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 |
iShares Russell 2000 ETF
IWM
|
+$58.5M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$56.5M |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$44.1M |
| 4 |
Apple
AAPL
|
+$20.3M |
| 5 |
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
|
+$12.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$109M |
| 2 |
Meta Platforms (Facebook)
META
|
+$62.3M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$36.2M |
| 4 |
Goldman Sachs
GS
|
+$27.1M |
| 5 |
Boeing
BA
|
+$24.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.49% |
| 2 | Consumer Discretionary | 0.48% |
| 3 | Technology | 0.4% |
| 4 | Financials | 0.25% |
| 5 | Industrials | 0.22% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1376
CALL
Consolidated Edison
ED
$41.6B
| $1.36M | ﹤0.01% |
178
+7
| +4% | +$547 |
|
|
FISV
1377
PUT
Fiserv Inc
FISV
$27.2B
| $1.36M | ﹤0.01% |
185
+96
| +108% | +$7.42K |
|
1378
Moody's
MCO
$82.4B
| $1.36M | ﹤0.01% |
9,710
-1,048
| -10% | -$158K |
|
|
BBBY
1379
Bed Bath & Beyond
BBBY
$473M
| $1.36M | ﹤0.01% |
133,123
+47,886
| +56% | +$717K |
|
1380
Direxion Daily Gold Miners Index Bear 2X ETF
DUST
$72.3M
| $1.36M | ﹤0.01% |
24
-5
| -17% | -$393K |
|
1381
CALL
Viper Energy
VNOM
$8.81B
| $1.36M | ﹤0.01% |
521
-953
| -65% | -$31.2K |
|
1382
CALL
J.M. Smucker
SJM
$12.6B
| $1.35M | ﹤0.01% |
145
+59
| +69% | +$6.16K |
|
1383
CALL
Weyerhaeuser
WY
$17.3B
| $1.35M | ﹤0.01% |
620
+432
| +230% | +$11.5K |
|
1384
PUT
Signet Jewelers
SIG
$3.55B
| $1.35M | ﹤0.01% |
426
+153
| +56% | +$7.67K |
|
1385
iShares Core S&P Small-Cap ETF
IJR
$109B
| $1.35M | ﹤0.01% |
+19,511
| New | +$1.51M |
|
1386
Materion
MTRN
$5.01B
| $1.35M | ﹤0.01% |
+30,053
| New | +$1.6M |
|
1387
CALL
Iridium Communications
IRDM
$4.85B
| $1.35M | ﹤0.01% |
732
+471
| +180% | +$9.67K |
|
1388
Vipshop
VIPS
$6.84B
| $1.35M | ﹤0.01% |
247,350
-274,455
| -53% | -$1.48M |
|
|
NBIS
1389
PUT
Nebius Group N.V.
NBIS
$47.7B
| $1.35M | ﹤0.01% |
493
-1,724
| -78% | -$50.6K |
|
1390
PUT
Johnson Controls International
JCI
$87.5B
| $1.35M | ﹤0.01% |
454
-414
| -48% | -$13.7K |
|
1391
Check Point Software Technologies
CHKP
$13.3B
| $1.34M | ﹤0.01% |
+13,106
| New | +$1.44M |
|
|
MIK
1392
CALL
DELISTED
Michaels Stores, Inc
MIK
| $1.34M | ﹤0.01% |
994
+672
| +209% | +$10.7K |
|
1393
PUT
Synopsys
SNPS
$71.5B
| $1.34M | ﹤0.01% |
159
-139
| -47% | -$12.3K |
|
1394
CALL
TE Connectivity
TEL
$58.8B
| $1.34M | ﹤0.01% |
177
+134
| +312% | +$10.3K |
|
|
BNY
1395
Bank of New York Mellon
BNY
$108B
| $1.34M | ﹤0.01% |
28,421
+27,250
| +2,327% | +$1.32M |
|
1396
PUT
Transocean
RIG
$5.92B
| $1.33M | ﹤0.01% |
1,923
+975
| +103% | +$9.94K |
|
1397
CALL
Eagle Materials
EXP
$6.6B
| $1.33M | ﹤0.01% |
218
-46
| -17% | -$3.3K |
|
|
LADR
1398
CALL
Ladder Capital
LADR
$1.25B
| $1.33M | ﹤0.01% |
860
+844
| +5,275% | +$14.3K |
|
1399
CALL
DaVita
DVA
$15.1B
| $1.33M | ﹤0.01% |
258
-320
| -55% | -$20.5K |
|
1400
PUT
AMC Entertainment Holdings
AMC
$2.03B
| $1.33M | ﹤0.01% |
108
+39
| +57% | +$6.38K |
|
Similar funds
Simplex Trading's Q4 2018 Portfolio in Review
As of Q4 2018, Simplex Trading held 8,576 positions worth $34.1B, up 9.5% from $31.1B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q4 2018 filing shows 1,199 new, 2,701 increased, 2,877 reduced and 1,573 closed positions. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M. The largest sale was Amazon, an estimated $109M.
By sector, the portfolio is most concentrated in Communication Services at 0.49% of assets, down from 0.89% a quarter earlier, followed by Consumer Discretionary and Technology.
- Simplex Trading's largest Q4 2018 buy was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q4 2018, an estimated $58.5M increase.
- Simplex Trading's biggest Q4 2018 reduction was Amazon, cutting an estimated $109M.
- Simplex Trading fully exited Meta Platforms (Facebook) in Q4 2018, selling an estimated $62.3M.
- Simplex Trading's ten largest holdings make up 43% of its $34.1B portfolio in Q4 2018.
- Simplex Trading opened 1,199 new positions and closed 1,573 in Q4 2018.
- Simplex Trading's portfolio value rose 9.5% quarter-over-quarter to $34.1B.
Based on Simplex Trading's 13F filing for Q4 2018, filed 16 Jan 2019.