.01% |
+23
| New | +$247 |
|
5431
Gentex
GNTX
$5.12B
| $25K | ﹤0.01% |
1,044
+186
| +22% | +$4.21K |
|
5432
FerroAtlántica
GSM
$628M
| $25K | ﹤0.01% |
14,948
-28,559
| -66% | -$54.4K |
|
5433
CALL
Itron
ITRI
$4.75B
| $25K | ﹤0.01% |
4
+2
| +100% | +$111 |
|
5434
PUT
MDU Resources
MDU
$4.31B
| $25K | ﹤0.01% |
26
-37
| -59% | -$360 |
|
5435
CALL
NewtekOne
NEWT
$425M
| $25K | ﹤0.01% |
11
+1
| +10% | +$22 |
|
5436
PUT
New Mountain Finance
NMFC
$668M
| $25K | ﹤0.01% |
18
+16
| +800% | +$224 |
|
5437
PUT
NMI Holdings
NMIH
$3.34B
| $25K | ﹤0.01% |
9
+6
| +200% | +$167 |
|
|
NOAH
5438
CALL
Noah Holdings
NOAH
$594M
| $25K | ﹤0.01% |
6
-16
| -73% | -$737 |
|
5439
NETGEAR
NTGR
$663M
| $25K | ﹤0.01% |
1,003
-1,849
| -65% | -$53.8K |
|
|
5440
PUT
NETGEAR
NTGR
$663M
| $25K | ﹤0.01% |
10
+6
| +150% | +$175 |
|
5441
CALL
Paysign
PAYS
$510M
| $25K | ﹤0.01% |
+19
| New | +$181 |
|
5442
CALL
Rockwell Medical
RMTI
$27.6M
| $25K | ﹤0.01% |
1
-2
| -67% | -$1.02K |
|
5443
PUT
Syndax Pharmaceuticals
SNDX
$1.74B
| $25K | ﹤0.01% |
27
-25
| -48% | -$182 |
|
5444
PUT
Savara
SVRA
$1.09B
| $25K | ﹤0.01% |
106
+66
| +165% | +$586 |
|
5445
PUT
Thomson Reuters
TRI
$45.1B
| $25K | ﹤0.01% |
4
+1
| +33% | +$66 |
|
|
TRVG
5446
PUT
trivago
TRVG
$387M
| $25K | ﹤0.01% |
12
-10
| -45% | -$204 |
|
5447
US Physical Therapy
USPH
$1.2B
| $25K | ﹤0.01% |
208
+54
| +35% | +$6.2K |
|
5448
CALL
Veru
VERU
$35.8M
| $25K | ﹤0.01% |
+12
| New | +$203 |
|
5449
CALL
Viavi Solutions
VIAV
$8.66B
| $25K | ﹤0.01% |
19
-989
| -98% | -$12.8K |
|
|
ENLC
5450
DELISTED
ENLINK MIDSTREAM, LLC
ENLC
| $25K | ﹤0.01% |
+2,543
| New | +$28.4K |
|
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.