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
|
+$29.8M |
| 2 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$17.1M |
| 3 |
Walt Disney
DIS
|
+$14.8M |
| 4 |
Gilead Sciences
GILD
|
+$11.8M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$11.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$92.9M |
| 2 |
Apple
AAPL
|
+$22.5M |
| 3 |
Meta Platforms (Facebook)
META
|
+$20.5M |
| 4 |
IBM
IBM
|
+$12.7M |
| 5 |
Baidu
BIDU
|
+$10M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Healthcare | 6.46% |
| 2 | Communication Services | 4.66% |
| 3 | Consumer Discretionary | 4.6% |
| 4 | Technology | 4.57% |
| 5 | Financials | 4.49% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
901
Hexcel
HXL
$8.29B
| $204K | 0.02% |
+4,557
| New | +$225K |
|
902
CALL
Transocean
RIG
$5.89B
| $204K | 0.02% |
2,428
+1,294
| +114% | +$18K |
|
903
Corpay
CPAY
$23.8B
| $204K | 0.02% |
1,488
-1,483
| -50% | -$227K |
|
|
ZOES
904
DELISTED
Zoe's Kitchen, Inc.
ZOES
| $204K | 0.02% |
5,176
+4,355
| +530% | +$170K |
|
|
ZSPH
905
DELISTED
ZS PHARMA INC COMS TK (DE)
ZSPH
| $204K | 0.02% |
3,110
+1,633
| +111% | +$98K |
|
|
CNW
906
DELISTED
CON-WAY INC.
CNW
| $204K | 0.02% |
+4,304
| New | +$169K |
|
|
DHC
907
Diversified Healthcare Trust
DHC
$2.24B
| $203K | 0.01% |
+12,694
| New | +$210K |
|
908
PUT
Etsy
ETSY
$7.68B
| $203K | 0.01% |
222
+211
| +1,918% | +$3.32K |
|
909
ICICI Bank
IBN
$105B
| $203K | 0.01% |
26,684
+21,988
| +468% | +$188K |
|
910
Standex International
SXI
$3.74B
| $203K | 0.01% |
2,700
+1,875
| +227% | +$144K |
|
911
Omega Healthcare
OHI
$15.2B
| $202K | 0.01% |
+5,756
| New | +$202K |
|
912
CALL
AB InBev
BUD
$155B
| $201K | 0.01% |
1,109
+287
| +35% | +$33.3K |
|
913
PUT
eBay
EBAY
$48.5B
| $201K | 0.01% |
601
-1,119
| -65% | -$30.1K |
|
914
CALL
Lam Research
LRCX
$400B
| $201K | 0.01% |
3,320
+1,820
| +121% | +$13.3K |
|
|
ZINC
915
PUT
DELISTED
HORSEHEAD HLDG CORP COM STK (DE)
ZINC
| $201K | 0.01% |
225
+199
| +765% | +$1.5K |
|
916
PUT
Kimberly-Clark
KMB
$35.6B
| $200K | 0.01% |
388
-4
| -1% | -$441 |
|
917
PUT
Coca-Cola
KO
$349B
| $200K | 0.01% |
1,914
+1,781
| +1,339% | +$71.3K |
|
918
Northern Trust
NTRS
$21.9B
| $200K | 0.01% |
+2,946
| New | +$216K |
|
|
SINA
919
PUT
DELISTED
Sina Corp
SINA
| $200K | 0.01% |
665
+263
| +65% | +$10.6K |
|
|
EXXI
920
PUT
DELISTED
ENERGY XXI LTD COM SHS
EXXI
| $200K | 0.01% |
150
+22
| +17% | +$37 |
|
921
PUT
Home Depot
HD
$324B
| $199K | 0.01% |
885
-395
| -31% | -$45.7K |
|
|
IMOS
922
ChipMOS TECHNOLOGIES
IMOS
$2.08B
| $199K | 0.01% |
11,004
+3,524
| +47% | +$69.6K |
|
923
Littelfuse
LFUS
$10.5B
| $199K | 0.01% |
+2,186
| New | +$199K |
|
|
AERI
924
DELISTED
Aerie Pharmaceuticals
AERI
| $199K | 0.01% |
11,240
-59,184
| -84% | -$1.07M |
|
|
EQM
925
DELISTED
EQM Midstream Partners, LP
EQM
| $199K | 0.01% |
+3,015
| New | +$228K |
|
Similar funds
Simplex Trading's Q3 2015 Portfolio in Review
As of Q3 2015, Simplex Trading held 7,014 positions worth $1.36B, up 14% from $1.19B the previous quarter. Its ten largest holdings account for 15% of the portfolio.
Simplex Trading's Q3 2015 filing shows 1,810 new, 2,203 increased, 1,391 reduced and 1,420 closed positions. Its largest new stake was iShares Russell 2000 ETF: 251,486 shares worth $27.5M. The largest sale was Alphabet (Google) Class C, an estimated $92.9M.
By sector, the portfolio is most concentrated in Healthcare at 6.5% of assets, down from 7.8% a quarter earlier, followed by Communication Services and Consumer Discretionary.
- Simplex Trading's largest Q3 2015 buy was iShares Russell 2000 ETF: 251,486 shares worth $27.5M.
- Simplex Trading added most to iShares MSCI Emerging Markets ETF in Q3 2015, an estimated $11.2M increase.
- Simplex Trading's biggest Q3 2015 reduction was Alphabet (Google) Class C, cutting an estimated $92.9M.
- Simplex Trading fully exited IBM in Q3 2015, selling an estimated $12.7M.
- Simplex Trading's ten largest holdings make up 15% of its $1.36B portfolio in Q3 2015.
- Simplex Trading opened 1,810 new positions and closed 1,420 in Q3 2015.
- Simplex Trading's portfolio value rose 14% quarter-over-quarter to $1.36B.
Based on Simplex Trading's 13F filing for Q3 2015, filed 8 Oct 2015.