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 | |
|---|---|---|---|---|---|---|
|
BPL
1301
PUT
DELISTED
Buckeye Partners, L.P.
BPL
| $138K | 0.01% |
305
+20
| +7% | +$1.32K |
|
1302
HSBC
HSBC
$355B
| $137K | 0.01% |
+3,778
| New | +$134K |
|
1303
Merck
MRK
$324B
| $137K | 0.01% |
+2,446
| New | +$143K |
|
|
TOUR
1304
PUT
Tuniu
TOUR
$55.4M
| $137K | 0.01% |
75
-14
| -16% | -$1.27K |
|
1305
Corpay
CPAY
$24.2B
| $137K | 0.01% |
+969
| New | +$152K |
|
|
CHK
1306
PUT
DELISTED
Chesapeake Energy Corporation
CHK
| $137K | 0.01% |
18
+9
| +100% | +$11.8K |
|
|
CLC
1307
DELISTED
Clarcor
CLC
| $137K | 0.01% |
+1,667
| New | +$118K |
|
|
EGN
1308
DELISTED
Energen
EGN
| $136K | 0.01% |
2,367
-22,873
| -91% | -$1.3M |
|
1309
Eldorado Gold
EGO
$8.31B
| $135K | 0.01% |
8,411
-10,508
| -56% | -$165K |
|
1310
Iovance Biotherapeutics
IOVA
$2.23B
| $135K | 0.01% |
19,563
+4,480
| +30% | +$30.8K |
|
1311
SITE Centers
SITC
$230M
| $135K | 0.01% |
+6,880
| New | +$137K |
|
1312
PUT
Whirlpool
WHR
$2.42B
| $135K | 0.01% |
592
+20
| +3% | +$3.31K |
|
1313
PUT
Honeywell
HON
$77B
| $134K | 0.01% |
3,009
-404
| -12% | -$41.1K |
|
1314
Atlassian
TEAM
$22B
| $134K | 0.01% |
5,597
+2,740
| +96% | +$74.1K |
|
|
LL
1315
PUT
DELISTED
LL Flooring Holdings, Inc.
LL
| $134K | 0.01% |
286
+34
| +13% | +$592 |
|
|
BID
1316
PUT
DELISTED
Sotheby's
BID
| $134K | 0.01% |
827
+57
| +7% | +$2.16K |
|
1317
Arbutus Biopharma
ABUS
$865M
| $133K | 0.01% |
54,527
+33,389
| +158% | +$97.2K |
|
1318
PUT
Acadia Pharmaceuticals
ACAD
$4.25B
| $133K | 0.01% |
985
+616
| +167% | +$16.3K |
|
1319
Enova International
ENVA
$5.9B
| $133K | 0.01% |
+10,677
| New | +$115K |
|
1320
PUT
Cheniere Energy
LNG
$56.5B
| $133K | 0.01% |
1,892
+1,492
| +373% | +$60.2K |
|
|
CS
1321
CALL
DELISTED
Credit Suisse Group
CS
| $133K | 0.01% |
1,109
+921
| +490% | +$12.9K |
|
|
SODA
1322
CALL
DELISTED
SodaStream International Ltd
SODA
| $133K | 0.01% |
95
+8
| +9% | +$258 |
|
|
OMED
1323
DELISTED
OncoMed Pharmaceuticals, Inc.
OMED
| $133K | 0.01% |
17,285
-7,392
| -30% | -$67.9K |
|
1324
Accuray
ARAY
$28.4M
| $132K | 0.01% |
28,698
+27,971
| +3,847% | +$145K |
|
1325
Direxion Daily S&P Oil & Gas Exp. & Prod. Bear 2X ETF
DRIP
$103M
| $132K | 0.01% |
+24
| New | +$179K |
|
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.