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 |
Amazon
AMZN
|
+$83.1M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37.2M |
| 3 |
Amgen
AMGN
|
+$30.5M |
| 4 |
Micron Technology
MU
|
+$28.8M |
| 5 |
Qualcomm
QCOM
|
+$18.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$29.5M |
| 2 |
Goldman Sachs
GS
|
+$27.8M |
| 3 |
Gilead Sciences
GILD
|
+$27.6M |
| 4 |
Booking.com
BKNG
|
+$25.4M |
| 5 |
AT&T
T
|
+$19.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 13.55% |
| 2 | Communication Services | 11.57% |
| 3 | Consumer Discretionary | 9.69% |
| 4 | Healthcare | 7.28% |
| 5 | Financials | 4.17% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3876
PUT
Extreme Networks
EXTR
$3.91B
| $11K | ﹤0.01% |
+205
| New | +$1.81K |
|
|
DMC
3877
Del Monte Corp
DMC
$1.4B
| $11K | ﹤0.01% |
224
-260
| -54% | -$14.1K |
|
3878
Forum Energy Technologies
FET
$570M
| $11K | ﹤0.01% |
37
-345
| -90% | -$119K |
|
3879
CALL
Flowers Foods
FLO
$1.57B
| $11K | ﹤0.01% |
391
-134
| -26% | -$2.52K |
|
3880
CALL
Flotek Industries
FTK
$805M
| $11K | ﹤0.01% |
46
+33
| +254% | +$2.08K |
|
|
HIMX
3881
PUT
Himax Technologies
HIMX
$2.07B
| $11K | ﹤0.01% |
167
-168
| -50% | -$1.28K |
|
3882
Harmony Gold Mining
HMY
$9.87B
| $11K | ﹤0.01% |
6,938
-15,385
| -69% | -$33K |
|
3883
PUT
Host Hotels & Resorts
HST
$17.5B
| $11K | ﹤0.01% |
651
+582
| +843% | +$10.7K |
|
3884
CALL
Jones Lang LaSalle
JLL
$16B
| $11K | ﹤0.01% |
22
+9
| +69% | +$1.03K |
|
|
3885
PUT
Jones Lang LaSalle
JLL
$16B
| $11K | ﹤0.01% |
456
+174
| +62% | +$20K |
|
3886
CALL
Kulicke & Soffa
KLIC
$4.4B
| $11K | ﹤0.01% |
75
-169
| -69% | -$3.56K |
|
3887
CALL
Kilroy Realty
KRC
$4.61B
| $11K | ﹤0.01% |
+85
| New | +$6.26K |
|
3888
CALL
LivePerson
LPSN
$22.6M
| $11K | ﹤0.01% |
+10
| New | +$1.37K |
|
3889
CALL
Larimar Therapeutics
LRMR
$385M
| $11K | ﹤0.01% |
+8
| New | +$409 |
|
3890
PUT
Moody's
MCO
$84.1B
| $11K | ﹤0.01% |
83
-208
| -71% | -$24.3K |
|
3891
CALL
MacroGenics
MGNX
$238M
| $11K | ﹤0.01% |
104
+99
| +1,980% | +$1.89K |
|
3892
Mueller Industries
MLI
$14.5B
| $11K | ﹤0.01% |
1,492
+812
| +119% | +$6.27K |
|
3893
PUT
Marvell Technology
MRVL
$153B
| $11K | ﹤0.01% |
48
-74
| -61% | -$1.2K |
|
3894
PUT
Motorola Solutions
MSI
$72.2B
| $11K | ﹤0.01% |
366
+21
| +6% | +$1.78K |
|
3895
PUT
M&T Bank
MTB
$36.4B
| $11K | ﹤0.01% |
162
-40
| -20% | -$6.31K |
|
3896
MGIC Investment
MTG
$6.5B
| $11K | ﹤0.01% |
1,069
-3,203
| -75% | -$34.4K |
|
3897
CALL
Murphy USA
MUSA
$11.5B
| $11K | ﹤0.01% |
48
+1
| +2% | +$70 |
|
3898
CALL
NiSource
NI
$21.6B
| $11K | ﹤0.01% |
51
-5
| -9% | -$125 |
|
3899
PUT
Natural Resource Partners
NRP
$1.31B
| $11K | ﹤0.01% |
26
-34
| -57% | -$1.06K |
|
3900
PUT
Onto Innovation
ONTO
$11.1B
| $11K | ﹤0.01% |
43
-4
| -9% | -$113 |
|
Similar funds
Simplex Trading's Q2 2017 Portfolio in Review
As of Q2 2017, Simplex Trading held 7,527 positions worth $2.3B, down 0.39% from $2.31B the previous quarter. Its ten largest holdings account for 23% of the portfolio.
Simplex Trading withdrew a net $114M in Q2 2017, closing 1,474 positions and reducing 2,320 holdings. Its most notable exit was AT&T, an estimated $19.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 14% of assets, up from 9.7% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amgen worth $32.3M.
- Simplex Trading's largest Q2 2017 buy was Amgen: 187,633 shares worth $32.3M.
- Simplex Trading added most to Amazon in Q2 2017, an estimated $83.1M increase.
- Simplex Trading's biggest Q2 2017 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $29.5M.
- Simplex Trading fully exited AT&T in Q2 2017, selling an estimated $19.6M.
- Simplex Trading's ten largest holdings make up 23% of its $2.3B portfolio in Q2 2017.
- Simplex Trading opened 1,408 new positions and closed 1,474 in Q2 2017.
- Simplex Trading's portfolio value fell 0.39% quarter-over-quarter to $2.3B.
Based on Simplex Trading's 13F filing for Q2 2017, filed 12 Jul 2017.