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 | |
|---|---|---|---|---|---|---|
2726
PUT
Inogen
INGN
$167M
| $298K | ﹤0.01% |
24
+1
| +4% | +$165 |
|
2727
PUT
Murphy USA
MUSA
$11.3B
| $298K | ﹤0.01% |
39
-85
| -69% | -$6.7K |
|
2728
PUT
Gibraltar Industries
ROCK
$1.34B
| $298K | ﹤0.01% |
84
-178
| -68% | -$6.49K |
|
|
HA
2729
CALL
DELISTED
Hawaiian Holdings, Inc.
HA
| $298K | ﹤0.01% |
113
-190
| -63% | -$6.43K |
|
2730
PUT
Murphy Oil
MUR
$5.58B
| $297K | ﹤0.01% |
127
+42
| +49% | +$1.29K |
|
2731
PUT
Onto Innovation
ONTO
$13.6B
| $297K | ﹤0.01% |
109
-133
| -55% | -$4.1K |
|
2732
CALL
Pacific Biosciences
PACB
$422M
| $297K | ﹤0.01% |
402
-279
| -41% | -$1.77K |
|
2733
PUT
LiveRamp
RAMP
$2.29B
| $297K | ﹤0.01% |
77
-255
| -77% | -$11.5K |
|
|
YRD
2734
Yiren Digital
YRD
$103M
| $297K | ﹤0.01% |
27,657
-29,430
| -52% | -$462K |
|
|
ZEN
2735
PUT
DELISTED
ZENDESK INC
ZEN
| $297K | ﹤0.01% |
51
-27
| -35% | -$1.55K |
|
2736
CALL
Norwegian Cruise Line
NCLH
$8.89B
| $296K | ﹤0.01% |
70
-100
| -59% | -$4.85K |
|
2737
Omnicell
OMCL
$1.86B
| $296K | ﹤0.01% |
+4,834
| New | +$327K |
|
2738
Snap-on
SNA
$20.9B
| $296K | ﹤0.01% |
+2,044
| New | +$323K |
|
2739
PUT
Viking Therapeutics
VKTX
$4.04B
| $296K | ﹤0.01% |
387
-937
| -71% | -$11.2K |
|
|
HDS
2740
CALL
DELISTED
HD Supply Holdings, Inc.
HDS
| $296K | ﹤0.01% |
79
+59
| +295% | +$2.27K |
|
|
CHK
2741
PUT
DELISTED
Chesapeake Energy Corporation
CHK
| $296K | ﹤0.01% |
7
+6
| +600% | +$4.13K |
|
2742
Honeywell
HON
$77.1B
| $295K | ﹤0.01% |
+2,371
| New | +$324K |
|
2743
PUT
Hilltop Holdings
HTH
$2.29B
| $295K | ﹤0.01% |
166
+142
| +592% | +$2.69K |
|
2744
PUT
Spok Holdings
SPOK
$221M
| $295K | ﹤0.01% |
+223
| New | +$3.21K |
|
2745
WisdomTree India Earnings Fund ETF
EPI
$2.02B
| $294K | ﹤0.01% |
11,867
-11,032
| -48% | -$258K |
|
2746
Prestige Consumer Healthcare
PBH
$2.35B
| $294K | ﹤0.01% |
9,534
+4,294
| +82% | +$157K |
|
2747
Patterson-UTI
PTEN
$3.87B
| $294K | ﹤0.01% |
28,496
+13,053
| +85% | +$192K |
|
|
BMCH
2748
PUT
DELISTED
BMC Stock Holdings, Inc
BMCH
| $294K | ﹤0.01% |
190
+189
| +18,900% | +$3.15K |
|
|
CVRR
2749
CALL
DELISTED
CVR Refining, LP
CVRR
| $294K | ﹤0.01% |
282
-1
| -0.4% | -$16 |
|
2750
Banc of California
BANC
$3.28B
| $293K | ﹤0.01% |
22,054
+19,660
| +821% | +$319K |
|
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.