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 | |
|---|---|---|---|---|---|---|
|
S
1076
DELISTED
Sprint Corporation
S
| $158K | 0.01% |
41,298
+36,460
| +754% | +$154K |
|
|
CEMP
1077
DELISTED
Cempra, Inc.
CEMP
| $158K | 0.01% |
5,688
-20,585
| -78% | -$765K |
|
|
NGLS
1078
PUT
DELISTED
TARGA RESOURCES PARTNERS LP COM UTS REPTG LTD PARTERSHIP INT
NGLS
| $158K | 0.01% |
58
-214
| -79% | -$7.21K |
|
|
MTSC
1079
DELISTED
MTS Systems Corp
MTSC
| $158K | 0.01% |
2,644
+2,381
| +905% | +$147K |
|
|
ASRT
1080
PUT
DELISTED
Assertio
ASRT
| $157K | 0.01% |
+3
| New | +$5.12K |
|
1081
PUT
Deutsche Bank
DB
$65.3B
| $157K | 0.01% |
403
+138
| +52% | +$3.81K |
|
1082
BHP
BHP
$212B
| $156K | 0.01% |
5,550
-4,716
| -46% | -$153K |
|
1083
CALL
General Motors
GM
$73B
| $156K | 0.01% |
1,427
+789
| +124% | +$24.2K |
|
1084
Public Service Enterprise Group
PEG
$39.8B
| $156K | 0.01% |
3,707
+3,177
| +599% | +$130K |
|
1085
Wabtec
WAB
$50.3B
| $156K | 0.01% |
+1,783
| New | +$170K |
|
|
SWN
1086
PUT
DELISTED
Southwestern Energy Company
SWN
| $156K | 0.01% |
707
+609
| +621% | +$10.6K |
|
1087
iShares MSCI Germany ETF
EWG
$1.49B
| $155K | 0.01% |
6,290
+3,048
| +94% | +$82.8K |
|
1088
PUT
Lumen
LUMN
$6.73B
| $155K | 0.01% |
532
+200
| +60% | +$5.54K |
|
1089
CALL
Perrigo
PRGO
$1.4B
| $155K | 0.01% |
575
+380
| +195% | +$69.7K |
|
1090
Protolabs
PRLB
$1.87B
| $155K | 0.01% |
2,314
-3,559
| -61% | -$254K |
|
1091
Qorvo
QRVO
$7.65B
| $155K | 0.01% |
+3,444
| New | +$208K |
|
1092
Snap-on
SNA
$20.5B
| $155K | 0.01% |
+1,032
| New | +$166K |
|
|
PCP
1093
PUT
DELISTED
PRECISION CASTPARTS CORP
PCP
| $155K | 0.01% |
710
+603
| +564% | +$129K |
|
1094
PUT
Bath & Body Works
BBWI
$3.9B
| $154K | 0.01% |
245
+167
| +214% | +$11.5K |
|
1095
CALL
Altria Group
MO
$120B
| $153K | 0.01% |
908
+589
| +185% | +$31.6K |
|
|
SLCA
1096
PUT
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $153K | 0.01% |
100
-40
| -29% | -$853 |
|
1097
CALL
PTC Therapeutics
PTCT
$6.51B
| $152K | 0.01% |
542
+277
| +105% | +$11.8K |
|
1098
PUT
Vipshop
VIPS
$6.92B
| $152K | 0.01% |
1,433
-674
| -32% | -$12.9K |
|
1099
Weibo
WB
$1.92B
| $152K | 0.01% |
+13,008
| New | +$171K |
|
1100
iShares US Transportation ETF
IYT
$2.33B
| $151K | 0.01% |
+4,328
| New | +$157K |
|
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.