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 | |
|---|---|---|---|---|---|---|
4276
Teucrium Wheat Fund
WEAT
$294M
| $92K | ﹤0.01% |
3,211
+1,182
| +58% | +$31.9K |
|
|
JBTM
4277
JBT Marel
JBTM
$7.31B
| $92K | ﹤0.01% |
+762
| New | +$81.9K |
|
|
BREW
4278
PUT
DELISTED
Craft Brew Alliance, Inc.
BREW
| $92K | ﹤0.01% |
66
+41
| +164% | +$586 |
|
4279
Astec Industries
ASTE
$1.18B
| $91K | ﹤0.01% |
+2,795
| New | +$93.8K |
|
4280
CALL
Bank of Hawaii
BOH
$3.15B
| $91K | ﹤0.01% |
+11
| New | +$885 |
|
4281
PUT
Century Aluminum
CENX
$4.44B
| $91K | ﹤0.01% |
133
-38
| -22% | -$282 |
|
4282
Caesarstone
CSTE
$71.6M
| $91K | ﹤0.01% |
6,069
-26,226
| -81% | -$392K |
|
4283
Duluth Holdings
DLTH
$154M
| $91K | ﹤0.01% |
6,752
+6,356
| +1,605% | +$103K |
|
4284
ProShares UltraShort FTSE Europe
EPV
$10.9M
| $91K | ﹤0.01% |
+606
| New | +$96.6K |
|
4285
CALL
Federated Hermes
FHI
$4.51B
| $91K | ﹤0.01% |
28
-435
| -94% | -$13.7K |
|
4286
PUT
Hudbay
HBM
$10.1B
| $91K | ﹤0.01% |
170
-41
| -19% | -$243 |
|
4287
PUT
Noodles & Co
NDLS
$105M
| $91K | ﹤0.01% |
15
-24
| -62% | -$1.39K |
|
4288
CALL
Schwab US Broad Market ETF
SCHB
$43B
| $91K | ﹤0.01% |
90
-48
| -35% | -$554 |
|
4289
PUT
Scansource
SCSC
$1.15B
| $91K | ﹤0.01% |
28
-131
| -82% | -$4.45K |
|
4290
CALL
Silgan Holdings
SLGN
$4.34B
| $91K | ﹤0.01% |
30
+14
| +88% | +$418 |
|
4291
CALL
Antero Midstream
AM
$10.2B
| $90K | ﹤0.01% |
79
+58
| +276% | +$743 |
|
|
4292
PUT
Antero Midstream
AM
$10.2B
| $90K | ﹤0.01% |
79
-336
| -81% | -$4.3K |
|
|
CVSA
4293
CALL
Covista Inc
CVSA
$4.3B
| $90K | ﹤0.01% |
20
+18
| +900% | +$826 |
|
4294
CALL
BlackLine
BL
$1.8B
| $90K | ﹤0.01% |
17
-3
| -15% | -$149 |
|
|
CUK
4295
CALL
DELISTED
Carnival PLC
CUK
| $90K | ﹤0.01% |
+20
| New | +$1.03K |
|
4296
Gerdau
GGB
$9.74B
| $90K | ﹤0.01% |
29,203
-3,517
| -11% | -$10.3K |
|
4297
CALL
Kinross Gold
KGC
$28.2B
| $90K | ﹤0.01% |
233
+189
| +430% | +$637 |
|
|
HAPN
4298
CALL
Happen Inc
HAPN
$2.23B
| $90K | ﹤0.01% |
55
-6
| -10% | -$95 |
|
4299
CALL
NNN REIT
NNN
$9.16B
| $90K | ﹤0.01% |
17
+3
| +21% | +$160 |
|
4300
Natera
NTRA
$38.6B
| $90K | ﹤0.01% |
3,274
+1,593
| +95% | +$35.1K |
|
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.