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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1301
PUT
nVent Electric
NVT
$24.5B
| $7.58M | ﹤0.01% |
100,600
+98,400
| +4,473% | +$6.32M |
|
|
BBBY
1302
CALL
Bed Bath & Beyond
BBBY
$473M
| $7.58M | ﹤0.01% |
232,320
-733,040
| -76% | -$18.8M |
|
1303
PUT
Peloton Interactive
PTON
$2.63B
| $7.58M | ﹤0.01% |
1,769,300
+907,700
| +105% | +$4.48M |
|
1304
CALL
Corcept Therapeutics
CORT
$10.2B
| $7.57M | ﹤0.01% |
300,700
+75,500
| +34% | +$1.78M |
|
1305
PUT
Matador Resources
MTDR
$6.31B
| $7.57M | ﹤0.01% |
113,300
-107,600
| -49% | -$6.4M |
|
1306
PUT
Dynatrace
DT
$12.1B
| $7.52M | ﹤0.01% |
161,900
+56,700
| +54% | +$2.95M |
|
1307
PUT
GoDaddy
GDDY
$12.3B
| $7.51M | ﹤0.01% |
63,300
+6,100
| +11% | +$679K |
|
1308
CALL
BorgWarner
BWA
$13.2B
| $7.51M | ﹤0.01% |
216,200
+77,900
| +56% | +$2.55M |
|
|
FISV
1309
PUT
Fiserv Inc
FISV
$27.2B
| $7.5M | ﹤0.01% |
46,900
-40,400
| -46% | -$5.88M |
|
1310
Chemours
CC
$2.59B
| $7.49M | ﹤0.01% |
285,197
+284,659
| +52,911% | +$8.11M |
|
1311
CALL
Krystal Biotech
KRYS
$9.88B
| $7.46M | ﹤0.01% |
41,900
+7,200
| +21% | +$1M |
|
|
FITB
1312
PUT
Fifth Third Bancorp
FITB
$52B
| $7.45M | ﹤0.01% |
200,200
-15,100
| -7% | -$525K |
|
|
HUT
1313
CALL
Hut 8
HUT
$12.4B
| $7.44M | ﹤0.01% |
674,200
-28,400
| -4% | -$249K |
|
1314
PUT
Progress Software
PRGS
$1.55B
| $7.44M | ﹤0.01% |
139,600
+91,500
| +190% | +$5.03M |
|
1315
PUT
Centene
CNC
$31.3B
| $7.42M | ﹤0.01% |
94,600
-10,000
| -10% | -$772K |
|
1316
Gilead Sciences
GILD
$161B
| $7.42M | ﹤0.01% |
+101,243
| New | +$7.79M |
|
1317
PUT
Restaurant Brands International
QSR
$25.1B
| $7.41M | ﹤0.01% |
93,300
+28,500
| +44% | +$2.22M |
|
|
EDR
1318
PUT
DELISTED
Endeavor Group Holdings, Inc.
EDR
| $7.41M | ﹤0.01% |
288,100
+141,600
| +97% | +$3.47M |
|
1319
CALL
Dropbox
DBX
$6.81B
| $7.41M | ﹤0.01% |
305,000
+1,200
| +0.4% | +$33.6K |
|
|
FYBR
1320
PUT
DELISTED
Frontier Communications
FYBR
| $7.41M | ﹤0.01% |
302,400
-328,300
| -52% | -$7.77M |
|
1321
iShares Core S&P Total US Stock Market ETF
ITOT
$93.2B
| $7.37M | ﹤0.01% |
63,940
+34,961
| +121% | +$3.83M |
|
1322
CALL
Allegro MicroSystems
ALGM
$8.58B
| $7.35M | ﹤0.01% |
272,500
-27,400
| -9% | -$792K |
|
1323
PUT
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27B
| $7.34M | ﹤0.01% |
13,200
-38,100
| -74% | -$19.7M |
|
1324
PUT
Idexx Laboratories
IDXX
$42.9B
| $7.34M | ﹤0.01% |
13,600
-27,600
| -67% | -$15.1M |
|
1325
CALL
Travelers Companies
TRV
$80.8B
| $7.34M | ﹤0.01% |
31,900
+14,400
| +82% | +$3.08M |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.