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 |
Alphabet (Google) Class C
GOOG
|
+$54.6M |
| 2 |
Apple
AAPL
|
+$29.1M |
| 3 |
Meta Platforms (Facebook)
META
|
+$15.7M |
| 4 |
IBM
IBM
|
+$13.8M |
| 5 |
Baidu
BIDU
|
+$10.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$10.1M |
| 2 |
McDonald's
MCD
|
+$8.46M |
| 3 |
Ralph Lauren
RL
|
+$5.36M |
| 4 |
Intel
INTC
|
+$5.04M |
| 5 |
WBA
Walgreens Boots Alliance
WBA
|
+$4.76M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 14.27% |
| 2 | Technology | 10.3% |
| 3 | Healthcare | 7.76% |
| 4 | Consumer Discretionary | 6.32% |
| 5 | Financials | 5.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
CTXS
951
PUT
DELISTED
Citrix Systems Inc
CTXS
| $151K | 0.01% |
558
+539
| +2,837% | +$28.6K |
|
|
SHPG
952
CALL
DELISTED
Shire pic
SHPG
| $151K | 0.01% |
49
+7
| +17% | +$1.74K |
|
953
iShares Mortgage Real Estate ETF
REM
$540M
| $150K | 0.01% |
3,561
+2,685
| +307% | +$124K |
|
|
KATE
954
PUT
DELISTED
Kate Spade & Company
KATE
| $150K | 0.01% |
177
+152
| +608% | +$4.4K |
|
955
Guidewire Software
GWRE
$10.9B
| $149K | 0.01% |
2,826
+2,411
| +581% | +$124K |
|
956
CALL
AB InBev
BUD
$155B
| $148K | 0.01% |
822
+545
| +197% | +$66.9K |
|
957
PUT
Expedia Group
EXPE
$30.9B
| $148K | 0.01% |
406
+159
| +64% | +$16.4K |
|
958
State Street SPDR EURO STOXX 50 ETF
FEZ
$4.25B
| $148K | 0.01% |
3,960
-4,650
| -54% | -$184K |
|
|
SOHU
959
Sohu.com
SOHU
$331M
| $148K | 0.01% |
+2,509
| New | +$163K |
|
960
CALL
Tenet Healthcare
THC
$17.1B
| $148K | 0.01% |
376
+256
| +213% | +$13.1K |
|
|
COL
961
DELISTED
Rockwell Collins
COL
| $148K | 0.01% |
+1,603
| New | +$154K |
|
|
BWLD
962
CALL
DELISTED
Buffalo Wild Wings, Inc.
BWLD
| $148K | 0.01% |
164
+92
| +128% | +$15K |
|
963
Baytex Energy
BTE
$3.13B
| $147K | 0.01% |
9,491
-9,453
| -50% | -$166K |
|
964
PUT
Energy Transfer Partners
ET
$70.3B
| $147K | 0.01% |
638
+490
| +331% | +$16.4K |
|
965
CALL
MetLife
MET
$59.5B
| $147K | 0.01% |
748
+464
| +163% | +$22K |
|
966
CALL
Rockwell Medical
RMTI
$25.8M
| $147K | 0.01% |
3
+2
| +200% | +$2.54K |
|
967
PUT
Seagate
STX
$207B
| $147K | 0.01% |
405
+134
| +49% | +$7.4K |
|
968
CALL
Tucows
TCX
$101M
| $147K | 0.01% |
+165
| New | +$3.74K |
|
|
WBMD
969
DELISTED
WebMD Health Corp.
WBMD
| $147K | 0.01% |
3,322
+3,279
| +7,626% | +$150K |
|
970
CALL
United Rentals
URI
$71.4B
| $146K | 0.01% |
386
+20
| +5% | +$1.92K |
|
|
SINA
971
PUT
DELISTED
Sina Corp
SINA
| $146K | 0.01% |
402
+360
| +857% | +$16.4K |
|
972
American Coastal Insurance
ACIC
$484M
| $145K | 0.01% |
9,332
+3,554
| +62% | +$61.2K |
|
973
PVH
PVH
$3.59B
| $145K | 0.01% |
1,265
-4,975
| -80% | -$540K |
|
974
CALL
T-Mobile US
TMUS
$184B
| $145K | 0.01% |
794
+208
| +35% | +$7.45K |
|
975
PUT
Voya Financial
VOYA
$8.78B
| $145K | 0.01% |
105
+97
| +1,213% | +$4.37K |
|
Similar funds
Simplex Trading's Q2 2015 Portfolio in Review
As of Q2 2015, Simplex Trading held 6,639 positions worth $1.19B, up 39% from $860M the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $279M of net new capital in Q2 2015, opening 1,607 new positions and adding to 1,829 existing holdings. Its largest new stake was IBM: 85,948 shares worth $13.4M.
By sector, the portfolio is most concentrated in Communication Services at 14% of assets, up from 7.8% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Intel, an estimated $5.04M trimmed.
- Simplex Trading's largest Q2 2015 buy was IBM: 85,948 shares worth $13.4M.
- Simplex Trading added most to Alphabet (Google) Class C in Q2 2015, an estimated $54.6M increase.
- Simplex Trading's biggest Q2 2015 reduction was Intel, cutting an estimated $5.04M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q2 2015, selling an estimated $10.1M.
- Simplex Trading's ten largest holdings make up 20% of its $1.19B portfolio in Q2 2015.
- Simplex Trading opened 1,607 new positions and closed 1,438 in Q2 2015.
- Simplex Trading's portfolio value rose 39% quarter-over-quarter to $1.19B.
Based on Simplex Trading's 13F filing for Q2 2015, filed 8 Jul 2015.