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 |
Goldman Sachs
GS
|
+$40.4M |
| 2 |
NVIDIA
NVDA
|
+$23.1M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$21.5M |
| 4 |
Wells Fargo
WFC
|
+$20.8M |
| 5 |
Micron Technology
MU
|
+$20M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Citigroup
C
|
+$21.4M |
| 2 |
Apple
AAPL
|
+$15.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$14.4M |
| 4 |
Eli Lilly
LLY
|
+$10.5M |
| 5 |
iShares Biotechnology ETF
IBB
|
+$8.06M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 9.73% |
| 2 | Communication Services | 9.25% |
| 3 | Consumer Discretionary | 8.76% |
| 4 | Healthcare | 8.53% |
| 5 | Financials | 7.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
NVTA
951
DELISTED
Invitae Corporation
NVTA
| $314K | 0.01% |
28,409
-4,522
| -14% | -$43.4K |
|
952
Albemarle
ALB
$13.8B
| $313K | 0.01% |
+2,969
| New | +$289K |
|
953
CALL
Universal Display
OLED
$3.71B
| $313K | 0.01% |
314
-284
| -47% | -$20.4K |
|
|
ARR
954
Armour Residential REIT
ARR
$2B
| $312K | 0.01% |
2,751
+1,922
| +232% | +$211K |
|
955
Mercury Systems
MRCY
$6.39B
| $312K | 0.01% |
8,013
+6,470
| +419% | +$230K |
|
956
CALL
Texas Instruments
TXN
$259B
| $312K | 0.01% |
2,352
+269
| +13% | +$20.8K |
|
957
PUT
United Parcel Service
UPS
$97B
| $311K | 0.01% |
1,647
-1,499
| -48% | -$164K |
|
958
CALL
DuPont de Nemours
DD
$18.6B
| $310K | 0.01% |
661
+208
| +46% | +$32.3K |
|
|
AMRS
959
PUT
DELISTED
Amyris Inc.
AMRS
| $310K | 0.01% |
67
-2
| -3% | -$17 |
|
960
CALL
iShares Morningstar Value ETF
ILCV
$1.29B
| $309K | 0.01% |
15,002
+13,712
| +1,063% | +$659K |
|
961
PUT
Transocean
RIG
$5.89B
| $309K | 0.01% |
2,177
-1,351
| -38% | -$18.6K |
|
|
PSXP
962
DELISTED
PHILLIPS 66 PARTNERS LP
PSXP
| $309K | 0.01% |
6,036
+4,479
| +288% | +$239K |
|
963
PUT
Comcast
CMCSA
$78.3B
| $308K | 0.01% |
7,211
+1,603
| +29% | +$59.5K |
|
964
CALL
Marriott International
MAR
$96.1B
| $306K | 0.01% |
605
+144
| +31% | +$12.5K |
|
|
965
Transocean
RIG
$5.89B
| $305K | 0.01% |
+24,542
| New | +$337K |
|
|
PBPB
966
DELISTED
Potbelly
PBPB
| $304K | 0.01% |
21,872
+21,072
| +2,634% | +$277K |
|
967
CALL
PVH
PVH
$3.59B
| $304K | 0.01% |
595
+313
| +111% | +$29K |
|
968
CALL
Royal Caribbean
RCL
$76B
| $304K | 0.01% |
327
-235
| -42% | -$22K |
|
969
CALL
Mondelez International
MDLZ
$77.1B
| $299K | 0.01% |
3,154
+624
| +25% | +$27.7K |
|
|
KITE
970
CALL
DELISTED
Kite Pharma, Inc.
KITE
| $299K | 0.01% |
750
+405
| +117% | +$25K |
|
|
UFS
971
DELISTED
DOMTAR CORPORATION (New)
UFS
| $299K | 0.01% |
+8,198
| New | +$325K |
|
972
Franco-Nevada
FNV
$41.3B
| $298K | 0.01% |
4,555
-18,867
| -81% | -$1.22M |
|
|
ALR
973
DELISTED
Alere Inc
ALR
| $298K | 0.01% |
7,525
-22,675
| -75% | -$884K |
|
|
MPT
974
Medical Properties Trust
MPT
$2.87B
| $297K | 0.01% |
+23,064
| New | +$295K |
|
|
AFTY
975
DELISTED
Pacer CSOP FTSE China A50 ETF
AFTY
| $297K | 0.01% |
+21,473
| New | +$296K |
|
Similar funds
Simplex Trading's Q1 2017 Portfolio in Review
As of Q1 2017, Simplex Trading held 7,485 positions worth $2.31B, up 38% from $1.67B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading deployed $551M of net new capital in Q1 2017, opening 1,662 new positions and adding to 2,374 existing holdings. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
By sector, the portfolio is most concentrated in Technology at 9.7% of assets, up from 7.2% a quarter earlier, followed by Communication Services and Consumer Discretionary.
On the sell side, the largest reduction was Citigroup, an estimated $21.4M trimmed.
- Simplex Trading's largest Q1 2017 buy was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
- Simplex Trading added most to Goldman Sachs in Q1 2017, an estimated $40.4M increase.
- Simplex Trading's biggest Q1 2017 reduction was Citigroup, cutting an estimated $21.4M.
- Simplex Trading fully exited Invesco QQQ Trust in Q1 2017, selling an estimated $14.4M.
- Simplex Trading's ten largest holdings make up 18% of its $2.31B portfolio in Q1 2017.
- Simplex Trading opened 1,662 new positions and closed 1,369 in Q1 2017.
- Simplex Trading's portfolio value rose 38% quarter-over-quarter to $2.31B.
Based on Simplex Trading's 13F filing for Q1 2017, filed 21 Apr 2017.