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 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$49.8M |
| 2 |
Apple
AAPL
|
+$24.5M |
| 3 |
Citigroup
C
|
+$23.5M |
| 4 |
Amazon
AMZN
|
+$22.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$18.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
LNKD
LinkedIn Corporation
LNKD
|
+$17.4M |
| 2 |
Wells Fargo
WFC
|
+$13.5M |
| 3 |
MDVN
MEDIVATION, INC.
MDVN
|
+$8.62M |
| 4 |
Goldman Sachs
GS
|
+$8.5M |
| 5 |
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
|
+$8.15M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 8.76% |
| 2 | Technology | 7.19% |
| 3 | Healthcare | 6.91% |
| 4 | Consumer Discretionary | 6.53% |
| 5 | Financials | 5.37% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1251
Invesco CurrencyShares Canadian Dollar Trust
FXC
$69.3M
| $147K | 0.01% |
1,999
-386
| -16% | -$28.6K |
|
1252
Kinder Morgan
KMI
$73.2B
| $147K | 0.01% |
+7,145
| New | +$151K |
|
1253
Lands' End
LE
$362M
| $147K | 0.01% |
9,743
-11,309
| -54% | -$185K |
|
|
GPOR
1254
PUT
DELISTED
Gulfport Energy Corp.
GPOR
| $147K | 0.01% |
619
+233
| +60% | +$5.98K |
|
|
AXDX
1255
DELISTED
Accelerate Diagnostics
AXDX
| $146K | 0.01% |
705
-55
| -7% | -$13.1K |
|
1256
CALL
Goodyear
GT
$2.07B
| $146K | 0.01% |
843
+569
| +208% | +$17.6K |
|
1257
Oneok
OKE
$58.8B
| $146K | 0.01% |
2,546
-1,166
| -31% | -$61.2K |
|
1258
Penumbra
PEN
$12.5B
| $146K | 0.01% |
+2,300
| New | +$154K |
|
1259
CALL
Tyson Foods
TSN
$20.2B
| $146K | 0.01% |
1,200
+466
| +63% | +$30.6K |
|
|
MRO
1260
CALL
DELISTED
Marathon Oil Corporation
MRO
| $146K | 0.01% |
1,238
+221
| +22% | +$3.55K |
|
1261
Galicia Financial Group
GGAL
$7.95B
| $145K | 0.01% |
5,389
-6,685
| -55% | -$192K |
|
1262
Trane Technologies
TT
$106B
| $145K | 0.01% |
1,939
-5,040
| -72% | -$364K |
|
|
RFP
1263
DELISTED
Resolute Forest Products Inc.
RFP
| $145K | 0.01% |
+27,205
| New | +$124K |
|
|
PVG
1264
CALL
DELISTED
PRETIUM RESOURCES INC.
PVG
| $145K | 0.01% |
1,177
+1,073
| +1,032% | +$9.47K |
|
1265
CALL
Weibo
WB
$1.9B
| $144K | 0.01% |
487
-175
| -26% | -$8.35K |
|
|
LVLT
1266
PUT
DELISTED
Level 3 Communications Inc
LVLT
| $144K | 0.01% |
451
+203
| +82% | +$10.7K |
|
1267
PUT
Aecom
ACM
$9.11B
| $143K | 0.01% |
214
+194
| +970% | +$6.44K |
|
|
TA
1268
DELISTED
TravelCenters of America LLC
TA
| $143K | 0.01% |
4,037
+1,474
| +58% | +$49.9K |
|
|
BRS
1269
CALL
DELISTED
Bristow Group, Inc.
BRS
| $143K | 0.01% |
1,165
+1,126
| +2,887% | +$17K |
|
|
SE
1270
CALL
DELISTED
Spectra Energy Corp Wi
SE
| $143K | 0.01% |
526
-1,006
| -66% | -$41.7K |
|
|
WNR
1271
PUT
DELISTED
Western Refining Inc
WNR
| $143K | 0.01% |
962
+550
| +133% | +$18.1K |
|
1272
CALL
Akamai
AKAM
$16.9B
| $142K | 0.01% |
432
+118
| +38% | +$7.51K |
|
1273
CALL
United States Natural Gas Fund
UNG
$470M
| $142K | 0.01% |
109
+48
| +79% | +$6.52K |
|
1274
US Foods
USFD
$21.5B
| $142K | 0.01% |
5,196
+4,455
| +601% | +$107K |
|
1275
Virtu Financial
VIRT
$5.19B
| $142K | 0.01% |
8,931
-1,408
| -14% | -$20.1K |
|
Similar funds
Simplex Trading's Q4 2016 Portfolio in Review
As of Q4 2016, Simplex Trading held 7,301 positions worth $1.67B, up 13% from $1.48B the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $181M of net new capital in Q4 2016, opening 1,543 new positions and adding to 2,137 existing holdings. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
By sector, the portfolio is most concentrated in Communication Services at 8.8% of assets, up from 8.4% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Goldman Sachs, an estimated $8.5M trimmed.
- Simplex Trading's largest Q4 2016 buy was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
- Simplex Trading added most to Apple in Q4 2016, an estimated $24.5M increase.
- Simplex Trading's biggest Q4 2016 reduction was Goldman Sachs, cutting an estimated $8.5M.
- Simplex Trading fully exited LinkedIn Corporation in Q4 2016, selling an estimated $17.4M.
- Simplex Trading's ten largest holdings make up 20% of its $1.67B portfolio in Q4 2016.
- Simplex Trading opened 1,543 new positions and closed 1,480 in Q4 2016.
- Simplex Trading's portfolio value rose 13% quarter-over-quarter to $1.67B.
Based on Simplex Trading's 13F filing for Q4 2016, filed 11 Jan 2017.